SpringBoot实现整合mybatis-generator-maven-plugin 1.4.0

创建 Maven 工程

网上有很多教程且 Idea 可以直接创建 这里就不进行

pom.xml 引入依赖和插件

pom中generalto-maven-plugs中必须指定mysql驱动,并且明确版本

<?xml version="1.0" encoding="UTF-8"?>
<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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>top.orginly</groupId>
    <artifactId>mall</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>mall</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>11</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.2.0</version>
        </dependency>
        <!-- mysql8 驱动 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.24</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <!-- springboot的maven插件 -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.4.0</version>
                <configuration>
                    <!-- mybatis用于生成代码的配置文件 如果配置文件名为generatorConfig.xml 则不需要配置 -->
                    <!-- <configurationFile>src/main/resources/generator/generatorConfig.xml</configurationFile>-->
                    <!-- 允许移动生成的文件 -->
                    <verbose>true</verbose>
                    <!-- 启用覆盖 -->
                    <overwrite>true</overwrite>
                </configuration>
                <!-- 引入插件所需要的依赖 -->
                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>8.0.24</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

</project>

generatorConfig.xml 自动生成配置文件

table标签中需要指定tableName和生成的实体名字

<?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">
        <commentGenerator>
            <!-- 是否生成注释代时间戳-->
            <property name="suppressDate" value="true"/>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <!--数据库链接地址账号密码-->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://172.17.0.2:3306/spring-boot-mall?useUnicode=true&amp;characterEncoding=UTF-8&amp;serverTimezone=Asia/Shanghai"
                        userId="root"
                        password="000">
        </jdbcConnection>
        <javaTypeResolver>
            <!--该属性可以控制是否强制DECIMAL和NUMERIC类型的字段转换为Java类型的java.math.BigDecimal,默认值为false，一般不需要配置。-->
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!--生成Model类存放位置-->
        <javaModelGenerator targetPackage="top.orginly.mall.model.pojo" targetProject="src/main/java">
            <!--enableSubPackages:如果true，MBG会根据catalog和schema来生成子包。如果false就会直接用targetPackage属性。默认为false。-->
            <property name="enableSubPackages" value="true"/>
            <!--trimStrings:是否对数据库查询结果进行trim操作，如果设置为true就会生成类似这样public void setUsername(String username) {this.username = username == null ? null : username.trim();}的setter方法。默认值为false。-->
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!--生成映射xml文件存放位置-->
        <sqlMapGenerator targetPackage="mappers" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!--生成Dao类存放位置(*Mapper.java)-->
        <!-- 客户端代码，生成易于使用的针对Model对象和XML配置文件 的代码
            type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象
            type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象
            type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口
        -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="top.orginly.mall.dao" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!--生成对应表及类名-->
        <table tableName="mall_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false"
               enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false">
            <!--useActualColumnNames:如果设置为true,那么MBG会使用从数据库元数据获取的列名作为生成的实体对象的属性。 如果为false(默认值)，MGB将会尝试将返回的名称转换为驼峰形式。 在这两种情况下，可以通过 元素显示指定，在这种情况下将会忽略这个（useActualColumnNames）属性。-->
            <property name="useActualColumnNames" value="true"/>
            <!-- 数据库表主键 可以不设置 -->
            <generatedKey column="id" sqlStatement="Mysql" identity="true"/>
        </table>

    </context>
</generatorConfiguration>

运行生成文件

这里推荐使用IDEA

我们只需要找到右边侧栏中的maven

依次找到 plugins–>mybatis-generaltor–>mybatis-generaltor:generaltor

之后双击即可,此时刷新一下项目就自动生成我们想要的,mapper和xml以及pojo

提示 BUILD SUCCESS 即生成成功！

[INFO] Scanning for projects...
[INFO]
[INFO] --------------------------< top.orginly:mall >--------------------------
[INFO] Building mall 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- mybatis-generator-maven-plugin:1.4.0:generate (default-cli) @ mall ---
[INFO] Connecting to the Database
[INFO] Introspecting table mall_user
[INFO] Introspecting table mall_category
[INFO] Introspecting table mall_goods
[INFO] Introspecting table mall_order
[INFO] Introspecting table mall_order_goods
[INFO] Introspecting table mall_cart
[INFO] Generating Primary Key class for table mall_user
[INFO] Generating Record class for table mall_user
[INFO] Generating Mapper Interface for table mall_user
[INFO] Generating SQL Map for table mall_user
[INFO] Generating Record class for table mall_category
[INFO] Generating Mapper Interface for table mall_category
[INFO] Generating SQL Map for table mall_category
[INFO] Generating Record class for table mall_goods
[INFO] Generating Mapper Interface for table mall_goods
[INFO] Generating SQL Map for table mall_goods
[INFO] Generating Primary Key class for table mall_order
[INFO] Generating Record class for table mall_order
[INFO] Generating Mapper Interface for table mall_order
[INFO] Generating SQL Map for table mall_order
[INFO] Generating Record class for table mall_order_goods
[INFO] Generating Mapper Interface for table mall_order_goods
[INFO] Generating SQL Map for table mall_order_goods
[INFO] Generating Record class for table mall_cart
[INFO] Generating Mapper Interface for table mall_cart
[INFO] Generating SQL Map for table mall_cart
[INFO] Saving file UserMapper.xml
[INFO] Saving file CategoryMapper.xml
[INFO] Saving file GoodsMapper.xml
[INFO] Saving file OrderMapper.xml
[INFO] Saving file OrderGoodsMapper.xml
[INFO] Saving file CartMapper.xml
[INFO] Saving file UserKey.java
[INFO] Saving file User.java
[INFO] Saving file UserMapper.java
[INFO] Saving file Category.java
[INFO] Saving file CategoryMapper.java
[INFO] Saving file Goods.java
[INFO] Saving file GoodsMapper.java
[INFO] Saving file OrderKey.java
[INFO] Saving file Order.java
[INFO] Saving file OrderMapper.java
[INFO] Saving file OrderGoods.java
[INFO] Saving file OrderGoodsMapper.java
[INFO] Saving file Cart.java
[INFO] Saving file CartMapper.java
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.193 s
[INFO] Finished at: 2021-06-01T22:33:37+08:00
[INFO] ------------------------------------------------------------------------