[出现java.lang.NoClassDefFoundError: com/baomidou/mybatisplus/core/conditions/AbstractWrapper$$Lambda$798/831344888]

[javaHBZ]

问题描述

在我将对象转化为字符串的时候出现了这个问题,我用其他的工具包转化是没有问题的

环境信息

请填写以下信息：

• OS信息： [e.g.：CentOS 8.4.2105 4Core 3.10GHz 16 GB]
• JDK信息： [e.g.：Openjdk 1.8.0_312]
• 版本信息：[e.g.：Fastjson2 2.0.28]

重现步骤

如何操作可以重现该问题：

1. 使用 JSON.toJSONString(Object obj) 方法
2. 输入 数据
3. 出现 java.lang.NoClassDefFoundError: com/baomidou/mybatisplus/core/conditions/AbstractWrapper$$Lambda$798/831344888 错误

  public static Object intercept(Invocation invocation) throws Throwable {
        MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
        //请求参数
        Object parameter = null;
        if (1 < invocation.getArgs().length) {
            parameter = invocation.getArgs()[1];
        }
        BoundSql boundSql = mappedStatement.getBoundSql(parameter);
        String sql = boundSql.getSql();
        //执行的sql所在的mapper文件
        String resource = mappedStatement.getResource();
        //执行sql的dao文件的包名+方法名
        String daoMethod = mappedStatement.getId();
        //去除sql文中的换行
        sql = sql.replace("\n", "").replaceAll("\\s+", " ");
        if (SHOWSQL) {
            LOGGER.warn("\n" +
                            "[SQLMonitorPlugin]SQL监控：{}|{}\n" +//方法
                            "执行SQL：\n" +
                            "{}\n" +//SQL
                            "参数：{}", resource, daoMethod,
                    sql, JSON.toJSONString(parameter));
        }
        try {
            long start = System.currentTimeMillis();
            Object e = invocation.proceed();
            long timeTicket = System.currentTimeMillis() - start;
            if (SLOWER < timeTicket) {
                LOGGER.warn("[SQLMonitorInterceptor]SQL监控：{}|{}，慢SQL（{}/{}ms）{}，参数：{}",
                        resource, daoMethod, timeTicket, SLOWER, sql, JSON.toJSONString(parameter));
            }
            if (e instanceof Collection) {
                int ct = ((Collection<?>) e).size();
                if (MAXCOUNT < ct) {
                    LOGGER.warn("[SQLMonitorInterceptor]SQL监控：{}|{}，大集合（{}/{}）{}，参数：{}",
                            resource, daoMethod, ct, MAXCOUNT, sql, JSON.toJSONString(parameter));
                }
            }
            return e;
        } catch (Exception e) {
            LOGGER.warn("[SQLMonitorPlugin]SQL监控：{}|{}，执行出错：{}，参数：{}", resource, daoMethod,
                    sql, JSON.toJSONString(parameter), e);
            throw e;
        }
    }

