微信公众号之上传图片（本地和网络）

女爷i 2022-05-13 03:40 192阅读 0赞

## 前言 ##

### 1、Controller ###

/**
     *
     * @param strings
     * @throws Exception
     */
    @Value("${wechat_erweimaEmptUrl}")
    private String wechat_erweimaEmptUrl;
    
    
    
    
    @ApiOperation(value = "输入path生成图片",notes = "输入path生成图片",
            consumes = MediaType.MULTIPART_FORM_DATA_VALUE,
            produces = MediaType.APPLICATION_JSON_VALUE,
            response = ResponseBean.class)
    @ApiImplicitParams({
            @ApiImplicitParam(name = "filePath", value = "图片路径", paramType = "query", dataTypeClass = String.class),
            @ApiImplicitParam(name = "type", value = "1 本地文件路径 2、网络图片路径", paramType = "query", dataType = "int"),
            @ApiImplicitParam(name = "weChatBusinessNoId", value = "数据库中存放微信运营者的，主键，服务区号哆趣商城 3： ",paramType = "query", dataType = "long")
    })
    @PostMapping("/image/creteImage")
    @ResponseBody
    public ResponseBean creteImage(String filePath,Integer type,Long weChatBusinessNoId){
        FileOutputStream   outputStream = null;
        File file = null;
        try {
            if(type==2){
                file = new File(wechat_erweimaEmptUrl+UUIDGenerator.generate()+ ".jpg");
                outputStream = new FileOutputStream(file);
                URL u = new URL(filePath);
                BufferedImage imageQR = ImageIO.read(u);
                ImageIO.write(imageQR, "jpg", outputStream);
    
            }else {
                file = new File(filePath);
            }
            return ResponseBean.buildSuccess(WeChatUploadUtil.uploadMediaToWXGetMedia(file, WeChatBusinessNoUtil.findById(weChatBusinessNoId)));
        } catch (AppException e) {
            log.error(e.getMessage(),e);
            return ResponseBean.buildFailure(e.getCode(),e.getMessage());
        } catch (Exception e) {
            log.error(e.getMessage(),e);
            return ResponseBean.buildFailure(e.getMessage());
        }finally {//关闭不必要的连接
            try {
                if (outputStream != null) {
                    outputStream.close();
                }
                //图片生成将服务器文件删除
                if(type==2){
                    file.delete();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    
    }

### 2、上传代码 ###

package com.duodian.youhui.admin.utils.wechat;
    
    import com.duodian.youhui.admin.constants.WechatApiUrlParams;
    import com.duodian.youhui.admin.constants.WechatMenuParams;
    import com.duodian.youhui.admin.utils.wechat.AccessToakeUtil;
    import com.duodian.youhui.entity.db.wechat.WeChatBusinessNo;
    import lombok.extern.slf4j.Slf4j;
    import net.sf.json.JSONObject;
    
    import java.io.*;
    import java.net.HttpURLConnection;
    import java.net.URL;
    
    /**
     * @Desc:
     * @Author HealerJean
     * @Date 2018/5/28  下午3:16.
     */
    @Slf4j
    public class WeChatUploadUtil {
    
    
        public static String uploadMediaToWXGetMedia(File file,WeChatBusinessNo weChatBusinessNo) throws IOException {
            if (!file.exists()) {
                log.error("文件不存在！");
                return null;
            }
    
            //此处改为自己想要的结构体，替换即可
            String access_token= AccessToakeUtil.getAccessToaken(weChatBusinessNo);
    
            String type = "image";
            String url = WechatApiUrlParams.UPLOAD__MEDIA_URL+access_token+"&type="+type+"";
            URL urlObj = new URL(url);
            HttpURLConnection conn = (HttpURLConnection) urlObj.openConnection();
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setUseCaches(false);
    
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("Charset", "UTF-8");
    
            // 设置边界
            String BOUNDARY = "----------" + System.currentTimeMillis();
            conn.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=\"file\";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(conn.getOutputStream());
            out.write(head);
    
            // 文件正文部分
            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();
    
            /**
             * 读取服务器响应，必须读取,否则提交不成功
             */
            try {
                // 定义BufferedReader输入流来读取URL的响应
                StringBuffer buffer = new StringBuffer();
                BufferedReader reader = new BufferedReader(new InputStreamReader(
                        conn.getInputStream()));
                String line = null;
                while ((line = reader.readLine()) != null) {
                    buffer.append(line);
                }
    
                reader.close();
                conn.disconnect();
                String mediaId = JSONObject.fromObject(buffer.toString()).getString("media_id");
                log.info("mediaId："+mediaId);
                return  mediaId;
            } catch (Exception e) {
                log.error("发送POST请求出现异常！" + e);
                e.printStackTrace();
            }
            return null;
        }
    
    
     
     
    /**
     * 从微信服务器下载多媒体文件
     *
     * @author qincd
     * @date Nov 6, 2014 4:32:12 PM
     */
    public static String downloadMediaFromWx(String fileSavePath,WeChatBusinessNo weChatBusinessNo,String mediaId) throws IOException {
    
        String download_media_url =WechatApiUrlParams.DOWNLOAD_MEDIA_URL;
    
        //此处改为自己想要的结构体，替换即可
        String access_token= AccessToakeUtil.getAccessToaken(weChatBusinessNo);
    
    
        String requestUrl = download_media_url.replace("ACCESS_TOKEN", access_token).replace("MEDIA_ID", mediaId);
        URL url = new URL(requestUrl);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        conn.setDoInput(true);
        conn.setDoOutput(true);
        InputStream in = conn.getInputStream();
    
        File dir = new File(fileSavePath);
        if (!dir.exists()) {
            dir.mkdirs();
        }
        if (!fileSavePath.endsWith("/")) {
            fileSavePath += "/";
        }
    
        String ContentDisposition = conn.getHeaderField("Content-disposition");
        String weixinServerFileName = ContentDisposition.substring(ContentDisposition.indexOf("filename")+10, ContentDisposition.length() -1);
        fileSavePath += weixinServerFileName;
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(fileSavePath));
        byte[] data = new byte[1024];
        int len = -1;
    
        while ((len = in.read(data)) != -1) {
            bos.write(data,0,len);
        }
    
        bos.close();
        in.close();
        conn.disconnect();
    
        return fileSavePath;
    }
    
    
     
    
    }

![ContactAuthor][]

[ContactAuthor]: /images/20220513/4916129838954c298fc1f9473f335527.png