Java如何判定字符串中的中文

public static String splitString(String str, int len) {
        return splitString(str, len, "...");
}

public static String splitString(String str,int len,String elide) {
      if (str == null) {
              return "";
       }
       byte[] strByte = str.getBytes();
       int strLen = strByte.length;
       if (len >= strLen || len < 1) {
              return str;
       }
       int count = 0;
       for (int i = 0; i < len; i++) {
              int value = (int) strByte[i];
              if (value < 0) {
                     count++;
              }
       }
       if (count % 2 != 0) {
              len = (len == 1) ? len + 1 : len - 1;
       }
       return new String(strByte, 0, len) + elide.trim();
}

方法一：                                                    
public static int countChineseCharacter(String originStr) {
int count = 0;                                          
String temp = null;                                     
for (int i = 0; i < originStr.length(); i++) {          
temp = String.valueOf(originStr.charAt(i));           
if (temp.getBytes().length == 2)                      
count++;                                            
}                                                       
return count;                                           
}                                                         
                                                            
方法二：                                                    
public static int countChinese(String originalStr){       
int count = 0;                                          
Pattern pattern = Pattern.compile("[\u4e00-\u9fa5]");   
Matcher matcher = pattern.matcher(originalStr);         
while(matcher.find())                                   
count++;                                              
return count;                                           
}