unicode字符和String类型相互转换

import java.util.*;
public class unicodetostring
{
public static void main(String[] args)
{

//for(int i= 0;i<args.length;i++)
//{
// String stu = StringToUnicode(args[i]);
// System.out.println(" "+stu+" ");

// }

for(int i= 0;i<args.length;i++)
{
String stu = UnicodeToString(args[i]);
System.out.println(" "+stu+" ");

}
}
/**
* Stringtounicode
*
* @param asString
* @return
*/
public static final String StringToUnicode(String asString) {
char[] ac = asString.toCharArray();
int iValue;
String s = null;
StringBuffer sb = new StringBuffer();
for (int ndx = 0; ndx < ac.length; ndx++) {
iValue = ac[ndx];
if (iValue < 0x10) {
s = "//u000";
} else if (iValue < 0x100) {
s = "//u00";
} else if (iValue < 0x1000) {
s = "//u0";
} else {
s = "//u";
}
sb.append(s + Integer.toHexString(iValue));
}
return sb.toString();
}

/**
* unicodetoString
*
* @param s
* @return
*/
public static final String UnicodeToString(String s) {
if (s==null||"".equalsIgnoreCase(s.trim())) return "";
StringBuffer sb = new StringBuffer();
boolean escape = false;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
switch (c) {
case '//':
case '%':
escape = true;
break;
case 'u':
case 'U':
if (escape) {
try {
sb.append((char) Integer.parseInt(s.substring(i + 1,
i + 5), 16));
escape = false;
} catch (NumberFormatException e) {
throw new IllegalArgumentException();
}
i += 4;
} else {
sb.append(c);
}
break;
default:
sb.append(c);
break;
}
}
return sb.toString();
}
}