Java 正则表达式解析 Html

 

public void run() {
cache.clear();
parse();
}

private String getWeather(String pattern, String match){
Pattern sp = Pattern.compile(pattern);
Matcher matcher = sp.matcher(match);
while(matcher.find()){
return matcher.group(1);
}
return "";
}

private void parse() {
for(int i=0;i<= citys.length-1;i ){
StringBuffer pageBuffer = new StringBuffer();
try {
URL url = new URL(urlLink citys[i]);
URLConnection ret = url.openConnection();
String input ;

BufferedReader br = new BufferedReader(new InputStreamReader(ret.getInputStream()));
while((input = br.readLine()) != null) {
pageBuffer.append(input);
}
}catch(Exception e){
System.out.println(e.getMessage());
}

StringBuffer weatherBuffer = new StringBuffer();

weatherBuffer.append(getWeather("<td width=\"163\" align=\"center\" valign=\"top\"><span class=\"big-cn\">(.*?)</span>",pageBuffer.toString()));
weatherBuffer.append(getWeather("<td width=\"160\" align=\"center\" valign=\"top\" class=\"weather\">(.*?)</td>",pageBuffer.toString()));
weatherBuffer.append(getWeather("<td width=\"153\" valign=\"top\"><span class=\"big-cn\">(.*?)</span>",pageBuffer.toString()));
weatherBuffer.append(getWeather("class=\"weatheren\">(.*?)</td>",pageBuffer.toString()));

cache.put(citys[i], weatherBuffer.toString());
}
}
}
}

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