Druid连接池自定义数据库密码加解密的实现

1、首先配置Druid的数据库连接池

<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

<!-- 引入jdbc配置文件 -->
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath*:jdbc.properties</value>
</list>
</property>
</bean>

<!--数据源加密操作 -->
<bean id="dbPasswordCallback" class="com.waukeen.util.DBPasswordCallback"
lazy-init="true" />

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
init-method="init" destroy-method="close" lazy-init="true">
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<property name="driverClassName" value="${driver}" />
<property name="initialSize" value="${initialSize}" />
<property name="maxActive" value="${maxActive}" />
<property name="maxWait" value="${maxWait}" />
<property name="filters" value="stat" />
<property name="connectionProperties" value="password=${password}" />
<property name="passwordCallback" ref="dbPasswordCallback" />
</bean>

</beans>

2、创建DruidPasswordCallback子类

         创建DBPasswordCallback类继承DruidPasswordCallback，并重写setProperties方法

package com.waukeen.util;

import java.util.Properties;

import com.alibaba.druid.util.DruidPasswordCallback;
import com.waukeen.security.Encode;

/**
* 数据库回调密码解密
*
* @author
*
*/
@SuppressWarnings("serial")
public class DBPasswordCallback extends DruidPasswordCallback {

public void setProperties(Properties properties) {
super.setProperties(properties);
String password = properties.getProperty("password");
if (!Tools.isEmpty(password)) {
// 解密数据库连接密码
String pwd = Encode.decode(password);
setPassword(pwd.toCharArray());
}
}

public static void main(String[] args) {
// 生成加密后的密码，放到jdbc.properties
String pwd = Encode.encode("pwd");
System.out.println(pwd);
}
}

3、jdbc.properties的内容

#数据库连接地址
url=jdbc:mysql://127.0.0.1:3306/test
#用户名
username=root
#密码，这里的密码是你加密之后的密码！！！
password=XXXXX
#数据库连接驱动类
driver=com.mysql.jdbc.Driver
#定义初始连接数
initialSize=10
#定义最大连接数
maxActive=12
#定义最长等待时间
maxWait=5000

4、需要注意的地方

<!--数据源加密操作 -->
<bean id="dbPasswordCallback" class="com.waukeen.util.DBPasswordCallback" lazy-init="true" />

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
init-method="init" destroy-method="close" lazy-init="true">
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<property name="driverClassName" value="${driver}" />
<property name="initialSize" value="${initialSize}" />
<property name="maxActive" value="${maxActive}" />
<property name="maxWait" value="${maxWait}" />
<property name="filters" value="stat" />
<!--传递password加密后的值到DBPasswordCallback，不能遗漏 -->
<property name="connectionProperties" value="password=${password}" />
<property name="passwordCallback" ref="dbPasswordCallback" />
</bean>