目的:去了解xml配置bean依赖注入和配置的一些细节(bean、数组、list、map、set、properties)
注意:这里用到的应该是spring-context,但是spring-webmvc由于继承的关系会有一张依赖网:
算是省心省力吧。
<!--Spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--JUnit-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
这次使用基于setter的依赖注入,不显式创建构造函数:
路径
代码
Address.java
package com.duzhuan.pojo;
/**
* @Autord: HuangDekai
* @Date: 2020/9/23 14:34
* @Version: 1.0
* @since: jdk11
*/
public class Address {
private int id;
private String address;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "Address{" +
"id=" + id +
", address=‘" + address + ‘\‘‘ +
‘}‘;
}
}
Student.java
package com.duzhuan.pojo;
import java.util.*;
/**
* @Autord: HuangDekai
* @Date: 2020/9/23 14:33
* @Version: 1.0
* @since: jdk11
*/
public class Student {
private String name;
private Address address;
private String[] books;
private List<String> hobbies;
private Map<String,String> card;
private Set<String> games;
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> 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 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) +
", hobbies=" + hobbies +
", card=" + card +
", games=" + games +
", info=" + info +
‘}‘;
}
}
路径
代码
<?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 name="address,a1" class="com.duzhuan.pojo.Address">
<property name="id" value="1"/>
<property name="address" value="上海市翻斗大街翻斗花园二号楼1001室"/>
</bean>
<!--注册一个Bean,可以看到,这样的命名方式可以对一个bean命名多个name-->
<bean name="student,s1" class="com.duzhuan.pojo.Student">
<property name="name">
<null/>
</property>
<!--注入一个对象-->
<property name="address" ref="a1"/>
<!--注入一个数组-->
<property name="books">
<array>
<value>Spring实战(第四版)</value>
<value>算法导论</value>
</array>
</property>
<!--注入一个List-->
<property name="hobbies">
<list>
<value>写代码</value>
<value>看番</value>
</list>
</property>
<!--注入一个Map-->
<property name="card">
<map>
<entry key="校园卡" value="20201111003"/>
<entry key="门禁卡" value="20191111001"/>
</map>
</property>
<!--注入一个set-->
<property name="games">
<set>
<value>LOL</value>
<value>WOW</value>
</set>
</property>
<!--注入一个Properties-->
<property name="info">
<props>
<prop key="学号">17123456</prop>
</props>
</property>
</bean>
</beans>
import com.duzhuan.pojo.Student;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
* @Autord: HuangDekai
* @Date: 2020/9/23 20:41
* @Version: 1.0
* @since: jdk11
*/
public class StudentTest {
@Test
public void studentTest(){
ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
Student s1 = (Student) context.getBean("s1");
System.out.println(s1);
}
}
Spring5入门-03-依赖注入和配置的一些细节(bean、数组、list、map、set、properties)
原文:https://www.cnblogs.com/duzhuan/p/13721353.html