| Код |
public class Test
{
private static final char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
private static final char ASCII_LOWER = 0x20;
private static final char ASCII_UPPER = 0x7F;
public static void main(String[] args) throws Exception
{
System.out.println(convert("новая запись"));
}
public static String convert(String s)
{
int len = s.length();
StringBuilder buffer = new StringBuilder(len);
for(int i = 0; i < len; i++)
{
char c = s.charAt(i);
if(c >= ASCII_LOWER && c <= ASCII_UPPER)
{
buffer.append(c);
}
else
{
appendEscape(c, buffer);
}
}
return buffer.toString();
}
private static void appendEscape(char c, StringBuilder buffer)
{
buffer.append('\\').append('u');
char d0 = HEX_DIGITS[0x000F & c];
c >>>= 4;
char d1 = HEX_DIGITS[0x000F & c];
c >>>= 4;
char d2 = HEX_DIGITS[0x000F & c];
c >>>= 4;
char d3 = HEX_DIGITS[0x000F & c];
buffer.append(d3).append(d2).append(d1).append(d0);
}
}
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