Java 字符串 转HashMap java 字符串 转 unicode

import java.util.ArrayList;

public class Hello {
    public static void main(String[] args) {
        String s = "我爱JAVA";
        System.out.println(s2unicode(s));
    }
    static ArrayList<String> s2unicode(String s) {
        char[] charArr = s.toCharArray();
        ArrayList<String> list = new ArrayList<>();
        for (char c : charArr) {
            String hex = Integer.toHexString(c);
            String str = "0000" + hex;
            list.add("\\u" + str.substring(str.length() - 4));
        }
        return list;
    }

}

输出：