通用 common 子模块。包括： 自定义响应数据结构 Json操作 MD5 Cookie 操作

一、枚举类型定义

      1、性别：男，女，保密      (目录：com/imooc/enums/Sex.java)

package com.imooc.enums;

public enum  Sex {

    woman(0,"女"),
    man(1,"男"),
    secret(2,"保密");

    public final Integer type;
    public final String value;

    Sex(Integer type,String value) {
       this.type = type;
       this.value = value;
    }

}

     2、是否   （如：是否显示）(目录：com/imooc/enums/YesOrNo.java)

  

package com.imooc.enums;

public enum YesOrNo {

    NO(0,"否"),
    YES(1,"是");

    public final Integer type;
    public final String value;

    YesOrNo(Integer type,String value) {
        this.type = type;
        this.value = value;
    }
}

二、自定义响应数据结构  IMOOCJSONResult  （目录：com/imooc/utils/IMOOCJSONResult.java）

package com.imooc.utils;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 *
 * @Title: IMOOCJSONResult.java
 * @Package com.imooc.utils
 * @Description: 自定义响应数据结构
 *                 本类可提供给 H5/ios/安卓/公众号/小程序 使用
 *                 前端接受此类数据（json object)后，可自行根据业务去实现相关功能
 *
 *                 200：表示成功
 *                 500：表示错误，错误信息在msg字段中
 *                 501：bean验证错误，不管多少个错误都以map形式返回
 *                 502：拦截器拦截到用户token出错
 *                 555：异常抛出信息
 *                 556: 用户qq校验异常
 * @Copyright: Copyright (c) 2020
 * @Company: www.imooc.com
 * @author 慕课网 - 风间影月
 * @version V1.0
 */
public class IMOOCJSONResult {

    // 定义jackson对象
    private static final ObjectMapper MAPPER = new ObjectMapper();

    // 响应业务状态
    private Integer status;

    // 响应消息
    private String msg;

    // 响应中的数据
    private Object data;

    @JsonIgnore
    private String ok;    // 不使用

    public static IMOOCJSONResult build(Integer status, String msg, Object data) {
        return new IMOOCJSONResult(status, msg, data);
    }

    public static IMOOCJSONResult build(Integer status, String msg, Object data, String ok) {
        return new IMOOCJSONResult(status, msg, data, ok);
    }

    public static IMOOCJSONResult ok(Object data) {
        return new IMOOCJSONResult(data);
    }

    public static IMOOCJSONResult ok() {
        return new IMOOCJSONResult(null);
    }

    public static IMOOCJSONResult errorMsg(String msg) {
        return new IMOOCJSONResult(500, msg, null);
    }

    public static IMOOCJSONResult errorMap(Object data) {
        return new IMOOCJSONResult(501, "error", data);
    }

    public static IMOOCJSONResult errorTokenMsg(String msg) {
        return new IMOOCJSONResult(502, msg, null);
    }

    public static IMOOCJSONResult errorException(String msg) {
        return new IMOOCJSONResult(555, msg, null);
    }

    public static IMOOCJSONResult errorUserQQ(String msg) {
        return new IMOOCJSONResult(556, msg, null);
    }

    public IMOOCJSONResult() {

    }

    public IMOOCJSONResult(Integer status, String msg, Object data) {
        this.status = status;
        this.msg = msg;
        this.data = data;
    }

    public IMOOCJSONResult(Integer status, String msg, Object data, String ok) {
        this.status = status;
        this.msg = msg;
        this.data = data;
        this.ok = ok;
    }

    public IMOOCJSONResult(Object data) {
        this.status = 200;
        this.msg = "OK";
        this.data = data;
    }

    public Boolean isOK() {
        return this.status == 200;
    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }

    public String getOk() {
        return ok;
    }

    public void setOk(String ok) {
        this.ok = ok;
    }

}

三、Json操作：对象转换成json字符串，将json结果集转化为对象，json数据转换成pojo对象list

package com.imooc.utils;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.List;

