微信公众号调用上传永久素材接口

最近在做关于微信公众号的项目，其中需要上传图片代码如下（亲测有效）

前端代码，请将样式忽略

  
上传图片
  

  

  	

   	
  
   



   	

controller层代码

		@RequestMapping("/uploadImageToWechat")
		public ModelAndView uploadImageToWechat(HttpServletRequest request,@RequestParam(value = "picFile", required = false) CommonsMultipartFile picFile){
			String mediaId="";
			if(picFile!=null){
				String result=tbsService.addMaterialEver(picFile, request);
				JSONObject json=JSONObject.fromObject(result);
				mediaId=json.getString("media_id");
			}
			return ModelAndViewUtil.Json_ok(mediaId);
		}

service层代码

/**
	 * 向微信新增永久素材
	 */
	@Override
	public String addMaterialEver(CommonsMultipartFile picFile,HttpServletRequest request) {
		File file = new File(request.getSession().getServletContext().getRealPath(File.separator+"weChatPic"));
		if (!file.exists())
			file.mkdirs(); 
		File file1 = new File(request.getSession().getServletContext().getRealPath(File.separator+"weChatPic"+File.separator+System.currentTimeMillis()+picFile.getFileItem().getName()));
		try {
			picFile.getFileItem().write(file1);
		} catch (Exception e) {
		}
		String result = null;
		try {
			result = addMaterialEverInter(file1,"image");
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		System.out.println(result);
		return result;
	}  

public static String addMaterialEverInter(File file,String type) throws Exception {  
			String accessToken="";
			try {
				accessToken=AccessTokenUtil.getTBS_AccessToken();
			} catch (Exception e) {
				e.printStackTrace();
			};
	        //上传素材    
	        String path="https://api.weixin.qq.com/cgi-bin/material/add_material?access_token="+accessToken+"&type="+type;  
	        String result =null;  
            URL realUrl = new URL(path);

	        URLConnection con= realUrl.openConnection();
	        con.setDoInput(true);  
	        con.setDoOutput(true);  
	        con.setUseCaches(false); // post方式不能使用缓存  
	        // 设置请求头信息  
	        con.setRequestProperty("Connection", "Keep-Alive");  
	        con.setRequestProperty("Charset", "UTF-8");  
	        // 设置边界  
	        String BOUNDARY = "----------" + System.currentTimeMillis();  
	        con.setRequestProperty("Content-Type",  
	                "multipart/form-data; boundary="  
	                + BOUNDARY);  
	          
	        // 请求正文信息  
	        // 第一部分：  
	        StringBuilder sb = new StringBuilder();  
	        sb.append("--"); // 必须多两道线  
	        sb.append(BOUNDARY);  
	        sb.append("\r\n");  
	        sb.append("Content-Disposition: form-data;name=\"media\";filelength=\""+file.length()+"\";filename=\""  
	                + file.getName() + "\"\r\n");  
	        sb.append("Content-Type:application/octet-stream\r\n\r\n");
	        byte[] head = sb.toString().getBytes("utf-8");  
	        // 获得输出流  
	        OutputStream out = new DataOutputStream(con.getOutputStream());  
	        // 输出表头  
	        out.write(head);  
	        // 文件正文部分  
	        // 把文件已流文件的方式 推入到url中  
	        DataInputStream in = new DataInputStream(new FileInputStream(file));  
	        int bytes = 0;  
	        byte[] bufferOut = new byte[1024];  
	        while ((bytes = in.read(bufferOut)) != -1) {  
	            out.write(bufferOut, 0, bytes);  
	        }  
	        in.close();  
	        // 结尾部分  
	        byte[] foot = ("\r\n--" + BOUNDARY + "--\r\n").getBytes("utf-8");// 定义最后数据分隔线  
	        out.write(foot);  
	        out.flush();  
	        out.close();  
	        StringBuffer buffer = new StringBuffer();  
	        BufferedReader reader = null;  
	        try {  
	            // 定义BufferedReader输入流来读取URL的响应  
	            reader = new BufferedReader(new InputStreamReader(con.getInputStream()));  
	            String line = null;  
	            while ((line = reader.readLine()) != null) {  
	                buffer.append(line);  
	            }  
	            if (result == null) {  
	                result = buffer.toString();  
	            }  
	        } catch (IOException e) {  
	            System.out.println("发送POST请求出现异常！" + e);  
	            e.printStackTrace();  
	            throw new IOException("数据读取异常");  
	        } finally {  
	            if (reader != null) {  
	                reader.close();  
	            }  
	        }  
	        return result.toString();  
	}

返回值为media_id和url