十六进制Unicode编码字符串与中文字符串互转

package service;

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 aaa ="\u4ec0\u4e48\u662f\u5b89\u5168\u63a7\u4ef6\uff1f###\u5b89\u5168\u63a7\u4ef6\u53ef\u4ee5\u4fdd\u8bc1\u7528\u6237\u7684\u5bc6\u7801\u4e0d\u88ab\u7a83\u53d6\uff0c\u4ece\u800c\u4fdd\u8bc1\u8d44\u91d1\u5b89\u5168";

		String s3 = CodeChange.unicodeToString(aaa);
		System.out.println("s3: " + s3);
	}
}