折腾了一天，终于把这个图片接口（https://api.mch.weixin.qq.com/v3/merchant/media/upload）调通了。看到社区里面有不少小伙伴遇到了一样的问题，这里简单分享一下我的测试代码。因为我是用java开发的，所以下面内容的代码示例都是java的。
水平有限，如有错漏之处，请多多指教。
public class uploadFileTest { public static void main(String[] args) { // TODO Auto-generated method stub try { // 换行符 String LINE_END = "\r\n"; String PREFIX = "--"; // 定义数据分隔线 String BOUNDARY = ""; //商户号 String mchid = ""; //证书序列号 String serial_no = ""; //商户私钥（拷贝apiclient_key.pem文件里-----BEGIN PRIVATE KEY-----和-----END PRIVATE KEY-----之间的内容） String rsaPrivateKeyFile = ""; //微信支付平台公钥文件 String rsaPublicKey = ""; //时间戳 String timestamp = Long.toString(System.currentTimeMillis()/1000); //随机数 String nonce_str = ""; //图片文件 String filePath = "";//文件路径 File file = new File(filePath); String filename = file.getName();//文件名 String fileSha256 = DigestUtils.sha256Hex(//文件sha256值 //拼签名串 StringBuffer sb = new StringBuffer(); sb.append("POST").append("\n"); sb.append("/v3/merchant/media/upload").append("\n"); sb.append(timestamp).append("\n"); sb.append(nonce_str).append("\n"); sb.append("{\"filename\":\""+filename+"\",\"sha256\":\""+fileSha256+"\"}").append("\n"); System.out.println("签名原串:"+sb.toString()); //计算签名 String sign = new String(Base64.encodeBase64(signRSA(sb.toString(),rsaPrivateKey))); System.out.println("签名sign值:"+sign); //拼装http头的Authorization内容 String authorization ="WECHATPAY2-SHA256-RSA2048 mchid=\""+mchid+"\",nonce_str=\""+nonce_str+"\",signature=\""+sign+"\",timestamp=\""+timestamp+"\",serial_no=\""+serial_no+"\""; System.out.println("authorization值:"+authorization); //接口URL URL url = new URL("https://api.mch.weixin.qq.com/v3/merchant/media/upload"); HttpURLConnection conn = (HttpURLConnection) url.openConnection(); // 设置为POST conn.setRequestMethod("POST"); // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); conn.setUseCaches(false); // 设置请求头参数 conn.setRequestProperty("Charsert", "UTF-8"); conn.setRequestProperty("Accept","application/json"); conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY); conn.setRequestProperty("Authorization", authorization); DataOutputStream dos = new DataOutputStream(conn.getOutputStream()); //拼装请求内容第一部分 StringBuilder strSb = new StringBuilder(); strSb.append(PREFIX).append(BOUNDARY).append(LINE_END) .append("Content-Disposition: form-data; name=\"meta\";" + LINE_END) .append("Content-Type: application/json; " + LINE_END) .append(LINE_END)// 空行 .append("{\"filename\":\""+filename+"\",\"sha256\":\""+fileSha256+"\"}") .append(LINE_END);dos.write(strSb.toString().getBytes()); dos.flush(); //拼装请求内容第二部分 StringBuilder fileSbStart = new StringBuilder(); fileSbStart.append(PREFIX).append(BOUNDARY).append(LINE_END) .append("Content-Disposition: form-data; name=\"file\"; filename=\""+ filename+ "\";" + LINE_END) .append("Content-Type: image/jpeg" + LINE_END) .append(LINE_END);// 空行dos.write(fileSbStart.toString().getBytes()); dos.flush(); //文件二进制内容 InputStream is = new FileInputStream(file); byte[] buffer = new byte[1024]; int len = 0; while ((len = is.read(buffer)) != -1){ dos.write(buffer,0,len); } is.close(); //拼装请求内容结尾 StringBuilder fileSbEnd = new StringBuilder(); fileSbEnd.append(LINE_END) .append(PREFIX).append(BOUNDARY).append(PREFIX) .append(LINE_END); dos.write(fileSbEnd.toString().getBytes()); dos.flush(); dos.close(); //接收返回 //打印返回头信息 System.out.println("接口返回头信息:"); Map<String, List<String>> responseHeader = conn.getHeaderFields(); for (Map.Entry<String, List<String>> entry : responseHeader.entrySet()) { System.out.println(entry.getKey()+":" + entry.getValue()); } //打印返回内容 int responseCode = conn.getResponseCode(); String rescontent = ""; if((responseCode+"").startsWith("2")){ //成功 rescontent = new String(InputStreamTOByte(conn.getInputStream())); System.out.println("图片上传成功:"+rescontent); }else{ //失败 rescontent = new String(InputStreamTOByte(conn.getErrorStream())); System.out.println("图片上传失败:"+rescontent); } //验证微信支付返回签名 String Wtimestamp = responseHeader.get("Wechatpay-Timestamp").get(0); String Wnonce = responseHeader.get("Wechatpay-Nonce").get(0); String Wsign = responseHeader.get("Wechatpay-Signature").get(0); //拼装待签名串 StringBuffer ss = new StringBuffer(); ss.append(Wtimestamp).append("\n"); ss.append(Wnonce).append("\n"); ss.append(rescontent).append("\n"); //验证签名 if(verifyRSA(ss.toString(), Base64.decodeBase64(Wsign.getBytes()), rsaPublicKeyFile)) { System.out.println("签名验证成功"); } else { System.out.println("签名验证失败"); } } catch (Exception e) { System.out.println("发送POST请求异常！" + e); e.printStackTrace(); } } } |
多张图片怎么传呢？包括验签