急！！ 怎样动态获取网页数据使用控制台输出

Question

java  怎样动态获取网页数据使用控制台输出

Answer 1

网页数据？ 指的是表单数据吗system.out.print(XXXXXX);即在控制台输出

Answer 2

那你的问题是如何根据url获取这个网页上的所有内容了？response应该可以做到

Answer 3

Jdom根据节点获取所有的HTML标签及所有内容，类似于解析XML文件一个原理吧

Answer 4

用apache http components
public final static void main(String[] args) throws Exception {
        
        HttpClient httpclient = new DefaultHttpClient();
        HttpGet httpget = new HttpGet("http://www.google.com/");         System.out.println("executing request " + httpget.getURI());        // Create a response handler
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        String responseBody = httpclient.execute(httpget, responseHandler);
        System.out.println(responseBody);
        
        System.out.println("----------------------------------------");        httpclient.getConnectionManager().shutdown();        
    }

Answer 5

顶6楼，我本来还想说用net包，没先到有更好的！

Answer 6

httpclient.execute(httpget, responseHandler); 这个的时候报错，编译不了是什么原因呢？

Answer 7

HttpClient httpclient = new DefaultHttpClient();
        HttpGet httpget = new HttpGet("http://www.google.com/");         System.out.println("executing request " + httpget.getURI());        // Create a response handler
        ResponseHandler<String> responseHandler = new BasicResponseHandler();
        String responseBody = httpclient.execute(httpget, responseHandler);
        System.out.println(responseBody);
        
        System.out.println("----------------------------------------");        httpclient.getConnectionManager().shutdown(); 

Answer 8

BufferedReader reader = null;
URL url = new URL("url");  
reader = new BufferedReader(new InputStreamReader(url.openConnection().getInputStream(), "utf-8"));
String line = null;
while ((line = reader.readLine()) != null){
System.out.prinltn(line);
}

Answer 9

HttpServletRequest的对象调用getRequestURI()方法获得URL地址
HttpServletRequest的对象调用getQueryString()方法获得查询字符串

Answer 10

public class Filter implements javax.servlet.Filter { public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
System.out.println("过滤");

System.out.println(((HttpServletRequest)arg0).getRequestURI());
System.out.println(((HttpServletRequest)arg0).getQueryString());
System.out.println(((HttpServletRequest)arg0).getRemoteAddr());//取IP
System.out.println(((HttpServletRequest)arg0).getRequestedSessionId());//session ID
// System.out.println(((HttpServletRequest)arg0).getRequestedSessionId().length());//session ID的长度
arg2.doFilter(arg0, arg1); }
}

Answer 11

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.net.HttpURLConnection;
import java.net.URL;public class URLDataRead{
public static void main(String[] args) {
HttpURLConnection conn = null;
try {
            String strUrl = "http://www.google.cn";
            URL url = new URL(strUrl);
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            BufferedReader br = new BufferedReader(new InputStreamReader(conn.
                    getInputStream(), "GBK"));
            String line = null;
            while ((line = br.readLine()) != null) {
                System.out.println(line);
            }
            br.close();
        } catch (Exception ex) {
            ex.printStackTrace(System.out);
        } finally {
            if (conn != null) {
                conn.disconnect();
            }
        }
}
}