urlconnexam.java

Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程序均在JDK1.6环境下编译运行正常,除了第13章需要建立ODBC数据源之外,其他程序只要有Java运行环境即可直接运行

import java.net.*;
import java.io.*;
import java.util.Date;
public class urlConnExam {
  public static void main(String[] args) throws Exception {
    int c;
    try {
      URL url = new URL("http://www.tsinghua.edu.cn");
      URLConnection conn = url.openConnection();
      System.out.println("Date: " + new Date(conn.getDate()));
      System.out.println("Content-Type: " + conn.getContentType());
      System.out.println("Expires: " + conn.getExpiration());
      System.out.println("LastModify:" + new Date(conn.getLastModified()));
      int len = conn.getContentLength();
      System.out.println("Content-Length: " + len);
      if (len > 0) {
        System.out.println("=== content ===");
        InputStream input = conn.getInputStream();
        int i = len;
        while ( (c = input.read()) != -1 && (--i > 0)) {
          System.out.print( (char) c);
        }
      }
      else
        System.out.println("No Content Available!");
    }
    catch (MalformedURLException e) {
      System.out.println("URL错误，请重新输入");
    }
    catch (IOException e) {
      System.out.println("输入信息时发生错误");
    }
  } 
}