SpringBoot文件上传

• 首先是测试用的页面：

    
    
    
    
    




    图片
    

• 接着是Controller：

package com.sicnu.zhijiao.controller;

import com.sicnu.zhijiao.entity.Msg;
import com.sicnu.zhijiao.util.FileUtil;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;

@Controller
public class FileController {
    //跳转到上传文件的页面
    @RequestMapping(value = "/gouploadimg", method = RequestMethod.GET)
    public String goUploadImg() {
        //跳转到 templates 目录下的 uploadimg.html
        return "uploadimg";
    }

    //处理文件上传
    @RequestMapping(value = "/upload", method = RequestMethod.POST)
    @ResponseBody
    public String uploadImg(@RequestParam("file") MultipartFile file,
                         HttpServletRequest request) {
        String contentType = file.getContentType();
        String fileName = file.getOriginalFilename();  //获取上传文件原名
        System.out.println("fileName-->" + fileName);
        System.out.println("getContentType-->" + contentType);
        String filePath = request.getSession().getServletContext().getRealPath("imgupload/");
        try {
            FileUtil.uploadFile(file.getBytes(), filePath, fileName);
        } catch (Exception e) {
            System.out.println("文件上传失败");
        }
        //返回json
        return  "上传成功";
    }


}

• FileUtil工具类：

package com.sicnu.zhijiao.util;

import java.io.File;
import java.io.FileOutputStream;

public class FileUtil {

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

}