Properties 类表示了一个持久的属性集。Properties 可保存在流中或从流中加载。属性列表中每个键及其对应值都是一个字符串。在spring中可以用其存储连接数据库的相关信息。
DataSource.java
package com.gong.spring.beans; import java.util.Properties; public class DataSource { private Properties properties; public Properties getProperties() { return properties; } void setProperties(Properties properties) { this.properties = properties; } @Override String toString() { return "DataSource [properties=" + properties + "]"; } }
applicationContext.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="dataSource" class="com.gong.spring.beans.DataSource"> <property name="properties"> <props> <prop key="user">root</prop> <prop key="password">123456</prop> <prop key="jdbcUrl">jdbc:MysqL:///test</prop> <prop key="driverClass">com.MysqL.jdbc.Driver</prop> </props> </property> </bean> </beans>
Main.java
org.springframework.context.ApplicationContext; org.springframework.context.support.ClassPathXmlApplicationContext; Main { static main(String[] args) { 1.创建spring的IOC容器对象 ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); 2.从容器中获取Bean实例 DataSource dataSource = (DataSource) ctx.getBean("dataSource"); System.out.println(dataSource.toString()); } }
输出：
