Java_util_02_Java判断字符串是中文还是英文

 1  public static boolean isEnglish(String p) {  
 2   byte[] bytes = p.getBytes();  
 3   int i = bytes.length;//i为字节长度  
 4   int j = p.length();//j为字符长度  
 5   if(i==j){
 6   return true;
 7   }else{
 8   return false;
 9   }
10  }  

 1 package org.liufeng.course.util;
 2 import java.util.regex.Matcher;
 3 import java.util.regex.Pattern;
 4 /**
 5  * Description 提供判断字符串是中文或者是英文的一种思路
 6  * 
 7  */
 8 public class ChineseAndEnglish_Util {
 9     public static void main(String[] args) {
10         String str = "我爱你，！？（）：；“”、。";
11         char[] charArray = str.toCharArray();
12         for (int i = 0; i < charArray.length; i++) {
13             isChinese(charArray[i]);
14         }
15         String chinese = "中国god damn";
16         System.out.println(isContainChinese(chinese));
17         String english = "dfafdabac";
18         System.out.println(isEnglish(english));
19     }
20     
21     /**
22      * 1.判断字节是否是中文
23      * 
24      * CJK的意思是“Chinese，Japanese，Korea”的简写 ，实际上就是指中日韩三国的象形文字的Unicode编码 
25      * Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS             ：4E00-9FBF：CJK 统一表意符号 
26      * Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS       ：F900-FAFF：CJK 兼容象形文字
27      * Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A ：3400-4DBF：CJK 统一表意符号扩展 A 
28      * Character.UnicodeBlock.GENERAL_PUNCTUATION                ：2000-206F：常用标点 
29      * Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION        ：3000-303F：CJK 符号和标点 
30      * Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS      ：FF00-FFEF：半角及全角形式
31      * 
32      */
33     public static boolean isChinese(char c) {
34         Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
35         if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
36                 || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
37                 || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
38                 || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION
39                 || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
40                 || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS) {
41             return true;
42         }
43         return false;
44     }
45     //2.检测是否包含英文
46     public static boolean isEnglish(String charaString) {
47         return charaString.matches("^[a-zA-Z]*");
48     }
49     //3.检测是否包含中文
50     public static boolean isContainChinese(String str) {
51         String regEx = "[\\u4E00-\\u9FA5]+";
52         Pattern p = Pattern.compile(regEx);
53         Matcher m = p.matcher(str);
54         if (m.find()) {
55             return true;
56         } else {
57             return false;
58         }
59     }
60 }