Spring中的一个错误：使用Resources时报错（The annotation @Resources is disallowed for this location）

 1 package com.show.biz;
 2 
 3 import javax.annotation.Resources;
 4 
 5 import com.show.biz.UserBiz;
 6 import com.show.dao.UserDAO;
 7 
 8 public class UserBizImplByAnnotationOfResource implements UserBiz {
 9 
10     //将注解标注在userDAO上
11     @Resources(name="userDAO") //或者直接使用@Resources
12     UserDAO userDAO;
13     
14     //将注解标注在userDAo的set方法上
15     @Resources(name="userDAO")
16     public void setUserDAO(UserDAO userDAo){
17         this.userDAO = userDAo;
18     }
19     
20     public boolean login(String username, String password) {
21         
22         return userDAO.login(username, password);
23     }
24 
25 }

package com.show.biz;

import javax.annotation.Resource;
import javax.annotation.Resources;

import com.show.biz.UserBiz;
import com.show.dao.UserDAO;

public class UserBizImplByAnnotationOfResource implements UserBiz {

    //将注解标注在userDAO上
    @Resource(name="userDAO") //或者直接使用@Resources
    UserDAO userDAO;
    
    //将注解标注在userDAo的set方法上
    @Resource(name="userDAO")
    public void setUserDAO(UserDAO userDAo){
        this.userDAO = userDAo;
    }
    
    public boolean login(String username, String password) {
        
        return userDAO.login(username, password);
    }

}