/**
 * 
 * @Title: JsonUtils.java
 * @Package com.imooc.utils
 * @Description: json转换类
 * Copyright: Copyright (c)
 * Company: www.imooc.com
 * 
 * @author imooc
 */
public class JsonUtils {

    // 定义jackson对象
    private static final ObjectMapper MAPPER = new ObjectMapper();

    /**
     * 将对象转换成json字符串。
     * @param data
     * @return
     */
    public static String objectToJson(Object data) {
        try {
            String string = MAPPER.writeValueAsString(data);
            return string;
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
        return null;
    }
    
    /**
     * 将json结果集转化为对象
     * 
     * @param jsonData json数据
     * @param beanType 对象中的object类型
     * @return
     */
    public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {
        try {
            T t = MAPPER.readValue(jsonData, beanType);
            return t;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
    
    /**
     * 将json数据转换成pojo对象list
     * @param jsonData
     * @param beanType
     * @return
     */
    public static <T>List<T> jsonToList(String jsonData, Class<T> beanType) {
        JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);
        try {
            List<T> list = MAPPER.readValue(jsonData, javaType);
            return list;
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return null;
    }
    
}

四、MD5操作

   

package com.imooc.utils;

import org.apache.commons.codec.binary.Base64;

import java.security.MessageDigest;


public class MD5Utils {

    public static String getMD5Str(String strVal) throws Exception {

        MessageDigest md5 = MessageDigest.getInstance("MD5");
        String newStr= Base64.encodeBase64String(md5.digest(strVal.getBytes()));
        return  newStr;
    }

    public  static  void main(String[] args)  {
        try {
            String md5=getMD5Str("imooc");
            System.out.println(md5);

        }catch (Exception e) {
            e.printStackTrace();

        }
    }
}

五、Cookie操作

package com.imooc.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;


/**
 * 
 * @Title: CookieUtils.java
 * @Package com.imooc.utils
 * @Description: Cookie 工具类
 * Copyright: Copyright (c)
 * Company: www.imooc.com
 *
 * @author imooc
 * @version V1.0
 */
public final class CookieUtils {

    final static Logger logger = LoggerFactory.getLogger(CookieUtils.class);
    
    /**
     * 
     * @Description: 得到Cookie的值, 不编码
     * @param request
     * @param cookieName
     * @return
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName) {
        return getCookieValue(request, cookieName, false);
    }
    
    /**
     * 
     * @Description: 得到Cookie的值
     * @param request
     * @param cookieName
     * @param isDecoder
     * @return
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) {
        Cookie[] cookieList = request.getCookies();
        if (cookieList == null || cookieName == null) {
            return null;
        }
        String retValue = null;
        try {
            for (int i = 0; i < cookieList.length; i++) {
                if (cookieList[i].getName().equals(cookieName)) {
                    if (isDecoder) {
                        retValue = URLDecoder.decode(cookieList[i].getValue(), "UTF-8");
                    } else {
                        retValue = cookieList[i].getValue();
                    }
                    break;
                }
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return retValue;
    }

    /**
     * 
     * @Description: 得到Cookie的值
     * @param request
     * @param cookieName
     * @param encodeString
     * @return
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) {
        Cookie[] cookieList = request.getCookies();
        if (cookieList == null || cookieName == null) {
            return null;
        }
        String retValue = null;
        try {
            for (int i = 0; i < cookieList.length; i++) {
                if (cookieList[i].getName().equals(cookieName)) {
                    retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);
                    break;
                }
            }
        } catch (UnsupportedEncodingException e) {
             e.printStackTrace();
        }
        return retValue;
    }

    /**
     * 
     * @Description: 设置Cookie的值 不设置生效时间默认浏览器关闭即失效,也不编码
     * @param request
     * @param response
     * @param cookieName
     * @param cookieValue
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
            String cookieValue) {
        setCookie(request, response, cookieName, cookieValue, -1);
    }

