Spring4-PropertyPlaceholderConfigurer类的使用,并引用properties

标签：spring4-propertyplaceholderconfigurer类的使用   并引用properties   

1.创建Maven项目,项目名称springdemo34,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/java下创建接口Bean IForumDao,包名(com.mycompany.shequ.dao)如图所示

6.接口Bean IForumDao的内容如下

package com.mycompany.shequ.dao;

import java.util.List;

import com.mycompany.shequ.bean.Forum;

public interface IForumDao {
	public List<Forum> findAll();
}

7.在src/main/java下创建接口Bean IForumDao的实现类ForumDaoImpl,包名(com.mycompany.shequ.dao.impl)如图所示

8.接口Bean IForumDao的实现类ForumDaoImpl的内容如下

package com.mycompany.shequ.dao.impl;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.springframework.jdbc.core.support.JdbcDaoSupport;

import com.mycompany.shequ.bean.Forum;
import com.mycompany.shequ.dao.IForumDao;

public class ForumDaoImpl extends JdbcDaoSupport implements IForumDao {

	public List<Forum> findAll() {
		String sql = "select * from hnsq_forum";
		List<Forum> forumList = new ArrayList<Forum>();
		List<Map<String, Object>> rows = getJdbcTemplate().queryForList(sql);
		for(Map row : rows){
			Forum forum = new Forum();
			forum.setFid((Integer)(row.get("fid")));
			forum.setName((String)(row.get("name")));
			forumList.add(forum);
		}
		
		return forumList;
	}

}

9.在src/main/resource下创建bean的配置文件spring-dao.xml,如图所示

10.配置文件spring-dao.xml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"
	xmlns:util="http://www.springframework.org/schema/util"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
	http://www.springframework.org/schema/util
	http://www.springframework.org/schema/util/spring-util-4.0.xsd">
	
	<bean id="forumdao" class="com.mycompany.shequ.dao.impl.ForumDaoImpl">
		<property name="dataSource" ref="dataSource"></property>
	</bean>

</beans>

11.在src/main/resource下创建属性文件database.properties,如图所示

12.属性文件database.properties的内容如下

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/b_demo_two
jdbc.username=root
jdbc.password=

13.在src/main/resource下创建数据源配置文件spring-datasource.xml,如图所示

14.数据源配置文件spring-datasource.xml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"
	xmlns:util="http://www.springframework.org/schema/util"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
	http://www.springframework.org/schema/util
	http://www.springframework.org/schema/util/spring-util-4.0.xsd">
	
	<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="location">
			<value>properties/database.properties</value>
		</property>
	</bean>
	
	<!-- 数据源Bean -->
	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName" value="${jdbc.driverClassName}"></property>
		<property name="url" value="${jdbc.url}"></property>
		<property name="username" value="${jdbc.username}"></property>
		<property name="password" value="${jdbc.password}"></property>
	</bean>

</beans>

15.在src/main/resource下创建核心配置文件applicationContext.xml,如图所示

16.核心配置文件applicationContext.xml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="datasource/spring-datasource.xml"/>

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

</beans>

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

18.测试文件AppTest的内容如下

package com.mycompany.shequ.test;

import java.util.List;

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

import com.mycompany.shequ.bean.Forum;
import com.mycompany.shequ.dao.IForumDao;

public class AppTest {
	
	@Test
	public void beanTest(){
	    ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
	    IForumDao forumDao = (IForumDao) context.getBean("forumdao");
		
	    List<Forum> forumList = forumDao.findAll();
	    for(Forum forum : forumList){
	    	System.out.println(forum.getFid() + "_____" + forum.getName());
	    }
	}
}

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

本文出自 “素颜” 博客，谢绝转载！

Spring4-PropertyPlaceholderConfigurer类的使用,并引用properties

标签：spring4-propertyplaceholderconfigurer类的使用   并引用properties   

原文地址：http://suyanzhu.blog.51cto.com/8050189/1910032