2022如何使用微信小程序做出图片上传

 
     
      
       
       营业执照 
       {{imageList.length}}/{{count[countIndex]}} 
       
       
        
         
          
           
          
         
        
        
         
        
       
      
   

chooseImage: function () { 
  var that = this; 
  console.log('aaaaaaaaaaaaaaaaaaaa') 
  
  wx.chooseImage({ 
   count: this.data.count[this.data.countIndex], 
   success: function (res) { 
    console.log('ssssssssssssssssssssssssss') 
    //缓存下 
    wx.showToast({ 
     title: '正在上传...', 
     icon: 'loading', 
     mask: true, 
     duration: 2000, 
     success: function (ress) { 
      console.log('成功加载动画'); 
     } 
    }) 
 
    console.log(res) 
    that.setData({ 
     imageList: res.tempFilePaths 
    }) 
    //获取第一张图片地址 
    var filep = res.tempFilePaths[0] 
    //向服务器端上传图片 
    // getApp().data.servsers,这是在app.js文件里定义的后端服务器地址 
    wx.uploadFile({ 
     url: getApp().data.servsers + '/weixin/wx_upload.do', 
     filePath: filep, 
     name: 'file', 
     formData: { 
      'user': 'test' 
     }, 
     success: function (res) { 
      console.log(res) 
      console.log(res.data) 
      var sss= JSON.parse(res.data) 
      var dizhi = sss.dizhi; 
      //输出图片地址 
      console.log(dizhi); 
      that.setData({ 
       "dizhi": dizhi 
      }) 
 
      //do something  
     }, fail: function (err) { 
      console.log(err) 
     }  
      }); 
   } 
  }) 
 }, 
 previewImage: function (e) { 
  var current = e.target.dataset.src 
 
  wx.previewImage({ 
 
   current: current, 
   urls: this.data.imageList 
  }) 
 }

//获取当前日期时间的string类型用于文件名防重复 
  public String dates(){ 
     Date currentTime = new Date(); 
     SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss"); 
     String dateString = formatter.format(currentTime); 
     return dateString; 
  } 
  @RequestMapping("wx_upload.do") 
  public void uploadPicture(HttpServletRequest request, HttpServletResponse response,PrintWriter writer) throws Exception { 
    System.out.println("进入get方法！"); 
  //获取从前台传过来得图片 
    MultipartHttpServletRequest req =(MultipartHttpServletRequest)request; 
    MultipartFile multipartFile = req.getFile("file"); 
  //获取图片的文件类型 
    String houzhu=multipartFile.getContentType(); 
    int one = houzhu.lastIndexOf("/"); 
    System.out.println(houzhu.substring((one+1),houzhu.length())); 
    System.out.println(multipartFile.getName()); 
  //根据获取到的文件类型截取出图片后缀 
    String type=houzhu.substring((one+1),houzhu.length()); 
    System.out.println(multipartFile.getContentType()); 
 
    String filename; 
  // request.getRealPath获取我们项目的根地址在加上我们要保存的地址 
    String realPath = request.getRealPath("/upload/wximg/"); 
    try { 
      File dir = new File(realPath); 
      if (!dir.exists()) { 
        dir.mkdir(); 
      } 
      //获取到当前的日期时间用户生成文件名防止文件名重复 
      String filedata=this.dates(); 
    //生成一个随机数来防止文件名重复 
      int x=(int)(Math.random()*1000); 
      filename="zhongshang"+x+filedata; 
      System.out.println(x); 
    将文件的地址和生成的文件名拼在一起 
      File file = new File(realPath,filename+"."+type); 
      multipartFile.transferTo(file); 
    //将图片在项目中的地址和isok状态储存为json格式返回给前台，由于公司项目中没有fastjson只能用这个 
      JSONObject jsonObject=new JSONObject(); 
      jsonObject.put("isok",1); 
      jsonObject.put("dizhi","/upload/wximg/"+filename+"."+type); 
 
      writer.write(jsonObject.toString()); 
    } catch (IOException e) { 
      e.printStackTrace(); 
    } catch (IllegalStateException e) { 
      e.printStackTrace(); 
    } 
}