如題,傳送GET或Post請求的工具類,  這個在很多專案中都會有用到的

package util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

import com.alibaba.druid.support.logging.Log;
import com.alibaba.druid.support.logging.LogFactory;

public class HttpUtil {
	static Log log=LogFactory.getLog(HttpUtil.class);
	public static class ResponseContent {
		private int statusCode;
		private String content;

		public ResponseContent(int statusCode, String content) {
			this.statusCode = statusCode;
			this.content = content;
		}

		public int getStatusCode() {
			return this.statusCode;
		}

		public String getContent() {
			return this.content;
		}
	}
	

	/**
	 * 向指定 URL 傳送POST方法的請求
	 * 
	 * @param url
	 *            傳送請求的 URL
	 * @param param
	 *            請求引數，請求引數應該是 name1=value1&name2=value2 的形式。
	 * @return 所代表遠端資源的響應結果
	 */
	public static String sendPost(String url, String param) {
		OutputStream out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			// 開啟和URL之間的連線
			URLConnection conn = realUrl.openConnection();
			conn.setConnectTimeout(3000);
			conn.setReadTimeout(5000);
			// 設定通用的請求屬性
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 傳送POST請求必須設定如下兩行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			// 獲取URLConnection物件對應的輸出流
			out = conn.getOutputStream();
			// 傳送請求引數
			// out.print(param.getBytes("UTF-8"));
			out.write(param.getBytes("UTF-8"));
			// flush輸出流的緩衝
			out.flush();
			// 定義BufferedReader輸入流來讀取URL的響應
			in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			log.error(e.getMessage());
		}
		// 使用finally塊來關閉輸出流、輸入流
		finally {
			try {
				if (out != null) {
					out.close();
				}
				if (in != null) {
					in.close();
				}
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		}
		return result;
	}

	/** 
     * 向指定URL傳送GET方法的請求 
     *  
     * @param url 
     *            傳送請求的URL 
     * @param param 
     *            請求引數，請求引數應該是 name1=value1&name2=value2 的形式。 
     * @return URL 所代表遠端資源的響應結果 
     */  
    public static String sendGet(String url, String param) {  
        String result = "";  
        BufferedReader in = null;  
        try {  
            String urlNameString = url;  
            URL realUrl = new URL(urlNameString);  
            // 開啟和URL之間的連線  
            URLConnection connection = realUrl.openConnection();  
            // 設定通用的請求屬性  
            connection.setRequestProperty("accept", "*/*");  
            connection.setRequestProperty("connection", "Keep-Alive");  
            connection.setRequestProperty("user-agent",  
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");  
            // 建立實際的連線  
            connection.connect();  
            // 獲取所有響應頭欄位  
            Map<String, List<String>> map = connection.getHeaderFields();  
            // 遍歷所有的響應頭欄位  
            /*for (String key : map.keySet()) {  
                System.out.println(key + "--->" + map.get(key));  
            }  */
            // 定義 BufferedReader輸入流來讀取URL的響應  
            in = new BufferedReader(new InputStreamReader(  
                    connection.getInputStream())); //這裡如果出現亂碼，請使用帶編碼的InputStreamReader構造方法，將需要的編碼設定進去</span>  
            String line;  
            while ((line = in.readLine()) != null) {  
                result += line;  
            }  
        } catch (Exception e) {  
            System.out.println("傳送GET請求出現異常！" + e);  
            e.printStackTrace();  
        }  
        // 使用finally塊來關閉輸入流  
        finally {  
            try {  
                if (in != null) {  
                    in.close();  
                }  
            } catch (Exception e2) {  
                e2.printStackTrace();  
            }  
        }  
        return result;  
    }  
}