springboot集成mybatis自动生成代码

需求： springboot项目，通过mybatis自动根据数据库生成对应的实体/mapper

开发工具： idea

方法：

一、创建一个springboot对象

 

 

 

 

 二、配置pom 

 

  我的pom如下：

<?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>2.4.3</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>mybatisgen</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>mybatisgen</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-data-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.4</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.6</version>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.9</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>1.3.2</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-resources-plugin</artifactId>
                <version>2.4.3</version>
                <configuration>
                </configuration>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>${basedir}/src/main/resources</directory>
                <excludes>
                    <exclude>lib/*.jar</exclude>
                </excludes>
            </resource>
        </resources>
    </build>

</project>

三、下载依赖的资源

四、配置application.properties文件

#=================mybatis相关配置===================#
mybatis.jdbc.jar=C:/Users/Administrator/AppData/Roaming/JetBrains/IntelliJIdea2020.1/jdbc-drivers/MySQL ConnectorJ/8.0.21/mysql-connector-java-8.0.21.jar
mybatis.javaModelGenerator.targetPackage=com.example.mybatisgen.entity
mybatis.generator.targetProject=src/main/java
mybatis.sqlMapGenerator.targetPackage=com.example.mybatisgen.mapper
mybatis.javaClientGenerator.targetPackage=com.example.mybatisgen.mapper
#mybatis扫描接口对应的xml文件
mybatis.type-aliases-package=com.example.mybatisgen.entity
mybatis.mapper-locations=classpath*:mapper/*.xml

#=================mysql相关配置===================#
spring.datasource.name=virtual_control_db
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#druid相关配置
# 监控统计拦截的filters
spring.datasource.druid.filters=stat
spring.datasource.druid.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.druid.url=jdbc:mysql://127.0.0.1:3306/test?serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true
spring.datasource.druid.username=root
spring.datasource.druid.password=root

根据自己的项目情况和数据库情况进行更改

五、配置自动生成的xml

在resources下创建文件generatorConfig.xml

 文件内容直接粘贴我的就行，因为配置基本都是变量，从application.properties中读取的，基本上不需要更改。不过需要根据自己数据库情况改动下<!--生成全部的表-->注解处的配置。

<?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">
<!-- 配置 tableName,使用 Run As Maven build 生成 dao 层 -->
<generatorConfiguration>
    <!-- 配置文件路径 -->
    <properties resource="application.properties"/>
    <!--数据库驱动包路径 -->
    <classPathEntry location="${mybatis.jdbc.jar}"/>

    <!-- flat表示为每一张表只生成一个实体类。这个实体类包含表中的所有字段-->
    <context id="virtual-control-sql" defaultModelType="flat">
        <!-- 生成的Java文件的编码 -->
        <property name="javaFileEncoding" value="UTF-8"/>
        <!-- 格式化java代码 -->
        <property name="javaFormatter"
                  value="org.mybatis.generator.api.dom.DefaultJavaFormatter"/>
        <!-- 格式化XML代码 -->
        <property name="xmlFormatter"
                  value="org.mybatis.generator.api.dom.DefaultXmlFormatter"/>
        <!-- 抑制警告 -->
        <property name="suppressTypeWarnings" value="true"/>
        <!-- generate entity时，生成serialVersionUID -->
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>

        <!--关闭注释 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
            <property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 -->
        </commentGenerator>

        <!--数据库连接信息 -->
        <jdbcConnection driverClass="${spring.datasource.druid.driver-class-name}"
                        connectionURL="${spring.datasource.druid.url}"
                        userId="${spring.datasource.druid.username}"
                        password="${spring.datasource.druid.password}">
        </jdbcConnection>


        <!--生成的model 包路径 -->
        <javaModelGenerator targetPackage="${mybatis.javaModelGenerator.targetPackage}"
                            targetProject="${mybatis.generator.targetProject}">
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>

        <!--生成xml mapper文件 路径 -->
        <sqlMapGenerator targetPackage="${mybatis.sqlMapGenerator.targetPackage}"
                         targetProject="${mybatis.generator.targetProject}">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>

        <!-- 生成的Dao接口 的包路径 -->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="${mybatis.javaClientGenerator.targetPackage}"
                             targetProject="${mybatis.generator.targetProject}">
        </javaClientGenerator>

        <!--生成全部的表-->
        <table tableName="user">
            <generatedKey column="id" sqlStatement="Mysql"/>
        </table>
    </context>
</generatorConfiguration>

六、执行插件目标，准备生成代码

  

 执行成功控制台会显示如下信息：

 看看项目中是否已经生成新的代码：

 试试看吧~