The type org.springframework.dao.support.DaoSupport cannot be resolved. It is indirectly referenced

在继承SqlSessionDaoSupport出现了两个错误：
The project was not built since its build path is incomplete. Cannot find the class file for org.springframework.dao.support.DaoSupport. Fix the build path then try building this project。

The type org.springframework.dao.support.DaoSupport cannot be resolved. It is indirectly referenced from required .class files。
刚开始还以为是什么jre的问题，在configuration里面各种调，然后重新编译报错了，又以为是版本库的问题，然后看别人的博客才发现是少了jar包
加入spring-tx.jar包依赖：

<dependency>
     <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${org.springframework.version}</version>
</dependency>