package com.test;import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;public class CharToolsUtil {public static final String Utf8URLencode(String text) {StringBuffer result = new StringBuffer();for (int i = 0; i < text.length(); i++) {char c = text.charAt(i);if (c >= 0 && c <= 255) {result.append(c);}else {//对中文进行转码byte[] b = new byte[0];try {b = Character.toString(c).getBytes("UTF-8");}catch (Exception ex) {}for (int j = 0; j < b.length; j++) {int k = b[j];if (k < 0) k += 256;result.append("%" + Integer.toHexString(k).toUpperCase());}}}return result.toString();}/*** Utf8URL解码* @param text* @return* 单个中文字符被转码为 以%E起始长度为9的字符串*/public static final String Utf8URLdecode(String text) {String result = "";int p = 0;if (text!=null && text.length()>0){text = text.toLowerCase();p = text.indexOf("%e");if (p == -1) return text;while (p != -1) {result += text.substring(0, p);text = text.substring(p, text.length());if (text == "" || text.length() < 9) return result;result += CodeToWord(text.substring(0, 9));text = text.substring(9, text.length());p = text.indexOf("%e");}}return result + text;}/*** utf8URL编码转字符* @param text* @return*/private static final String CodeToWord(String text) {String result;if (Utf8codeCheck(text)) {byte[] code = new byte[3];code[0] = (byte) (Integer.parseInt(text.substring(1, 3), 16) - 256);code[1] = (byte) (Integer.parseInt(text.substring(4, 6), 16) - 256);code[2] = (byte) (Integer.parseInt(text.substring(7, 9), 16) - 256);try {result = new String(code, "UTF-8");}catch (UnsupportedEncodingException ex) {result = null;}}else {result = text;}return result;}/*** 编码是否有效* @param text* @return*/private static final boolean Utf8codeCheck(String text){String sign = "";if (text.startsWith("%e"))for (int i = 0, p = 0; p != -1; i++) {p = text.indexOf("%", p);if (p != -1)p++;sign += p;}return sign.equals("147-1");}/*** 判断是否Utf8Url编码* @param text* @return*/public static final boolean isUtf8Url(String text) {//每个中文汉字会被编码成  以%E开头长度为9的字符串  text = text.toLowerCase();int p = text.indexOf("%");if (p != -1 && text.length() - p > 9) {text = text.substring(p, p + 9);}return Utf8codeCheck(text);}/*** 测试* @param args* @throws UnsupportedEncodingException */@SuppressWarnings("deprecation")public static void main(String[] args) throws UnsupportedEncodingException {//System.out.println(CharTools.Utf8URLencode("我它闷"));String url;String url2 = "https://www.baidu.com/s?wd=语 文 ?&rsv_spt=1&rsv_iqid=0xd13fd9040001fb1d&issp=1&f=8&rsv_bp=0&rsv_idx=2&ie=utf-8&tn=baiduhome_pg&rsv_enter=1&rsv_sug3=2&rsv_sug1=2&rsv_sug7=101&rsv_sug2=0&inputT=774&rsv_sug4=1367  &AAAA=1";url = "http://www.google.com/search?hl=zh-CN&newwindow=1&q=%E4%B8%AD%E5%9B%BD%E5%A4%A7%E7%99%BE%E7%A7%91%E5%9C%A8%E7%BA%BF%E5%85%A8%E6%96%87%E6%A3%80%E7%B4%A2&btnG=%E6%90%9C%E7%B4%A2&lr=";String utf8urLencode = Utf8URLencode("https://www.baidu.com?wd=语文&a=3 % ? :");// String url = "http://www.google.com/search?hl=zh-cn&newwindow=1&q=中国大百科在线全文检索&btng=搜索&lr=";if(CharToolsUtil.isUtf8Url(url2)){String ldecode = CharToolsUtil.Utf8URLdecode(url2);System.out.println(ldecode);String lencode1 = CharToolsUtil.Utf8URLencode(ldecode);String lencode2 = URLEncoder.encode(ldecode,"UTF-8");System.out.println("uft8:"+lencode1+"\nURLEncoder:"+lencode2);//System.out.println(CharTools.Utf8URLdecode(url));}
//          url = "http://www.google.com/search?hl=zh-cn&newwindow=1&q=中国大百科在线全文检索&btng=搜索&lr=";if(!CharToolsUtil.isUtf8Url(url)){System.out.println(CharToolsUtil.Utf8URLencode(url));}}
}