Java网络编程之URL

来源：互联网发布：郑州丰泽教育编程编辑：程序博客网时间：2024/05/02 02:03
图一：
示例代码：
import java.io.IOException;import java.io.InputStream;import java.net.MalformedURLException;import java.net.URL;import java.net.URLConnection;import org.junit.Test;public class TestURL {@Testpublic void testOpenStream() {InputStream is = null;try {URL url = new URL("http://v.youku.com/v_show/id_XMTMzMzkxNzg2MA==.html");/*System.out.println(url.getProtocol());System.out.println(url.getHost());System.out.println(url.getPath());System.out.println(url.getFile());System.out.println(url.getRef());System.out.println(url.getQuery());*/is = url.openStream();byte[] b = new byte[2048];int len;while((len = is.read(b)) != -1) {String str = new String(b, 0, len);System.out.print(str);}} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {if(is != null) {try {is.close();} catch (IOException e) {e.printStackTrace();}}}}//如果既有数据的输入，又有数据的输出，则考虑使用URLConnection@Testpublic void testURLConnection() {InputStream is = null;try {URL url = new URL("http://v.youku.com/v_show/id_XMTMzMzkxNzg2MA==.html");URLConnection urlConn = url.openConnection();is = urlConn.getInputStream();byte[] b = new byte[20];int len;while((len = is.read(b)) != -1) {String str = new String(b, 0, len);System.out.print(str);}} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} finally {if(is != null) {try {is.close();} catch (IOException e) {e.printStackTrace();}}}}}
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