Spring 在配置中使用*.properties

http://www.blogjava.net/wmcoo/articles/333345.html

<?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"
    xmlns:util="http://www.springframework.org/schema/util"
    xsi:schemaLocation="http://www.springframework.org/schema/beans   
            http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
            http://www.springframework.org/schema/context  
            http://www.springframework.org/schema/context/spring-context-3.0.xsd
            http://www.springframework.org/schema/util 
            http://www.springframework.org/schema/util/spring-util-3.0.xsd">
    <context:annotation-config/>
    <!-- picks up and registers AppConfig as a bean definition -->
    <context:component-scan base-package="com.web.spring.other" />
    
    <bean class="com.web.spring.other.AppConfig"/>
	访法一
    <context:property-placeholder location="classpath:jdbc.properties" />
</beans>

package com.web.spring.other;

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;

@Configuration
public class AppConfig {
    private @Value("${jdbc.driverClassName}") String driverClassName;
    @Bean(initMethod = "init")
    public JDBCBean jdbc(){
        JDBCBean jdbc=new JDBCBean();
        jdbc.setDriverClassName(driverClassName);
        return jdbc;
    }

}

在applaction.xml也可以直接使用:

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName" value="${driverClassName}"/>
		<property name="url" value="${url}" />
		<property name="username" value="${username}"/>
		<property name="password" value="${password}"/>
	</bean>

jdbc.driverClassName=org.hsqldb.jdbcDriver



另一种方法:spring 3中新增的@value注解
http://jackyrong.iteye.com/blog/1330946

在spring 3.0中，可以通过使用@value，对一些如xxx.properties文件
中的文件，进行键值对的注入，例子如下：

1 首先在applicationContext.xml中加入：
   <beans xmlns:util="http://www.springframework.org/schema/util" 
    xsi:schemaLocation="http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd"> 
</beans> 
 
   的命名空间，然后

2
<util:properties id="settings" location="WEB-INF/classes/META-INF/spring/test.properties" /> 

3 创建test.properties
   abc=123

4
import org.springframework.beans.factory.annotation.Value;  
import org.springframework.stereotype.Controller;  
import org.springframework.web.bind.annotation.RequestMapping;  
 
@RequestMapping("/admin/images")  
@Controller  
public class ImageAdminController {  
 
    private String imageDir;  
           @Value("#{settings['test.abc']}")  
    public void setImageDir(String val) {  
        this.imageDir = val;  
    }  
 

} 
这样就将test.abc的值注入了imageDir中了