    /**
     * 
     * @Description: 设置Cookie的值 在指定时间内生效,但不编码
     * @param request
     * @param response
     * @param cookieName
     * @param cookieValue
     * @param cookieMaxage
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
            String cookieValue, int cookieMaxage) {
        setCookie(request, response, cookieName, cookieValue, cookieMaxage, false);
    }

    /**
     * 
     * @Description: 设置Cookie的值 不设置生效时间,但编码
     * 在服务器被创建，返回给客户端，并且保存客户端
     * 如果设置了SETMAXAGE(int seconds)，会把cookie保存在客户端的硬盘中
     * 如果没有设置，会默认把cookie保存在浏览器的内存中
     * 一旦设置setPath()：只能通过设置的路径才能获取到当前的cookie信息
     * @param request
     * @param response
     * @param cookieName
     * @param cookieValue
     * @param isEncode
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
            String cookieValue, boolean isEncode) {
        setCookie(request, response, cookieName, cookieValue, -1, isEncode);
    }

   /**
    * 
    * @Description: 设置Cookie的值 在指定时间内生效, 编码参数
    * @param request
    * @param response
    * @param cookieName
    * @param cookieValue
    * @param cookieMaxage
    * @param isEncode
    */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
            String cookieValue, int cookieMaxage, boolean isEncode) {
        doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);
    }

    /**
     * 
     * @Description: 设置Cookie的值 在指定时间内生效, 编码参数(指定编码)
     * @param request
     * @param response
     * @param cookieName
     * @param cookieValue
     * @param cookieMaxage
     * @param encodeString
     */
    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,
            String cookieValue, int cookieMaxage, String encodeString) {
        doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);
    }

    /**
     * 
     * @Description: 删除Cookie带cookie域名
     * @param request
     * @param response
     * @param cookieName
     */
    public static void deleteCookie(HttpServletRequest request, HttpServletResponse response,
            String cookieName) {
        doSetCookie(request, response, cookieName, null, -1, false);
//        doSetCookie(request, response, cookieName, "", -1, false);
    }

    
    /**
     * 
     * @Description: 设置Cookie的值，并使其在指定时间内生效
     * @param request
     * @param response
     * @param cookieName
     * @param cookieValue
     * @param cookieMaxage    cookie生效的最大秒数
     * @param isEncode
     */
    private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,
            String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {
        try {
            if (cookieValue == null) {
                cookieValue = "";
            } else if (isEncode) {
                cookieValue = URLEncoder.encode(cookieValue, "utf-8");
            }
            Cookie cookie = new Cookie(cookieName, cookieValue);
            if (cookieMaxage > 0)
                cookie.setMaxAge(cookieMaxage);
            if (null != request) {// 设置域名的cookie
                String domainName = getDomainName(request);
                logger.info("========== domainName: {} ==========", domainName);
                if (!"localhost".equals(domainName)) {
                    cookie.setDomain(domainName);
                }
            }
            cookie.setPath("/");
            response.addCookie(cookie);
        } catch (Exception e) {
             e.printStackTrace();
        }
    }

    /**
     * 
     * @Description: 设置Cookie的值，并使其在指定时间内生效
     * @param request
     * @param response
     * @param cookieName
     * @param cookieValue
     * @param cookieMaxage    cookie生效的最大秒数
     * @param encodeString
     */
    private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,
            String cookieName, String cookieValue, int cookieMaxage, String encodeString) {
        try {
            if (cookieValue == null) {
                cookieValue = "";
            } else {
                cookieValue = URLEncoder.encode(cookieValue, encodeString);
            }
            Cookie cookie = new Cookie(cookieName, cookieValue);
            if (cookieMaxage > 0)
                cookie.setMaxAge(cookieMaxage);
            if (null != request) {// 设置域名的cookie
                String domainName = getDomainName(request);
                logger.info("========== domainName: {} ==========", domainName);
                if (!"localhost".equals(domainName)) {
                    cookie.setDomain(domainName);
                }
            }
            cookie.setPath("/");
            response.addCookie(cookie);
        } catch (Exception e) {
             e.printStackTrace();
        }
    }

