mybatis加密数据库信息

1.配置MyBatisConfig.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>  <!-- 驼峰式命名 -->
<!--        <setting name="logImpl" value="STDOUT_LOGGING"/>-->
        <setting name="cacheEnabled" value="true"/>
        <!-- cacheEnabled是二是级缓存的总开关，置为false代表关闭二级缓存 -->
        <setting name="localCacheScope" value="STATEMENT"/>
        <!-- localCacheScope是本地缓存（一级缓存）的作用域，只有两种取值：SESSION和STATEMENT，取STATEMENT意味着关闭一级缓存-->
        <setting name="callSettersOnNulls" value="true"/>
        <!-- null 也要这个key -->
    </settings>

    <environments default="development">
        <!--        默认-->
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${driver}"/>
                <property name="url" value="${url}"/>
                <property name="username"  value="${username}"/>
                <property name="password" value="${password}"/>
                <property name="poolPingEnabled" value="true"/>
                <property name="poolPingConnectionsNotUsedFor" value="