十六进制Unicode编码字符串与中文字符串互转

package tools;

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 = "\u529e\u516c\u6587\u6559";
		String s3 = CodeChange.unicodeToString(aaa);
		System.out.println("s3: " + s3);
	}
}