    /**
     * 
     * @Description: 得到cookie的域名
     * @return
     */
    private static final String getDomainName(HttpServletRequest request) {
        String domainName = null;

        String serverName = request.getRequestURL().toString();
        if (serverName == null || serverName.equals("")) {
            domainName = "";
        } else {
            serverName = serverName.toLowerCase();
            serverName = serverName.substring(7);
            final int end = serverName.indexOf("/");
            serverName = serverName.substring(0, end);
            if (serverName.indexOf(":") > 0) {
                String[] ary = serverName.split("\:");
                serverName = ary[0];
            }

            final String[] domains = serverName.split("\.");
            int len = domains.length;
            if (len > 3 && !isIp(serverName)) {
                // www.xxx.com.cn
                domainName = "." + domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];
            } else if (len <= 3 && len > 1) {
                // xxx.com or xxx.cn
                domainName = "." + domains[len - 2] + "." + domains[len - 1];
            } else {
                domainName = serverName;
            }
        }
        return domainName;
    }
    
    public static String trimSpaces(String IP){//去掉IP字符串前后所有的空格  
        while(IP.startsWith(" ")){  
               IP= IP.substring(1,IP.length()).trim();  
            }  
        while(IP.endsWith(" ")){  
               IP= IP.substring(0,IP.length()-1).trim();  
            }  
        return IP;  
    }  
    
    public static boolean isIp(String IP){//判断是否是一个IP  
        boolean b = false;  
        IP = trimSpaces(IP);  
        if(IP.matches("\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}")){  
            String s[] = IP.split("\.");  
            if(Integer.parseInt(s[0])<255)  
                if(Integer.parseInt(s[1])<255)  
                    if(Integer.parseInt(s[2])<255)  
                        if(Integer.parseInt(s[3])<255)  
                            b = true;  
        }  
        return b;  
    }  

}

六、时间日期操作

package com.imooc.utils;

import java.text.*;
import java.util.*;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateUtils;

public class DateUtil {

    /**
     * Base ISO 8601 Date format yyyyMMdd i.e., 20021225 for the 25th day of December in the year 2002
     */
    public static final String ISO_DATE_FORMAT = "yyyyMMdd";

    /**
     * Expanded ISO 8601 Date format yyyy-MM-dd i.e., 2002-12-25 for the 25th day of December in the year 2002
     */
    public static final String ISO_EXPANDED_DATE_FORMAT = "yyyy-MM-dd";

    /**
     * yyyy-MM-dd hh:mm:ss
     */
    public static String DATETIME_PATTERN = "yyyy-MM-dd HH:mm:ss";
    public static String DATE_PATTERN = "yyyyMMddHHmmss";
   
    /**
     * 则个
     */
    private static boolean LENIENT_DATE = false;


    private static Random random = new Random();
    private static final int ID_BYTES = 10;

    public synchronized static String generateId() {
        StringBuffer result = new StringBuffer();
        result = result.append(System.currentTimeMillis());
        for (int i = 0; i < ID_BYTES; i++) {
            result = result.append(random.nextInt(10));
        }
        return result.toString();
    }

    protected static final float normalizedJulian(float JD) {

        float f = Math.round(JD + 0.5f) - 0.5f;

        return f;
    }

    /**
     * Returns the Date from a julian. The Julian date will be converted to noon GMT,
     * such that it matches the nearest half-integer (i.e., a julian date of 1.4 gets
     * changed to 1.5, and 0.9 gets changed to 0.5.)
     *
     * @param JD the Julian date
     * @return the Gregorian date
     */
    public static final Date toDate(float JD) {

