java.lang.NoClassDefFoundError: orgspringframeworkdaosupportDaoSupport

错误描述：练习springboot整合mybatis时添加mybatis 与 mysql的依赖后，启动服务报错。

报错信息：

java.lang.NoClassDefFoundError: org/springframework/dao/support/DaoSupport at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:467) at java.net.URLClassLoader.access$100(URLClassLoader.java:73) at java.net.URLClassLoader$1.run(URLClassLoader.java:368) at java.net.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:361) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.ClassLoader.defineClass1(Native Method)

解决办法：在网上查到说是缺少了spring.tx的jar包 添加如下jar包

<dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>3.0.5.RELEASE</version> </dependency>

又出现错误：Caused by: java.lang.IllegalStateException: No persistence exception translators found in bean factory. Cannot perform exception translation.

出错原因：jar包版本不对

解决办法：

<dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>4.3.18.RELEASE</version> </dependency>

问题解决！