[心得笔记]spring常用的三种依赖注入方式

 public class Test1 {  
    private MessageInterface message;  
    @Autowired //构造器注入  
    private Test1(MessageInterface message) {  
        this.message = message;  
    }
    //省略getter和setter  
  }

 public class Test1 {  

    private MessageInterface message;  

    @Autowired //构造器注入  

    private Test1(MessageInterface message) {  

        this.message = message;  

    }

    //省略getter和setter  

  }

 public class Test2 {  
    @Autowired //接口注入  
    private MessageInterface messageInterface;  
    //省略getter和setter  
} 

 public class Test2 {  

    @Autowired //接口注入  

    private MessageInterface messageInterface;  

    //省略getter和setter  

} 

public class Test3 {  
    private MessageInterface message;  
 
    @Autowired //setter方法注入  
    public void setMessage(MessageInterface message) {  
        this.message = message;  
    }  
    public String getMessage() {  
        return message;  
    }  
}

public class Test3 {  

    private MessageInterface message;  

    @Autowired //setter方法注入  

    public void setMessage(MessageInterface message) {  

        this.message = message;  

    }  

    public String getMessage() {  

        return message;  

    }  

}

public class Test4 {  
    private MessageInterface message; //
    private List<String> list;  
    @Autowired(required = true) //任意一个或多个参数方法注入  
    private void initMessage(MessageInterface message, ArrayList<String> list) {  
        this.message = message;  
        this.list = list;  
    }  
    //省略getter和setter  
} 

public class Test4 {  

    private MessageInterface message; //

    private List<String> list;  

    @Autowired(required = true) //任意一个或多个参数方法注入  

    private void initMessage(MessageInterface message, ArrayList<String> list) {  

        this.message = message;  

        this.list = list;  

    }  

    //省略getter和setter  

}