Mybatis逆向工程
Mybatis逆向工程
1、什么是Mybatis逆向工程
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mybatis逆向工程是一个可以快速根据数据库表帮我们生成pojo实体类和mapper接口和mapper映射文件的一个插件,需要下载该项目。
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注意:只支持单表操作(单表的增删改查等sql可以帮助我们生成),关联查询需要自己写。
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建议查阅tk-mybatis 更加好用的工具。
2、引入依赖pom.xml
点击查看代码
<dependencies>
<!--mybatis逆向工程-->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.7</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.21</version>
</dependency>
</dependencies>
3、配置文件的配置generatorConfig.xml
点击查看代码
<?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>
<!--指定了驱动jar包的位置,这个是针对下载Jar包的方式,因为用了maven所以这个就用不上了-->
<!-- <classPathEntry location="D:/mvn_repository_new/mysql/mysql-connector-java/5.1.45/mysql-connector-java-5.1.45.jar"/>-->
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressDate" value="false"/>
<!-- 是否去除自动生成的注释 true:是 : false:否 -->
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!--数据库链接URL,用户名、密码 -->
<jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/online?useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true"
userId="root"
password="mc123456">
</jdbcConnection>
<!--指定生成entity实体类的具体位置-->
<javaModelGenerator targetPackage="com.mc.entity" targetProject="./src/main/java">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!--指定生成mybatis映射xml文件的包名和位置-->
<sqlMapGenerator targetPackage="mapper" targetProject="./src/main/resources">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<!--指定生成mapper接口的具体位置-->
<javaClientGenerator targetPackage="com.mc.mapper" targetProject="./src/main/java" type="XMLMAPPER">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<!--要生成entity/mapper的表名及自定义的DO名-->
<!--<table tableName="users" domainObjectName="User"/>-->
<!--<table tableName="product_brand" domainObjectName="ProductBrand" />-->
<!--mybatis generator代码生成器在默认的情况下会生成对于表实体类的一个Examle类, 可以更改生成器的配置可避免生成Examle类,
enableCountByExample,enableUpdateByExample,enableDeleteByExample,enableSelectByExample等配置为false后, 就不会生成生成Examle类了 -->
<table tableName="t_bis_wallet" enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"/>
<!--或者直接写表名-->
<!--<table schema="" tableName="product_type"></table>-->
</context>
</generatorConfiguration>
4、配置Generator的插件pom.xml
点击查看代码
<build>
<plugins>
<!-- mybatis逆向工程插件 -->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.7</version>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.21</version>
</dependency>
</dependencies>
<configuration>
<!--配置文件的路径-->
<configurationFile>src/main/resources/generator/generatorConfig.xml</configurationFile>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
<resources>
<resource>
<includes>
<include>**/*.*</include>
</includes>
<directory>src/main/resources</directory>
</resource>
</resources>
</build>
5、进行单元测试
点击查看代码
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath*:spring-context*.xml")
public class TestGenerator {
@Autowired
TBusinessMapper tBusinessMapper;
@Test
public void testInsertBusiness(){
TBusiness tBusiness = new TBusiness();
tBusiness.setBsId(2L);
tBusiness.settBsId(2L);
tBusiness.setBsName("海尔冰箱");
tBusiness.setTbId(2L);
tBusinessMapper.insert(tBusiness);
}
}
6、编写启动程序
点击查看代码
package com.mybatisTools;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.api.ProgressCallback;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
public class GeneratorSqlmap {
public GeneratorSqlmap() {
}
public void generator() throws Exception {
List<String> warnings = new ArrayList();
boolean overwrite = true;
File configFile = new File("src/main/resources/generator/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((ProgressCallback)null);
}
public static void main(String[] args) throws Exception {
try {
GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap();
generatorSqlmap.generator();
} catch (Exception var2) {
var2.printStackTrace();
}
}
}
也可以双击图中位置启动