Question

如何使用mybatis 自动生成代码

Answer 1

利用mybatis-generator自动生成代码
一、在pom.xml中添加plugin
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<configurationFile>src/main/resources/mybatis-generator/generatorConfig.xml</configurationFile>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
<executions>
<execution>
<id>Generate MyBatis Artifacts</id>
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
</plugin>
其中generatorConfig.xml的位置，自行调整。
二、generatorConfig.xml配置文件
<?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>
<classPathEntry
location="C:/Oracle/Middleware/wlserver_10.3/server/lib/ojdbc6.jar"/>
<context id="my" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressDate" value="false"/>
<property name="suppressAllComments" value="true"/>
</commentGenerator>

<jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver"
connectionURL="jdbc:oracle:thin:@172.20.16.***:1521:CARGO" userId="***"
password="***"/>

<javaModelGenerator targetPackage="ctas.test.entity"
targetProject="D:/yangjm/Code/CTAS/JAVAEE/CTAS2CCSP/src/main/java">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>

<sqlMapGenerator targetPackage="ctas.test.entity.xml"
targetProject="D:/yangjm/Code/CTAS/JAVAEE/CTAS2CCSP/src/main/java">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>

<javaClientGenerator targetPackage="ctas.test.mapper"
targetProject="D:/yangjm/Code/CTAS/JAVAEE/CTAS2CCSP/src/main/java" type="XMLMAPPER">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>

<!--<table tableName="T_FEE_AGTBILL" domainObjectName="FeeAgentBill"
enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false"
selectByExampleQueryId="false"/>-->

<table tableName="CTAS_FEE_BASE" domainObjectName="FeeBase"
enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false"
selectByExampleQueryId="false">
<!--<columnRenamingRule searchString="^D_"
replaceString=""/>-->
</table>

</context>
</generatorConfiguration>
几个要点：
a) 因为生成过程中需要连接db，所以第3行指定了驱动jar包的位置
b) 15-17行为连接字符串
c) 19-33行指定生成“entity实体类、mybatis映射xml文件、mapper接口”的具体位置
d) 40-46行为具体要生成的表，如果有多个表，复制这一段，改下表名即可
三、使用方式
mvn mybatis-generator:generate
如果是在intellij 环境，直接鼠标点击即可