mybatis代码自动生成
方法一(通过本地驱动包和maven）
1.修改pom.xml
确认已添加mybatis相关依赖
<dependencies>
...
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.0</version>
</dependency>
...
</dependencies>
在build内添加mybatis-generator-maven-plugin插件
<build>
...
<plugins>
<!-- mybatis generator 自动生成代码插件 -->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<configurationFile>${
basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
</plugin>
</plugins>
</build>
2.新建配置文件generatorConfig.xml
配置文件需要替换为自己的几处：
- 本地硬盘数据驱动包（需要自己找
mysql-connector-java-5.1.25.jar）位置classPathEntry ->location - 数据库url及用户名和密码
jdbcConnection ->connectionURL、userId、sword - 生成模型的包名和位置
javaModelGenerator ->targetPackage - 生成映射文件的包名和位置
sqlMapGenerator ->targetPackage - 生成DAO的包名和位置
javaClientGenerator ->targetPackage - 要生成的表
table
详细配置可见：Mybatis Generator最完整配置详解
<?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>
<!-- 数据库驱动:选择你的本地硬盘上面的数据库驱动包-->
<classPathEntry location="D:\working\tools\mybatis-generator\mysql-connector-java-5.1.25.jar" />
<context id="mysqlTable" 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="false" />
</commentGenerator>
<!--数据库链接URL，用户名、密码 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1:3306/5g_city" userId="admin" sword="123"></jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 生成模型的包名和位置-->
<javaModelGenerator targetPackage="cn.chinaunicom.intelligenceinsight.model" 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="mapping" targetProject="src/main/resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 生成DAO的包名和位置-->
<javaClientGenerator type="XMLMAPPER" targetPackage="cn.chinaunicom.intelligenceinsight.mapper" targetProject="src/main/java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名-->
<table tableName="table_a" domainObjectName="TableA"></table>
<table tableName="table_b"></table>
</context>
</generatorConfiguration>
3.通过maven命令执行
自动生成的文件位置
方法二（tk.mybatis和mybatis-generator-core）
1.修改pom.xml
增添相关依赖
<dependencies>
...
<!--mybatis-->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
<!--mapper-->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>2.1.5</version>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.2</version>
<scope>compile</scope>
<optional>true</optional>
</dependency>
...
</dependencies>
2.tk.mybatis（继承自己的MyMapper）
package com.lorogy.sprongboot.demo.utils;
import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;
public interface MyMapper<T> extends Mapper<T>, MySqlMapper<T> {
//TODO
//FIXME 特别注意，该接口不能被扫描到，否则会出错
}
3.新建配置文件generatorConfig.xml
- MyMapper位置
tk.mybatis-->mappers - 数据库及账密
- pojo所在包
- mapper所在目录
- mapper对应的java映射
- 需要自动生成的表table
<?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="MysqlContext" targetRuntime="MyBatis3Simple" defaultModelType="flat">
<property name="beginningDelimiter" value="`"/>
<property name="endingDelimiter" value="`"/>
<plugin type="tk.mybatis.mapper.generator.MapperPlugin">
<property name="mappers" value="com.lorogy.sprongboot.demo.utils.MyMapper"/>
</plugin>
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://X.X.X.X:33306/test"
userId="admin"
password="1234">
</jdbcConnection>
<!-- 对于生成的pojo所在包 -->
<javaModelGenerator targetPackage="com.lorogy.sprongboot.demo.model" targetProject="src/main/java"/>
<!-- 对于生成的mapper所在目录 -->
<sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"/>
<!-- 配置mapper对应的java映射 -->
<javaClientGenerator targetPackage="com.lorogy.sprongboot.demo.mapper" targetProject="src/main/java" type="XMLMAPPER"/>
<table tableName="sys_user"></table>
</context>
</generatorConfiguration>
4.执行文件，运行该文件即可自动生成
package com.lorogy.sprongboot.demo.utils;
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 GeneratorDisplay {
public void generator() throws Exception{
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
//指定 逆向工程配置文件
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);
}
public static void main(String[] args) throws Exception {
try {
GeneratorDisplay generatorSqlmap = new GeneratorDisplay();
generatorSqlmap.generator();
} catch (Exception e) {
e.printStackTrace();
}
}
}