系统架构调整(一) Druid整改

原配置结构为spring+maven profile整合，现在整改也在此基础上做调整

1. 项目pom.xml ，增加druid依赖 

        <!-- alibaba -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>0.2.23</version>
        </dependency>    

 2. 在config资源文件夹下新增不同环境的jdbc配置文件，这里举例为

jdbc-develop.properties

jdbc-test.properties

jdbc-product.properties，每个文件内容均为如下

## JDBC set
jdbc.url=jdbc:oracle:thin:@192.168.xx.x:1521:oracle
jdbc.username=pjm
jdbc.password=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx+Zu1xI4coeWXqOJYBCwxqoHnmc+D9Lhoku5lSphi3ZvOJ0tJ6rzzA==

这里采用密码加密，解决机制在3中配置，加密方法如下：

cmd命令:
❶、进入druid-0.2.23.jar包所在目录（这里用的druid为0.2.23版本）
❷、在命令行中执行如下命令：pwd为需要加密的密码

java -cp druid-0.2.23.jar com.alibaba.druid.filter.config.ConfigTools pwd

输出加密结果

3. 项目中新增druid-profile.xml，注意红字标出，配置数据库连接、配置文件、最后跟上profiles定；filters(stat)为性能监控

<?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"
    xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
    xsi:schemaLocation=" 
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.1.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd"
    default-lazy-init="true">

    <description>各环境数据库配置 </description>

    <beans profile="develop">
        <context:property-placeholder location="classpath*:jdbc-develop.properties" />
        <!-- 基于Druid数据库链接池的数据源配置 -->
        <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
            init-method="init" destroy-method="close">
            <!-- 基本属性driverClassName、 url、user、password -->
            <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
            <property name="url" value="${jdbc.url}" />
            <property name="username" value="${jdbc.username}" />
            <property name="password" value="${jdbc.password}" />
            <!-- 配置初始化大小、最小、最大 -->
            <!-- 通常来说，只需要修改initialSize、minIdle、maxActive -->
            <property name="initialSize" value="2" />
            <property name="minIdle" value="2" />
            <property name="maxActive" value="30" />
            <property name="testWhileIdle" value="true" />

            <!-- 配置获取连接等待超时的时间 -->
            <property name="maxWait" value="5000" />
            <!-- 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="30000" />
            <!-- 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" />
            <!-- 解密密码必须要配置的项/性能监控 -->
            <property name="filters" value="config,stat" />
            <property name="connectionProperties" value="config.decrypt=true" />
        </bean>
    </beans>
    <beans profile="product">
        <context:property-placeholder location="classpath*:jdbc-production.properties" />
        …

        <!-- 同上设置 -->
    </beans>
    <beans profile="test">
        <context:property-placeholder location="classpath*:jdbc-test.properties" />
        …

        <!-- 同上设置 -->
        </bean>
    </beans>
    <beans profile="develop,test,product"></beans>
</beans>  

或者以下格式

<description>各环境数据库配置 </description>

    <beans profile="develop">
        <context:property-placeholder location="classpath*:jdbc-develop.properties" />
    </beans>
    <beans profile="product">
        <context:property-placeholder location="classpath*:jdbc-product.properties" />
    </beans>
    <beans profile="test">
        <context:property-placeholder location="classpath*:jdbc-test.properties" />
    </beans>
    <beans profile="develop,test,product">
    <!-- 基于Druid数据库链接池的数据源配置 -->
        <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
            init-method="init" destroy-method="close">
            <!-- 基本属性driverClassName、 url、user、password -->
            <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
            <property name="url" value="${jdbc.url}" />
            <property name="username" value="${jdbc.username}" />
            <property name="password" value="${jdbc.password}" />
            <!-- 配置初始化大小、最小、最大 -->
            <!-- 通常来说，只需要修改initialSize、minIdle、maxActive -->
            <property name="initialSize" value="2" />
            <property name="minIdle" value="2" />
            <property name="maxActive" value="30" />
            <property name="testWhileIdle" value="true" />

            <!-- 配置获取连接等待超时的时间 -->
            <property name="maxWait" value="5000" />
            <!-- 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="30000" />
            <!-- 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" />
            <!-- 解密密码必须要配置的项/性能监控 -->
            <property name="filters" value="config,stat" />
            <property name="connectionProperties" value="config.decrypt=true" />
        </bean>
    </beans>

4. 删除原database.xml配置

5. 项目web.xml中添加红字信息，如果不需要监控，去除即可

<!-- 加载配置文件 -->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:spring/*.xml</param-value>
</context-param>

<!-- 定义环境参数 -->
<context-param>
    <param-name>spring.profiles.active</param-name>
    <param-value>develop</param-value>
</context-param>

<!-- 定义druid监控 start -->
<servlet>
    <servlet-name>DruidStatView</servlet-name>
    <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>DruidStatView</servlet-name>
    <url-pattern>/druid/*</url-pattern>
</servlet-mapping>
<!-- 定义druid监控 end –>

好了，搞定~查看监控地址为：http://localhost:8080/project/druid/sql.html