MyBatis Generator简单使用方法

文章目录

添加配置文件

1. 在项目resource目录下创建mybatis-generator文件夹
   
2. 在文件夹下创建generatorConfig.xml，配置需要生成代码的数据表

<?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>
    <properties resource="mybatis-generator/generator.properties"/>
    <!--    连接数据库jar包的路径-->
    <!--<classPathEntry location="d:/java/JavaTools/mysql-connector-java-5.1.48/mysql-connector-java-5.1.48-bin.jar"/>-->
    <context id="DB2Tables"  targetRuntime="MyBatis3">
        <commentGenerator>
            <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>

        <!--数据库连接参数 -->
        <jdbcConnection
                driverClass="${driverClassName}"
                connectionURL="${url}"
                userId="${username}"
                password="${password}">
        </jdbcConnection>

        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- 实体类的包名和存放路径 -->
        <javaModelGenerator targetPackage="com.shop.order.bean" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!-- 生成映射文件*.xml的位置-->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!-- 生成DAO的包名和位置 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.shop.order.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!-- tableName：数据库中的表名或视图名；domainObjectName：生成的实体类的类名-->
        <table tableName="book" domainObjectName="Book"
               enableCountByExample="false"
               enableUpdateByExample="false"
               enableDeleteByExample="false"
               enableSelectByExample="false"
               selectByExampleQueryId="false"/>
        <!-- 可以添加多个需要生产代码的实体-->
        <!--
                <table tableName="xxx" domainObjectName="xxx"
                       enableCountByExample="false"
                       enableUpdateByExample="false"
                       enableDeleteByExample="false"
                       enableSelectByExample="false"
                       selectByExampleQueryId="false"/>
                ...
                <table tableName="xxx" domainObjectName="xxx"
                       enableCountByExample="false"
                       enableUpdateByExample="false"
                       enableDeleteByExample="false"
                       enableSelectByExample="false"
                       selectByExampleQueryId="false"/>
        -->
    </context>
</generatorConfiguration>

3. 在文件夹下创建generator.properties配置文件

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/store?useUnicode=true&characterEncoding=UTF-8&relaxAutoCommit=true&zeroDateTimeBehavior=convertToNull
username=root
password=root

配置Maven

pom.xml中引入依赖

<build>
        <plugins>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.5</version>
                <configuration>
                    <configurationFile>src/main/resources/mybatis-generator/generatorConfig.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
                <executions>
                    <execution>
                        <id>Generate MyBatis Artifacts</id>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.5</version>
                    </dependency>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.30</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

执行Maven插件

1. 双击运行mybatis-generator:generate
   
2. 控制台输出结果，生产mapper和bean文件