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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="http://www.mamicode.com/${jdbc.driverClassName}"></property>
<property name="url" value="http://www.mamicode.com/${jdbc.url}"></property>
<property name="username" value="http://www.mamicode.com/${jdbc.username}"></property>
<property name="password" value="http://www.mamicode.com/${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
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