在IDEA中如何一键生成代码，提高开发效率

文章目录

一、准备工作

1. 插件安装

在IDEA中安装（EasyCode）插件、（Lombok）插件。

2. 创建一个springboot项目

创建完成后的目录结构：

在这里插入图片描述

3. 准备数据库表

表结构：

CREATE TABLE `user` (
  `id` int(11) NOT NULL,
  `username` varchar(255) DEFAULT NULL,
  `gender` varchar(11) DEFAULT NULL,
  `age` int(11) DEFAULT NULL,
  `address` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8; 
idea关联mysql时报错Server returns invalid timezone. Go to 'Advanced' tab and set 'serverTimezon'

<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.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>

    <!--  springboot与mybatis的整合包 -->
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.1.1</version>
    </dependency>

    <!--  mysql驱动包 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.46</version>
    </dependency>

    <!--  引入druid -->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.1.8</version>
    </dependency>

    <!--  引入lombok用来简化实体类  -->
    <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>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

3. 编写数据源的相关配置

application.properties

server.port=8082
# 数据库配置
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/springboot?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

mybatis.mapper-locations=classpath:/mapper/*Dao.xml

4. 在dao接口添加@Mapper注解

@Mapper
public interface UserDao {
......
} 
三、测试
controller层
（不再展示其它层代码，展示controller是为了方便查看请求路径）

package com.parker.controller;

import com.parker.entity.User;
import com.parker.service.UserService;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;

/**
 * (User)表控制层
 *
 * @author 扬帆向海
 * @since 2020-05-15 00:56:29
 */
@RestController
@RequestMapping("user")
public class UserController {
    /**
     * 服务对象
     */
    @Resource
    private UserService userService;

    /**
     * 通过主键查询单条数据
     *
     * @param id 主键
     * @return 单条数据
     */
    @GetMapping("selectOne")
    public User selectOne(Integer id) {
        return this.userService.queryById(id);
    }

}