fzw172672421
fzw172672421
2011-11-04 16:58
浏览 280

socket获取web网站数据的方法

通过HttpURLConnection我可以轻松的获取网站数据:
public class NewSocket {

public static String getNetData(String host) throws IOException {

    HttpURLConnection conn = (HttpURLConnection) new URL(host).openConnection();
    InputStream inputStream = conn.getInputStream();
    int len = 1;
    byte[] buffer = new byte[1024];
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    while ((len = inputStream.read(buffer)) != -1) {
        byteArrayOutputStream.write(buffer, 0, len);
    }
    return new String(byteArrayOutputStream.toByteArray());
}

public static void main(String[] args) {
    try {
    System.out.println(NewSocket.getNetData("http://localhost:8080/videoweb"));
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}

但是通过socket的话,我不知道怎么访问web数据。
public class OtherNewSocket {

public static String getNetData(String host, int port) throws IOException {
    Socket socket = new Socket(host, port);
    byte[] buffer = new byte[1024];
    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
    int len = 0;
    while ((len = socket.getInputStream().read(buffer)) != -1) {
        byteArrayOutputStream.write(buffer);
    }
    return new String(byteArrayOutputStream.toByteArray());
}

public static void main(String[] args) {
    try {
        System.out.println(OtherNewSocket.getNetData("localhost", 8080));
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}
求指教,然后我想知道通过url访问和通过socket访问有什么不同点,我理解的就是,通过url访问访问的直接是某个项目网页地址,而通过socket访问呢,则是端对端的访问,也就是访问的其实是目标服务器的某一端口上的进程,但是如果要具体访问进程上的项目,也就是默认欢迎页面index.jsp,又该如何做呢

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4条回答 默认 最新

  • khan7923
    khan7923 2011-11-05 11:24
    已采纳

    你需要看下http协议的底层啊,
    live.html是一个资源路径啊,
    获取别的就写别的了,只是举个例子。
    你可以参看http协议

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  • khan7923
    khan7923 2011-11-04 17:15

    模拟HTTP发送一个get请求即可

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  • khan7923
    khan7923 2011-11-04 17:54

    [code="java"]
    package com.iteye.wenda.socket;

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.PrintWriter;
    import java.net.Socket;
    import java.net.UnknownHostException;

    public class HttpGetWebPage {
    public static void main(String[] args) {
    try {
    Socket socket = new Socket("mdcc.csdn.net", 80);
    BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
    PrintWriter out = new PrintWriter(socket.getOutputStream(),true);
    out.print("GET /live.html HTTP/1.1");
    out.println("/n");

            String rep = "";
            while(null!=(rep = reader.readLine())){
                System.out.println(rep);
            }
    
            out.flush();
            out.close();
            reader.close();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    

    }

    [/code]

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  • khan7923
    khan7923 2011-11-04 17:58

    别忘给分啊,兄弟!

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