目录

一、new project

二、pom.xml

三、配置 resources/application.yml

四、CodeGenerator 代码生成

五、在项目主启动类中，添加@MapperScan注解

六、编写 Controller

七、选择application类， 点击运行

---

一、new project:

二、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>2.7.11</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.edward</groupId>
    <artifactId>springboot-02</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-02</name>
    <description>springboot-02</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.32</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>3.5.3.1</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>3.5.3</version>
        </dependency>
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.32</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

三、配置 resources/application.yml

server:
  port: 9999
spring:
  datasource:
    username: root
    password: 88888888
    url: jdbc:mysql://localhost:3306/wzw?useUnicode=true&characterEncoding=utf8&useSSL=false
    driver-class-name: com.mysql.cj.jdbc.Driver

四、CodeGenerator 代码生成

在 test 目录下新建 CodeGenerator 类，用于 mybatis-plus 自动生成 java 代码

package com.edward;

import com.baomidou.mybatisplus.generator.FastAutoGenerator;
import com.baomidou.mybatisplus.generator.config.OutputFile;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;

import java.util.Collections;

public class CodeGenerator {
    public static void main(String[] args) {
        String username = "root";
        String password = "88888888";
        String url = "jdbc:mysql://localhost:3306/wzw?useUnicode=true&characterEncoding=utf8&useSSL=false";
        String moduleName = "system";
        String mapperLocation = "C:\\Users\\lenovo\\IdeaProjects\\springboot-02\\src\\main\\resources\\mapper\\" + moduleName;

        FastAutoGenerator.create(url, username, password)
                .globalConfig(builder -> {
                    builder.author("edward") // 设置作者
//                            .enableSwagger(); // 开启 swagger 模式
//                            .fileOverride() // 覆盖已生成文件
                            .outputDir("C:\\Users\\lenovo\\IdeaProjects\\springboot-02\\src\\main\\java"); // 指定输出目录
                })
                .packageConfig(builder -> {
                    builder.parent("com.edward") // 设置父包名
                            .moduleName(moduleName) // 设置父包模块名
                            .pathInfo(Collections.singletonMap(OutputFile.xml, mapperLocation)); // 设置mapperXml生成路径
                })
                .strategyConfig(builder -> {
                    builder.addInclude("user, t1") // 设置需要生成的表名
                            .addTablePrefix("t_"); // 设置过滤表前缀
                })
                .templateEngine(new FreemarkerTemplateEngine()) // 使用Freemarker引擎模板，默认的是Velocity引擎模板
                .execute();

    }
}

运行CodeGenerator类后，java 目录和 resource 目录下会自动生成项目所需代码：

 五、在项目主启动类中，添加@MapperScan注解：

@MapperScan("com.edward.*.mapper")

注意：Springboot02Application 与 system 模块必须是同级的！！

六、编写 Controller

package com.edward.system.controller;

import com.edward.system.entity.User;
import com.edward.system.service.impl.UserServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
@RequestMapping("/system/user")
public class UserController {

    @Autowired
    private UserServiceImpl userServiceImpl;


    @GetMapping("/hello")
    public String hello() {
        return "你好，世界";
    }

    @GetMapping("/all")
    public List<User> getAllUser() {
        List<User> userList = userServiceImpl.list();
        return userList;
    }
}

七、选择application类， 点击运行

 控制台上出现下方log时，表示在 localhost:9999 上启动成功：

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