java中判断字符串是否包含中文汉字或字符的方法有哪些

String str1 = "T恤;https://blog.csdn.net/vpqtxzmzezeqjj9977";//中文汉字
String str2 = "；https://blog.csdn.net/vpqtxzmzezeqjj9977";//中文分号
String str3 = "https://blog.csdn.net/vpqtxzmzezeqjj9977";//英文
int flage = 0;
for (char c : str2.toCharArray()) {  
         if (c >= 0x4E00 &&  c <= 0x9FA5){
          flage = 1;
          System.out.println("发现中文字符："+c);
             break; //有一个中文字符就返回  
         }
    }
if(flage!=1){
    System.out.println("恭喜，没有发现中文字符！");
}

for (int i = 0; i < str1.length(); i++) {  
   if (str.substring(i, i + 1).matches("[\u4e00-\u9fbb]+")) {  
        flage = 1;
     System.out.println("发现中文字符："+str.substring(i, i + 1));
        break;  //有一个中文字符就返回  
   }  
}  
if(flage!=1){
    System.out.println("恭喜，没有发现中文字符！");
}

// 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  
private static final 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;  
}