Spring PropertyPlaceholderConfigurer数据库配置

pom.xml中添加依赖

<!-- mysql-connector-java -->
<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <version>5.1.38</version>
</dependency>

<!-- druid -->
<dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>druid</artifactId>
  <version>1.0.20</version>
</dependency>

属性配置文件：system-config.properties

################################################
# DataSource Config
jdbc.url=jdbc\:mysql\://127.0.0.1:3306/quartz?useUnicode\=true&characterEncoding\=utf8&autoReconnect\=true&useSSL\=false&zeroDateTimeBehavior\=convertToNull
jdbc.username=root
jdbc.publicKey=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBALIT9sFn8U+Hoo80Q+Hepwc0ZN6HBiyAW4SiLCXLhNNjxB45mtRamABoB0O9dEsziT/gwtuXMuC2bWePdCvEb1ECAwEAAQ==
jdbc.password=fCHxOiDBDsWY/BJLg05fbNGvQmDRPZJufcvyqCqml+zwmB4Gw/Bn7lzy8w117CQ1jEBFpj0ERgQsCBJD0ROfJw==

applicationContext.xml配置文件

<?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">

    <!-- 只需要加载service、dao即可，不需要加载controller -->
    <context:component-scan base-package="com.quartz">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
        <context:exclude-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice" />
    </context:component-scan>

    <!-- 占位符 -->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:system-config.properties</value>
            </list>
        </property>
    </bean>

    <!-- 防SQL注入过滤器 -->
    <bean id="wall-filter" class="com.alibaba.druid.wall.WallFilter">
        <property name="dbType" value="mysql" />
    </bean>
    <!-- 监控信息过滤器 -->
    <bean id="stat-filter" class="com.alibaba.druid.filter.stat.StatFilter">
        <!-- slowSqlMillis用来配置SQL慢的标准，执行时间超过slowSqlMillis的就是慢。 -->
        <property name="slowSqlMillis" value="10000" />
        <property name="logSlowSql" value="true" />
        <property name="mergeSql" value="true" />
    </bean>

    <!-- 数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <!-- 基本属性 url、user、password -->
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <!-- 密码加密 -->
        <property name="filters" value="config" />
        <property name="connectionProperties" value="config.decrypt=true;config.decrypt.key=${jdbc.publicKey}" />
        <property name="password" value="${jdbc.password}" />

        <!-- 配置初始化大小、最小、最大 -->
        <property name="initialSize" value="5" />
        <property name="minIdle" value="5" />
        <property name="maxActive" value="30" />

        <!-- 配置获取连接等待超时的时间 -->
        <property name="maxWait" value="60000" />

        <!-- 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="300000" />

        <property name="validationQuery" value="SELECT 'x'" />
        <property name="testWhileIdle" value="true" />
        <property name="testOnBorrow" value="false" />
        <property name="testOnReturn" value="false" />

        <!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
        <property name="poolPreparedStatements" value="false" />
        <property name="maxPoolPreparedStatementPerConnectionSize" value="20" />

        <!-- 超过时间限制是否回收 -->
        <property name="removeAbandoned" value="true" />
        <!-- 超时时间；单位为秒。180秒=3分钟 -->
        <property name="removeAbandonedTimeout" value="180" />
        <!-- 关闭abanded连接时输出错误日志 -->
        <property name="logAbandoned" value="true" />
        <property name="proxyFilters">
            <list>
                <!-- 监控信息过滤器 -->
                <ref bean="stat-filter" />
                <!-- 防注入的话从前台传排序字段排序不好用 -->
                <ref bean="wall-filter" />
            </list>
        </property>
    </bean>

</beans>