JAVA 获取网页源代码保存到本地文件详解编程语言

package httpget; 
import java.io.BufferedReader; 
import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.net.HttpURLConnection; 
import java.net.URL; 
 
public class demo { 
    private String u; 
    private String encoding; 
 
    public static void main(String[] args) throws Exception { 
    	String url = "http://www.baidu.com/"; 
        demo client = new demo(url, "gb2312"); 
        client.run(); 
    } 
 
    public demo(String u, String encoding) { 
        this.u = u; 
        this.encoding = encoding; 
    } 
 
    public void run() throws Exception { 
    	 
    	File fp = new File("E://zc//test.txt"); 
        URL url = new URL(u); 
        // 根据链接（字符串格式），生成一个URL对象 
        HttpURLConnection urlConnection = (HttpURLConnection) url 
                .openConnection();// 打开URL 
        BufferedReader reader = new BufferedReader(new InputStreamReader( 
                urlConnection.getInputStream(), encoding)); 
        // 得到输入流，即获得了网页的内容 
        String line; 
        while ((line = reader.readLine())!= null)  
        { 
        	addfile(line,fp); 
        } 
         
    } 
 
    public void addfile(String line,File fp) throws IOException //追加文件 
    { 
    	try { 
    		String str = "/r/n"; 
			FileOutputStream af = new FileOutputStream(fp,true); 
			af.write(line.getBytes()); 
			af.write(str.getBytes()); 
			 
		} catch (FileNotFoundException e)  
    	{ 
			// TODO Auto-generated catch block 
			System.out.println("写入失败!"); 
			e.printStackTrace(); 
		} 
    } 
     
}