【转】java正则表达式验证整数、浮点数和日期

 /**  
     * 检查日期格式  
     * @param date  
     * @return  
     */  
    public static boolean checkDate(String date) {   
        String eL = "^((\\d{2}(([02468][048])|([13579][26]))[\\-\\/\\s]?((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|

(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][1235679])|([13579][01345789]))[\\-\\/\\s]?

((((0?[13578])|(1[02]))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\\-\\/\\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\\-\\/\\s]?((0?[1-9])|

(1[0-9])|(2[0-8]))))))(\\s(((0?[0-9])|([1][0-9])|([2][0-3]))\\:([0-5]?[0-9])((\\s)|(\\:([0-5]?[0-9])))))?$";   
        Pattern p = Pattern.compile(eL);   
        Matcher m = p.matcher(date);   
        boolean b = m.matches();   
        return b;   
    }   
    /**  
     * 检查整数  
     * @param num  
     * @param type "0+":非负整数 "+":正整数 "-0":非正整数 "-":负整数 "":整数  
     * @return  
     */  
    public static boolean checkNumber(String num,String type){   
        String eL = "";   
        if(type.equals("0+"))eL = "^\\d+$";//非负整数   
        else if(type.equals("+"))eL = "^\\d*[1-9]\\d*$";//正整数   
        else if(type.equals("-0"))eL = "^((-\\d+)|(0+))$";//非正整数   
        else if(type.equals("-"))eL = "^-\\d*[1-9]\\d*$";//负整数   
        else eL = "^-?\\d+$";//整数   
        Pattern p = Pattern.compile(eL);   
        Matcher m = p.matcher(num);   
        boolean b = m.matches();   
        return b;   
    }   
    /**  
     * 检查浮点数  
     * @param num  
     * @param type "0+":非负浮点数 "+":正浮点数 "-0":非正浮点数 "-":负浮点数 "":浮点数  
     * @return  
     */  
    public static boolean checkFloat(String num,String type){   
        String eL = "";   
        if(type.equals("0+"))eL = "^\\d+(\\.\\d+)?$";//非负浮点数   
        else if(type.equals("+"))eL = "^((\\d+\\.\\d*[1-9]\\d*)|(\\d*[1-9]\\d*\\.\\d+)|(\\d*[1-9]\\d*))$";//正浮点数   
        else if(type.equals("-0"))eL = "^((-\\d+(\\.\\d+)?)|(0+(\\.0+)?))$";//非正浮点数   
        else if(type.equals("-"))eL = "^(-((\\d+\\.\\d*[1-9]\\d*)|(\\d*[1-9]\\d*\\.\\d+)|(\\d*[1-9]\\d*)))$";//负浮点数   
        else eL = "^(-?\\d+)(\\.\\d+)?$";//浮点数   
        Pattern p = Pattern.compile(eL);   
        Matcher m = p.matcher(num);   
        boolean b = m.matches();   
        return b;   
    }