java模拟http的简单介绍
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本文目录一览：
- 1、怎么用java模拟http请求
- 2、如何用java 模拟发送 HTTP数据包，该如何处理
- 3、怎样用JAVA实现模拟HTTP请求，得到服务器的响应时间等参数
- 4、linux下java 模拟HTTP请求和window下有上面区别吗
- 5、java模拟http请求指定url
- 6、java如何创建一个简单的http接口？
怎么用java模拟http请求
/*
* 得到返回的内容
*/
public static String getResult(String urlStr, String content) {
URL url = null;
HttpURLConnection connection = null;
try {
url = new URL(urlStr);
connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("POST");
connection.setUseCaches(false);
connection.connect();
DataOutputStream out = new DataOutputStream(connection.getOutputStream());
out.writeBytes(content);
out.flush();
out.close();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection
.getInputStream(), "utf-8"));
StringBuffer buffer = new StringBuffer();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
reader.close();
return buffer.toString();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();
}
}
return null;
}
追问：
没注释吗？
追答：
/*
* 得到返回的内容
*/
public static String getResult(String urlStr, String content) {
URL url = null;
HttpURLConnection connection = null;
try {
url = new URL(urlStr);
connection = (HttpURLConnection) url.openConnection();//新建连接实例
connection.setDoOutput(true);//是否打开输出流 true|false
connection.setDoInput(true);//是否打开输入流true|false
connection.setRequestMethod("POST");//提交方法POST|GET
connection.setUseCaches(false);//是否缓存true|false
connection.connect();//打开连接端口
DataOutputStream out = new DataOutputStream(connection.getOutputStream());//打开输出流往对端服务器写数据
out.writeBytes(content);//写数据,也就是提交你的表单 name=xxxpwd=xxx
out.flush();//刷新
out.close();//关闭输出流
BufferedReader reader = new BufferedReader(new InputStreamReader(connection
.getInputStream(), "utf-8"));//往对端写完数据 对端服务器返回数据 ,以BufferedReader流来读取
StringBuffer buffer = new StringBuffer();
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
reader.close();
return buffer.toString();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();//关闭连接
}
}
return null;
}
如何用java 模拟发送 HTTP数据包，该如何处理
左边是发送，右边是接收，
同时左右两边都能实现发送与接收
怎样用JAVA实现模拟HTTP请求，得到服务器的响应时间等参数
a href=";tn=44039180_cprfenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Y4n1Ddn1ubuHI-Pjc1uycz0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6KdThsqpZwYTjCEQLGCpyw9Uz4Bmy-bIi4WUvYETgN-TLwGUv3EnW0LPHfzPHm4PHczPH0YrjTsr0" target="_blank" class="baidu-highlight"java.net/a.*;
public class HttpDemo{
public static void main(String[] args)throws Exception{
URL url = new URL('地址');
HttpURLConnection http = (HttpURLConnection)url.openConnection();
//获取网页的源码
BufferedReader br = new BufferedReader(new InputStreamReader(http.getInputStream()));
String line = "";
while((line=br.readLine())!=null){
System.out.println(line);
}
br.close();
//获取参数：
String value = getRequestProperty(String key);
}
}
linux下java 模拟HTTP请求和window下有上面区别吗
没有区别吧，所有的浏览器都是遵循http协议来发送请求的，有固定的报文头；服务端的返回信息也遵循该协议。
反正我用java写的web应用部署后，linux和window下用浏览器去访问都是一个效果。
java模拟http请求指定url
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet("");
HttpResponse response = httpclient.execute(httpget);
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream instream = entity.getContent();
int l;
byte[] tmp = new byte[2048];
while ((l = instream.read(tmp)) != -1) {
}
}
大体上就是这样了。
java如何创建一个简单的http接口？
1.修改web.xml文件
!-- 模拟HTTP的调用，写的一个http接口 -- servlet servlet-nameTestHTTPServer/servlet-name servlet-classcom.atoz.http.SmsHTTPServer/servlet-class /servlet servlet-mapping servlet-nameTestHTTPServer/servlet-name url-pattern/httpServer/url-pattern /servlet-mapping
2.新建SmsHTTPServer.java文件
package com.atoz.http;
import java.io.IOException; import java.io.PrintWriter;
import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;
import com.atoz.action.order.SendSMSAction; import com.atoz.util.SpringContextUtil;
public class SmsHTTPServer extends HttpServlet { private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=utf-8"); request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); PrintWriter out = response.getWriter(); String content = request.getParameter("content"); //String content = new String(request.getParameter("content").getBytes("iso-8859-1"), "utf-8"); String mobiles = request.getParameter("mobiles"); String businesscode = request.getParameter("businesscode"); String businesstype = request.getParameter("businesstype"); if (content == null || "".equals(content) || content.length() = 0) { System.out.println("http call failed,参数content不能为空,程序退出"); } else if (mobiles == null || "".equals(mobiles) || mobiles.length() = 0) { System.out.println("http call failed,参数mobiles不能为空,程序退出"); } else { /*SendSMSServiceImpl send = new SendSMSServiceImpl();*/ SendSMSAction sendSms = (SendSMSAction) SpringContextUtil.getBean("sendSMS"); sendSms.sendSms(content, mobiles, businesscode, businesstype); System.out.println("---http call success---"); } out.close(); }
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doGet(request, response); } }
3.调用http接口
String content = "测试"; content = URLEncoder.encode(content, "utf-8"); String url = "" + content + "mobiles=15301895007"; URL httpTest; try { httpTest = new URL(url); BufferedReader in; try { in = new BufferedReader(new InputStreamReader( httpTest.openStream())); String inputLine = null; String resultMsg = null; //得到返回信息的xml字符串 while ((inputLine = in.readLine()) != null) if(resultMsg != null){ resultMsg += inputLine; }else { resultMsg = inputLine; } in.close(); } catch (MalformedURLException e) { e.printStackTrace(); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); }
打字不易，望采纳，谢谢
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