/**
* 判断字符串是否为数字
*
* 正则表达式判断
*
* @param str 字符串
* @return boolean
*/
public static boolean isNumeric(String str){
Pattern pattern = Pattern.compile("[0-9]*");
Matcher isNum = pattern.matcher(str);
if( !isNum.matches() ){
return false;
}
return true;
}
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