Question

如何判断一个字符串是否全为汉字

Answer 1

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class test {
public static void main(String[] args) {
int count = 0;
String regEx = "[\\u4e00-\\u9fa5]";
// System.out.println(regEx);
String str = "Internet 网络 is 真好 very good ^_^!";
// System.out.println(str);
Pattern p = Pattern.compile(regEx);
Matcher m = p.matcher(str);
System.out.print("提取出来的中文有：");
while (m.find()) {
System.out.print(m.group(0)+" ");
}
System.out.println();
System.out.println(p.matches(regEx, "中"));
System.out.println(p.matches(regEx, "a"));
}

Answer 2

汉字在Unicode中称作CJK 统一表意符号 (CJK Unified Ideographs)，包括U+3400-U+4DBF/U+4E00-U+9FFF/U+20000-U+3FFFD，参见百度百科【统一码】。