java 获取url地址返回的数据

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;

public class Url {

public static void main(String[] args) throws Exception {
String url="http://flash.weather.com.cn/wmaps/xml/chengdu.xml";
getData(url);
}

public static String getData(String urlString) throws Exception {
String res = "";
BufferedReader reader = null;
try {
URL url = new URL(urlString);
URLConnection conn = (URLConnection)url.openConnection();
reader = new BufferedReader(new InputStreamReader(conn.getInputStream(),"UTF-8"));
System.out.println("创建url!");
String line;
while ((line = reader.readLine()) != null) {
System.out.println("分别获取每行内容！："+line);
res += line;
}
reader.close();
} catch (Exception e) {
e.getMessage();
}
System.out.println(res);
return res;
}
}