public class Test {
public static void main(String[] args) {
String str = "你好!";
String unicode = "";
char[] charAry = new char[str.length()];
for (int i = 0; i < charAry.length; i++) {
charAry[i] = (char) str.charAt(i);
unicode += "\\u" + Integer.toHexString(charAry[i]);
}
System.out.println(unicode);
}
}
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