众所周知，JavaScript中escape() 函数可对字符串进行编码，这样就可以在所有的计算机上读取该字符串。下面，我们就来看看 Java语言中类似JavaScript中的escape() 和unescape() 转码方法，具体代码如下：
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public class EscapeUnescape { public static String escape(String src) { int i; char j; StringBuffer tmp = new StringBuffer(); tmp.ensureCapacity(src.length() * 6); for (i = 0; i < src.length(); i++) { j = src.charAt(i); if (Character.isDigit(j) || Character.isLowerCase(j) || Character.isUpperCase(j)) tmp.append(j); else if (j < 256) { tmp.append("%"); if (j < 16) tmp.append("0"); tmp.append(Integer.toString(j, 16)); } else { tmp.append("%u"); tmp.append(Integer.toString(j, 16)); } } return tmp.toString(); } public static String unescape(String src) { StringBuffer tmp = new StringBuffer(); tmp.ensureCapacity(src.length()); int lastPos = 0, pos = 0; char ch; while (lastPos < src.length()) { pos = src.indexOf("%", lastPos); if (pos == lastPos) { if (src.charAt(pos + 1) == 'u') { ch = (char) Integer.parseInt(src .substring(pos + 2, pos + 6), 16); tmp.append(ch); lastPos = pos + 6; } else { ch = (char) Integer.parseInt(src .substring(pos + 1, pos + 3), 16); tmp.append(ch); lastPos = pos + 3; } } else { if (pos == -1) { tmp.append(src.substring(lastPos)); lastPos = src.length(); } else { tmp.append(src.substring(lastPos, pos)); lastPos = pos; } } } return tmp.toString(); } /** * @disc 对字符串重新编码 * @param src * @return */ public static String isoToGB(String src) { String strRet = null; try { strRet = new String(src.getBytes("ISO_8859_1"), "GB2312"); } catch (Exception e) { } return strRet; } /** * @disc 对字符串重新编码 * @param src * @return */ public static String isoToUTF(String src) { String strRet = null; try { strRet = new String(src.getBytes("ISO_8859_1"), "UTF-8"); } catch (Exception e) { } return strRet; } public static void main(String[] args) { String tmp = "中文"; System.out.println("testing escape : " + tmp); tmp = escape(tmp); System.out.println(tmp); System.out.println("testing unescape :" + tmp); System.out.println(unescape("%u6211%u4eec")); System.out.println(isoToUTF(tmp)); }} |
输出结果为：
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testing escape : 中文%u4e2d%u6587testing unescape :%u4e2d%u6587我们%u4e2d%u6587 |
总结
以上就是本文对于Java实现JS中的escape和UNescape代码分享的全部内容，希望对大家有所帮助。
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原文链接：http://blog.csdn.net/hujingn/article/details/5791130
