import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.net.URLDecoder;
/** * Title:字符编码工具类 * Description: * Copyright: flashman.com.cn Copyright (c) 2005 * Company: flashman.com.cn * @author: jeffzhu * @version 1.0 */ public class CharTools {
/** * 转换编码 ISO-8859-1到GB2312 * @param text * @return */ public String ISO2GB(String text) { String result = ""; try { result = new String(text.getBytes("ISO-8859-1"), "GB2312"); } catch (UnsupportedEncodingException ex) { result = ex.toString(); } return result; }
/** * 转换编码 GB2312到ISO-8859-1 * @param text * @return */ public String GB2ISO(String text) { String result = ""; try { result = new String(text.getBytes("GB2312"), "ISO-8859-1"); } catch (UnsupportedEncodingException ex) { ex.printStackTrace(); } return result; } /** * Utf8URL编码 * @param s * @return */ public 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 {
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 */ public 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 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 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"); }
/** * 是否Utf8Url编码 * @param text * @return */ public boolean isUtf8Url(String text) { 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 */ public static void main(String[] args) {
CharTools charTools = new CharTools();
String url;
url = "%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="; if(charTools.isUtf8Url(url)){ System.out.println(charTools.Utf8URLdecode(url)); }else{ System.out.println(URLDecoder.decode(url)); }
url = "%D6%D0%B9%FA%B4%F3%B0%D9%BF%C6%D4%DA%CF%DF%C8%AB%CE%C4%BC%EC%CB%F7&tn=myie2dg"; if(charTools.isUtf8Url(url)){ System.out.println(charTools.Utf8URLdecode(url)); }else{ System.out.println(URLDecoder.decode(url)); }
}
}
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