1.创建Maven项目,项目名称springdemo17,如图所示
![QQ截图20170323104810.png Spring4-自动装配Beans-通过构造函数参数的数据类型按属性自动装配Bean_Beans](https://s2.51cto.com/wyfs02/M01/8F/15/wKiom1jTN5mwr-2zAAAVZbvPl7I842.png?x-oss-process=image/resize,m_fixed,w_1184)
2.配置Maven,修改项目中的pom.xml文件,修改内容如下
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>1.0.0</modelVersion>
<groupId>shequ</groupId>
<artifactId>springdemo13</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<java.version>1.7</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
</properties>
<repositories>
<repository>
<id>codelds</id>
<url>https://code.lds.org/nexus/content/groups/main-repo</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.1.4.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.34</version>
</dependency>
</dependencies>
<build/>
</project>
3.在src/main/java下创建实体Bean Forum,包名(com.mycompany.shequ.bean)如图所示
![QQ截图20170323104907.png Spring4-自动装配Beans-通过构造函数参数的数据类型按属性自动装配Bean_自动装配_02](https://s2.51cto.com/wyfs02/M02/8F/15/wKiom1jTN9LDE70GAABOPiQgl6w454.png?x-oss-process=image/resize,m_fixed,w_1184)
4.实体Bean Forum的内容如下
package com.mycompany.shequ.bean;
public class Forum {
private int fid;
private String name;
public int getFid() {
return fid;
}
public void setFid(int fid) {
this.fid = fid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
5.在src/main/java下创建实体Bean ForumPost,包名(com.mycompany.shequ.bean)如图所示
![QQ截图20170323105053.png Spring4-自动装配Beans-通过构造函数参数的数据类型按属性自动装配Bean_Spring4_03](https://s2.51cto.com/wyfs02/M00/8F/13/wKioL1jTOD_gmLVrAABNLQL8DJI524.png?x-oss-process=image/resize,m_fixed,w_1184)
6.实体Bean ForumPost的内容如下
package com.mycompany.shequ.bean;
public class ForumPost {
private int pid;
private String name;
private Forum forum;
public ForumPost() {
super();
}
public ForumPost(Forum forum) {
super();
this.forum = forum;
}
public int getPid() {
return pid;
}
public void setPid(int pid) {
this.pid = pid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Forum getForum() {
return forum;
}
}
7.在src/main/resources下创建Bean配置文件,配置文件名称spring-bean.xml,如图所示
![QQ截图20170323105209.png Spring4-自动装配Beans-通过构造函数参数的数据类型按属性自动装配Bean_Spring4_04](https://s2.51cto.com/wyfs02/M02/8F/13/wKioL1jTOIeSfItcAABHSEt93oo905.png?x-oss-process=image/resize,m_fixed,w_1184)
8.spring-bean.xml文件的内容如下
<?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">
<!-- 通过构造函数参数的数据类型按属性自动装配Bean -->
<bean id="forumpost"
class="com.mycompany.shequ.bean.ForumPost" autowire="constructor">
</bean>
<bean id="forum" class="com.mycompany.shequ.bean.Forum">
<property name="fid" value="3"></property>
<property name="name" value="大客户"></property>
</bean>
</beans>
9.在src/test/java下创建测试类ForumPostTest,包名(com.mycompany.shequ.bean),如图所示
![QQ截图20170323105353.png Spring4-自动装配Beans-通过构造函数参数的数据类型按属性自动装配Bean_自动装配_05](https://s2.51cto.com/wyfs02/M02/8F/15/wKiom1jTOPCAzwjyAABKA6Y1lGE580.png?x-oss-process=image/resize,m_fixed,w_1184)
10.测试类ForumPostTest的内容如下
package com.mycompany.shequ.bean;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class ForumPostTest {
/**
* spring 的自动装配Beans,通过构造函数参数的数据类型按属性自动装配Bean
*/
@Test
public void constructorTest(){
ApplicationContext context = new ClassPathXmlApplicationContext("/bean/spring-bean.xml");
ForumPost forumPost = (ForumPost) context.getBean("forumpost");
System.out.println(forumPost.getForum().getName());
}
}
11.在测试类ForumPostTest的byTypeTest方法上右键运行,输出结果如图所示
![QQ截图20170323105504.png Spring4-自动装配Beans-通过构造函数参数的数据类型按属性自动装配Bean_自动装配_06](https://s2.51cto.com/wyfs02/M02/8F/13/wKioL1jTOTex1P4eAAEAfHkkKUU149.png?x-oss-process=image/resize,m_fixed,w_1184)
![QQ截图20170324102905.png Spring4-自动装配Beans-通过构造函数参数的数据类型按属性自动装配Bean_Beans_07](https://s2.51cto.com/wyfs02/M01/8F/20/wKioL1jUhxiTf1tQAABwCKMO5XE316.png?x-oss-process=image/resize,m_fixed,w_1184)