MyBatis代码自动生成器Mybatis-Generator的使用详解

<?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>
	<properties resource="application.yml"></properties>
	<classPathEntry location="F:\apache-maven-3.5.4\LocalHouse\mysql\mysql-connector-java\5.1.46\mysql-connector-java-5.1.46.jar"/>
	<context id="test" targetRuntime="MyBatis3">
		<plugin type="org.mybatis.generator.plugins.EqualsHashCodePlugin"></plugin>
		<plugin type="org.mybatis.generator.plugins.SerializablePlugin"></plugin>
		<plugin type="org.mybatis.generator.plugins.ToStringPlugin"></plugin>
		<commentGenerator>
			<!-- 这个元素用来去除指定生成的注释中是否包含生成的日期 false:表示保护 -->
			<!-- 如果生成日期，会造成即使修改一个字段，整个实体类所有属性都会发生变化，不利于版本控制，所以设置为true -->
			<property name="suppressDate" value="true" />
			<!-- 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://localhost/demo"
						userId="root"
						password="123456">
		</jdbcConnection>
		<javaTypeResolver>
			<!-- This property is used to specify whether MyBatis Generator should 
                force the use of java.math.BigDecimal for DECIMAL and NUMERIC fields, -->
			<property name="forceBigDecimals" value="false" />
		</javaTypeResolver>
		 <!-- targetpakage是即将生成的目录，targetProject是对应的前缀目录。可根据自己需求生到对应目录。下次运行会直接默认覆盖原来位置的文件 -->
		<!-- 生成模型的包名和位置   映射实体类的位置 -->
		<javaModelGenerator targetPackage="com.sbproject.sb.common.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  mapper.xml -->
		<sqlMapGenerator targetPackage="com.sbproject.sb.common.dao.mapper"
						 targetProject="src/main/java">
			<property name="enableSubPackages" value="true" />
		</sqlMapGenerator>
		<!-- 生成DAO的包名和位置   mapper接口-->
		<javaClientGenerator type="XMLMAPPER" targetPackage="com.sbproject.sb.common.dao"
							 targetProject="src/main/java">
			<property name="enableSubPackages" value="true" />
		</javaClientGenerator>

		<!-- 要生成哪些表  orders是我的表名，Orders是生成的类名，比如我的映射类为Order，映射接口OrderMapper, 映射文件为OrderMapper.xml，可以添加多个表，里面的几个配置大概意思就是是否允许生成example文件和支持selectByExample。用过Mybatis的应该知道selectByExample，对于一些简单查询用这个还是比较方便的。哈哈、话有点多，记得删除 -->
		<table tableName="orders" domainObjectName="Orders"
			   enableCountByExample="true" enableUpdateByExample="true"
			   enableDeleteByExample="true" enableSelectByExample="true"
			   selectByExampleQueryId="true"></table>
		<!-- 要生成哪些表  -->
		<table tableName="products" domainObjectName="Products"
			   enableCountByExample="true" enableUpdateByExample="true"
			   enableDeleteByExample="true" enableSelectByExample="true"
			   selectByExampleQueryId="true"></table>
	</context>
</generatorConfiguration>

<plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.5</version>
                <configuration>
                    <configurationFile>src/main/resources/mybatis-generator/mybatis-generator-cfg.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>
                </dependencies>
            </plugin>

mybatis-generator:generate -e

public interface OrdersMapper {
   /**
     * This method was generated by MyBatis Generator.
     * This method corresponds to the database table orders
     *
     * @mbg.generated
     */
    long countByExample(OrdersExample example);

    int deleteByExample(OrdersExample example);

    int deleteByPrimaryKey(String id);

    int insert(Orders record);

    int insertSelective(Orders record);

    List<Orders> selectByExample(OrdersExample example);

    Orders selectByPrimaryKey(String id);

    int updateByExampleSelective(@Param("record") Orders record, @Param("example") OrdersExample example);

    int updateByExample(@Param("record") Orders record, @Param("example") OrdersExample example);

    int updateByPrimaryKeySelective(Orders record);

    int updateByPrimaryKey(Orders record);
}

<?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>2.3.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.springbootMybatis</groupId>
    <artifactId>sbm</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>sbm</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-commons</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web-services</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.46</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-commons</artifactId>
            <version>2.1.5.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <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>1.3.5</version>
                <configuration>
                    <configurationFile>src/main/resources/mybatis-generator/mybatis-generator-cfg.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
                <executions>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.5</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

</project>