java發送GET/POST請求工具類

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;

/**

Java HTTP請求對象 發送GET/POST請求工具類
*/
public class HttpRequester {
private String defaultContentEncoding;
public HttpRequester() {

 this.defaultContentEncoding = Charset.defaultCharset().name();

}
/**

發送GET請求

@param urlString  URL地址
@return 響應對象
@throws IOException
*/
public HttpRespons sendGet(String urlString) throws IOException {
 return this.send(urlString, "GET", null, null);
}
/**

發送GET請求

@param urlString  URL地址
@param params 參數集合
@return 響應對象
@throws IOException
*/
public HttpRespons sendGet(String urlString, Map<String, String> params) throws IOException {
 return this.send(urlString, "GET", params, null);
}
/**

發送GET請求

@param urlString URL地址
@param params 參數集合
@param propertys 請求屬性
@return 響應對象
@throws IOException
*/
public HttpRespons sendGet(String urlString, Map<String, String> params, Map<String, String> propertys)

 throws IOException {

return this.send(urlString, "GET", params, propertys);
}
/**

發送POST請求

@param urlString URL地址
@return 響應對象
@throws IOException
*/
public HttpRespons sendPost(String urlString) throws IOException {
 return this.send(urlString, "POST", null, null);
}
/**

發送POST請求

@param urlString URL地址
@param params 參數集合
@return 響應對象
@throws IOException
*/
public HttpRespons sendPost(String urlString, Map<String, String> params) throws IOException {
 return this.send(urlString, "POST", params, null);
}
/**

發送POST請求

@param urlString URL地址
@param params 參數集合
@param propertys 請求屬性
@return 響應對象
@throws IOException
*/
public HttpRespons sendPost(String urlString, Map<String, String> params, Map<String, String> propertys)

 throws IOException {

return this.send(urlString, "POST", params, propertys);
}
/**

發送HTTP請求

@param urlString 地址
@param method  get/post
@param parameters  添加由鍵值對指定的請求參數
@param propertys  添加由鍵值對指定的一般請求屬性
@return 響映對象
@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));
     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));
 }
 urlConnection.getOutputStream().write(param.toString().getBytes());
 urlConnection.getOutputStream().flush();
 urlConnection.getOutputStream().close();

}
 return this.makeContent(urlString, urlConnection);
}
/**

得到響應對象

@param urlConnection
@return 響應對象
@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();

}
}
/**

默認的響應字符集
*/
public String getDefaultContentEncoding() {
 return this.defaultContentEncoding;
}
/**

設置默認的響應字符集
*/
public void setDefaultContentEncoding(String defaultContentEncoding) {
 this.defaultContentEncoding = defaultContentEncoding;
}
}</pre>