用java代码实现native2ascii的功能

public static String getAscii(String str) {String tmp;StringBuffer sb = new StringBuffer(1000);char c;int i, j;sb.setLength(0);for (i = 0; i < str.length(); i++) {c = str.charAt(i);if (c > 255) {sb.append("//u");j = (c >>> 8);tmp = Integer.toHexString(j);if (tmp.length() == 1)sb.append("0");sb.append(tmp);j = (c & 0xFF);tmp = Integer.toHexString(j);if (tmp.length() == 1)sb.append("0");sb.append(tmp);} else {sb.append(c);}}return (new String(sb));}