httpclient4.java

《java网络编程精解》的源代码

/** 演示如何处理响应正文，参见6.3.3节*/
import java.net.*;
import java.io.*;
public class HttpClient4{
  public static void main(String args[])throws IOException{
    URL url=new URL("http://www.javathinker.org/hello.htm");
    URLConnection connection=url.openConnection();
    //接收响应结果
    InputStream in=connection.getInputStream(); //读取响应正文
    Class[] types={String.class,InputStream.class};
    Object obj=connection.getContent(types);
    if(obj instanceof String){
      System.out.println(obj);
    }else if(obj instanceof InputStream){
      in=(InputStream)obj;
      FileOutputStream file=new FileOutputStream("data");
      byte[] buff=new byte[1024];  
      int len=-1;

      while((len=in.read(buff))!=-1){
        file.write(buff,0,len);
      }
     
      System.out.println("正文保存完毕");    
    }else{
      System.out.println("未知的响应正文类型");
    }
  } 
}


/****************************************************
 * 作者：孙卫琴                                     *
 * 来源：<<Java网络编程精解>>                       *
 * 技术支持网址：www.javathinker.org                *
 ***************************************************/