mybatis 逆向工程 maven
mybatis 逆向工程:mybatis官方提供逆向工程 可以针对单表自动生成mybatis执行所需要的代码(mapper.java,mapper.xml、po..)
逆向工程开发有两种方式:1、通过Java工程,2、通过maven工程
一、Java工程(不做详细说明)
下载地址:https://github.com/mybatis/generator/releases
下载解压
二、maven工程
Ⅰ、创建maven工程
Ⅱ、添加依赖
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.xxx.marw</groupId> <artifactId>mybatis-generator</artifactId> <version>0.0.1-SNAPSHOT</version> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.26</version> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.4.0</version> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.4.0</version> </dependency> </dependencies> <!--mybatis.generator逆向工程,maven版本主要配置下面信息--> <build> <plugins> <!--maven插件--> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> <!--mybatis-generator插件--> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.4.0</version> <!--指定资源文件的路径--> <configuration> <configurationFile>src\main\resources\generatorConfig.xml</configurationFile> <verbose>true</verbose> <overwrite>true</overwrite> </configuration> <!--此插件需要依赖的jar包资源--> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.26</version> </dependency> </dependencies> </plugin> </plugins> </build> </project>
Ⅲ、添加 generatorConfig.xml
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<?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="testTables" targetRuntime="MyBatis3"> <commentGenerator> <!-- 是否去除自动生成的注释 true:是 : false:否 --> <property name="suppressAllComments" value="true" /> </commentGenerator> <!--数据库连接的信息:驱动类、连接地址、用户名、密码 --> <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver" connectionURL="jdbc:mysql://192.168.223.129:3306/mysql_db_char" userId="root" password="root"> </jdbcConnection> <!-- <jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:orcl" userId="scott" password="wcy675600920"> </jdbcConnection> --> <!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer,为 true时把JDBC DECIMAL 和 NUMERIC 类型解析为java.math.BigDecimal --> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!-- targetProject:生成PO类的位置 --> <javaModelGenerator targetPackage="com.xxx.marw.pojo" targetProject="src/main/java"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> <!-- 从数据库返回的值被清理前后的空格 --> <property name="trimStrings" value="true" /> </javaModelGenerator> <!-- targetProject:mapper映射文件生成的位置 --> <sqlMapGenerator targetPackage="com.xxx.marw.mapper" targetProject="src/main/resources"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> </sqlMapGenerator> <!-- targetPackage:mapper接口生成的位置 --> <javaClientGenerator type="XMLMAPPER" targetPackage="com.xxx.marw.mapper" targetProject="src/main/java"> <!-- enableSubPackages:是否让schema作为包的后缀 --> <property name="enableSubPackages" value="false" /> </javaClientGenerator> <!-- 指定数据库表 --> <table tableName="item" schema="" enableCountByExample="false" enableDeleteByExample="false" enableUpdateByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"> </table> <table tableName="orderdetail" schema="" enableCountByExample="false" enableDeleteByExample="false" enableUpdateByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"> </table> <table tableName="orders" schema="" enableCountByExample="false" enableDeleteByExample="false" enableUpdateByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"> </table> <table tableName="user" schema="" enableCountByExample="false" enableDeleteByExample="false" enableUpdateByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"> </table> <!-- 有些表的字段需要指定java类型 <table schema="" tableName=""> <columnOverride column="" javaType="" /> </table> --> </context> </generatorConfiguration>
Ⅳ、运行maven工程 (mybatis-generator:generate)
注意:1、pom配置的MySQL依赖jar包版本和MySQL服务版本要一致,查看MySQL版本:select version() from dual;
2、MySQL的驱动可能是这个:com.mysql.cj.jdbc.Driver