JavaScript中escape与UNescape怎么在Java中实现共享

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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：

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();}public static String isoToGB(String src) {String strRet = null;try {strRet = new String(src.getBytes("ISO_8859_1"), "GB2312");} catch (Exception e) {}return strRet;}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));}}