我們?cè)陂_(kāi)發(fā)的時(shí)候，經(jīng)常會(huì)需要多種環(huán)境，比如開(kāi)發(fā)環(huán)境，測(cè)試環(huán)境，生產(chǎn)環(huán)境的數(shù)據(jù)庫(kù)地址是不一樣的。sPRing mvc環(huán)境下如何配置呢？

            在web.xml里面有個(gè)屬性，可以配置。

            比如我們配置測(cè)試環(huán)境。

	<context-param>  	    <param-name>spring.profiles.active</param-name>  	    <param-value>test</param-value>  	</context-param>               在spring xml配置文件這么配置
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"	xmlns:jee="http://www.springframework.org/schema/jee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"	xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:tx="http://www.springframework.org/schema/tx"	xsi:schemaLocation="http://www.springframework.org/schema/beans 						http://www.springframework.org/schema/beans/spring-beans-3.1.xsd						http://www.springframework.org/schema/data/jpa						http://www.springframework.org/schema/data/jpa/spring-jpa-1.1.xsd						http://www.springframework.org/schema/tx      					http://www.springframework.org/schema/tx/spring-tx-3.1.xsd      					http://www.springframework.org/schema/jee      					http://www.springframework.org/schema/jee/spring-jee-3.1.xsd">	<bean id="propertyConfigurer"		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">		<property name="location" value="classpath:database.properties" />	</bean>	       <beans profile="prod">		<jee:jndi-lookup id="dataSource" jndi-name="${jpreTest.datasource}"			resource-ref="true" />		<jee:jndi-lookup id="dataSource2" jndi-name="${jpreTest.datasource2}"			resource-ref="true" />	</beans>	<beans profile="test">	    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">			<property name="driverClass" value="${jpreTest.connection.driver_class}" />			<property name="jdbcUrl" value="${jpreTest.connection.url}" />			<property name="user" value="${jpreTest.connection.username}" />			<property name="passWord" value="${jpreTest.connection.password}" />			<!-- 初始線(xiàn)程數(shù) -->            <property name="initialPoolSize" value="5" />            <!-- 最小線(xiàn)程數(shù) -->            <property name="minPoolSize" value="${jpreTest.minPoolSize}" />            <!-- 最大線(xiàn)程數(shù) -->            <property name="maxPoolSize" value="${jpreTest.maxPoolSize}" />            <!-- 空閑時(shí)間，單位秒 -->            <property name="maxIdleTime" value="1200" />            <!-- 獲取連接失敗后該數(shù)據(jù)源將申明已斷開(kāi)并永久關(guān)閉 -->            <property name="breakAfterAcquireFailure" value="true" />            <!--每60秒檢查所有連接池中的空閑連接。Default: 0 -->              <property name="idleConnectionTestPeriod" value="60"/>              <!--如果設(shè)為true那么在取得連接的同時(shí)將校驗(yàn)連接的有效性。Default: false -->              <property name="testConnectionOnCheckin" value="true" />            <!-- 鏈接池耗盡時(shí)一次獲取的連接數(shù) -->            <property name="acquireIncrement" value="5" />		</bean>	    <bean id="dataSource2" class="com.mchange.v2.c3p0.ComboPooledDataSource">			<property name="driverClass" value="${jpreTest.connection.driver_class}" />			<property name="jdbcUrl" value="${jpreTest.connection.url2}" />			<property name="user" value="${jpreTest.connection.username2}" />			<property name="password" value="${jpreTest.connection.password2}" />			<!-- 初始線(xiàn)程數(shù) -->            <property name="initialPoolSize" value="5" />            <!-- 最小線(xiàn)程數(shù) -->            <property name="minPoolSize" value="${jpreTest.minPoolSize}" />            <!-- 最大線(xiàn)程數(shù) -->            <property name="maxPoolSize" value="${jpreTest.maxPoolSize}" />            <!-- 空閑時(shí)間，單位秒 -->            <property name="maxIdleTime" value="1200" />            <!-- 獲取連接失敗后該數(shù)據(jù)源將申明已斷開(kāi)并永久關(guān)閉 -->            <property name="breakAfterAcquireFailure" value="true" />            <!--每60秒檢查所有連接池中的空閑連接。Default: 0 -->              <property name="idleConnectionTestPeriod" value="60"/>              <!--如果設(shè)為true那么在取得連接的同時(shí)將校驗(yàn)連接的有效性。Default: false -->              <property name="testConnectionOnCheckin" value="true" />            <!-- 鏈接池耗盡時(shí)一次獲取的連接數(shù) -->            <property name="acquireIncrement" value="5" />		</bean>	</beans></beans>