[工学]实验4java网络编程基础.doc

实验四 网络编程基础一、实验目的：1、掌握InetAddress类的使用。2、掌握URL类的使用和概念。3、掌握URLConncetion类的使用和概念。二、实验内容：1、使用InetAddress类的方法获取/的主机的IP地址。2、使用InetAddress类的方法获取本地机的名称和IP地址。3、运行下面的程序，掌握获取URL信息的一些方法。import .*;import java.io.*; class URLTest public static void main(String args)tryURL url=new URL(http:/localhost:8080/);System.out.println(文件名:+url.getFile();System.out.println(主机名:+url.getHost();System.out.println(端口号:+url.getPort();System.out.println(协议名:+url.getProtocol();catch(MalformedURLException e)e.printStackTrace();注意：需要先启动tomcat。4、编程实现利用URL类获取网络资源的程序。import .*;import java.io.*;public class URLRead public static void main(String args) throws Exception URL web = new URL(http:/localhost:8080);BufferedReader in = new BufferedReader(new InputStreamReader(web.openStream();String inputLine;while (inputLine = in.readLine() != null)System.out.println(inputLine);in.close();5. 利用URLConnection对URL资源的读取1 编写KY12_3.java 程序文件，源代码如下。import .*; import java.io.*; public class URLConnectionReader public static void main(String args) throws Exception URL web = new URL(http:/localhost:8080); URLConnection webc=web.openConnection(); /get an instance of URLConnection BufferedReader in = new BufferedReader(new InputStreamReader( webc.getInputStream(); /use of URLConnection String inputLine; while (inputLine = in.readLine() != null) System.out.println(inputLine); in.close(); 2 编译并运行6. 掌握URLConnection对URL资源的写入1 编写KY12_4.java 程序文件，源代码如下。import java.io.*;import .*; class Reverse public static void main(String args) throws Exception URL url = new URL(http:/localhost:8080/a/a.jsp);URLConnection connection = url.openConnection();connection.setDoOutput(true);OutputStreamWriter out = new OutputStreamWriter( connection.getOutputStream();out.write(sid=4);out.flush();out.close();BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream();String decodedString;while (decodedString = in.readLine() != null) System.out.println(decodedString);in.close(); 2 编译并运行注意 需要在tomcat安装目录下的webapps目录下建立a目录并放入a.jsp文件。实验报告内容：