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)); }