HTTPリクエストツールクラス(Java)

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.net.URLEncoder;
import java.util.Map;

/**
 * @author Administrator
 *
 */
public class HttpUtil {

	/**
	 *   Get      
	 * 
	 * @param url
	 *            URL    ，http://HOST/XX?XX=XX&XXX=XXX
	 * @param charset
	 * @return
	 */
	public static String sendGet(String url, String charset) {
		String result = "";
		BufferedReader in = null;
		try {
			URL realUrl = new URL(url);
			//    URL     
			URLConnection connection = realUrl.openConnection();
			//          
			connection.setRequestProperty("accept", "*/*");
			connection.setRequestProperty("connection", "Keep-Alive");
			connection.setRequestProperty("user-agent",
					"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			//        
			connection.connect();
			//    BufferedReader      URL   
			in = new BufferedReader(new InputStreamReader(
					connection.getInputStream(), charset));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("  GET      ！" + e);
			e.printStackTrace();
		}
		//   finally       
		finally {
			try {
				if (in != null) {
					in.close();
				}
			} catch (Exception e2) {
				e2.printStackTrace();
			}
		}
		return result;
	}

	/**
	 * POST  ，       
	 * @param url     
	 * @param param     
	 * @param charset     
	 */
	public static String sendPostUrl(String url, String param, String charset) {

		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			//    URL     
			URLConnection conn = realUrl.openConnection();
			//          
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent",
					"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			//   POST          
			conn.setDoOutput(true);
			conn.setDoInput(true);
			//   URLConnection        
			out = new PrintWriter(conn.getOutputStream());
			//       
			out.print(param);
			// flush      
			out.flush();
			//   BufferedReader      URL   
			in = new BufferedReader(new InputStreamReader(
					conn.getInputStream(), charset));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("   POST       ！" + e);
			e.printStackTrace();
		}
		//   finally       、   
		finally {
			try {
				if (out != null) {
					out.close();
				}
				if (in != null) {
					in.close();
				}
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		}
		return result;
	}
	/**
	 * POST  ，Map    
	 * @param url     
	 * @param param     
	 * @param charset     
	 */
	public static String sendPost(String url, Map param,
			String charset) {

		StringBuffer buffer = new StringBuffer();
		if (param != null && !param.isEmpty()) {
			for (Map.Entry entry : param.entrySet()) {
				buffer.append(entry.getKey()).append("=")
						.append(URLEncoder.encode(entry.getValue()))
						.append("&");

			}
		}
		buffer.deleteCharAt(buffer.length() - 1);

		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			//    URL     
			URLConnection conn = realUrl.openConnection();
			//          
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent",
					"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			//   POST          
			conn.setDoOutput(true);
			conn.setDoInput(true);
			//   URLConnection        
			out = new PrintWriter(conn.getOutputStream());
			//       
			out.print(buffer);
			// flush      
			out.flush();
			//   BufferedReader      URL   
			in = new BufferedReader(new InputStreamReader(
					conn.getInputStream(), charset));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("   POST       ！" + e);
			e.printStackTrace();
		}
		//   finally       、   
		finally {
			try {
				if (out != null) {
					out.close();
				}
				if (in != null) {
					in.close();
				}
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		}
		return result;
	}

	public static void main(String[] args) {
	}
}