C4.5算法实现，自己写的，大家一起讨论下！

public static void main (String args[]){ 
String sRequestUrlString="http://www.sogou.com/web?query=ondblclick 
%3D%22%22"; 
GetMethod getMethod = new GetMethod(sRequestUrlString); 
HttpClient client = new HttpClient(); 
client.setConnectionTimeout(1000 * 60); 
int status=0; 
try { 
status = client.executeMethod(getMethod); 
} catch (HttpException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} catch (IOException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} 
String sResponse=""; 
if(status==HttpStatus.SC_OK) { 
sResponse=(getMethod.getResponseBodyAsString()); 
} else { 


System.out.println("检索失败"); 
} 
getMethod.releaseConnection(); 
String regExData = "找到 ([,\\d]*) 个网页"; 
if(sResponse!=null && sResponse.trim().length()>0) { 
Pattern pattern = Pattern.compile(regExData); 
Matcher matcher = pattern.matcher(sResponse); 
if(matcher.find()) {