        /* To convert a Julian Day Number to a Gregorian date, assume that it is for 0 hours, Greenwich time (so
         * that it ends in 0.5). Do the following calculations, again dropping the fractional part of all
         * multiplicatons and divisions. Note: This method will not give dates accurately on the
         * Gregorian Proleptic Calendar, i.e., the calendar you get by extending the Gregorian
         * calendar backwards to years earlier than 1582. using the Gregorian leap year
         * rules. In particular, the method fails if Y<400. */
        float Z = (normalizedJulian(JD)) + 0.5f;
        float W = (int) ((Z - 1867216.25f) / 36524.25f);
        float X = (int) (W / 4f);
        float A = Z + 1 + W - X;
        float B = A + 1524;
        float C = (int) ((B - 122.1) / 365.25);
        float D = (int) (365.25f * C);
        float E = (int) ((B - D) / 30.6001);
        float F = (int) (30.6001f * E);
        int day = (int) (B - D - F);
        int month = (int) (E - 1);

        if (month > 12) {
            month = month - 12;
        }

        int year = (int) (C - 4715); //(if Month is January or February) or C-4716 (otherwise)

        if (month > 2) {
            year--;
        }

        Calendar c = Calendar.getInstance();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month - 1); // damn 0 offsets
        c.set(Calendar.DATE, day);

        return c.getTime();
    }

    /**
     * Returns the days between two dates. Positive values indicate that
     * the second date is after the first, and negative values indicate, well,
     * the opposite. Relying on specific times is problematic.
     *
     * @param early the "first date"
     * @param late the "second date"
     * @return the days between the two dates
     */
    public static final int daysBetween(Date early, Date late) {

        Calendar c1 = Calendar.getInstance();
        Calendar c2 = Calendar.getInstance();
        c1.setTime(early);
        c2.setTime(late);

        return daysBetween(c1, c2);
    }

    /**
     * Returns the days between two dates. Positive values indicate that
     * the second date is after the first, and negative values indicate, well,
     * the opposite.
     *
     * @param early
     * @param late
     * @return the days between two dates.
     */
    public static final int daysBetween(Calendar early, Calendar late) {

        return (int) (toJulian(late) - toJulian(early));
    }

    /**
     * Return a Julian date based on the input parameter. This is
     * based from calculations found at
     * <a href="http://quasar.as.utexas.edu/BillInfo/JulianDatesG.html">Julian Day Calculations
     * (Gregorian Calendar)</a>, provided by Bill Jeffrys.
     * @param c a calendar instance
     * @return the julian day number
     */
    public static final float toJulian(Calendar c) {

        int Y = c.get(Calendar.YEAR);
        int M = c.get(Calendar.MONTH);
        int D = c.get(Calendar.DATE);
        int A = Y / 100;
        int B = A / 4;
        int C = 2 - A + B;
        float E = (int) (365.25f * (Y + 4716));
        float F = (int) (30.6001f * (M + 1));
        float JD = C + D + E + F - 1524.5f;

        return JD;
    }

    /**
     * Return a Julian date based on the input parameter. This is
     * based from calculations found at
     * <a href="http://quasar.as.utexas.edu/BillInfo/JulianDatesG.html">Julian Day Calculations
     * (Gregorian Calendar)</a>, provided by Bill Jeffrys.
     * @param date
     * @return the julian day number
     */
    public static final float toJulian(Date date) {

        Calendar c = Calendar.getInstance();
        c.setTime(date);

        return toJulian(c);
    }

    /**
     * @param isoString  
     * @param fmt 
     * @param field   Calendar.YEAR/Calendar.MONTH/Calendar.DATE
     * @param amount 
     * @return
     * @throws ParseException
     */
    public static final String dateIncrease(String isoString, String fmt,
                                            int field, int amount) {

        try {
            Calendar cal = GregorianCalendar.getInstance(TimeZone.getTimeZone(
                    "GMT"));
            cal.setTime(stringToDate(isoString, fmt, true));
            cal.add(field, amount);

            return dateToString(cal.getTime(), fmt);

