java 转 unicode_Java String字符串和Unicode字符相互转换代码详解

将Java String字符串转换为Unicode字符：

public static String stringToUnicode(String str) {
    StringBuilder unicode = new StringBuilder();
    for (int i = 0; i < str.length(); i++) {
        char c = str.charAt(i);
        unicode.append("\\u").append(Integer.toHexString(c));
    }
    return unicode.toString();
}

将Unicode字符转换为Java String字符串：

public static String unicodeToString(String unicode) {
    StringBuilder str = new StringBuilder();
    String[] hex = unicode.split("\\\\u");
    for (int i = 1; i < hex.length; i++) {
        int data = Integer.parseInt(hex[i], 16);
        str.append((char) data);
    }
    return str.toString();
}

使用示例：

String str = "hello world";
String unicode = stringToUnicode(str);
System.out.println("Unicode: " + unicode);
String str2 = unicodeToString(unicode);
System.out.println("String: " + str2);

输出结果：

Unicode: \u0068\u0065\u006c\u006c\u006f\u0020\u0077\u006f\u0072\u006c\u0064
String: hello world