根据数据表自动生成实体类、Mapper、Service、ServiceImpl、Controller
一、依赖
1、pom.xml 导入 MyBatis Plus Generator
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-generator</artifactId>
<version>3.3.1.tmp</version>
</dependency>
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.7</version>
</dependency>
Velocity(默认)、Freemarker、Beetl
数据库中的表
二、启动类
package com.md.mybatisplus;
import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException;
import com.baomidou.mybatisplus.core.toolkit.StringUtils;
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;
import java.util.Scanner;
/**
* @author md
* @Desc
* @date 2020/10/26 22:13
*/
public class main {
/**
* <p>
* 读取控制台内容
* </p>
*/
public static String scanner(String tip) {
Scanner scanner = new Scanner(System.in);
StringBuilder help = new StringBuilder();
help.append("请输入" + tip + ":");
System.out.println(help.toString());
if (scanner.hasNext()) {
String ipt = scanner.next();
if (StringUtils.isNotBlank(ipt)) {
return ipt;
}
}
throw new MybatisPlusException("请输入正确的" + tip + "!");
}
public static void main(String[] args) {
//创建generator对象
AutoGenerator autoGenerator = new AutoGenerator();
//数据源
DataSourceConfig dataSourceConfig = new DataSourceConfig();
dataSourceConfig.setDbType(DbType.MysqL);
dataSourceConfig.setUrl("jdbc:MysqL://localhost:3306/springboot?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=UTF-8");
dataSourceConfig.setUsername("root");
dataSourceConfig.setPassword("123456");
dataSourceConfig.setDriverName("com.MysqL.cj.jdbc.Driver");
autoGenerator.setDataSource(dataSourceConfig);
//全局配置
GlobalConfig globalConfig = new GlobalConfig();
// 工程的绝对路径+下面的目录,根据自己的路径修改
globalConfig.setOutputDir(System.getProperty("user.dir")+"/02-auto/src/main/java");
globalConfig.setOpen(false);
globalConfig.setAuthor("md");
globalConfig.setServiceName("%sService");
autoGenerator.setGlobalConfig(globalConfig);
//包信息
PackageConfig packageConfig = new PackageConfig();
packageConfig.setParent("com.md.mybatisplus");
// 生成的module
packageConfig.setModuleName(scanner("模块名:"));
packageConfig.setController("controller");
packageConfig.setService("service");
packageConfig.setServiceImpl("service.impl");
packageConfig.setMapper("mapper");
packageConfig.setEntity("entity");
autoGenerator.setPackageInfo(packageConfig);
//配置策略
StrategyConfig strategyConfig = new StrategyConfig();
// 自动添加Lombok注解
strategyConfig.setEntityLombokModel(true);
// 数据库中的下划线改驼峰
strategyConfig.setColumnNaming(NamingStrategy.underline_to_camel);
strategyConfig.setNaming(NamingStrategy.underline_to_camel);
// 可以指定表名
strategyConfig.setInclude(scanner("表名,多个英文逗号分割").split(","));
autoGenerator.setStrategy(strategyConfig);
autoGenerator.execute();
}
}
三、测试
1. Application
加入mapper
package com.md.mybatisplus;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
@MapperScan(value = "com.md.mybatisplus.user.mapper")
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class,args);
}
}
2. 主配置文件
spring.datasource.driver-class-name=com.MysqL.cj.jdbc.Driver
spring.datasource.url=jdbc:MysqL://localhost:3306/springboot?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=123456
# 专门用于打印日志
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
#thymeleaf 模版前缀,默认可以不写
spring.thymeleaf.prefix=classpath:/templates/
#thymeleaf 模版后缀,默认可以不写
spring.thymeleaf.suffix=.html
3. pom.xml
<?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>2.3.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.md.mybatisplus</groupId>
<artifactId>02-auto</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>02-auto</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-thymeleaf</artifactId>
</dependency>
<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>MysqL</groupId>
<artifactId>MysqL-connector-java</artifactId>
<scope>5.1.9</scope>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.3.1.tmp</version>
</dependency>
<!--自动生成-->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-generator</artifactId>
<version>3.3.1.tmp</version>
</dependency>
<!--自动生成的模板-->
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.7</version>
</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>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
4. UserController
package com.md.mybatisplus.user.controller;
import com.md.mybatisplus.user.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.stereotype.Controller;
import org.springframework.web.servlet.ModelAndView;
/**
* <p>
* 前端控制器
* </p>
*
* @author md
* @since 2020-10-26
*/
@Controller
@RequestMapping("/user/user")
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/index")
public ModelAndView index(){
ModelAndView mv = new ModelAndView();
mv.setViewName("index");
// 自动生成的方法,直接使用,查询数据库中的全部数据
mv.addObject("users",userService.list());
return mv;
}
}
5. index
templates下的index.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<Meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<table>
<tr th:each="user:${users}">
<td th:text="${user.id}"></td>
<td th:text="${user.name}"></td>
<td th:text="${user.age}"></td>
</tr>
</table>
</body>
</html>