使用maven插件自动生成对应的实体类、mapper、xml文件

maven 依赖配置：

<!--  sql server   -->
<dependency>
   <groupId>com.microsoft.sqlserver</groupId>
   <artifactId>mssql-jdbc</artifactId>
   <version>6.1.0.jre8</version>
</dependency>
<!--  mysql   -->
<dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <scope>runtime</scope>
</dependency>

<dependency>
   <groupId>org.mybatis</groupId>
   <artifactId>mybatis</artifactId>
   <version>3.4.4</version>
</dependency>

<dependency>
   <groupId>org.mybatis</groupId>
   <artifactId>mybatis-spring</artifactId>
   <version>1.3.1</version>
</dependency>

<dependency>
   <groupId>org.mybatis.spring.boot</groupId>
   <artifactId>mybatis-spring-boot-starter</artifactId>
   <version>1.1.1</version>
</dependency>

构建所需插件

<build>
   <plugins>
      <plugin>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-maven-plugin</artifactId>
         <configuration>
            <fork>true</fork>
         </configuration>
      </plugin>
      <!-- mybatis generator 自动生成代码插件 -->
      <plugin>
         <groupId>org.mybatis.generator</groupId>
         <artifactId>mybatis-generator-maven-plugin</artifactId>
         <version>1.3.2</version>
         <configuration>
            <configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
            <overwrite>true</overwrite>
            <verbose>true</verbose>
         </configuration>
      </plugin>
      <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
         <version>3.1</version>
      </plugin>
      <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <version>2.18.1</version>
         <configuration>
            <skipTests>true</skipTests>
         </configuration>
      </plugin>
      <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-clean-plugin</artifactId>
         <version>2.6.1</version>
      </plugin>
   </plugins>
   <finalName>springboot-test</finalName>
<!-- 指定生成文件存放的目录 -->
   <resources>
      <resource>
         <directory>src/main/java</directory>
         <includes>
            <include>**/*.xml</include>
         </includes>
         <filtering>false</filtering>
      </resource>
      <resource>
         <directory>src/main/resources</directory>
         <filtering>true</filtering>
         <includes>
            <include>**/*.xml</include>
            <include>application.properties</include>
            <include>banner.txt</include>
            <include>META-INF/app.properties</include>
            <!--<include>application-${profileActive}.properties</include>-->
         </includes>
         <excludes>
            <exclude>generatorConfig.xml</exclude>
         </excludes>
      </resource>
   </resources>
</build>

generatorConfig.xml文件配置，该文件在resource目录下。

<?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>
<!-- 修改成自己本地的maven仓库地址，只需要替换红色部分即可(D:maven
epository) -->

    <classPathEntry location="D:maven
epositorycommicrosoftsqlservermssql-jdbc6.1.0.jre8mssql-jdbc-6.1.0.jre8.jar" />
    <context defaultModelType="flat" id="write" targetRuntime="MyBatis3">
        <plugin type="org.mybatis.generator.plugins.ToStringPlugin"/>
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin" />
        <commentGenerator>
            <property name="suppressAllComments" value="false"/>
            <property name="suppressDate" value="false"/>
        </commentGenerator>
<!-- 这里是sqlserver 数据库  -->
        <jdbcConnection driverClass="com.microsoft.sqlserver.jdbc.SQLServerDriver"
                        connectionURL="jdbc:sqlserver://ip:1433;DatabaseName=test"
                        userId="sa"
                        password="123456">
        </jdbcConnection>

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

        <!--生成model  指定生成后类的存放目录-->
        <javaModelGenerator targetPackage="com.example.model.po.base.mbg"
                            targetProject="${generator.path}/src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaModelGenerator>

        <!--生成xml文件 指定生成后的xml 文件存放的目录-->
        <sqlMapGenerator targetPackage="com.example.dal.mappers.base.mbg"
                         targetProject="${generator.path}/src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </sqlMapGenerator>

        <!--生成mappers  指定生成 后mappers 接口存放的目录-->
        <javaClientGenerator targetPackage="com.example.dal.dao.base.mbg"
                             targetProject="${generator.path}/src/main/java"
                             type="XMLMAPPER">
            <property name="enableSubPackages" value="true"/>
            <property name="exampleMethodVisibility" value="public"/>
            <property name="methodNameCalculator" value="default"/>
        </javaClientGenerator>

     <!-- tableName：指的是你数据库中表的名称；domainObjectName：指的是生成实体类对应的名称  -->
        <table tableName="SYS_Menu" domainObjectName="SysMenu" enableSelectByPrimaryKey="true" enableCountByExample="true" enableSelectByExample="true">
            <property name="useActualColumnNames" value="true" />
      <!-- column：指的是sql语句是否设置自动增长 -->
            <generatedKey column="id" identity="true" sqlStatement="SqlServer"/>
        </table>
        
    </context>
</generatorConfiguration>