java發送http的get、post請求

http請求類

package JunitTest;


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.util.List;
import java.util.Map;

public class MyHttpResquest {


    /**
     * 發送get請求   
     * @param url 
     * @param param
     * @return
     */
    public static String sendGet(String url, String param){
        String result = "";
        String urlNameString = url + "?" + param;
        BufferedReader in=null;
        try {
            //1.創建url對象
            URL realUrl = new URL(urlNameString);
            //2.打開和url之間的連接
            URLConnection connection = realUrl.openConnection();
            // 設置通用的請求屬性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            //3.建立實際的連接
            connection.connect();
            //4.獲取所有的響應頭字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍歷所有的響應頭字段
            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()));
           String line;
           while ((line = in.readLine()) != null) {
           result += line;
            }



        } catch (Exception e) {
            System.out.println("發送get請求出現異常！");
            e.printStackTrace();
        }finally {
            try {
                if (in!=null){
                    in.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }


        return  result;
    }


    /**
     * 向指定 URL 發送POST方法的請求
     *
     * @param url   發送請求的 URL
     * @param param 請求參數，請求參數應該是 name1=value1&name2=value2 的形式。
     * @return 所代表遠程資源的響應結果
     */
    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打開和URL之間的連接
            URLConnection conn = realUrl.openConnection();
            // 設置通用的請求屬性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 發送POST請求必須設置如下兩行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 獲取URLConnection對象對應的輸出流
            out = new PrintWriter(conn.getOutputStream());
            // 發送請求參數
            out.print(param);
            // 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()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("發送 POST 請求出現異常！" + e);
            e.printStackTrace();
        }
        //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;
    }


}

測試類

package JunitTest;

import org.junit.Test;

public class TestJunit extends BaseJunitTemplete{
    @Test
    public void test1(){
    String url = "http://localhost:8080/ycsj_loveread/testAcountController";
    String param = "type=1";
    String result = MyHttpResquest.sendGet(url,param);
        System.out.println(result);

    }



}