综合配置
文本框只能输入数字
onkeyup="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')"
??js(ip)所在地的在线城市
<html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <script type=text/javascript src=http://fw.qq.com/ipaddress></script><script type=text/javascript> document.write("当前ip:"+IPData[0]+",省份："+IPData[2]+",城市:"+IPData[3]);</script></head><body></body> </html> ?java(ip)所在地的在线城市package cheapso.util;import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;public class IpUtil {public static String[] get() {String content = getHtmlReadLine("http://fw.qq.com/ipaddress\n");String del = content.substring(content.indexOf("(")+1, content.indexOf(")"));String [] ipadd = del.replaceAll(""", "").split(",");//ipadd[0]:ip ipadd[2]省份 ipadd[3]城市return ipadd;}public static void main(String[] args) {System.out.println(get()[0]);System.out.println(get()[2]);System.out.println(get()[3]);}public static String getHtmlReadLine(String httpurl){String CurrentLine="";String TotalString="";InputStream urlStream;String content="";try {URL url = new URL(httpurl);HttpURLConnection connection = (HttpURLConnection)url.openConnection();connection.connect();urlStream = connection.getInputStream();BufferedReader reader = new BufferedReader(new InputStreamReader(urlStream,"GBK"));while ((CurrentLine = reader.readLine()) != null) {TotalString += CurrentLine+"\n";}content = TotalString;} catch (Exception e) {e.printStackTrace();}return content;}}?