        } catch (Exception ex) {
            return null;
        }
    }

    /**
     * Time Field Rolling function.
     * Rolls (up/down) a single unit of time on the given time field.
     *
     * @param isoString
     * @param field the time field.
     * @param up Indicates if rolling up or rolling down the field value.
     * @param expanded use formating char's
     * @exception ParseException if an unknown field value is given.
     */
    public static final String roll(String isoString, String fmt, int field,
                                    boolean up) throws ParseException {

        Calendar cal = GregorianCalendar.getInstance(TimeZone.getTimeZone(
                "GMT"));
        cal.setTime(stringToDate(isoString, fmt));
        cal.roll(field, up);

        return dateToString(cal.getTime(), fmt);
    }

    /**
     * Time Field Rolling function.
     * Rolls (up/down) a single unit of time on the given time field.
     *
     * @param isoString
     * @param field the time field.
     * @param up Indicates if rolling up or rolling down the field value.
     * @exception ParseException if an unknown field value is given.
     */
    public static final String roll(String isoString, int field, boolean up) throws
            ParseException {

        return roll(isoString, DATETIME_PATTERN, field, up);
    }

    /**
     *  java.util.Date
     * @param dateText  
     * @param format  
     * @param lenient  
     * @return
     */
    public static Date stringToDate(String dateText, String format,
                                    boolean lenient) {

        if (dateText == null) {

            return null;
        }

        DateFormat df = null;

        try {

            if (format == null) {
                df = new SimpleDateFormat();
            } else {
                df = new SimpleDateFormat(format);
            }

            // setLenient avoids allowing dates like 9/32/2001
            // which would otherwise parse to 10/2/2001
            df.setLenient(false);

            return df.parse(dateText);
        } catch (ParseException e) {

            return null;
        }
    }

    /**
     * @return Timestamp
     */
    public static java.sql.Timestamp getCurrentTimestamp() {
        return new java.sql.Timestamp(new Date().getTime());
    }

    /** java.util.Date
     * @param dateText  
     * @param format  
     * @return
     */
    public static Date stringToDate(String dateString, String format) {

        return stringToDate(dateString, format, LENIENT_DATE);
    }

    /**
     * java.util.Date
     * @param dateText  
     */
    public static Date stringToDate(String dateString) {
        return stringToDate(dateString, ISO_EXPANDED_DATE_FORMAT, LENIENT_DATE);
    }

    /**  
     * @return 
     * @param pattern 
     * @param date  
     */
    public static String dateToString(Date date, String pattern) {

        if (date == null) {

            return null;
        }

        try {

            SimpleDateFormat sfDate = new SimpleDateFormat(pattern);
            sfDate.setLenient(false);

            return sfDate.format(date);
        } catch (Exception e) {

            return null;
        }
    }

    /**
     * yyyy-MM-dd
     * @param date
     * @return
     */
    public static String dateToString(Date date) {
        return dateToString(date, ISO_EXPANDED_DATE_FORMAT);
    }

    /**  
     * @return  
     */
    public static Date getCurrentDateTime() {
        Calendar calNow = Calendar.getInstance();
        Date dtNow = calNow.getTime();

        return dtNow;
    }

    /**
     *  
     * @param pattern  
     * @return
     */
    public static String getCurrentDateString(String pattern) {
        return dateToString(getCurrentDateTime(), pattern);
    }

    /**
     *   yyyy-MM-dd
     * @return
     */
    public static String getCurrentDateString() {
        return dateToString(getCurrentDateTime(), ISO_EXPANDED_DATE_FORMAT);
    }

    /**
     * 返回固定格式的当前时间
     *   yyyy-MM-dd hh:mm:ss
     * @param date
     * @return
     */
    public static String dateToStringWithTime( ) {

        return dateToString(new Date(), DATETIME_PATTERN);
    }

    
    /**
     *   yyyy-MM-dd hh:mm:ss
     * @param date
     * @return
     */
    public static String dateToStringWithTime(Date date) {

        return dateToString(date, DATETIME_PATTERN);
    }

    /**
     *  
     * @param date
     * @param days
     * @return java.util.Date
     */
    public static Date dateIncreaseByDay(Date date, int days) {