期待的正确结果

成功转化为json字符串

相关日志输出

java.lang.NoClassDefFoundError: com/baomidou/mybatisplus/core/conditions/AbstractWrapper$$Lambda$798/831344888
at com.alibaba.fastjson2.writer.FieldWriterStringFunc.write(FieldWriterStringFunc.java:41)
at com.alibaba.fastjson2.writer.ObjectWriter1.write(ObjectWriter1.java:68)
at com.alibaba.fastjson2.writer.ObjectWriterImplList.write(ObjectWriterImplList.java:373)
at com.alibaba.fastjson2.writer.OWG_2_5_MergeSegments.write(Unknown Source)
at com.alibaba.fastjson2.writer.OWG_1_16_QueryWrapper.write(Unknown Source)
at com.alibaba.fastjson2.writer.ObjectWriterImplMap.write(ObjectWriterImplMap.java:548)
at com.alibaba.fastjson2.JSON.toJSONString(JSON.java:2334)
at org.beite.common.handler.MyBatisSQLMonitorPlugin.intercept(MyBatisSQLMonitorPlugin.java:64)
at org.beite.common.handler.SQLMonitorPlugin.beforeQuery(SQLMonitorPlugin.java:35)
at com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor.intercept(MybatisPlusInterceptor.java:78)
at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61)
at com.sun.proxy.$Proxy102.query(Unknown Source)
at com.github.pagehelper.PageInterceptor.intercept(PageInterceptor.java:132)
at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61)
at com.sun.proxy.$Proxy102.query(Unknown Source)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:427)
at com.sun.proxy.$Proxy80.selectList(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:224)
at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.executeForMany(MybatisMapperMethod.java:166)
at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:77)
at com.baomidou.mybatisplus.core.override.MybatisMapperProxy$PlainMethodInvoker.invoke(MybatisMapperProxy.java:148)
at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:89)
at com.sun.proxy.$Proxy86.selectList(Unknown Source)
at org.beite.service.impl.ArticleTagsServiceImpl.getTagsNames(ArticleTagsServiceImpl.java:57)
at org.beite.service.impl.ArticleTagsServiceImpl$$FastClassBySpringCGLIB$$a9f6dd3a.invoke()
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
at org.springframework.aop.framework.CglibAopProxy.invokeMethod(CglibAopProxy.java:386)
at org.springframework.aop.framework.CglibAopProxy.access$000(CglibAopProxy.java:85)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:704)
at org.beite.service.impl.ArticleTagsServiceImpl$$EnhancerBySpringCGLIB$$2806e68b.getTagsNames()
at org.beite.service.impl.ArticleServiceImpl.getArticleById(ArticleServiceImpl.java:129)
at org.beite.service.impl.ArticleServiceImpl$$FastClassBySpringCGLIB$$f7fbc213.invoke()
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
at org.springframework.aop.framework.CglibAopProxy.invokeMethod(CglibAopProxy.java:386)
at org.springframework.aop.framework.CglibAopProxy.access$000(CglibAopProxy.java:85)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:704)
at org.beite.service.impl.ArticleServiceImpl$$EnhancerBySpringCGLIB$$191ae4b6.getArticleById()
at org.beite.controller.article.ArticleController.getArticleById(ArticleController.java:47)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.beite.common.filter.AuthorizeAttributeFilter.doFilter(AuthorizeAttributeFilter.java:87)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: com.baomidou.mybatisplus.core.conditions.AbstractWrapper$$Lambda$798.831344888
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 89 more

附加信息

[wenshao]

这个问题升级到2.0.29应该就好了，你试试看

[javaHBZ]

还是会出现这个问题

[wenshao]

AbstractWrapper这个类的代码能提供下么？

[wenshao]

https://oss.sonatype.org/content/repositories/snapshots/com/alibaba/fastjson2/fastjson2/2.0.30-SNAPSHOT/
问题已经修复，请帮忙用2.0.30-SNAPSHOT版本验证，2.0.30版本预计在5月9日前发布

[javaHBZ]

/*

• Copyright (c) 2011-2020, baomidou (jobob@qq.com).
• Licensed under the Apache License, Version 2.0 (the "License"); you may not
• use this file except in compliance with the License. You may obtain a copy of
• the License at
• https://www.apache.org/licenses/LICENSE-2.0
• Unless required by applicable law or agreed to in writing, software
• distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
• WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
• License for the specific language governing permissions and limitations under
• the License.
  */
  package com.baomidou.mybatisplus.core.conditions;

import com.baomidou.mybatisplus.core.conditions.interfaces.Compare;
import com.baomidou.mybatisplus.core.conditions.interfaces.Func;
import com.baomidou.mybatisplus.core.conditions.interfaces.Join;
import com.baomidou.mybatisplus.core.conditions.interfaces.Nested;
import com.baomidou.mybatisplus.core.conditions.segments.MergeSegments;
import com.baomidou.mybatisplus.core.enums.SqlKeyword;
import com.baomidou.mybatisplus.core.enums.SqlLike;
import com.baomidou.mybatisplus.core.toolkit.*;
import com.baomidou.mybatisplus.core.toolkit.sql.SqlUtils;
import com.baomidou.mybatisplus.core.toolkit.sql.StringEscape;

import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.BiPredicate;
import java.util.function.Consumer;

import static com.baomidou.mybatisplus.core.enums.SqlKeyword.*;
import static com.baomidou.mybatisplus.core.enums.WrapperKeyword.APPLY;
import static com.baomidou.mybatisplus.core.enums.WrapperKeyword.BRACKET;
import static java.util.stream.Collectors.joining;

