Mybatis自動生成mapper.xml dao層代碼

1.建立一個maven工程

2.在pom.xml導入mybatis自動生成代碼插件

 <!-- mybatis generator 自動生成代碼插件 -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.6</version>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/generator/config.xml</configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
            </plugin>

3.建立mybatis-config.xml配置自動生成插件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
    <!-- 數據庫驅動:選擇你的本地硬盤上面的數據庫驅動包mysql-connector-java-5.1.39 -->
    <classPathEntry    location="D:\repo\mysql\mysql-connector-java\5.1.6\mysql-connector-Java-5.1.6.jar" />
    <context id="DB2Tables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="true" />
            <!-- 是否去除自動生成的注釋 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        <!--數據庫鏈接URL，用戶名、密碼 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"    connectionURL="jdbc:mysql://ip:3306/db?useSSL=false&amp;useUnicode=true&amp;characterEncoding=utf-8&amp;serverTimezone=GMT%2B8" userId="user" password="pwd"/>
        <!-- 類型轉換 -->  
        <javaTypeResolver>
            <!-- 是否使用bigDecimal， false可自動轉化以下類型（Long, Integer, Short, etc.） -->
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>
        <!-- 生成模型的包名和位置 -->
        <javaModelGenerator targetPackage="com.eastcom.bas.entity"    targetProject="src/main/java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>
        <!-- 生成映射文件的包名和位置 -->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>
        <!-- 生成DAO的包名和位置 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.eastcom.bas.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>
        <!-- 要生成的表 tableName是數據庫中的表名或視圖名 domainObjectName是實體類名 -->
        <table tableName="tb_user" domainObjectName="User"    enableCountByExample="false" enableUpdateByExample="false"    enableDeleteByExample="false" enableSelectByExample="false"    selectByExampleQueryId="false">
          <property name="useActualColumnNames" value="false"/>
        </table>
    </context>
</generatorConfiguration>

4.運行執行mybatis-config.xml

執行步驟：maven bulid -> mybatis-generator:generate -e