Http URL中文编码解码工具类

从网上获取的 中文转码工具

　　

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+"
URLEncoder:"+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));
		    }
		  }
}