/**

• 查询条件封装

• @author hubin miemie HCL

• @SInCE 2017-05-26
  */
  @SuppressWarnings({"serial", "unchecked"})
  public abstract class AbstractWrapper<T, R, Children extends AbstractWrapper<T, R, Children>> extends Wrapper
  implements Compare<Children, R>, Nested<Children, Children>, Join, Func<Children, R> {

  /**

  • 占位符
    /
    protected final Children typedThis = (Children) this;
    /*
  • 必要度量
    /
    protected AtomicInteger paramNameSeq;
    protected Map<String, Object> paramNameValuePairs;
    protected SharedString lastSql;
    /*
  • SQL注释
    /
    protected SharedString sqlComment;
    /*
  • SQL起始语句
    /
    protected SharedString sqlFirst;
    /*
  • ß
  • 数据库表映射实体类
    /
    private T entity;
    protected MergeSegments expression;
    /*
  • 实体类型(主要用于确定泛型以及取TableInfo缓存)
    */
    private Class entityClass;

  @OverRide
  public T getEntity() {
  return entity;
  }

  public Children setEntity(T entity) {
  this.entity = entity;
  return typedThis;
  }

  protected Class getEntityClass() {
  if (entityClass == null && entity != null) {
  entityClass = (Class) entity.getClass();
  }
  return entityClass;
  }

  public Children setEntityClass(Class entityClass) {
  if (entityClass != null) {
  this.entityClass = entityClass;
  }
  return typedThis;
  }

  @OverRide
  public Children allEq(boolean condition, Map<R, V> params, boolean null2IsNull) {
  if (condition && CollectionUtils.isNotEmpty(params)) {
  params.forEach((k, v) -> {
  if (StringUtils.checkValNotNull(v)) {
  eq(k, v);
  } else {
  if (null2IsNull) {
  isNull(k);
  }
  }
  });
  }
  return typedThis;
  }

  @OverRide
  public Children allEq(boolean condition, BiPredicate<R, V> filter, Map<R, V> params, boolean null2IsNull) {
  if (condition && CollectionUtils.isNotEmpty(params)) {
  params.forEach((k, v) -> {
  if (filter.test(k, v)) {
  if (StringUtils.checkValNotNull(v)) {
  eq(k, v);
  } else {
  if (null2IsNull) {
  isNull(k);
  }
  }
  }
  });
  }
  return typedThis;
  }

  @OverRide
  public Children eq(boolean condition, R column, Object val) {
  return addCondition(condition, column, EQ, val);
  }

  @OverRide
  public Children ne(boolean condition, R column, Object val) {
  return addCondition(condition, column, NE, val);
  }

  @OverRide
  public Children gt(boolean condition, R column, Object val) {
  return addCondition(condition, column, GT, val);
  }

  @OverRide
  public Children ge(boolean condition, R column, Object val) {
  return addCondition(condition, column, GE, val);
  }

  @OverRide
  public Children lt(boolean condition, R column, Object val) {
  return addCondition(condition, column, LT, val);
  }

  @OverRide
  public Children le(boolean condition, R column, Object val) {
  return addCondition(condition, column, LE, val);
  }

  @OverRide
  public Children like(boolean condition, R column, Object val) {
  return likeValue(condition, column, val, SqlLike.DEFAULT);
  }

  @OverRide
  public Children notLike(boolean condition, R column, Object val) {
  return not(condition).like(condition, column, val);
  }

  @OverRide
  public Children likeLeft(boolean condition, R column, Object val) {
  return likeValue(condition, column, val, SqlLike.LEFT);
  }

  @OverRide
  public Children likeRight(boolean condition, R column, Object val) {
  return likeValue(condition, column, val, SqlLike.RIGHT);
  }

  @OverRide
  public Children between(boolean condition, R column, Object val1, Object val2) {
  return doIt(condition, () -> columnToString(column), BETWEEN, () -> formatSql("{0}", val1), AND,
  () -> formatSql("{0}", val2));
  }

