微信小程序wx.uploadFile 上传实例（附带java后端代码）

本文以上传图片为例

小程序代码：

startUpload: function(){
    wx.chooseImage({
      success: function (res) {
        var tempFilePaths = res.tempFilePaths
        console.log(tempFilePaths)
        wx.uploadFile({
          url: 'http://localhost:8080/upload/fileUpload' , //仅为示例，非真实的接口地址
          filePath: tempFilePaths[0],
          name: "file",
          header: {
          "Content-Type": "multipart/form-data"
          },
          formData: {
            "user": "test",
          },
          success: function (res) {
            var data = res.data
            console.log(data)
            //do something
          }
        })
      }

java后端代码：

package com.contoller;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.UUID;

import javax.servlet.http.HttpServletRequest;

import org.apachemons.io.FileUtils;
import org.apachemons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import com.tool.FileUtil;

@RestController
@RequestMapping("/upload")
public class UploadFileContoller {
	
	private static final Logger LOG = LoggerFactory
			.getLogger(UploadFileContoller.class);
	
	@PostMapping("/fileUpload")
	public String uploadMusicFile(HttpServletRequest request,@RequestParam("file")MultipartFile[] files){
		LOG.info("进入上传...");
		String uploadPath="E:/pic/";//存放到本地路径（示例）
		if(files!=null && files.length>=1) {
	            BufferedOutputStream bw = null;
	            try {
	                String fileName = files[0].getOriginalFilename();
	                //判断是否有文件
	                if(StringUtils.isNoneBlank(fileName)) {
                        //输出到本地路径
File outFile = new File(uploadPath + UUID.randomUUID().toString()+ FileUtil.getFileType(fileName));                    LOG.info("path=="+uploadPath + UUID.randomUUID().toString()+ FileUtil.getFileType(fileName));                                        FileUtils.copyInputStreamToFile(files[0].getInputStream(), outFile);                }            } catch (Exception e) {                e.printStackTrace();            } finally {                try {                    if(bw!=null) {bw.close();}                } catch (IOException e) {                    e.printStackTrace();                }            }        }return "success";}}

public static String getFileType(String filename){
        if(filename.endsWith(".jpg") || filename.endsWith(".jepg")){
        	return ".jpg";
        }else if(filename.endsWith(".png") || filename.endsWith(".PNG")){
        	return ".png";
        } else{
            return "application/octet-stream";
        }
}