报错信息：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'demoController': Unsatisfied dependency expressed through field 'stasticService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'stasticServiceImpl': Unsatisfied dependency expressed through field 'stasticMapper'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'stasticMapper' defined in file [E:\jq\grid-governance-service\build\classes\java\main\com\jiuqi\governance\grid\dao\mapper\StasticMapper.class]: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for com.jiuqi.governance.grid.dao.mapper.StasticMapper.getList. please check com/jiuqi/governance/grid/dao/mapper/StasticMapper.java (best guess) and com/jiuqi/governance/grid/dao/mapper/StasticMapper.java (best guess)

截图信息：

1、在启动springboot项目过程中突然报了个错，按照错误信息查找原因，各种的原因都有。但是并没有解决。突然发现看到了在@Mapper类中有两个名称相同的方法，重载。于是按照这个情况查找了一下。找到了原因：在使用@Select等注解的情况下，方法名即为mapper的id，id相同。重载的方法会报这个错。（博主是一点、一点的把代码添加进去。笑哭！！才找到了是哪段代码出现问题）
2、解决办法，将其中一个方法名称进行修改。项目可以正常启动。

总结：不能只会注解的使用，要把注解的原理弄明白，这次就吃了这么的亏，不说了 看@Mapper是怎么实现的去了。