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Spring4-自动装配Beans-通过注解@Autowired在构造方法上
1.创建Maven项目,项目名称springdemo19,如图所示
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
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
6.实体Bean ForumPost的内容如下
package com.mycompany.shequ.bean; import org.springframework.beans.factory.annotation.Autowired; public class ForumPost { private int pid; private String name; private Forum forum; public ForumPost() { super(); } @Autowired 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; } public void setForum(Forum forum) { this.forum = 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
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"> <bean id="forumpost" class="com.mycompany.shequ.bean.ForumPost"> </bean> <bean id="forum" class="com.mycompany.shequ.bean.Forum"> <property name="fid" value="http://www.mamicode.com/3"></property> <property name="name" value="http://www.mamicode.com/@Autowired 在构造方法上"></property> </bean> </beans>
9.在src/main/resources下创建spring的核心配置文件applicationContext.xml,如图所示
10.spring的核心配置文件applicationContext.xml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" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <context:annotation-config /> <import resource="bean/spring-bean.xml"/> </beans>
11.在src/test/java下创建测试类ForumPostTest,包名(com.mycompany.shequ.bean),如图所示
12.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,通过注解@Autowired在构造方法上 */ @Test public void autowiredTest(){ ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); ForumPost forumPost = (ForumPost) context.getBean("forumpost"); System.out.println(forumPost.getForum().getName()); } }
13.在测试类ForumPostTest的byTypeTest方法上右键运行,输出结果如图所示
本文出自 “素颜” 博客,请务必保留此出处http://suyanzhu.blog.51cto.com/8050189/1909539
Spring4-自动装配Beans-通过注解@Autowired在构造方法上
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