url and uri

Author: laizhihuan

src/urlAndUri/ContentGetter.java

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+package urlAndUri;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+/**
+ * @Description: download object
+ * @Author     : lzh laizhihuan@basecity.com
+ * @Date       : 2013-3-24 下午12:12:07
+ *
+ */
+public class ContentGetter {
+	public static void main(String[] args) {
+		if(args.length == 0) return;
+		
+		try {
+			URL u = new URL(args[0]);
+			Object o = u.getContent();
+			System.out.println("I got a " + o.getClass().getName());
+		} catch (MalformedURLException e) {
+			System.err.println(e);
+		} catch (IOException e) {
+			System.err.println(e);
+		}
+	}
+}

src/urlAndUri/EncoderTest.java

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+package urlAndUri;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+
+/**
+ * @Description: x-www-form-urlencoded的字符串
+ * @Author     : lzh laizhihuan@basecity.com
+ * @Date       : 2013-3-24 下午4:03:45
+ *
+ */
+public class EncoderTest {
+	public static void main(String[] args) throws UnsupportedEncodingException {
+		System.out.println(URLEncoder.encode("This string has spaces", "UTF-8"));
+		System.out.println(URLEncoder.encode("This*string*has*asterisks", "UTF-8"));
+		System.out.println(URLEncoder.encode("This+string+has+pluses", "UTF-8"));
+		System.out.println(URLEncoder.encode("This/string/has/slashes", "UTF-8"));
+		System.out.println(URLEncoder.encode("This\"string\"has\"quote\"marks", "UTF-8"));
+		System.out.println(URLEncoder.encode("This:string:has:colons", "UTF-8"));
+		
+	}
+}

src/urlAndUri/LowPortScanner.java

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+package urlAndUri;
+
+import java.io.IOException;
+import java.net.Socket;
+import java.net.UnknownHostException;
+
+/**
+ * @Description: 查看指定主机上前1024个端口那些可以提供TCP服务
+ * @Author     : lzh laizhihuan@basecity.com
+ * @Date       : 2013-3-27 下午2:42:47
+ *
+ */
+public class LowPortScanner {
+	public static void main(String[] args) {
+		String host = "127.0.0.1";
+		for(int i=1; i<1024; i++) {
+			try {
+				Socket s = new Socket(host,i);
+				System.out.println("There is a server on port " + i + " of " + host);
+			} catch (UnknownHostException e) {
+				System.err.println(e);
+			} catch (IOException e) {
+			}
+		}
+	}
+}

src/urlAndUri/SourceViewer.java

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+package urlAndUri;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+/**
+ * @Description: download web page
+ * @Author     : lzh laizhihuan@basecity.com
+ * @Date       : 2013-3-24 下午12:04:28
+ *
+ */
+public class SourceViewer {
+	public static void main(String[] args) throws IOException {
+		String url = "http://www.oreilly.com";
+		try {
+			URL u = new URL(url);
+			InputStream in = u.openStream();
+			
+			in = new BufferedInputStream(in);
+			Reader r = new InputStreamReader(in);
+			
+			int c;
+			while((c = r.read()) != -1) {
+				System.out.print((char) c);
+			}
+			
+		} catch (MalformedURLException e) {
+			System.err.println(url + "is not a pareseable URL");
+			
+		}
+		
+	}
+}