搭建后台框架

一、引入依赖

项目的包层级关系如下

依赖引入

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.like</groupId>
    <artifactId>ImageCrudProject</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>18</maven.compiler.source>
        <maven.compiler.target>18</maven.compiler.target>
    </properties>

    <dependencies>
<!--        springboot 启动依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <version>3.1.0</version>
        </dependency>
<!--     springboot web 依赖-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>3.1.0</version>
        </dependency>
<!--lombok依赖-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.24</version>
        </dependency>
<!--        mybatis-plus依赖-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.3.1</version>
        </dependency>

<!--       mysql依赖 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.30</version>
        </dependency>

<!--        连接池-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.11</version>
        </dependency>
    </dependencies>
</project>

二、启动类

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.like.dao")
public class ImageCrudApplication {
     public static void main(String[] args) {
          SpringApplication.run(ImageCrudApplication.class,args);
     }
}

三、配置yml文件

# 配置端口号
server.port=3128

#链接数据库
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/imagesups?&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
spring.datasource.username=root
spring.datasource.password=

#配置mp
mybatis-plus.mapper-locations=classpath*:/mapper/**/*.xml
mybatis-plus.type-aliases-package=com.like.entity

#设置大文件上传
spring.servlet.multipart.max-file-size=500MB
spring.servlet.multipart.max-request-size=1024MB


#图片存储路径
images.path=D:/images/

四、相关配置

解决跨域问题

import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class CorsConfig implements WebMvcConfigurer {

     //ctrl + i
     @Override
     public void addCorsMappings(CorsRegistry registry) {
          registry.addMapping("/**")
                  .allowedOriginPatterns("*")
                  .allowedHeaders(CorsConfiguration.ALL)
                  .allowedMethods(CorsConfiguration.ALL)
                  .allowCredentials(true)
                  .maxAge(3600);//1小时内不需要再校验(option请求)
     }
}

MP分页插件配置

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MyBatisPlusConfig {
    //配置分页插件
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor(){
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
    //数据库类型是MySql，因此参数填写DbType.MYSQL
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        return interceptor;
    }
}

五、common包公共类创建

import lombok.Data;

//Dto是后端返回给前端的数据
@Data
public class CommonDto<T>{
     //业务上的成功失败
     private Boolean success = true;

     //返回给前端的数据
     private String message;

     //返回范型数据
     private T content;
}

import lombok.Data;

import java.util.List;

@Data
public class PageDto<T> {

     private Long total;

     private List<T> list;
}

import com.baomidou.mybatisplus.annotation.TableField;
import lombok.Data;

//Vo用来接受前台的数据
@Data
public class PageVo {
     //第几页
     @TableField(exist = false)
     private int page;
     //每页多少条
     @TableField(exist = false)
     private int size;
}