  @OverRide
  public Children notBetween(boolean condition, R column, Object val1, Object val2) {
  return not(condition).between(condition, column, val1, val2);
  }

  @OverRide
  public Children and(boolean condition, Consumer consumer) {
  return and(condition).addNestedCondition(condition, consumer);
  }

  @OverRide
  public Children or(boolean condition, Consumer consumer) {
  return or(condition).addNestedCondition(condition, consumer);
  }

  @OverRide
  public Children nested(boolean condition, Consumer consumer) {
  return addNestedCondition(condition, consumer);
  }

  @OverRide
  public Children or(boolean condition) {
  return doIt(condition, OR);
  }

  @OverRide
  public Children apply(boolean condition, String applySql, Object... value) {
  return doIt(condition, APPLY, () -> formatSql(applySql, value));
  }

  @OverRide
  public Children last(boolean condition, String lastSql) {
  if (condition) {
  this.lastSql.setStringValue(StringPool.SPACE + lastSql);
  }
  return typedThis;
  }

  @OverRide
  public Children comment(boolean condition, String comment) {
  if (condition) {
  this.sqlComment.setStringValue(comment);
  }
  return typedThis;
  }

  @OverRide
  public Children first(boolean condition, String firstSql) {
  if (condition) {
  this.sqlFirst.setStringValue(firstSql);
  }
  return typedThis;
  }

  @OverRide
  public Children exists(boolean condition, String existsSql) {
  return doIt(condition, EXISTS, () -> String.format("(%s)", existsSql));
  }

  @OverRide
  public Children notExists(boolean condition, String notExistsSql) {
  return not(condition).exists(condition, notExistsSql);
  }

  @OverRide
  public Children isNull(boolean condition, R column) {
  return doIt(condition, () -> columnToString(column), IS_NULL);
  }

  @OverRide
  public Children isNotNull(boolean condition, R column) {
  return doIt(condition, () -> columnToString(column), IS_NOT_NULL);
  }

  @OverRide
  public Children in(boolean condition, R column, Collection<?> coll) {
  return doIt(condition, () -> columnToString(column), IN, inExpression(coll));
  }

  @OverRide
  public Children notIn(boolean condition, R column, Collection<?> coll) {
  return not(condition).in(condition, column, coll);
  }

  @OverRide
  public Children inSql(boolean condition, R column, String inValue) {
  return doIt(condition, () -> columnToString(column), IN, () -> String.format("(%s)", inValue));
  }

  @OverRide
  public Children notInSql(boolean condition, R column, String inValue) {
  return not(condition).inSql(condition, column, inValue);
  }

  @OverRide
  public Children groupBy(boolean condition, R... columns) {
  if (ArrayUtils.isEmpty(columns)) {
  return typedThis;
  }
  return doIt(condition, GROUP_BY,
  () -> columns.length == 1 ? columnToString(columns[0]) : columnsToString(columns));
  }

  @OverRide
  public Children orderBy(boolean condition, boolean isAsc, R... columns) {
  if (ArrayUtils.isEmpty(columns)) {
  return typedThis;
  }
  SqlKeyword mode = isAsc ? ASC : DESC;
  for (R column : columns) {
  doIt(condition, ORDER_BY, () -> columnToString(column), mode);
  }
  return typedThis;
  }

  @OverRide
  public Children having(boolean condition, String sqlHaving, Object... params) {
  return doIt(condition, HAVING, () -> formatSqlIfNeed(condition, sqlHaving, params));
  }

  @OverRide
  public Children func(boolean condition, Consumer consumer) {
  if (condition) {
  consumer.accept(typedThis);
  }
  return typedThis;
  }

  /**

  • 内部自用

  • NOT 关键词

  */
  protected Children not(boolean condition) {
  return doIt(condition, NOT);
  }

  /**

  • 内部自用

  • 拼接 AND

  */
  protected Children and(boolean condition) {
  return doIt(condition, AND);
  }

  /**

  • 内部自用

  • 拼接 LIKE 以及 值

  */
  protected Children likeValue(boolean condition, R column, Object val, SqlLike sqlLike) {
  return doIt(condition, () -> columnToString(column), LIKE, () -> formatSql("{0}", SqlUtils.concatLike(val, sqlLike)));
  }

