文章目录
一、搭建环境
打开IDEA创建不使用骨架的Maven工程，然后打开pim.xml，导入SpringFreamwork与Junit：
<dependencies>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.12.RELEASE</version>
</dependency>
</dependencies>
创建一个包含所有类型的实体类：
创建Address实体类，作为另一个实体类的属性用：
package com.wzq.pojo;
public class Address {
private String address;
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "Address{" +
"address='" + address + '\'' +
'}';
}
}
创建Student类：
package com.wzq.pojo;
import java.util.*;
public class Student {
//属性：
private String name;
private Address address;
private String[] books;
private List<String> hobbys;
private Map<String,String> card;
private Set<String> games;
private String wife; //这个用来注入空，毕竟没有媳妇儿
private Properties info;
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[] getBooks() {
return books;
}
public void setBooks(String[] books) {
this.books = books;
}
public List<String> getHobbys() {
return hobbys;
}
public void setHobbys(List<String> hobbys) {
this.hobbys = hobbys;
}
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 getInfo() {
return info;
}
public void setInfo(Properties info) {
this.info = info;
}
@Override
public String toString() {
return "Student{" +
"name='" + name + '\'' +
", address=" + address +
", books=" + Arrays.toString(books) +
", hobbys=" + hobbys +
", card=" + card +
", games=" + games +
", wife='" + wife + '\'' +
", info=" + info +
'}';
}
}
创建beans.xml：
<?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.wzq.pojo.Address">
<property name="address" value="洛阳"/>
</bean>
</beans>
二、使用Set方式注入
1、实现依赖注入
打开beans.xml（说明都在注释里）：
<?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.wzq.pojo.Address">
<property name="address" value="洛阳"/>
</bean>
<bean id="student" class="com.wzq.pojo.Student">
<!-- 默认方式 -->
<property name="name" value="wzq"/>
<!-- 对象 -->
<property name="address" ref="address"/>
<!-- 数组 -->
<property name="books">
<array>
<value>红楼梦</value>
<value>西游记</value>
<value>水浒传</value>
<value>三国演义</value>
</array>
</property>
<!-- list -->
<property name="hobbys">
<list>
<value>听歌</value>
<value>敲代码</value>
<value>看电影</value>
</list>
</property>
<!-- Map -->
<property name="card">
<map>
<entry key="身份证" value="41032xxxxxxxxxxxxx"/>
<entry key="银行卡" value="41032xxxxxxxxxxxxx"/>
</map>
</property>
<!-- Set -->
<property name="games">
<set>
<value>英雄联盟</value>
<value>王者荣耀</value>
<value>吃鸡</value>
</set>
</property>
<!-- null -->
<property name="wife">
<null/>
</property>
<!-- properties -->
<property name="info">
<props>
<prop key="driver">driver</prop>
<prop key="url">url</prop>
<prop key="username">username</prop>
<prop key="password">password</prop>
</props>
</property>
</bean>
</beans>
2、测试
使用Junti测试：
import com.wzq.pojo.Student;
import com.wzq.pojo.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MyTest {
@Test
public void Test(){
ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
Student student = context.getBean("student", Student.class);
System.out.println(student.toString());
}
}
输出结果：
Student{
name='wzq',
address=Address{
address='洛阳'},
books=[红楼梦, 西游记, 水浒传, 三国演义],
hobbys=[听歌, 敲代码, 看电影],
card={
身份证=41032xxxxxxxxxxxxx, 银行卡=41032xxxxxxxxxxxxx},
games=[英雄联盟, 王者荣耀, 吃鸡],
wife='null',
info={
password=password, url=url, driver=driver, username=username}
}