Java 调接口类似postman用form-data方式post传输数据

转自Java HttpClient 发送multipart form-data的Post请求

public static String gateway(String param,String paramvalue,String servicename,String interface_id) throws Exception{
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        String url = URL + "jpaas-jags-server/interface/gateway";
        HttpPost httpPost = new HttpPost(url);
        CloseableHttpClient client = HttpClients.createDefault();
        String respContent = null;

        MultipartEntityBuilder builder = MultipartEntityBuilder.create();

        Date d= new Date();
        String timestamp = String.valueOf(d.getTime());
        String time = sdf.format(d);

        JSONObject biz_contentJson = new JSONObject();

        JSONObject paramsJson = new JSONObject();

        paramsJson.put(param,paramvalue);
        biz_contentJson.put("appmark",APPMARK);
        biz_contentJson.put("time",time);
        biz_contentJson.put("sign",encodeMd5(APPMARK+APPWORD+time));
        biz_contentJson.put("servicename",servicename);
        biz_contentJson.put("params",paramsJson);


        builder.addTextBody("app_id",APP_ID,ContentType.MULTIPART_FORM_DATA);
        builder.addTextBody("interface_id",interface_id,ContentType.MULTIPART_FORM_DATA);
        builder.addTextBody("version","1.0",ContentType.MULTIPART_FORM_DATA);
        builder.addTextBody("header","{}",ContentType.MULTIPART_FORM_DATA);
        builder.addTextBody("charset","UTF-8",ContentType.MULTIPART_FORM_DATA);
        builder.addTextBody("timestamp",timestamp,ContentType.MULTIPART_FORM_DATA);
        builder.addTextBody("origin","0",ContentType.MULTIPART_FORM_DATA);

        builder.addTextBody("biz_content",biz_contentJson.toString(),ContentType.MULTIPART_FORM_DATA);

        String sign = "";
        sign = getSign(builder);
        builder.addTextBody("sign",sign,ContentType.MULTIPART_FORM_DATA);


        HttpEntity multipart = builder.build();

        HttpResponse resp = null;

        httpPost.setEntity(multipart);
        resp = client.execute(httpPost);

        HttpEntity he = resp.getEntity();
        respContent = EntityUtils.toString(he, "UTF-8");

        System.out.println(respContent);

        return respContent;
    }