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Java 判断中文字符

Java判断一个字符串中是否有中文字符有两种方法,但是原理都一样,就是通过Unicode编码来判断,因为中文在Unicode中的编码区间为:0x4e00--0x9fa5

第一种:

  String chineseStr = "中华人民公社abc";  char[] charArray = chineseStr.toCharArray();  for(int i=0;i<charArray.length;i++){    if ((charArray[i] >= 0x4e00)&&(charArray[i] <= 0x9fa5)){      System.out.println(charArray[i]);    }          }

第二种:

String str = "中国chinese";for (int i = 0; i < str.length(); i++) {    System.out.println(str.substring(i, i + 1).matches("[\\u4e00-\\u9fa5]+"));}

第三种:

public class IsChineseOrEnglish {    // GENERAL_PUNCTUATION 判断中文的“号    // CJK_SYMBOLS_AND_PUNCTUATION 判断中文的。号    // HALFWIDTH_AND_FULLWIDTH_FORMS 判断中文的,号    public static boolean isChinese(char c) {        Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);        if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS                || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS                || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A                || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION                || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION                || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {            return true;        }        return false;    }    public static void isChinese(String strName) {        char[] ch = strName.toCharArray();        for (int i = 0; i < ch.length; i++) {            char c = ch[i];            if (isChinese(c) == true) {                System.out.println(isChinese(c));                return;            } else {                System.out.println(isChinese(c));                return;            }        }    }    public static void main(String[] args) {//        Random r = new Random();//        for (int i = 0; i < 20; i++)//            System.out.println(r.nextInt(10) + 1);        isChinese("き");        isChinese("中国");    }}

 

原文:http://blog.csdn.net/evangel_z/article/details/7625403

 

Java 判断中文字符