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本教程将介绍如何使用 mybatis-plus 工具自动给我们生成 Controller、Service、Entity、Mapper、Mapper.xml 层代码
要求:
① 生成的Controller类,需要继承 BaseController
② 生成的Entity 类,需要继承 BaseEntity
③ 生成的 Service,默认名称下是以 I 开头的接口, 在生成Service层代码中需要把这个 I 去掉
① 在数据库中创建好 数据库 与 要生成代码对应的表
这里拿 user 表举例
DROP TABLE IF EXISTS user;
CREATE TABLE user
(
id BIGINT(20) NOT NULL COMMENT '主键ID',
name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
age INT(11) NULL DEFAULT NULL COMMENT '年龄',
email VARCHAR(50) NULL DEFAULT NULL COMMENT '邮箱',
PRIMARY KEY (id)
);
DELETE FROM user;
INSERT INTO user (id, name, age, email) VALUES
(1, 'Jone', 18, 'test1@baomidou.com'),
(2, 'Jack', 20, 'test2@baomidou.com'),
(3, 'Tom', 28, 'test3@baomidou.com'),
(4, 'Sandy', 21, 'test4@baomidou.com'),
(5, 'Billie', 24, 'test5@baomidou.com');
② 创建 一个SpringBoot 项目,其中 pom.xml 内容如下:
<?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>2.1.11.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.lcy</groupId>
<artifactId>mybatis-plus-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>mybatis-plus-demo</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.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-generator</artifactId>
<version>3.3.0</version>
</dependency>
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-engine-core</artifactId>
<version>2.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
③、BaseController 和 BaseEntity 类
package com.lcy.demo.sys.controller;
public class BaseController {
}
package com.lcy.demo.sys.entity;
public class BaseEntity {
}
④、 创建代码生成类
package com.lcy.demo.generator;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
import com.baomidou.mybatisplus.generator.config.GlobalConfig;
import com.baomidou.mybatisplus.generator.config.PackageConfig;
import com.baomidou.mybatisplus.generator.config.StrategyConfig;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
public class MysqlGenerator {
public static void main(String[] args) {
AutoGenerator mpg = new AutoGenerator();
//1、全局配置
GlobalConfig gc = new GlobalConfig();
String projectPath = System.getProperty("user.dir");
gc.setOutputDir(projectPath + "/src/main/java"); //生成路径(一般都是生成在此项目的src/main/java下面)
gc.setAuthor("liangcy"); //设置作者
gc.setOpen(false);
gc.setFileOverride(true); //第二次生成会把第一次生成的覆盖掉
gc.setServiceName("%sService"); //生成的service接口名字首字母是否为I,这样设置就没有
gc.setBaseResultMap(true); //生成resultMap
mpg.setGlobalConfig(gc);
//2、数据源配置
DataSourceConfig dsc = new DataSourceConfig();
dsc.setUrl("jdbc:mysql://localhost:3306/mybatis-plus-demo?useUnicode=true&serverTimezone=GMT&useSSL=false&characterEncoding=utf8");
dsc.setDriverName("com.mysql.jdbc.Driver");
dsc.setUsername("root");
dsc.setPassword("123456");
mpg.setDataSource(dsc);
// 3、包配置
PackageConfig pc = new PackageConfig();
pc.setModuleName("sys");
pc.setParent("com.lcy.demo");
mpg.setPackageInfo(pc);
// 4、策略配置
StrategyConfig strategy = new StrategyConfig();
strategy.setNaming(NamingStrategy.underline_to_camel);
strategy.setColumnNaming(NamingStrategy.underline_to_camel);
strategy.setSuperControllerClass("com.lcy.demo.sys.controller.BaseController");
strategy.setSuperEntityClass("com.lcy.demo.sys.entity.BaseEntity");
// strategy.setTablePrefix("t_"); // 表名前缀
strategy.setEntityLombokModel(true); //使用lombok
strategy.setInclude("user"); // 逆向工程使用的表 如果要生成多个,这里可以传入String[]
mpg.setStrategy(strategy);
//5、执行
mpg.execute();
}
}
补充说明:
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