spring读取properties文件

配置文件中加载properties文件

标签，可以用来加载properties配置文件，location是配置文件的路径。

jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test?user=root&password=123456&useUnicode=true&characterEncoding=UTF-8
<context:property-placeholder location="classpath:mysql.properties"/>
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        ...
    </bean>

代码中取properties文件中的值

使@Value注解取值。

task.cron.clean_token=0 0 3 * * ?
<?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: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">
    <bean id="appProperty" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <array>
                <value>classpath:config/property/task_schedule.properties</value>
            </array>
        </property>
    </bean>
    <!-- 或者用下面的简写 -->
    <!--<context:property-placeholder-->
            <!--location="classpath:config/property/task_schedule.properties"-->
</beans>
public class TokenClearJob implements SchedulingConfigurer { 
    @Value("${task.cron.clean_token}")
    private String TASK_CRON_CLEAN_TOKEN;
  ...
}