HttpURLConnection 抓去页面返回始终是 Null

0 0

HttpURLConnection 抓去页面返回始终是 Null0


package util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;

import sun.net.www.protocol.http.HttpURLConnection;

public class TestURL {
	
	
	public static void main(String[] args) {
		try {
			URL url = new URL("http://www.baidu.com");
			HttpURLConnection urlc =(HttpURLConnection) url.openConnection();
			//urlc.getContent();
			urlc.connect();
			BufferedReader br = new BufferedReader(new InputStreamReader(urlc.getInputStream(),"UTF-8"));
			StringBuffer sb = new StringBuffer();
			while (br.readLine() != null) {
				sb.append(br.readLine());
			}
			System.out.println(sb.toString());
			br.close();
			urlc.disconnect();
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	
	
}

SpringMVC HttpURLConnection

2013年4月28日 14:55

dbh0512
0
0 0 6

1个答案按时间排序按投票排序

0 0

采纳的答案

哥们送你个demo，你慢慢看吧，貌似你：
构建

BufferedReader br = new BufferedReader(new InputStreamReader(urlc.getInputStream(),"UTF-8"));

的时候应该这样：

reader = new BufferedReader(new InputStreamReader(connection
					.getInputStream(),"UTF-8"));

下面是demo：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class TestUrlConnection {

	public static void main(String[] args) {
		BufferedReader reader = null;
		HttpURLConnection connection = null;
		try {
			// 新建一个URL对象，指定到请求的url.
			URL url = new URL("http://www.baidu.com");
			connection = (HttpURLConnection) url.openConnection();

			reader = new BufferedReader(new InputStreamReader(connection
					.getInputStream(),"UTF-8")); 
			String line = null;
			while ((line = reader.readLine()) != null) {
				System.out.println(line);
			}
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				reader.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
			connection.disconnect();
		}
	}

}

2013年4月28日 15:08