首页 > 编程语言 > 详细

Spring各种类型变量set依赖注入的方法

时间:2021-08-08 23:04:25      阅读:20      评论:0      收藏:0      [点我收藏+]

一、依赖注入的两种方式:构造器注入和set注入。今天我们来说的就是set注入方式。

首先推荐Spring的中文文档链接:https://www.docs4dev.com/docs/zh/spring-framework/5.1.3.RELEASE/reference

下面所记录的文档中都有详细的介绍,但是个人感觉文档缺点就是记录的太过于杂乱。

 

package com.ly.pojo;

import java.util.*;

public class Student {
//字符串类型
private String name;
//Bean类型
private Address address;
//数组类型
private String[] book;
//列表类型
private List<String> hobbies;
//Map类型
private Map<String,String> card;
//Set类型
private Set<String> games;
//空类型
private String wife;
//properties类型
private Properties iinfo; public String getName() { return name; } public void setName(String name) { this.name = name; } public Address getAddress() { return address; } public void setAddress(Address address) { this.address = address; } public String[] getBook() { return book; } public void setBook(String[] book) { this.book = book; } public List<String> getHobbies() { return hobbies; } public void setHobbies(List<String> hobbies) { this.hobbies = hobbies; } public Map<String, String> getCard() { return card; } public void setCard(Map<String, String> card) { this.card = card; } public Set<String> getGames() { return games; } public void setGames(Set<String> games) { this.games = games; } public String getWife() { return wife; } public void setWife(String wife) { this.wife = wife; } public Properties getIinfo() { return iinfo; } public void setIinfo(Properties iinfo) { this.iinfo = iinfo; } @Override public String toString() { return "Student{" + "name=‘" + name + \‘ + ", address=" + address.toString() + ", book=" + Arrays.toString(book) + ", hobbies=" + hobbies + ", card=" + card + ", games=" + games + ", wife=‘" + wife + \‘ + ", iinfo=" + iinfo + }; } }

 

下面是配置文件:这里需要注意的是要区分将map和peoperties对比了解。

map中的key和value是通过<entry key="身份证" value="123456789"/>

而peoperties是<prop key="学号">20183763</prop>,value的值是写在中间的。

下面的代码中我将其两个写在了一块,便于对比。

 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
  <!--  <bean id="user" class="com.ly.pojo.User">
       <constructor-arg name="name" value="凌云"></constructor-arg>
    </bean>-->
    <bean id="address" class="com.ly.pojo.Address">
        <property name="address" value="甘肃省庆阳市南大街"/>
    </bean>
    <bean id="student" class="com.ly.pojo.Student">
        <!--普通注入-->
        <property name="name" value="凌云"/>
        <!--Bean注入-->
        <property name="address" ref="address"/>
        <!--数组注入-->
        <property name="book">
            <array>
                <value>红楼梦</value>
                <value>西游记</value>
                <value>水浒传</value>
                <value>三国演义</value>
            </array>
        </property>
        <property name="hobbies" >
            <list>
                <value>听歌曲</value>
                <value>敲代码</value>
                <value>看电影</value>
            </list>
        </property>
         <property name="card">
             <map>
                 <entry key="身份证" value="123456789"/>
                 <entry key="银行卡" value="5555555555"/>
             </map>
         </property>
        <property name="iinfo">
            <props>
                <prop key="学号">20183763</prop>
                <prop key="性别"></prop>
                <prop key="姓名">凌云</prop>
            </props>
        </property>
        <property name="games">
            <set>
                <value>LOL</value>
                <value>COC</value>
                <value>BOB</value>
            </set>
        </property>
        <property name="wife" >
            <null/>
        </property>


     </bean>


</beans>

 

Spring各种类型变量set依赖注入的方法

原文:https://www.cnblogs.com/moxihuishou/p/15116473.html

(0)
(0)
   
举报
评论 一句话评论(0
关于我们 - 联系我们 - 留言反馈 - 联系我们:wmxa8@hotmail.com
© 2014 bubuko.com 版权所有
打开技术之扣,分享程序人生!