  /**

  • 普通查询条件
  • @param condition 是否执行
  • @param column 属性
  • @param sqlKeyword SQL 关键词
  • @param val 条件值
    */
    protected Children addCondition(boolean condition, R column, SqlKeyword sqlKeyword, Object val) {
    return doIt(condition, () -> columnToString(column), sqlKeyword, () -> formatSql("{0}", val));
    }

  /**

  • 多重嵌套查询条件
  • @param condition 查询条件值
    */
    protected Children addNestedCondition(boolean condition, Consumer consumer) {
    if (condition) {
    final Children instance = instance();
    consumer.accept(instance);
    return doIt(true, BRACKET, instance);
    }
    return typedThis;
    }

  /**

  • 子类返回一个自己的新对象
    */
    protected abstract Children instance();

  /**

  • 格式化SQL
  • @param sqlStr SQL语句部分
  • @param params 参数集
  • @return sql
    */
    protected final String formatSql(String sqlStr, Object... params) {
    return formatSqlIfNeed(true, sqlStr, params);
    }

  /**

  • 根据需要格式化SQL
    
  • 
    
  • Format SQL for methods: EntityQ.where/and/or...("name={0}", value);
  • ALL the {i} will be replaced with #{MPGENVALi}
    
  • 
    
  • ew.where("sample_name={0}", "haha").and("sample_age >{0}
  • and sample_age<{1}", 18, 30) TO
  • sample_name=#{MPGENVAL1} and sample_age>#{MPGENVAL2} and
  • sample_age<#{MPGENVAL3}
    
  • @param need 是否需要格式化
  • @param sqlStr SQL语句部分
  • @param params 参数集
  • @return sql
    */
    protected final String formatSqlIfNeed(boolean need, String sqlStr, Object... params) {
    if (!need || StringUtils.isBlank(sqlStr)) {
    return null;
    }
    if (ArrayUtils.isNotEmpty(params)) {
    for (int i = 0; i < params.length; ++i) {
    String genParamName = Constants.WRAPPER_PARAM + paramNameSeq.incrementAndGet();
    sqlStr = sqlStr.replace(String.format("{%s}", i),
    String.format(Constants.WRAPPER_PARAM_FORMAT, Constants.WRAPPER, genParamName));
    paramNameValuePairs.put(genParamName, params[i]);
    }
    }
    return sqlStr;
    }

  /**

  • 获取in表达式 包含括号
  • @param value 集合
    */
    private ISqlSegment inExpression(Collection<?> value) {
    return () -> value.stream().map(i -> formatSql("{0}", i))
    .collect(joining(StringPool.COMMA, StringPool.LEFT_BRACKET, StringPool.RIGHT_BRACKET));
    }

  /**

  • 必要的初始化
    */
    protected void initNeed() {
    paramNameSeq = new AtomicInteger(0);
    paramNameValuePairs = new HashMap<>(16);
    expression = new MergeSegments();
    lastSql = SharedString.emptyString();
    sqlComment = SharedString.emptyString();
    sqlFirst = SharedString.emptyString();
    }

  @OverRide
  public void clear() {
  entity = null;
  paramNameSeq.set(0);
  paramNameValuePairs.clear();
  expression.clear();
  lastSql.toEmpty();
  sqlComment.toEmpty();
  sqlFirst.toEmpty();
  }

  /**

  • 对sql片段进行组装
  • @param condition 是否执行
  • @param sqlSegments sql片段数组
  • @return children
    */
    protected Children doIt(boolean condition, ISqlSegment... sqlSegments) {
    if (condition) {
    expression.add(sqlSegments);
    }
    return typedThis;
    }

  @OverRide
  public String getSqlSegment() {
  return expression.getSqlSegment() + lastSql.getStringValue();
  }

  @OverRide
  public String getSqlComment() {
  if (StringUtils.isNotBlank(sqlComment.getStringValue())) {
  return "/" + StringEscape.escapeRawString(sqlComment.getStringValue()) + "/";
  }
  return null;
  }

