这篇文章给大家介绍jdk的get和post请求的示例分析,内容非常详细,感兴趣的小伙伴们可以参考借鉴,希望对大家能有所帮助。

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OutputStreamWriter out = null;
HttpURLConnection conn = null;
BufferedReader reader = null;
StringBuilder response = new StringBuilder();
URL httpUrl = null;
try{
httpUrl = new URL("http://www.baidu.com");
//建立连接
conn = (HttpURLConnection) httpUrl.openConnection();
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setUseCaches(false);//设置不要缓存
conn.setInstanceFollowRedirects(true);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.connect();
out = new OutputStreamWriter(conn.getOutputStream());
out.write(params);
out.flush();
//读取响应
reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String lines;
while ((lines = reader.readLine()) != null) {
lines = new String(lines.getBytes(), "utf-8");
response.append(lines);
}
System.out.println(response.toString());
}catch(Exception e){
e.printStackTrace();
}/** * 发送GET请求 * * @param url 目的地址 * @param parameters 请求参数,Map类型。 * @return 远程响应结果 */ public static String sendGet(String url, Mapparameters) { StringBuilder result = new StringBuilder(); BufferedReader in = null;// 读取响应输入流 StringBuilder sbParams = new StringBuilder();// 存储参数 String params = "";// 编码之后的参数 try { // 编码请求参数 for (String name : parameters.keySet()) { sbParams.append(name).append("=").append(java.net.URLEncoder.encode(parameters.get(name), "UTF-8")).append("&"); } String requestParam = sbParams.toString(); params = requestParam.substring(0, requestParam.length() - 1); String fullUrl = url + "?" + params; logger.info("get请求:" + fullUrl); // 创建URL对象 URL connURL = new URL(fullUrl); // 打开URL连接 HttpURLConnection httpConn = (HttpURLConnection) connURL.openConnection(); // 设置通用属性 httpConn.setRequestProperty("Accept", "*/*"); httpConn.setRequestProperty("Connection", "Keep-Alive"); httpConn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)"); // 建立实际的连接 httpConn.connect(); // Map > headers = httpConn.getHeaderFields(); // 定义BufferedReader输入流来读取URL的响应,并设置编码方式 in = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), StandardCharsets.UTF_8)); String line; // 读取返回的内容 while ((line = in.readLine()) != null) { result.append(line); } logger.info("get请求结果:" + result.toString()); } catch (Exception e) { e.printStackTrace(); } finally { try { if (in != null) { in.close(); } } catch (IOException ex) { ex.printStackTrace(); } } return result.toString(); }
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