中文和unicode互相转换

package unicode;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

 

public class CodeChange {

 

/*

 *  把中文字符串转换为十六进制Unicode编码字符串

 */

 public static String stringToUnicode(String s) {
  String str = "";
  for (int i = 0; i < s.length(); i++) {
   int ch = (int) s.charAt(i);
   if (ch > 255)
    str += "\\u" + Integer.toHexString(ch);
   else
     str += "\\" + Integer.toHexString(ch);
  }
  return str;
 }

 

/*

 *  把十六进制Unicode编码字符串转换为中文字符串

 */

    public static String unicodeToString(String str) {

        Pattern pattern = Pattern.compile("(\\\\u(\\p{XDigit}{4}))");   

        Matcher matcher = pattern.matcher(str);

        char ch;

        while (matcher.find()) {

            ch = (char) Integer.parseInt(matcher.group(2), 16);

            str = str.replace(matcher.group(1), ch + "");   

        }

        return str;

    }

 

 public static void main(String[] args) {
  // 直接以Unicode字符串的方式初始化字符串时，会自动
  String s1 = "配置成功，重启后生效";
  System.out.println("s1: " + s1);
  

  //转换汉字为Unicode码
  String s2 = "配置成功，重启后生效";
  s2 = CodeChange.stringToUnicode(s2);
  System.out.println("s2: " + s2);

  //转换Unicode码为汉字
  String s3 = CodeChange.unicodeToString(s2);
  System.out.println("s3: " + s3);
 }

 

}