java utf8轉碼

/**

* UTF-8編碼轉換

*/

public String toUtf8String(String s) {

StringBuffer sb = new StringBuffer();

for (int i = 0; i < s.length(); i++) {

char c = s.charAt(i);

if (c >= 0 && c <= 255) {

sb.append(c);

} else {

byte[] b;

try {

b = Character.toString(c).getBytes("utf-8");

} catch (Exception ex) {

b = new byte[0];

}

for (int j = 0; j < b.length; j++) {

int k = b[j];

if (k < 0)

k += 256;

sb.append("%" + Integer.toHexString(k).toUpperCase());

}

}

}

return sb.toString();

}