SpringBoot自动生成代码入门级教程

（1）单击“Create New Project”：

（2）选择Maven并单击Next

(3)填写GroupId和ArtifactId，并点击Next,如下图所示：

(4)填写项目名称和需要存放的路径，并点击Finish，如下图所示：

 （3）安装自动生成代码插件 

然后重启IDEA       

（4）配置数据库 

（5）生成代码 

选中某张表 ，右键 EasyCode->generate code ,全部勾选框即可生成xml,dao,entity,controller

常见问题 ：

1.无法识别bean

application.properties中添加 ：

mybatis.type-aliases-package=com.example.generalCode.dao
mybatis.mapper-locations=classpath:mapper/*.xml

 2.无法识别各种注解 

<?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>2.7.0</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>generalCode</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>generalCode</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</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>5.1.48</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-commons</artifactId>
			<version>2.2.0.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.2.0</version>
        </dependency>
	</dependencies>
 
	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
 
</project>

在报错不能识别 的 注解上ctrl+Enter自动补齐依赖 

3.interface上方不需要使用 mapper注解 ，在启动类上添加@MapperScan("com.example.generalCode.dao")即可 

package com.example.generalCode;
 
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
 
@SpringBootApplication
@MapperScan("com.example.generalCode.dao")
public class GeneralCodeApplication {
 
	public static void main(String[] args) {
		SpringApplication.run(GeneralCodeApplication.class, args);
	}
 
}

最终目录结构如图 ：