  @OverRide
  public String getSqlFirst() {
  if (StringUtils.isNotBlank(sqlFirst.getStringValue())) {
  return StringEscape.escapeRawString(sqlFirst.getStringValue());
  }
  return null;
  }

  @OverRide
  public MergeSegments getExpression() {
  return expression;
  }

  public Map<String, Object> getParamNameValuePairs() {
  return paramNameValuePairs;
  }

  /**

  • 获取 columnName
    */
    protected String columnToString(R column) {
    return (String) column;
    }

  /**

  • 多字段转换为逗号 "," 分割字符串
  • @param columns 多字段
    */
    protected String columnsToString(R... columns) {
    return Arrays.stream(columns).map(this::columnToString).collect(joining(StringPool.COMMA));
    }

  @OverRide
  @SuppressWarnings("all")
  public Children clone() {
  return SerializationUtils.clone(typedThis);
  }
  }

[javaHBZ]

好的 我去试试

[javaHBZ]

出现了新的问题,我用的包的名称是 fastjson2-2.0.30-20230429.115149-8.jar

报错信息

 ### Error querying database.  Cause: com.alibaba.fastjson2.JSONException: JSON#toJSONString cannot serialize 'MyBatisSQLMonitorPlugin.SqlParamWrapper(param={ew=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@747910e4, param1=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@747910e4})'
### Cause: com.alibaba.fastjson2.JSONException: JSON#toJSONString cannot serialize 'MyBatisSQLMonitorPlugin.SqlParamWrapper(param={ew=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@747910e4, param1=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@747910e4})'
	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:96) ~[mybatis-spring-2.0.6.jar:2.0.6]
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:441) ~[mybatis-spring-2.0.6.jar:2.0.6]
	at com.sun.proxy.$Proxy80.selectList(Unknown Source) ~[na:na]
	at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:224) ~[mybatis-spring-2.0.6.jar:2.0.6]
	at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.executeForMany(MybatisMapperMethod.java:166) ~[mybatis-plus-core-3.5.2.jar:3.5.2]
	at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:77) ~[mybatis-plus-core-3.5.2.jar:3.5.2]
	at com.baomidou.mybatisplus.core.override.MybatisMapperProxy$PlainMethodInvoker.invoke(MybatisMapperProxy.java:148) ~[mybatis-plus-core-3.5.2.jar:3.5.2]
	at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:89) ~[mybatis-plus-core-3.5.2.jar:3.5.2]
	at com.sun.proxy.$Proxy82.selectList(Unknown Source) ~[na:na]
	at com.baomidou.mybatisplus.extension.service.IService.list(IService.java:370) ~[mybatis-plus-extension-3.5.2.jar:3.5.2]
	at com.baomidou.mybatisplus.extension.service.IService.list(IService.java:379) ~[mybatis-plus-extension-3.5.2.jar:3.5.2]
	at org.beite.service.impl.ArticleCategoryServiceImpl.listAllCategories(ArticleCategoryServiceImpl.java:27) ~[classes/:na]
	at org.beite.service.impl.ArticleCategoryServiceImpl$$FastClassBySpringCGLIB$$f29cc435.invoke(<generated>) ~[classes/:na]
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.3.20.jar:5.3.20]
	at org.springframework.aop.framework.CglibAopProxy.invokeMethod(CglibAopProxy.java:386) ~[spring-aop-5.3.20.jar:5.3.20]
	at org.springframework.aop.framework.CglibAopProxy.access$000(CglibAopProxy.java:85) ~[spring-aop-5.3.20.jar:5.3.20]
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:704) ~[spring-aop-5.3.20.jar:5.3.20]
	at org.beite.service.impl.ArticleCategoryServiceImpl$$EnhancerBySpringCGLIB$$648b3ea8.listAllCategories(<generated>) ~[classes/:na]
	at org.beite.controller.article.ArticleCategoryController.getAllCategories(ArticleCategoryController.java:29) ~[classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) [spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) [spring-webmvc-5.3.20.jar:5.3.20]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) [tomcat-embed-core-9.0.63.jar:4.0.FR]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) [spring-webmvc-5.3.20.jar:5.3.20]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) [tomcat-embed-core-9.0.63.jar:4.0.FR]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.beite.common.filter.AuthorizeAttributeFilter.doFilter(AuthorizeAttributeFilter.java:87) [classes/:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) [spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) [spring-web-5.3.20.jar:5.3.20]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]

