学步园

package com.path.test;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.net.URL;
import java.net.URLConnection;

public class TURLConnection {
public static void main(String args[]) throws Exception
{

//设置代理上外网
System.getProperties().put("proxySet", "true");
System.getProperties().put("proxyHost", "172.31.170.14");
System.getProperties().put("proxyPort", "8080");

/*

如果需要验证用户

//Authenticator.setDefault(new MyAuthenticator());

*/
URL url=new URL("http://www.csdn.net");
URLConnection urlCon=url.openConnection();

/*
* 方法1,一次过读取所有信息
*/
BufferedInputStream bis=new BufferedInputStream(urlCon.getInputStream());
BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream("C:aa.htm"));

byte b[]=new byte[bis.available()];
bis.read(b);
bos.write(b);
bos.flush();

bis.close();
bos.close();


/*
* 方法2,一个个字节地读取
*/
// InputStream is=urlCon.getInputStream();
// FileOutputStream fos=new FileOutputStream("C:bb.htm");
// int tmp=0;
// while((tmp=is.read())!=-1)
// {
// fos.write(tmp);
// }
// fos.flush();
// fos.close();
// is.close();
}
}

 

import java.net.Authenticator;
import java.net.PasswordAuthentication;

public class MyAuthenticator extends Authenticator {

private String name ;
private String password;

public MyAuthenticator() {
super();
// TODO Auto-generated constructor stub
}


public MyAuthenticator(String name, String password) {
super();
// TODO Auto-generated constructor stub
this.name = name;
this.password = password;
}


public String getName() {
return name;
}


public void setName(String name) {
this.name = name;
}


public String getPassword() {
return password;
}


public void setPassword(String password) {
this.password = password;
}


protected PasswordAuthentication getPasswordAuthentication() {

return new PasswordAuthentication(this.getName(),this.getPassword().toCharArray());

}

}