谈谈Spring 注入properties文件总结
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2024-03-07 15:02:45
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
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
<?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/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-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
# 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
<?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
name=ricky age=27 password=root
2、applicationcontext.xml
<!-- 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
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。
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