spring提供了多种方式来注入properties文件，本文做一个简单的总结。
在Spring配置文件中引入
方式一
通过<context:property-placeholder />标签
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<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx.xsd"> <context:property-placeholder location="classpath:mysql.properties" ignore-unresolvable="true"/> <!-- 配置数据源 --> <bean abstract="true" name="parentDatasource" class="com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="${ds1.jdbc.driverClassName}" /> <!-- 初始化连接大小 --> <property name="initialSize" value="1" /> <!-- 连接池最大使用连接数量 --> <property name="maxActive" value="100" /> <!-- 连接池最小空闲 --> <property name="minIdle" value="20" /> <!-- 获取连接最大等待时间 --> <property name="maxWait" value="30000" /> <!-- <property name="poolPreparedStatements" value="true" /> --> <!-- <property name="maxPoolPreparedStatementPerConnectionSize" value="33" /> --> <property name="validationQuery" value="SELECT 1" /> <property name="testOnBorrow" value="true" /> <property name="testOnReturn" value="true" /> <property name="testWhileIdle" value="true" /> <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="25200000" /> <!-- 打开removeAbandoned功能 --> <property name="removeAbandoned" value="true" /> <!-- 1800秒，也就是30分钟 --> <property name="removeAbandonedTimeout" value="1800" /> <!-- 关闭abanded连接时输出错误日志 --> <property name="logAbandoned" value="true" /> <!-- 监控数据库 --> <!-- <property name="filters" value="stat" /> --> <property name="filters" value="mergeStat" /> </bean> <!-- 配置数据源 --> <bean name="dataSource1" init-method="init" destroy-method="close" parent="parentDatasource"> <property name="url" value="${ds1.jdbc.url}" /> <property name="username" value="${ds1.jdbc.username}" /> <property name="password" value="${ds1.jdbc.password}" /> </bean> <!-- 配置数据源 --> <bean name="dataSource2" init-method="init" destroy-method="close" parent="parentDatasource"> <property name="url" value="${ds2.jdbc.url}" /> <property name="username" value="${ds2.jdbc.username}" /> <property name="password" value="${ds2.jdbc.password}" /> </bean> <!-- 配置事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource1" /> </bean> <!-- 注解方式配置事物 --> <tx:annotation-driven transaction-manager="transactionManager" /></beans> |
方式二
通过<util:properties />
1、MySQL.properties
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#ds1.jdbc.driverClassName=com.mysql.jdbc.Driverds1.jdbc.url=jdbc:mysql://localhost:3306/process?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNullds1.jdbc.username=rootds1.jdbc.password=rootds2.jdbc.driverClassName=com.mysql.jdbc.Driverds2.jdbc.url=jdbc:mysql://localhost:3306/process?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNullds2.jdbc.username=rootds2.jdbc.password=root |
2、applicationContext.xml
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<?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:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:task="http://www.springframework.org/schema/task" xmlns:util="http://www.springframework.org/schema/util" xmlns:jaxws="http://cxf.apache.org/jaxws" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd" default-lazy-init="false"> <util:properties id="db" location="classpath:mysql.properties"/><!-- 配置数据源 --> <bean name="dataSource1" init-method="init" destroy-method="close" parent="parentDatasource"> <property name="url" value="#{db['ds1.jdbc.url']}" /> <property name="username" value="#{db['ds1.jdbc.username']}" /> <property name="password" value="#{db['ds1.jdbc.password']}" /> </bean></beans> |
在代码中注入
方式一
1、config.properties
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name=rickyage=27password=root |
2、applicationContext.xml
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<!-- 使用注解注入properties中的值 --> <bean id="config" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="locations"> <list> <value>classpath:config.properties</value> </list> </property> <!-- 设置编码格式 --> <property name="fileEncoding" value="UTF-8"></property> </bean> |
3、使用@Value注解
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package com.ricky.codelab.springmvc.domain;import org.springframework.beans.factory.annotation.Value;import org.springframework.stereotype.Component;/** * ${DESCRIPTION} * * @author Ricky Fung * @create 2016-08-08 15:49 */@Component("userService")public class UserServiceImpl implements IUserService { private final Logger logger = LoggerFactory.getLogger(getClass()); @Value("#{config[name]}") private String name; @Value("#{config[age]}") private Integer age; @Value("#{config[password]}") private String password; @Override public void login(String username){ System.out.println("name:"+name+",age="+age+",password="+password); }} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://blog.csdn.net/top_code/article/details/52170200
