java post请求的表单提交和json提交简单小结

2019-01-10 07:48:50来源：博客园阅读 ()

在java实现http请求时有分为多种参数的传递方式，以下给出通过form表单提交和json提交的参数传递方式：

 1 public String POST_FORM(String url, Map<String,String> map,String encoding) throws ParseException, IOException{  
 2         String body = "";  
 3         //创建httpclient对象  
 4         CloseableHttpClient client = HttpClients.createDefault();  
 5         //创建post方式请求对象  
 6         HttpPost httpPost = new HttpPost(url);  
 7         
 8         List<BasicNameValuePair> nvps = new ArrayList<BasicNameValuePair>();  
 9         if(map!=null){  
10             for (Entry<String, String> entry : map.entrySet()) {  
11                 nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));  
12             }
13         }  
14         //设置参数到请求对象中  
15         httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding));
16         
17         //设置连接超时时间 为3秒 
18         RequestConfig config = RequestConfig.custom().setConnectTimeout(3000).setConnectionRequestTimeout(3000).setSocketTimeout(5000).build();
19         httpPost.setConfig(config);
20         System.out.println("请求地址："+url);  
21         System.out.println("请求参数："+nvps.toString());  
22         
23         //1.表单方式提交数据   简单举例，上面给出的是map参数
24 //        List<BasicNameValuePair> pairList = new ArrayList<BasicNameValuePair>(); 
25 //        pairList.add(new BasicNameValuePair("name", "admin"));
26 //        pairList.add(new BasicNameValuePair("pass", "123456"));
27 //        httpPost.setEntity(new UrlEncodedFormEntity(pairList, "utf-8"));   
28 
29         //2.json方式传值提交  
30 //        JSONObject jsonParam = new JSONObject();
31 //        jsonParam.put("name", "admin");
32 //        jsonParam.put("pass", "123456");
33 //        StringEntity entity = new StringEntity(jsonParam.toString(), "utf-8");// 解决中文乱码问题
34 //        entity.setContentEncoding("UTF-8");
35 //        entity.setContentType("application/json");
36 //        httpPost.setEntity(entity);
37         
38         //可以设置header信息 此方法不设置
39         //指定报文头【Content-type】、【User-Agent】  
40 //        httpPost.setHeader("Content-type", "application/json");  
41 //        httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
42         
43         //执行请求操作，并拿到结果（同步阻塞）  
44         CloseableHttpResponse response = client.execute(httpPost);  
45         //获取结果实体  
46         HttpEntity entity = response.getEntity();  
47         if (entity != null) {
48             //按指定编码转换结果实体为String类型  
49             body = EntityUtils.toString(entity, encoding);  
50         }  
51         EntityUtils.consume(entity);  
52         //释放链接  
53         response.close();  
54         return body;  
55     }