ssm出问题不知道怎么解决，bean属性“userMapper”不可写或具有无效的setter方法。setter的参数类型与getter的返回类型匹配吗？

Question

17-Nov-2021 12:41:15.951 严重 [RMI TCP Connection(3)-127.0.0.1] org.springframework.web.servlet.FrameworkServlet.initServletBean Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'UserServiceImpl' defined in class path resource [spring-service.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'userMapper' of bean class [com.ml.service.UserServiceImpl]: Bean property 'userMapper' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

2021年11月17日12:41:15.951严重 [RMI TCP连接（3）-127.0.0.1]org.springframework.web.servlet.FrameworkServlet.initServletBean上下文初始化失败

org.springframework.beans.factory.BeanCreationException:创建名为“UserServiceImpl”的bean时出错，该bean在类路径资源[spring service.xml]中定义：设置属性值时出错；嵌套异常为org.springframework.beans.NotWritablePropertyException:bean类[com.ml.service.UserServiceImpl]的属性“userMapper”无效：bean属性“userMapper”不可写或具有无效的setter方法。setter的参数类型与getter的返回类型匹配吗？

Answer 1

spring初始化，在进行依赖注入时，对UserServicelmpl这个类下面依赖的UserMapper注入失败，这个应该是你注入时候指定的这个类的名字，不是根据类型注入的