[wenshao]

是不是没有把rootCause发出来，错误堆栈中没看到fastjson的。没有rootCause的堆栈，不好诊断问题

[javaHBZ]

nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: com.alibaba.fastjson2.JSONException: JSON#toJSONString cannot serialize 'MyBatisSQLMonitorPlugin.SqlParamWrapper(param={ew=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946, param1=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946})'
### Cause: com.alibaba.fastjson2.JSONException: JSON#toJSONString cannot serialize 'MyBatisSQLMonitorPlugin.SqlParamWrapper(param={ew=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946, param1=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946})'】

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: com.alibaba.fastjson2.JSONException: JSON#toJSONString cannot serialize 'MyBatisSQLMonitorPlugin.SqlParamWrapper(param={ew=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946, param1=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946})'
### Cause: com.alibaba.fastjson2.JSONException: JSON#toJSONString cannot serialize 'MyBatisSQLMonitorPlugin.SqlParamWrapper(param={ew=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946, param1=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946})'
	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:96) ~[mybatis-spring-2.0.6.jar:2.0.6]
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:441) ~[mybatis-spring-2.0.6.jar:2.0.6]
	at com.sun.proxy.$Proxy80.selectList(Unknown Source) ~[na:na]
	at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:224) ~[mybatis-spring-2.0.6.jar:2.0.6]
	at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.executeForMany(MybatisMapperMethod.java:166) ~[mybatis-plus-core-3.5.2.jar:3.5.2]
	at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:77) ~[mybatis-plus-core-3.5.2.jar:3.5.2]
	at com.baomidou.mybatisplus.core.override.MybatisMapperProxy$PlainMethodInvoker.invoke(MybatisMapperProxy.java:148) ~[mybatis-plus-core-3.5.2.jar:3.5.2]
	at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:89) ~[mybatis-plus-core-3.5.2.jar:3.5.2]
	at com.sun.proxy.$Proxy86.selectList(Unknown Source) ~[na:na]
	at com.baomidou.mybatisplus.extension.service.IService.list(IService.java:370) ~[mybatis-plus-extension-3.5.2.jar:3.5.2]
	at com.baomidou.mybatisplus.extension.service.IService.list(IService.java:379) ~[mybatis-plus-extension-3.5.2.jar:3.5.2]
	at org.beite.service.impl.ArticleTagsServiceImpl.listTags(ArticleTagsServiceImpl.java:53) ~[classes/:na]
	at org.beite.service.impl.ArticleTagsServiceImpl$$FastClassBySpringCGLIB$$a9f6dd3a.invoke(<generated>) ~[classes/:na]
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.3.20.jar:5.3.20]
	at org.springframework.aop.framework.CglibAopProxy.invokeMethod(CglibAopProxy.java:386) ~[spring-aop-5.3.20.jar:5.3.20]
	at org.springframework.aop.framework.CglibAopProxy.access$000(CglibAopProxy.java:85) ~[spring-aop-5.3.20.jar:5.3.20]
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:704) ~[spring-aop-5.3.20.jar:5.3.20]
	at org.beite.service.impl.ArticleTagsServiceImpl$$EnhancerBySpringCGLIB$$f7a8bfb.listTags(<generated>) ~[classes/:na]
	at org.beite.controller.article.ArticleTagsController.getListTags(ArticleTagsController.java:30) ~[classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) [spring-webmvc-5.3.20.jar:5.3.20]
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) [spring-webmvc-5.3.20.jar:5.3.20]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) [tomcat-embed-core-9.0.63.jar:4.0.FR]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) [spring-webmvc-5.3.20.jar:5.3.20]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) [tomcat-embed-core-9.0.63.jar:4.0.FR]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.beite.common.filter.AuthorizeAttributeFilter.doFilter(AuthorizeAttributeFilter.java:87) [classes/:na]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) [spring-web-5.3.20.jar:5.3.20]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) [spring-web-5.3.20.jar:5.3.20]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.63.jar:9.0.63]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]
