在java中检测汉字 [英] Detect Chinese character in java

问题描述

使用Java如何检测字符串是否包含汉字？

Using Java how to detect if a String contains Chinese characters?

    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");
}

你能帮我解决问题吗？

推荐答案

现在 Character.isIdeographic（int codepoint）会告诉我们，代码点是CJKV ，日语，韩语和越南语）表意文字。

Now Character.isIdeographic(int codepoint) would tell wether the codepoint is a CJKV (Chinese, Japanese, Korean and Vietnamese) ideograph.

更接近使用Character.UnicodeScript.HAN。

Nearer is using 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;
}

或在java 8中：

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

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