StringUtil对字符串类型参数进行校验的工具类

1.对字符串类型参数进行校验的工具类

import java.text.DecimalFormat;import java.util.regex.Matcher;import java.util.regex.Pattern;public class StringUtil {    public static boolean isNull(Object... obj){        return !isNotNull(obj);    }    public static boolean isNotNull(Object... obj){        if(obj != null){            for (Object o : obj) {                if(o == null){                    return false;                }            }        }else{            return false;        }        return true;    }    public static boolean isEmpty(String key) {        return  !isNotEmpty(key);    }    public static boolean isNotEmpty(String key) {        if (key!=null && !"".equals(key.trim())){            return true;        }        return false;    }    public static boolean isNotEmpty(String... keys) {        return  !isEmpty(keys);    }    public static boolean isEmpty(String... keys) {        for (String key : keys) {            if (StringUtil.isEmpty(key)) {                return true;            }        }        return false;    }    public static String decimalFormatPrice(String param) {        if (param == null || "".equals(param)) {            param = "0.00";        }        double tmp = Double.parseDouble(param);        DecimalFormat df = new DecimalFormat("0.00");        return df.format(tmp);    }    public static String cleanXss(String str) {        if (str == null || "".equals(str.trim())) {            return "";        }        str = str.replaceAll(" ", "");        return str;    }    /**    * @param str    * @param trim    * @return    * @description 以*(分号)分隔的字符串，去除首尾的*(分号)。    * @author qinhc    * @createTime 2015上午11:05:00    */    public static String StrRemoveTrim(String str, String trim) {        // str=;2;;        String resultStr = "";        String[] strList = str.split(trim);        for (String s : strList) {            if (!"".equals(s) && null != s) {                resultStr = resultStr + s + trim;            }        }        if (resultStr.length() > 0) {            resultStr = resultStr.substring(0, resultStr.length() - 1);        }        return resultStr;    }    /**    * 是否手机号 简单校验11位数字    *    * @param str    * @return    * @author wangrq1    */    public static boolean isPhone(String str) {        Matcher m = NUM_11.matcher(str);        return m.matches();    }    static Pattern NUM_11 = Pattern.compile("\\d{11}");    /**    * 生产指定长度的由大写字母和数字组成的字符串 add by yezhenyue on 2016-03-29    * @param len    * @return    */    public static String randomStr(int len) {        if (len == 0) {            return "";        }        int a = (int) (Math.random() * 2);        if (a == 0) {            return ((int) (Math.random() * 10)) + randomStr(len - 1);        } else {            return ((char) ((int) (Math.random() * 26) + 65)) + randomStr(len - 1);        }    }    public static void main(String[] args) {        System.out.println(isPhone("18001141691"));        System.out.println(isPhone(""));    }}