单表查询，我选择TK Mapper

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首先，我们查看MaBatis通用Mapper4官网github.com/abel533/Map…

啥是TK Mapper啊？

TK Mapper就是⼀个Mybatis插件，是在MyBatis的基础上提供了很多⼯具，让开发变得简单，提⾼开发效率。

我们再来看一下mybatis-generate官网 mybatis.org/generator/

1 Springboot整合mybatis一键生成单表增删改查

1.1 创建用户表t_user

CREATE TABLE t_user ( id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT, username VARCHAR(50) NOT NULL DEFAULT '' COMMENT '用户名', password VARCHAR(50) NOT NULL DEFAULT '' COMMENT '密码', sex TINYINT(4) NOT NULL DEFAULT '0' COMMENT '性别 0=女 1=男 ', deleted TINYINT(4) UNSIGNED NOT NULL DEFAULT '0' COMMENT '删除标志，默认0不删除，1删除', update_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间', create_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间', PRIMARY KEY (id) ) ENGINE=INNODB AUTO_INCREMENT=1001 DEFAULT CHARSET=utf8 COMMENT='用户表';

SELECT * FROM t_user;

1.2 创建Springboot的Module mybatis_generator

image.png

1.3 改pom

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.10.RELEASE</version>
    <relativePath/>
</parent>

<groupId>com.lyhn</groupId>
<artifactId>mybatis_generator</artifactId>
<version>0.0.1-SNAPSHOT</version>

<properties>
    <!--  依赖版本号 -->
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <java.version>1.8</java.version>
    <hutool.version>5.5.8</hutool.version>
    <druid.version>1.1.18</druid.version>
    <mapper.version>4.1.5</mapper.version>
    <pagehelper.version>5.1.4</pagehelper.version>
    <swagger2.version>2.9.2</swagger2.version>
    <swagger-ui.version>2.9.2</swagger-ui.version>
    <mybatis.spring.version>2.1.3</mybatis.spring.version>
</properties>


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

    <!--Mybatis 通用mapper tk单独使用，自己带着版本号-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.4.6</version>
    </dependency>
    <!--mybatis-spring-->
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>${mybatis.spring.version}</version>
    </dependency>
    <!-- Mybatis Generator -->
    <dependency>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-core</artifactId>
        <version>1.4.0</version>
        <scope>compile</scope>
        <optional>true</optional>
    </dependency>
    <!--通用Mapper-->
    <dependency>
        <groupId>tk.mybatis</groupId>
        <artifactId>mapper</artifactId>
        <version>${mapper.version}</version>
    </dependency>
    <!--persistence-->
    <dependency>
        <groupId>javax.persistence</groupId>
        <artifactId>persistence-api</artifactId>
        <version>1.0.2</version>
    </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>
</dependencies>

<build>
    <resources>
        <resource>
            <directory>${basedir}/src/main/java</directory>
            <includes>
                <include>**/*.xml</include>
            </includes>
        </resource>
        <resource>
            <directory>${basedir}/src/main/resources</directory>
        </resource>
    </resources>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <excludes>
                    <exclude>
                        <groupId>org.projectlombok</groupId>
                        <artifactId>lombok</artifactId>
                    </exclude>
                </excludes>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.6</version>
            <configuration>
                <configurationFile>${basedir}/src/main/resources/generatorConfig.xml</configurationFile>
                <overwrite>true</overwrite>
                <verbose>true</verbose>
            </configuration>
            <dependencies>
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>8.0.27</version>
                </dependency>
                <dependency>
                    <groupId>tk.mybatis</groupId>
                    <artifactId>mapper</artifactId>
                    <version>${mapper.version}</version>
                </dependency>
            </dependencies>
        </plugin>
    </plugins>
</build>

1.4 无yml

1.5 mgb配置相关src\main\resources路径下新建

config.properties

image.png generatorConfig.xml

<?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="config.properties"/>

    <context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>

        <plugin type="tk.mybatis.mapper.generator.MapperPlugin">
            <property name="mappers" value="tk.mybatis.mapper.common.Mapper"/>
            <property name="caseSensitive" value="true"/>
        </plugin>

        <jdbcConnection driverClass="${jdbc.driverClass}"
                        connectionURL="${jdbc.url}"
                        userId="${jdbc.user}"
                        password="${jdbc.password}">
        </jdbcConnection>

        <javaModelGenerator targetPackage="${package.name}.entities" targetProject="src/main/java"/>

        <sqlMapGenerator targetPackage="${package.name}.mapper" targetProject="src/main/java"/>

        <javaClientGenerator targetPackage="${package.name}.mapper" targetProject="src/main/java" type="XMLMAPPER"/>

        <table tableName="t_user" domainObjectName="User">
            <generatedKey column="id" sqlStatement="JDBC"/>
        </table>
    </context>
</generatorConfiguration>

1.6 一键生成

双击插件mybatis-generator:gererate，一键生成 生成entity+mapper接口+xml实现SQL

image.png

这里我们TK Mapper环境就搭好了，但是这里默的是将mapper文件放在src/main/java下的，习惯放在src/main/resource下的小伙伴可以自行调整哦

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