ImportResource用于加载资源文件，用于将变量注解。
拥有变量的类
package com.imooc.beanannotation.javabased;
public class MyDriverManager {
public MyDriverManager(String url, String userName, String password) {
System.out.println("url : " + url);
System.out.println("userName: " + userName);
System.out.println("password: " + password);
}
}
注解类，将资源文件中的变量注入类成员
添加注解的类
package com.imooc.beanannotation.javabased;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;
import org.springframework.context.annotation.Scope;
import org.springframework.context.annotation.ScopedProxyMode;
@Configuration
@ImportResource("classpath:config.xml")
public class StoreConfig {
@Value("${url}")
private String url;
@Value("${jdbc.username}")
private String username;
@Value("${password}")
private String password;
@Bean
public MyDriverManager myDriverManager() {
return new MyDriverManager(url, username, password);
}
}
加载classpath下的config.xml文件，将url,username,password等变量注入成员变量
config.xml
<?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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd" >
<context:property-placeholder location="classpath:/config.properties"/>
</beans>
config.properties
#Created by JInto - www.guh-software.de #Sun Aug 10 16:25:57 CST 2014 jdbc.username=root password=root url=127.0.0.1
测试方法
@Test
public void testMyDriverManager() {
MyDriverManager manager = super.getBean("myDriverManager");
System.out.println(manager.getClass().getName());
}
使用注解和使用XML配置文件对比
