Http Request and Http Response in Java

//http请求类
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.Charset;
import java.util.Map;
import java.util.Vector;
/**
* HTTP请求
*/
public class HttpRequester
{
/**
* 默认响应字符集
*/
private String defaultContentEncoding;
public HttpRequester()
{
this.defaultContentEncoding = Charset.defaultCharset().name();
}
/**
* 发送GET请求
* @param urlString URL地址
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendGet(String urlString) throws IOException
{
return this.send(urlString, "GET", null, null);
}
/**
* 发送GET请求
* @param urlString URL地址
* @param params 参数集合
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendGet(String urlString, Map<String, String> params) throws IOException
{
return this.send(urlString, "GET", params, null);
}
/**
* 发送GET请求
* @param urlString URL地址
* @param params 参数集合
* @param propertys 请求属性
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendGet(String urlString, Map<String, String> params, Map<String, String> propertys) throws IOException
{
return this.send(urlString, "GET", params, propertys);
}
/**
* 发送POST请求
* @param urlString URL地址
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendPost(String urlString) throws IOException
{
return this.send(urlString, "POST", null, null);
}
/**
* 发送POST请求
* @param urlString URL地址
* @param params 参数集合
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendPost(String urlString, Map<String, String> params) throws IOException
{
return this.send(urlString, "POST", params, null);
}
/**
* 发送POST请求
* @param urlString URL地址
* @param params 参数集合
* @param propertys 请求属性
* @return 响应对象
* @throws IOException
*/
public HttpRespons sendPost(String urlString, Map<String, String> params, Map<String, String> propertys) throws IOException
{
return this.send(urlString, "POST", params, propertys);
}
/**
* 发送HTTP请求
* @param urlString
* @return 响应对象
* @throws IOException
*/
private HttpRespons send(String urlString, String method, Map<String, String> parameters, Map<String, String> propertys) throws IOException
{
HttpURLConnection urlConnection = null;
if (method.equalsIgnoreCase("GET") && parameters != null)
{
StringBuffer param = new StringBuffer();
int i = 0;
for (String key : parameters.keySet())
{
if (i == 0)
param.append("?");
else
param.append("&");
param.append(key).append("=").append(parameters.get(key));
// param.append(parameters.get(key));
i++;
}
urlString += param;
}
URL url = new URL(urlString);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod(method);
urlConnection.setDoOutput(true);
urlConnection.setDoInput(true);
urlConnection.setUseCaches(false);
if (propertys != null)
{
for (String key : propertys.keySet())
{
urlConnection.addRequestProperty(key, propertys.get(key));
}
}
if (method.equalsIgnoreCase("POST") && parameters != null)
{
StringBuffer param = new StringBuffer();
for (String key : parameters.keySet())
{
param.append("&");
param.append(key).append("=").append(parameters.get(key));
// param.append(parameters.get(key));
}
urlConnection.getOutputStream().write(param.toString().getBytes());
urlConnection.getOutputStream().flush();
urlConnection.getOutputStream().close();
}
return this.makeContent(urlString, urlConnection);
}
/**
* 得到响应对象
* @param urlConnection
* @return 响应对象
* @throws IOException
*/
private HttpRespons makeContent(String urlString, HttpURLConnection urlConnection) throws IOException
{
HttpRespons httpResponser = new HttpRespons();
try
{
InputStream in = urlConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));
httpResponser.contentCollection = new Vector<String>();
StringBuffer temp = new StringBuffer();
String line = bufferedReader.readLine();
while (line != null)
{
httpResponser.contentCollection.add(line);
temp.append(line).append("\r\n");
line = bufferedReader.readLine();
}
bufferedReader.close();
String ecod = urlConnection.getContentEncoding();
if (ecod == null)
ecod = this.defaultContentEncoding;
httpResponser.urlString = urlString;
httpResponser.defaultPort = urlConnection.getURL().getDefaultPort();
httpResponser.file = urlConnection.getURL().getFile();
httpResponser.host = urlConnection.getURL().getHost();
httpResponser.path = urlConnection.getURL().getPath();
httpResponser.port = urlConnection.getURL().getPort();
httpResponser.protocol = urlConnection.getURL().getProtocol();
httpResponser.query = urlConnection.getURL().getQuery();
httpResponser.ref = urlConnection.getURL().getRef();
httpResponser.userInfo = urlConnection.getURL().getUserInfo();
httpResponser.content = new String(temp.toString().getBytes(), ecod);
httpResponser.contentEncoding = ecod;
httpResponser.code = urlConnection.getResponseCode();
httpResponser.message = urlConnection.getResponseMessage();
httpResponser.contentType = urlConnection.getContentType();
httpResponser.method = urlConnection.getRequestMethod();
httpResponser.connectTimeout = urlConnection.getConnectTimeout();
httpResponser.readTimeout = urlConnection.getReadTimeout();
return httpResponser;
}
catch (IOException e)
{
throw e;
}
finally
{
if (urlConnection != null)
urlConnection.disconnect();
}
}
/**
* 默认的响应字符集
*/
public String getDefaultContentEncoding()
{
return this.defaultContentEncoding;
}
/**
* 设置默认的响应字符集
*/
public void setDefaultContentEncoding(String defaultContentEncoding)
{
this.defaultContentEncoding = defaultContentEncoding;
}
}

import java.util.Vector;
/**
* HTTP响应处理类
*/
public class HttpRespons
{
String urlString;
int defaultPort;
String file;
String host;
String path;
int port;
String protocol;
String query;
String ref;
String userInfo;
String contentEncoding;
String content;
String contentType;
public int code;
String message;
String method;
int connectTimeout;
int readTimeout;
Vector<String> contentCollection;
public static final int CODE_OK = 200;
public String getContent()
{
return content;
}
public String getContentType()
{
return contentType;
}
public int getCode()
{
return code;
}
public String getMessage()
{
return message;
}
public Vector<String> getContentCollection()
{
return contentCollection;
}
public String getContentEncoding()
{
return contentEncoding;
}
public String getMethod()
{
return method;
}
public int getConnectTimeout()
{
return connectTimeout;
}
public int getReadTimeout()
{
return readTimeout;
}
public String getUrlString()
{
return urlString;
}
public int getDefaultPort()
{
return defaultPort;
}
public String getFile()
{
return file;
}
public String getHost()
{
return host;
}
public String getPath()
{
return path;
}
public int getPort()
{
return port;
}
public String getProtocol()
{
return protocol;
}
public String getQuery()
{
return query;
}
public String getRef()
{
return ref;
}
public String getUserInfo()
{
return userInfo;
}
}

//测试客户端
import java.io.IOException;
public class TestHttp
{
public static void main(String[] args) throws IOException
{
HttpRequester request = new HttpRequester();
HttpRespons hr = request.sendGet("http://www.12306.cn/mormhweb/");
String rsContent = hr.getContent();
System.out.println(rsContent);
}
}