mysql查询报错：java.lang.ClassCastException: java.time.LocalDateTime cannot be cast to java.util.Date

目录

• • 环境
  • 场景
  • 报错信息
  • 原因
  • 解决
  • • 补充

环境

数据库版本：Mysql5.7

数据库链接驱动jar包：mysql-connector-java-8.0.26.jar

场景

当select语句查询日期类型的字段，在映射结果对象时报错

报错信息

java.lang.ClassCastException: java.time.LocalDateTime cannot be cast to java.util.Dateat com.xxx.dao.AuthTokenDao.find(AuthTokenDao.java:40)at com.xxx.Listener.MyNewListener.contextInitialized(MyNewListener.java:317)at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4716)at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5177)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:717)at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:690)at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:706)at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1133)at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1866)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at org.apache.Tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1045)at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:429)at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1576)at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:309)at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:423)at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:366)at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:936)at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:843)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1384)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1374)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:909)at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:262)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)at org.apache.catalina.core.StandardService.startInternal(StandardService.java:421)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)at org.apache.catalina.startup.Catalina.start(Catalina.java:772)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.apache.catalina.startup.Bootstrap.start(Bootstrap.java:342)at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:473)

原因

通过百度，说是mysql-connector-java-8.0.22.jar以上版本的mysql依赖，返回的日期类型就是LocalDataTime，并且在强转时会报错（未确认）

解决

将高于8.0.22以上的版本的mysql驱动更换为mysql-connector-java-8.0.22.jar或更为早期的版本

补充

mysql-connector-java-8.0.22.jar是兼容mysql5和mysql8数据库的，在查询日期类型的字段时可以正常映射结果类

mysql-connector-java-8.0.22.jarpom.xml坐标如下

<dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.22</version></dependency>

来源地址：https://blog.csdn.net/weixin_52116015/article/details/131557361