import java.io.BufferedReader; import java.io.DataOutputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.HttpURLConnection; import java.net.URL; import org.json.JSONArray; import org.json.JSONObject; public class GetJsonData { public static String getJsonData(JSONObject jsonParam,String urls) { StringBuffer sb=new StringBuffer(); try { ; // 创建url资源 URL url = new URL(urls); // 建立http连接 HttpURLConnection conn = (HttpURLConnection) url.openConnection(); // 设置允许输出 conn.setDoOutput(true); // 设置允许输入 conn.setDoInput(true); // 设置不用缓存 conn.setUseCaches(false); // 设置传递方式 conn.setRequestMethod("POST"); // 设置维持长连接 conn.setRequestProperty("Connection", "Keep-Alive"); // 设置文件字符集: conn.setRequestProperty("Charset", "UTF-8"); // 转换为字节数组 byte[] data = (jsonParam.toString()).getBytes(); // 设置文件长度 conn.setRequestProperty("Content-Length", String.valueOf(data.length)); // 设置文件类型: conn.setRequestProperty("contentType", "application/json"); // 开始连接请求 conn.connect(); OutputStream out = new DataOutputStream(conn.getOutputStream()) ; // 写入请求的字符串 out.write((jsonParam.toString()).getBytes()); out.flush(); out.close(); System.out.println(conn.getResponseCode()); // 请求返回的状态 if (HttpURLConnection.HTTP_OK == conn.getResponseCode(){ System.out.println("连接成功"); // 请求返回的数据 InputStream in1 = conn.getInputStream(); try { String readLine=new String(); BufferedReader responseReader=new BufferedReader(new InputStreamReader(in1,"UTF-8")); while((readLine=responseReader.readLine())!=null){ sb.append(readLine).append(" "); } responseReader.close(); System.out.println(sb.toString()); } catch (Exception e1) { e1.printStackTrace(); } } else { System.out.println("error++"); } } catch (Exception e) { } return sb.toString(); } public static void main(String[] args) { JSONObject jsonParam = new JSONObject(); jsonParam.put("id", "1401_1406"); jsonParam.put("device_size", "480x720"); String url="www.baidu.com"; String data=GetJsonData.getJsonData(jsonParam,url); //返回的是一个[{}]格式的字符串时: JSONArray jsonArray = new JSONArray(data); //返回的是一个{}格式的字符串时: /*JSONObject obj= new JSONObject(data);*/ } }
package wzh.Http; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.URL; import java.net.URLConnection; import java.util.List; import java.util.Map; public class HttpRequest { /** * 向指定URL发送GET方法的请求 * * @param url * 发送请求的URL * @param param * 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 * @return URL 所代表远程资源的响应结果 */ public static String sendGet(String url, String param) { String result = ""; BufferedReader in = null; try { String urlNameString = url + "?" + param; URL realUrl = new URL(urlNameString); // 打开和URL之间的连接 URLConnection connection = realUrl.openConnection(); // 设置通用的请求属性 connection.setRequestProperty("accept", "*/*"); connection.setRequestProperty("connection", "Keep-Alive"); connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 建立实际的连接 connection.connect(); // 获取所有响应头字段 Map<String, List<String>> map = connection.getHeaderFields(); // 遍历所有的响应头字段 for (String key : map.keySet()) { System.out.println(key + "--->" + map.get(key)); } // 定义 BufferedReader输入流来读取URL的响应 in = new BufferedReader(new InputStreamReader( connection.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("发送GET请求出现异常！" + e); e.printStackTrace(); } // 使用finally块来关闭输入流 finally { try { if (in != null) { in.close(); } } catch (Exception e2) { e2.printStackTrace(); } } return result; } /** * 向指定 URL 发送POST方法的请求 * * @param url * 发送请求的 URL * @param param * 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。 * @return 所代表远程资源的响应结果 */ public static String sendPost(String url, String param) { PrintWriter out = null; BufferedReader in = null; String result = ""; try { URL realUrl = new URL(url); // 打开和URL之间的连接 URLConnection conn = realUrl.openConnection(); // 设置通用的请求属性 conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); // 发送POST请求必须设置如下两行 conn.setDoOutput(true); conn.setDoInput(true); // 获取URLConnection对象对应的输出流 out = new PrintWriter(conn.getOutputStream()); // 发送请求参数 out.print(param); // flush输出流的缓冲 out.flush(); // 定义BufferedReader输入流来读取URL的响应 in = new BufferedReader( new InputStreamReader(conn.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } } catch (Exception e) { System.out.println("发送 POST 请求出现异常！"+e); e.printStackTrace(); } //使用finally块来关闭输出流、输入流 finally{ try{ if(out!=null){ out.close(); } if(in!=null){ in.close(); } } catch(IOException ex){ ex.printStackTrace(); } } return result; } }
发送post 参数json
/** * 发送post请求 * @param url 路径 * @param jsonObject 参数(json类型) * @param encoding 编码格式 * @return * @throws ParseException * @throws IOException */ public static String send(String url, JSONObject jsonObject,String encoding) throws ParseException, IOException{ String body = ""; //创建httpclient对象 CloseableHttpClient client = HttpClients.createDefault(); //创建post方式请求对象 HttpPost httpPost = new HttpPost(url); //装填参数 StringEntity s = new StringEntity(jsonObject.toString(), "utf-8"); s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json")); //设置参数到请求对象中 httpPost.setEntity(s); System.out.println("请求地址："+url); // System.out.println("请求参数："+nvps.toString()); //设置header信息 //指定报文头【Content-type】、【User-Agent】 // httpPost.setHeader("Content-type", "application/x-www-form-urlencoded"); httpPost.setHeader("Content-type", "application/json"); httpPost.setHeader("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)"); //执行请求操作，并拿到结果（同步阻塞） CloseableHttpResponse response = client.execute(httpPost); //获取结果实体 HttpEntity entity = response.getEntity(); if (entity != null) { //按指定编码转换结果实体为String类型 body = EntityUtils.toString(entity, encoding); } EntityUtils.consume(entity); //释放链接 response.close(); return body; }
import java.io.BufferedReader; import java.io.InputStream; import java.io.InputStreamReader; import net.sf.json.JSONObject; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicHeader; import org.apache.http.protocol.HTTP; public abstract class TestSend { // String URL = "url"; public static void main(String[] args) { JSONObject jsobj1 = new JSONObject(); jsobj1.put("key","value"); //System.out.println(jsobj1); post(jsobj1,"url");//注册 } public static String post(JSONObject json,String URL) { HttpClient client = new DefaultHttpClient(); HttpPost post = new HttpPost(URL); post.setHeader("Content-Type", "application/json"); post.addHeader("Authorization", "Basic YWRtaW46"); String result = ""; try { StringEntity s = new StringEntity(json.toString(), "utf-8"); s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json")); post.setEntity(s); // 发送请求 HttpResponse httpResponse = client.execute(post); // 获取响应输入流 InputStream inStream = httpResponse.getEntity().getContent(); BufferedReader reader = new BufferedReader(new InputStreamReader( inStream, "utf-8")); StringBuilder strber = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) strber.append(line + " "); inStream.close(); result = strber.toString(); System.out.println(result); if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) { System.out.println("请求服务器成功，做相应处理"); } else { System.out.println("请求服务端失败"); } } catch (Exception e) { System.out.println("请求异常"); throw new RuntimeException(e); } return result; } }