Spring4-三种方式注入值到 bean 属性

1.创建Maven项目,项目名称springdemo24,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;
}
@Override
public String toString() {
return "{fid=>"+this.fid+",name=>"+this.name+"}";
}
}

5.在src/main/resources下创建spring-bean.xml配置文件,如图所示

6.spring-bean.xml配置文件的内容如下

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd"> 
<!-- 1.正常方式 -->
<bean id="forum1" class="com.mycompany.shequ.bean.Forum">
<property name="fid" >
<value>1</value>
</property>

<property name="name">
<value>正常方式</value>
</property>
</bean>

<!-- 2.快捷方式 -->
<bean id="forum2" class="com.mycompany.shequ.bean.Forum">
<property name="fid" value="2"></property>
<property name="name" value="快捷方式"></property>
</bean>

<!-- 3.p方式 -->
<bean id="forum3" class="com.mycompany.shequ.bean.Forum" p:fid="3" p:name="p方式"></bean>

</beans>

7.在src/main/resources下创建applicationContext.xml配置文件,如图所示

8.applicationContext.xml配置文件的内容如下

<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-4.0.xsd"> 
<import resource="bean/spring-bean.xml"/>

</beans>

9.在src/test/java下创建测试文件AppTest,包名(com.mycompany.shequ.test)如图所示

10.测试文件AppTest的内容如下

package com.mycompany.shequ.test;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.mycompany.shequ.bean.Forum;

public class AppTest {

@Test
public void beanTest(){
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
Forum forum1 = (Forum) context.getBean("forum1");
System.out.println(forum1);

Forum forum2 = (Forum) context.getBean("forum2");
System.out.println(forum2);

Forum forum3 = (Forum) context.getBean("forum3");
System.out.println(forum3);
}
}

11.在测试类AppTest的beanTest方法上右键运行,输出结果如图所示