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  • 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

    <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>srcmain
    esourcesgeneratorConfig.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>
    View Code

      Ⅲ、添加 generatorConfig.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="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>
    View Code

      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 

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  • 原文地址:https://www.cnblogs.com/WarBlog/p/15001049.html
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