vue+springboot文件上传

//vue element-ui组件
<el-upload style="position: relative;top: -40px;left: 240px;"
                      :show-file-list="false"
                      :on-success="onSuccess"
                      :on-error="onError"
                      :before-upload="beforeUpload"
                      :on-remove="handleRemove"
                      action="/api/upLoadFile"
                      accept=".json, .txt, .csv, .xls, .xlsx"
                    >
                      <el-button plain type="primary">导入</el-button>
                    </el-upload>
//js方法
  handleRemove(file, fileList) {
    },

        /**
     * 上传之前回调函数
     */
    beforeUpload(file) {
      console.log(file.name);
      this.uploaDialog = true;
    },
      /**
     * 上传失败回调函数
     */
    onError(err, file, fileList) {
      this.enabledUploadBtn = false;
      this.$message({
        message: "上传失败",
        type: "error"
      });
    },
    /**
     * 上传成功回调函数
     */
    onSuccess(response, file, fileList) {
      this.enabledUploadBtn = false;
      // console.log(response)
      this.$message({
        message: response.msg,
          type: "info"
      });
        file = [];
        fileList = [];
    },


//后台

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

@Controller
public class UploadFile {

   private static Logger log = LoggerFactory.getLogger(UploadFile.class);


  @RequestMapping(value = "/upLoadFile", method = RequestMethod.POST, produces = "application/json;charset=utf-8")
  @ResponseBody
  public String importFile(@RequestParam("file") MultipartFile file,
    HttpServletRequest request){
      log.info("importFile()");
      Map<String, String> reMap = new HashMap<>();
      if (file.isEmpty()) {
        return "文件为空";
      }
      // 获取文件名
      String fileName = file.getOriginalFilename();
      log.info("上传的文件名为:" + fileName);
      // 获取文件的后缀名
      String suffixName = fileName.substring(fileName.lastIndexOf("."));
      log.info("上传的后缀名为:" + suffixName);
      // 文件上传路径 应该改为服务器路径
      String filePath = "f:/objdocument/";
      File dest = new File(filePath + fileName);
      // 检测是否存在目录
      if (!dest.getParentFile().exists()) {
        dest.getParentFile().mkdirs();
      }
      try {
        file.transferTo(dest);
        reMap.put("msg", "上传成功");
      } catch (IllegalStateException e) {
        log.info(e.toString());
        reMap.put("msg", "上传失败");
      } catch (IOException e) {
        log.info(e.toString());
        reMap.put("msg", "上传失败");
      }
      String str = JsonUtil.map2Json(reMap);
      return str;
  }
}

 application.properties相关配置

spring.http.multipart.enabled=true #默认支持文件上传.
spring.http.multipart.file-size-threshold=0 #支持文件写入磁盘.
spring.http.multipart.location= # 上传文件的临时目录 
spring.http.multipart.max-file-size=1Mb # 最大支持文件大小 
spring.http.multipart.max-request-size=10Mb # 最大支持请求大小
原文地址:https://www.cnblogs.com/xuchao0506/p/12681432.html