图片上传(mybatis)，和修改xml文件目录结构（最后）

发布于2021-06-14 10:09 阅读(643) 评论(0) 点赞(17) 收藏(0)

项目结构

在这里插入图片描述

代码

controller层

package com.generate.demo.controller;

import com.generate.demo.service.UserAService;
import com.generate.demo.utils.JsonResult;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;

/**
 * @Author: 宇
 * @introduction:
 * @catalogue: com.generate.demo.controller
 * @Date: 2021/6/11 9:58
 * @Version: 1.0
 */
@RestController
@RequestMapping("/user")
public class UserAController {
    @Autowired
    UserAService userAService;

    //图片上传
    @RequestMapping("/pictuireR")
    public JsonResult pictuire(@RequestParam("file") MultipartFile file, HttpServletRequest request) {
        return userAService.pictuireR(file, request);
    }

}

service层

package com.generate.demo.service;

import com.generate.demo.utils.JsonResult;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;

/**
 * @Author: 宇
 * @introduction:
 * @catalogue: com.generate.demo.service
 * @Date: 2021/6/11 9:56
 * @Version: 1.0
 */
public interface UserAService {

    //图片上传
    JsonResult pictuireR(@RequestParam("file") MultipartFile file, HttpServletRequest request);
}

impl层（最主要），为了方便，操作使用的工具也放进来了

package com.generate.demo.service.impl;

import com.generate.demo.db.entity.UserA;
import com.generate.demo.db.mapper.UserAMapper;
import com.generate.demo.service.UserAService;
import com.generate.demo.utils.JsonResult;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.FileOutputStream;
import java.util.HashMap;
import java.util.Map;

/**
 * @Author: 宇
 * @introduction:
 * @catalogue: com.generate.demo.service.impl
 * @Date: 2021/6/11 9:57
 * @Version: 1.0
 */
@Service
public class UserAServiceImpl implements UserAService {
    @Autowired
    UserAMapper userAMapper;


    @Override
    public JsonResult<?> pictuireR(MultipartFile file, HttpServletRequest request) {
        if (file.isEmpty()) {
            System.out.println("文件为空！");
            throw new NullPointerException( "图片不能为空");
        }
        String fileName = System.currentTimeMillis() + file.getOriginalFilename();
        String filePath = "E:/picture";
        Map<String, String> jo = new HashMap<>();
        if (file.isEmpty()) {
            jo.put("success", "失败");
            jo.put("fileName", "");
            System.out.println(jo);
        }
        try {
            uploadFile(file.getBytes(), filePath, fileName);
        } catch (Exception e) {
            e.printStackTrace();
        }
        jo.put("success", "成功");
        jo.put("name", fileName);
        UserA userA= new UserA();
        userA.setPic(filePath + "/" + fileName);
        userAMapper.insertSelective(userA);
        jo.put("id", String.valueOf(userA.getId()));
        System.out.println(jo);
        return new JsonResult<>(jo);
    }

    //图片上传
    public static void uploadFile(byte[] file, String filePath, String fileName) throws Exception {
        File targetFile = new File(filePath);
        if (!targetFile.exists()) {
            targetFile.mkdirs();
        }
        FileOutputStream out = new FileOutputStream(filePath + "/" + fileName);
        out.write(file);
        out.flush();
        out.close();
    }
}

entity和mapper和xml是代码生成的，用的是insertSelective方法
在这里插入图片描述

数据库就俩字段，id和pic用上了 在这里插入图片描述

xml文件的位置一般在resources文件夹下面，如果这样存放需要和以前一样配置一下，不过多了一个在pom.xml里面的配置
在这里插入图片描述

<resources>
     <resource>
         <directory>src/main/java</directory>
         <includes>
             <include>com/generate/demo/db/mappers/*.xml</include>
         </includes>
         <filtering>true</filtering>
     </resource>
     <resource>
         <directory>src/main/resources</directory>
     </resource>
 </resources>