java获取http请求页面的内容的两种方法

package com.eipol.interf.action;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class Testss {
public static void main(String[] args) {
testBeytes();
}

public static void testUrl() {
HttpURLConnection connection = null;
try {
URL getUrl = new URL("http://www.csdn.net/");
connection = (HttpURLConnection) getUrl.openConnection();
connection.connect();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String lines;
StringBuffer sb = new StringBuffer();
while ((lines = reader.readLine()) != null) {
// System.out.println(lines);
sb.append(lines + "\n");
}
reader.close();
System.out.println(sb.toString());
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
connection.disconnect();
} catch (Exception e2) {
e2.printStackTrace();
}
}
}

public static void testBeytes() {
InputStream in = null;
OutputStream out = null;
try {
URL url = new URL("http://www.csdn.net/");
in = url.openStream();
out = System.out;

byte[] buffer = new byte[4096];
int bytes_read;
while ((bytes_read = in.read(buffer)) != -1) {
out.write(buffer, 0, bytes_read);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
in.close();
out.close();
} catch (Exception e2) {
e2.printStackTrace();
}
}
}
}