1，构造器注入：
个人理解是使用构造方法来创建对象的方法称为构造器注入
constructor-arg（有参）和property（无参）
2，set注入（重点）：
- 依赖注入：set注入
- 依赖：bean对象的创建依赖于容器
- 注入：bean对象中的所有属性，由容器来注入
package com.spring.people; import java.util.*; public class Student { private String name; private Adress adress;//这是一个自定义的类 private String[] books; private List<String> hobby; private Map<String,String> card; private Set<String> game; private Properties info; private String wife; public Student() { } public String getName() { return name; } public void setName(String name) { this.name = name; } public Adress getAdress() { return adress; } public void setAdress(Adress adress) { this.adress = adress; } public String[] getBooks() { return books; } public void setBooks(String[] books) { this.books = books; } public List<String> getHobby() { return hobby; } public void setHobby(List<String> hobby) { this.hobby = hobby; } public Map<String, String> getCard() { return card; } public void setCard(Map<String, String> card) { this.card = card; } public Set<String> getGame() { return game; } public void setGame(Set<String> game) { this.game = game; } public Properties getInfo() { return info; } public void setInfo(Properties info) { this.info = info; } public String getWife() { return wife; } public void setWife(String wife) { this.wife = wife; } @Override public String toString() { return "Student{" + "name='" + name + '\'' + ", adress=" + adress + ", books=" + Arrays.toString(books) + ", hobby=" + hobby + ", card=" + card + ", game=" + game + ", info=" + info + ", wife='" + wife + '\'' + '}'; } }
<?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 https://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="address" class="com.spring.people.Adress"> <property name="address" value="杜王町"/> </bean> <bean id="student" class="com.spring.people.Student"> <!--普通注入--> <property name="name" value="zhangsan"></property> <!--bean注入--> <property name="adress" ref="address"/> <!--数组注入--> <property name="books" > <array> <value>红楼梦</value> <value>西游记</value> <value>三国演义</value> <value>水浒传</value> </array> </property> <!--list注入--> <property name="hobby"> <list> <value>java</value> <value>c</value> <value>python</value> </list> </property> <!--map注入--> <property name="card"> <map> <entry key="a" value="a1"/> <entry key="b" value="b1"/> <entry key="c" value="c1"/> </map> </property> <!--Set注入--> <property name="game"> <set> <value>lol</value> <value>ow</value> </set> </property> <!--null--> <property name="wife"> <null></null> </property> <!--properties--> <property name="info"> <props> <prop key="学号">2010</prop> <prop key="性别">男</prop> </props> </property> </bean> </beans>