        Calendar cal = GregorianCalendar.getInstance(TimeZone.getTimeZone(
                "GMT"));
        cal.setTime(date);
        cal.add(Calendar.DATE, days);

        return cal.getTime();
    }

    /**
     *  
     * @param date
     * @param days
     * @return java.util.Date
     */
    public static Date dateIncreaseByMonth(Date date, int mnt) {

        Calendar cal = GregorianCalendar.getInstance(TimeZone.getTimeZone(
                "GMT"));
        cal.setTime(date);
        cal.add(Calendar.MONTH, mnt);

        return cal.getTime();
    }

    /**
     *  
     * @param date
     * @param mnt
     * @return java.util.Date
     */
    public static Date dateIncreaseByYear(Date date, int mnt) {

        Calendar cal = GregorianCalendar.getInstance(TimeZone.getTimeZone(
                "GMT"));
        cal.setTime(date);
        cal.add(Calendar.YEAR, mnt);

        return cal.getTime();
    }

    /**
     *  
     * @param date   yyyy-MM-dd
     * @param days
     * @return  yyyy-MM-dd
     */
    public static String dateIncreaseByDay(String date, int days) {
        return dateIncreaseByDay(date, ISO_DATE_FORMAT, days);
    }

    /**
     * @param date  
     * @param fmt  
     * @param days
     * @return
     */
    public static String dateIncreaseByDay(String date, String fmt, int days) {
        return dateIncrease(date, fmt, Calendar.DATE, days);
    }

    /**
     *  
     * @param src  
     * @param srcfmt  
     * @param desfmt 
     * @return
     */
    public static String stringToString(String src, String srcfmt,
                                        String desfmt) {
        return dateToString(stringToDate(src, srcfmt), desfmt);
    }

    /**
     *  
     * @param date  
     * @return string
     */
    public static String getYear(Date date) {
        SimpleDateFormat formater = new SimpleDateFormat(
                "yyyy");
        String cur_year = formater.format(date);
        return cur_year;
    }

    /**
     *  
     * @param date  
     * @return string
     */
    public static String getMonth(Date date) {
        SimpleDateFormat formater = new SimpleDateFormat(
                "MM");
        String cur_month = formater.format(date);
        return cur_month;
    }

    /**
     * @param date  
     * @return string
     */
    public static String getDay(Date date) {
        SimpleDateFormat formater = new SimpleDateFormat(
                "dd");
        String cur_day = formater.format(date);
        return cur_day;
    }
    
    public static int getDayInt(Date date) {
        SimpleDateFormat formater = new SimpleDateFormat(
                "dd");
        String cur_day = formater.format(date);
        return Integer.valueOf(cur_day);
    }
    
    /**
     * @param date  
     * @return string
     */
    public static String getHour(Date date) {
        SimpleDateFormat formater = new SimpleDateFormat(
                "HH");
        String cur_day = formater.format(date);
        return cur_day;
    }    

    public static int getMinsFromDate(Date dt) {
        GregorianCalendar cal = new GregorianCalendar();
        cal.setTime(dt);
        int hour = cal.get(Calendar.HOUR_OF_DAY);
        int min = cal.get(Calendar.MINUTE);
        return ((hour * 60) + min);
    }

