题主，解决了吗

解决了吗，我也遇到同样的问题了

应该是你的配置文件不对，没能识别@autowired注解

No default constructor found,你自己写了一个构造器,

public InjectionServiceImpl(InjectionDAO injectionDAO) {

this.injectionDAO = injectionDAO;

}

并且将注解注释掉了,java你自己谢了构造器他就不会生成默认的构造器,所以找不到了

@Autowired是对成员变量和函数，构造方法进行标注，完成自动装配，被你注释掉了

提示：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'injectionServiceImpl' defined in file [C:\Users\***\workspaceEE\springtest\bin\beanannotation\injection\service\InjectionServiceImpl.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [beanannotation.injection.service.InjectionServiceImpl]: No default constructor found; nested exception is java.lang.NoSuchMethodException: beanannotation.injection.service.InjectionServiceImpl.<init>()