java常用简单正则表达式写法

邮箱的判断

 /**
     * 判断email是否合法
     */
    public static boolean checkLoginEmail(String loginStr) {
        String regEx = "^([a-z0-9_A-Z]+[-|\\.]?)+[a-z0-9_A-Z]@([a-z0-9_A-Z]+(-[a-z0-9_A-Z]+)?\\.)+[a-zA-Z_]{2,}$";
        Pattern p = Pattern.compile(regEx);
        Matcher m = p.matcher(loginStr);
        return m.matches();// boolean
    }

简单格式

public static boolean isKaChao(String kachao){  
        Pattern p = Pattern.compile("^(0){5}3[0-9]{4}$");  
        Matcher m = p.matcher(kachao); 
        return m.matches();
        }