java - 在java中检测汉字

Question

Java如何检测String中是否包含汉字？

    String chineseStr = "已下架" ;

if (isChineseString(chineseStr)) {
  System.out.println("The string contains Chinese characters");
}else{
  System.out.println("The string contains Chinese characters");
}

你能帮我解决这个问题吗？

Answer 1

现在 Character.isIdeographic(int codepoint) 会判断代码点是否是 CJKV(中文、日文、韩文和越南文)表意文字。

Nearer 正在使用 Character.UnicodeScript.HAN。

所以:

System.out.println(containsHanScript("xxx已下架xxx"));

public static boolean containsHanScript(String s) {
    for (int i = 0; i < s.length(); ) {
        int codepoint = s.codePointAt(i);
        i += Character.charCount(codepoint);
        if (Character.UnicodeScript.of(codepoint) == Character.UnicodeScript.HAN) {
            return true;
        }
    }
    return false;
}

或者在 java 8 中:

public static boolean containsHanScript(String s) {
    return s.codePoints().anyMatch(
            codepoint ->
            Character.UnicodeScript.of(codepoint) == Character.UnicodeScript.HAN);
}