本文共 2663 字，大约阅读时间需要 8 分钟。

一.普通属性注入

配置文件：

-->    
       
           
            
            
        
   

实现类：

public class UserServiceImpl implements UserService {    private String userName;    private  String password;    public void setUserName(String userName) {        this.userName = userName;    }    public void setPassword(String password) {        this.password = password;    }    private UserDao ud;    //有参数构造函数    public UserServiceImpl(UserDao ud) {        this.ud = ud;    }    //无参构造函数    public UserServiceImpl() {    }    /**    public void setUd(UserDao ud) {        this.ud = ud;    }     **/    public int addUser() {        System.out.println("uname:"+userName+"pasword:"+password);        return ud.addUser();    }

调用类：

二.集合的注入

1.配置文件

       
           
            
            
           
               
                    
      
       liu
                     
      
       jian
                     
      
       fu
                 
            
            
                
             
        
       
           
            
        
       
           
            
        
   

2.service层

package com.ljf.spring.demo.ioc.service.impl;import com.ljf.spring.demo.ioc.bean.User;import com.ljf.spring.demo.ioc.dao.UserDao;import com.ljf.spring.demo.ioc.service.UserService;import java.util.List;import java.util.Map;/** * @ClassName: UserServiceImpl * @Description: TODO * @Author: liujianfu * @Date: 2021/01/03 11:19:57  * @Version: V1.0 **/public class UserServiceImpl implements UserService {    private List
   
     strNameList;    private Map
    
      userMap;    public List
     
       getStrNameList() {        return strNameList;    }    public void setStrNameList(List
      
        strNameList) {        this.strNameList = strNameList;    }    public Map
       
         getUserMap() {        return userMap;    }    public void setUserMap(Map
        
          userMap) { this.userMap = userMap; } private String userName; private String password; public void setUserName(String userName) { this.userName = userName; } public void setPassword(String password) { this.password = password; } private UserDao ud; //有参数构造函数 public UserServiceImpl(UserDao ud) { this.ud = ud; } //无参构造函数 public UserServiceImpl() { } /** public void setUd(UserDao ud) { this.ud = ud; } **/ public int addUser() { System.out.println("uname:"+userName+"pasword:"+password); System.out.println("strlist:"+strNameList.toString()); System.out.println("map:"); for(String key:userMap.keySet()){ System.out.println("u:"+userMap.get(key).getName()+">>>:"+userMap.get(key).getAge()); } return ud.addUser(); }}
        
       
      
     
    
   

3.调用：

三.引用数据类型注入

转载地址：http://beuzz.baihongyu.com/