httpclient的post请求并处理json格式响应数据

最新推荐文章于 2025-07-01 11:14:23 发布

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本文介绍了如何利用HttpClient库发送POST请求，并且处理返回的JSON格式响应数据。首先创建HttpClient对象，然后设置请求头为'Content-Type: application/json;charset=UTF-8'，接着将参数转化为JSON字符串，通过StringEntity设置到HttpPost对象中。最后执行请求，获取响应内容并进行UTF-8解码，转换为JSONObject进行解析。

HttpClient client = new HttpClient();

form表单提交数据：

PostMethod post = new PostMethod(具体的url);
post.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=utf-8");
NameValuePair[] param = {  
                new NameValuePair("postid",expressNum),  
                new NameValuePair("type",expressCompany)
                };  
        post.setRequestBody(param);  
        post.releaseConnection(); 
        client.executeMethod(post);
        //处理json串
        String response = post.getResponseBodyAsString();
        JSONObject jsonStr = JSONObject.fromObject(response);
        JSONArray jsonArray = jsonStr.getJSONArray("data");
        //循环添加到infolist中
        if (jsonArray!=null&&jsonArray.size()>0) {
			for (int i=0;i<jsonArray.size();i++) {
				LogisticsInfoVO v=new LogisticsInfoVO();
				JSONObject jsonObject = jsonArray.getJSONObject(i);
				v.setArriveTime(DateUtils.StringToDate(jsonObject.get("time").toString(),"yyyy-MM-dd HH:mm:ss"));
				v.setArriveAddress(jsonObject.getString("location"));
				v.setCurrentRemark(jsonObject.getString("context"));
				infoList.add(v);
			}

json格式提交数据：

CloseableHttpClient client = HttpClients.createDefault();

HttpPost httpPost = new HttpPost(url);
httpPost.setHeader("Content-Type", "application/json;charset=UTF-8");

String account= "";//用户账号
String password= "";//密码，MD5加密

Map<String,Object> paramMap = new HashMap<String, Object>();
paramMap.put("account", account);
paramMap.put("password", password);

Gson gson = new Gson();
String parameter = gson.toJson(paramMap);
StringEntity se = new StringEntity(parameter,Charset.forName("UTF-8"));//解决请求参数乱码
se.setContentType("text/json");

httpPost.setEntity(se);

CloseableHttpResponse response = client.execute(httpPost);
HttpEntity entity = response.getEntity();
String result = EntityUtils.toString(entity, "UTF-8");//解决响应乱码
JSONObject jsonResult = JSONObject.fromObject(result);