新增所需要的依賴

<dependencies>
 <!--包含了HikariCP執行緒池和spring-jdbc-->
 <dependency>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-jdbc</artifactId>
 </dependency>
 <!--包含了mybatis和pagehelper分頁外掛-->
  <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper-spring-boot-starter</artifactId>
  </dependency>
  <!--連線mysql資料庫-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
</dependencies>
<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <!-- mybatis generator 自動生成程式碼外掛 -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.7</version>
				<dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.47</version>
				</dependency>
                </dependencies>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
                    <verbose>true</verbose>
                </configuration>
            </plugin>
        </plugins>
</build>
 

在resources/generator目錄下建立generatorConfig.xml配置檔案

<?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="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>
        <plugin type="org.mybatis.generator.plugins.RenameExampleClassPlugin">
            <property name="searchString" value="Example$"/>
            <property name="replaceString" value="Criteria"/>
        </plugin>
        <commentGenerator>
            <!-- 這個元素用來去除指定生成的註釋中是否包含生成的日期 false:表示保護 -->
            <!-- 如果生成日期，會造成即使修改一個欄位，整個實體類所有屬性都會發生變化，不利於版本控制，所以設定為true -->
            <property name="suppressDate" value="true"/>
            <!-- 是否去除自動生成的註釋 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
            <!-- 生成的Java檔案的編碼 -->
            <property name="javaFileEncoding" value="UTF-8"/>
        </commentGenerator>
        <!--資料庫連結URL，使用者名稱、密碼 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/test?autoReconnect=true&amp;useUnicode=true&amp;characterEncoding=UTF-8&amp;useSSL=false"
                        userId="root" password="jc164214878">
        </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>


        <!-- 生成模型的包名和位置 -->
        <javaModelGenerator targetPackage="com.ocean.springcloud.oceanrabbitmqfinal.entity"
                            targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!-- 生成對映檔案的包名和位置 -->
        <sqlMapGenerator targetPackage="mapper"
                         targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!-- 生成Mapper 介面的包名和位置-->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.ocean.springcloud.oceanrabbitmqfinal.mapper"
                             targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>

        <!-- 要生成哪些表-->
        <table schema="" tableName="t_order"/>
    </context>
</generatorConfiguration>
 

點選 Maven-plugins中的mybatis-generator反向生成即可