Caused by: org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: com.alibaba.fastjson2.JSONException: JSON#toJSONString cannot serialize 'MyBatisSQLMonitorPlugin.SqlParamWrapper(param={ew=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946, param1=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946})'
### Cause: com.alibaba.fastjson2.JSONException: JSON#toJSONString cannot serialize 'MyBatisSQLMonitorPlugin.SqlParamWrapper(param={ew=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946, param1=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946})'
	at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30) ~[mybatis-3.5.6.jar:3.5.6]
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:149) ~[mybatis-3.5.6.jar:3.5.6]
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140) ~[mybatis-3.5.6.jar:3.5.6]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:427) ~[mybatis-spring-2.0.6.jar:2.0.6]
	... 62 common frames omitted
Caused by: com.alibaba.fastjson2.JSONException: JSON#toJSONString cannot serialize 'MyBatisSQLMonitorPlugin.SqlParamWrapper(param={ew=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946, param1=com.baomidou.mybatisplus.core.toolkit.Wrappers$EmptyWrapper@4de45946})'
	at com.alibaba.fastjson2.JSON.toJSONString(JSON.java:2339) ~[fastjson2-2.0.30-20230429.115149-8.jar:na]
	at org.beite.common.handler.MyBatisSQLMonitorPlugin.intercept(MyBatisSQLMonitorPlugin.java:81) ~[classes/:na]
	at org.beite.common.handler.SQLMonitorPlugin.beforeQuery(SQLMonitorPlugin.java:42) ~[classes/:na]
	at com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor.intercept(MybatisPlusInterceptor.java:78) ~[mybatis-plus-extension-3.5.2.jar:3.5.2]
	at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61) ~[mybatis-3.5.6.jar:3.5.6]
	at com.sun.proxy.$Proxy102.query(Unknown Source) ~[na:na]
	at com.github.pagehelper.PageInterceptor.intercept(PageInterceptor.java:132) ~[pagehelper-5.3.0.jar:na]
	at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61) ~[mybatis-3.5.6.jar:3.5.6]
	at com.sun.proxy.$Proxy102.query(Unknown Source) ~[na:na]
	at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147) ~[mybatis-3.5.6.jar:3.5.6]
	... 68 common frames omitted
Caused by: java.lang.NullPointerException: null
	at com.baomidou.mybatisplus.core.conditions.Wrapper.getTargetSql(Wrapper.java:173) ~[mybatis-plus-core-3.5.2.jar:3.5.2]
	at com.alibaba.fastjson2.writer.FieldWriterStringFunc.write(FieldWriterStringFunc.java:41) ~[fastjson2-2.0.30-20230429.115149-8.jar:na]
	at com.alibaba.fastjson2.writer.ObjectWriterAdapter.write(ObjectWriterAdapter.java:303) ~[fastjson2-2.0.30-20230429.115149-8.jar:na]
	at com.alibaba.fastjson2.writer.ObjectWriterImplMap.write(ObjectWriterImplMap.java:548) ~[fastjson2-2.0.30-20230429.115149-8.jar:na]
	at com.alibaba.fastjson2.writer.FieldWriterObject.write(FieldWriterObject.java:327) ~[fastjson2-2.0.30-20230429.115149-8.jar:na]
	at com.alibaba.fastjson2.writer.ObjectWriter1.write(ObjectWriter1.java:68) ~[fastjson2-2.0.30-20230429.115149-8.jar:na]
	at com.alibaba.fastjson2.JSON.toJSONString(JSON.java:2334) ~[fastjson2-2.0.30-20230429.115149-8.jar:na]
	... 77 common frames omitted

[wenshao]

加上JSONWriter.Feature.IgnoreErrorGetter试试看，比如：

JSON.toJSONString(object, JSONWriter.Feature.IgnoreErrorGetter);

[wenshao]

全局配置：

JSON.config(JSONWriter.Feature.IgnoreErrorGetter);

或者更新下快照，看下新版本是否会不加也不报错

做了这个处理：
8fd9d6d

[javaHBZ]

好的

[javaHBZ]

问题已经解决了,不加也可以,使用的快照版本是 fastjson2-2.0.30-20230429.134008-9.jar