场景
MybatisGenerator 官方文档
http://www.mybatis.org/generator/configreference/xmlconfig.html
实现
项目搭建好完整的包,包括bean、dao、service、test、utils、mapper
项目目录
此为生成完代码之后的目录
数据库配置
在数据库ssm_crud中新建表tbl_emp(员工表)
再新建tbl_dept表(部门表)
两个表建立外键关联
逆向工程
首先需要引入逆向工程相关依赖
打开Maven中央仓库,搜索mybatis generator
点进去,选择1.3.7版本
将其复制到pom.xml中
代码为:
<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
<!-- MBG -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.7</version>
</dependency>
根据官方文档说明
需要一个配置文件,在与pom.xml同级目录下我们新建mbg.xml,用于配置逆向工程。
官方实例文档:
<?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="/Program Files/IBM/SQLLIB/java/db2java.zip" />
<context id="DB2Tables" targetRuntime="MyBatis3">
<jdbcConnection driverClass="COM.ibm.db2.jdbc.app.DB2Driver"
connectionURL="jdbc:db2:TEST"
userId="db2admin"
password="db2admin">
</jdbcConnection>
<javaTypeResolver >
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<javaModelGenerator targetPackage="test.model" targetProject="\MBGTestProject\src">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<sqlMapGenerator targetPackage="test.xml" targetProject="\MBGTestProject\src">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<javaClientGenerator type="XMLMAPPER" targetPackage="test.dao" targetProject="\MBGTestProject\src">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<table schema="DB2ADMIN" tableName="ALLTYPES" domainObjectName="Customer" >
<property name="useActualColumnNames" value="true"/>
<generatedKey column="ID" sqlStatement="DB2" identity="true" />
<columnOverride column="DATE_FIELD" property="startDate" />
<ignoreColumn column="FRED" />
<columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" />
</table>
</context>
</generatorConfiguration>
这里具体的配置文件内筒mbg.xml
<?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>
<context id="DB2Tables" targetRuntime="MyBatis3">
<!-- 设置生成的代码不带注释 为true时则不带那么多注释-->
<commentGenerator>
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 配置数据库连接 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/ssm_crud" userId="root"
password="123">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 将下面的位置改成自己的包名以及位置 -->
<!-- 指定javaBean生成的位置 -->
<javaModelGenerator targetPackage="com.badao.ssm.bean"
targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!--指定sql映射文件生成的位置 -->
<sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 指定dao接口生成的位置,mapper接口 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.badao.ssm.dao" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- table指定每个表的生成策略 -->
<!-- tableName 对应数据库中的表名,domainObjectName对应要生成的实体类的类名 -->
<table tableName="tbl_emp" domainObjectName="Employee"></table>
<table tableName="tbl_dept" domainObjectName="Department"></table>
</context>
</generatorConfiguration>
生成代码
根据官方文档说明,选择Running Mybatis Generator With Java
官方示例:
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("generatorConfig.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
在test包下新建MBGTest.java,用于生成代码
package com.badao.ssm.test;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
public class MBGTest {
public static void main(String[] args) throws Exception {
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("mbg.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
callback, warnings);
myBatisGenerator.generate(null);
}
}
运行
右键run as Java Application,选中项目,右键refresh,刷新,可以看到相应代码已经生成。
源码下载
https://download.csdn.net/download/badao_liumang_qizhi/10868928