谈谈Spring 注入properties文件总结
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
<?xmlversion="1.0"encoding="UTF-8"?>
<beansxmlns="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/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
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:property-placeholderlocation="classpath:mysql.properties"ignore-unresolvable="true"/>
<!--配置数据源-->
<beanabstract="true"name="parentDatasource"class="com.alibaba.druid.pool.DruidDataSource">
<propertyname="driverClassName"value="${ds1.jdbc.driverClassName}"/>
<!--初始化连接大小-->
<propertyname="initialSize"value="1"/>
<!--连接池最大使用连接数量-->
<propertyname="maxActive"value="100"/>
<!--连接池最小空闲-->
<propertyname="minIdle"value="20"/>
<!--获取连接最大等待时间-->
<propertyname="maxWait"value="30000"/>
<!--<propertyname="poolPreparedStatements"value="true"/>-->
<!--<propertyname="maxPoolPreparedStatementPerConnectionSize"value="33"/>-->
<propertyname="validationQuery"value="SELECT1"/>
<propertyname="testOnBorrow"value="true"/>
<propertyname="testOnReturn"value="true"/>
<propertyname="testWhileIdle"value="true"/>
<!--配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒-->
<propertyname="timeBetweenEvictionRunsMillis"value="60000"/>
<!--配置一个连接在池中最小生存的时间，单位是毫秒-->
<propertyname="minEvictableIdleTimeMillis"value="25200000"/>
<!--打开removeAbandoned功能-->
<propertyname="removeAbandoned"value="true"/>
<!--1800秒，也就是30分钟-->
<propertyname="removeAbandonedTimeout"value="1800"/>
<!--关闭abanded连接时输出错误日志-->
<propertyname="logAbandoned"value="true"/>
<!--监控数据库-->
<!--<propertyname="filters"value="stat"/>-->
<propertyname="filters"value="mergeStat"/>
</bean>
<!--配置数据源-->
<beanname="dataSource1"init-method="init"destroy-method="close"parent="parentDatasource">
<propertyname="url"value="${ds1.jdbc.url}"/>
<propertyname="username"value="${ds1.jdbc.username}"/>
<propertyname="password"value="${ds1.jdbc.password}"/>
</bean>
<!--配置数据源-->
<beanname="dataSource2"init-method="init"destroy-method="close"parent="parentDatasource">
<propertyname="url"value="${ds2.jdbc.url}"/>
<propertyname="username"value="${ds2.jdbc.username}"/>
<propertyname="password"value="${ds2.jdbc.password}"/>
</bean>
<!--配置事务管理器-->
<beanid="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<propertyname="dataSource"ref="dataSource1"/>
</bean>
<!--注解方式配置事物-->
<tx:annotation-driventransaction-manager="transactionManager"/>
</beans>
方式二
通过<util:properties/>
1、MySQL.properties
# ds1.jdbc.driverClassName=com.mysql.jdbc.Driver ds1.jdbc.url=jdbc:mysql://localhost:3306/process?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull ds1.jdbc.username=root ds1.jdbc.password=root ds2.jdbc.driverClassName=com.mysql.jdbc.Driver ds2.jdbc.url=jdbc:mysql://localhost:3306/process?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull ds2.jdbc.username=root ds2.jdbc.password=root
2、applicationContext.xml
<?xmlversion="1.0"encoding="UTF-8"?>
<beansxmlns="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:propertiesid="db"location="classpath:mysql.properties"/>
<!--配置数据源-->
<beanname="dataSource1"init-method="init"destroy-method="close"parent="parentDatasource">
<propertyname="url"value="#{db['ds1.jdbc.url']}"/>
<propertyname="username"value="#{db['ds1.jdbc.username']}"/>
<propertyname="password"value="#{db['ds1.jdbc.password']}"/>
</bean>
</beans>
在代码中注入
方式一
1、config.properties
name=ricky age=27 password=root
2、applicationContext.xml
<!--使用注解注入properties中的值--> <beanid="config" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <propertyname="locations"> <list> <value>classpath:config.properties</value> </list> </property> <!--设置编码格式--> <propertyname="fileEncoding"value="UTF-8"></property> </bean>
3、使用@Value注解
packagecom.ricky.codelab.springmvc.domain;
importorg.springframework.beans.factory.annotation.Value;
importorg.springframework.stereotype.Component;
/**
*${DESCRIPTION}
*
*@authorRickyFung
*@create2016-08-0815:49
*/
@Component("userService")
publicclassUserServiceImplimplementsIUserService{
privatefinalLoggerlogger=LoggerFactory.getLogger(getClass());
@Value("#{config[name]}")
privateStringname;
@Value("#{config[age]}")
privateIntegerage;
@Value("#{config[password]}")
privateStringpassword;
@Override
publicvoidlogin(Stringusername){
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毛票票。