    /**
     * Function to convert String to Date Object. If invalid input then current or next day date
     * is returned (Added by Ali Naqvi on 2006-5-16).
     * @param str String input in YYYY-MM-DD HH:MM[:SS] format.
     * @param isExpiry boolean if set and input string is invalid then next day date is returned
     * @return Date
     */
    public static Date convertToDate(String str, boolean isExpiry) {
        SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm");
        Date dt = null;
        try {
            dt = fmt.parse(str);
        } catch (ParseException ex) {
            Calendar cal = Calendar.getInstance();
            if (isExpiry) {
                cal.add(Calendar.DAY_OF_MONTH, 1);
                cal.set(Calendar.HOUR_OF_DAY, 23);
                cal.set(Calendar.MINUTE, 59);
            } else {
                cal.set(Calendar.HOUR_OF_DAY, 0);
                cal.set(Calendar.MINUTE, 0);
            }
            dt = cal.getTime();
        }
        return dt;
    }

    public static Date convertToDate(String str) {
        SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd hh:mm");
        Date dt = null;
        try {
            dt = fmt.parse(str);
        } catch (ParseException ex) {
            dt = new Date();
        }
        return dt;
    }

    public static String dateFromat(Date date, int minute) {
        String dateFormat = null;
        int year = Integer.parseInt(getYear(date));
        int month = Integer.parseInt(getMonth(date));
        int day = Integer.parseInt(getDay(date));
        int hour = minute / 60;
        int min = minute % 60;
        dateFormat = String.valueOf(year)
                     +
                     (month > 9 ? String.valueOf(month) :
                      "0" + String.valueOf(month))
                     +
                     (day > 9 ? String.valueOf(day) : "0" + String.valueOf(day))
                     + " "
                     +
                     (hour > 9 ? String.valueOf(hour) : "0" + String.valueOf(hour))
                     +
                     (min > 9 ? String.valueOf(min) : "0" + String.valueOf(min))
                     + "00";
        return dateFormat;
    }
    
    public static String sDateFormat() {
        return new SimpleDateFormat(DATE_PATTERN).format(Calendar.getInstance().getTime());    
    }
    
    /**
     * 
     * @Description: 获得本月的第一天日期
     * @return
     * 
     * @author leechenxiang
     * @date 2017年5月31日 下午1:37:34
     */
    public static String getFirstDateOfThisMonth() {
        
        SimpleDateFormat format = new SimpleDateFormat(ISO_EXPANDED_DATE_FORMAT);
        
        Calendar calendarFirst = Calendar.getInstance();
        calendarFirst = Calendar.getInstance();  
        calendarFirst.add(Calendar.MONTH, 0);  
        calendarFirst.set(Calendar.DAY_OF_MONTH, 1);  
        String firstDate = format.format(calendarFirst.getTime()); 
        
        return firstDate;
    }
    
    /**
     * 
     * @Description: 获得本月的最后一天日期
     * @return
     * 
     * @author leechenxiang
     * @date 2017年5月31日 下午1:37:50
     */
    public static String getLastDateOfThisMonth() {
        SimpleDateFormat format = new SimpleDateFormat(ISO_EXPANDED_DATE_FORMAT);  
        
        Calendar calendarLast = Calendar.getInstance();
        calendarLast.setTime(new Date());
        calendarLast.getActualMaximum(Calendar.DAY_OF_MONTH);
        
        String lastDate = format.format(calendarLast.getTime());  
        return lastDate;
    }
    
    /**
     * @Description: 判断字符串日期是否匹配指定的格式化日期
     */
    public static boolean isValidDate(String strDate, String formatter) {
        SimpleDateFormat sdf = null;
        ParsePosition pos = new ParsePosition(0);

        if (StringUtils.isBlank(strDate) || StringUtils.isBlank(formatter)) {
            return false;
        }
        try {
            sdf = new SimpleDateFormat(formatter);
            sdf.setLenient(false);
            Date date = sdf.parse(strDate, pos);
            if (date == null) {
                return false;
            } else {
                if (pos.getIndex() > sdf.format(date).length()) {
                    return false;
                }
                return true;
            }
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }
    
    public static void main(String[] args)
    {
//        String timeDir=DateUtil.dateToString(new Date(),DateUtil.ISO_EXPANDED_DATE_FORMAT);
//        System.out.println(timeDir);
        boolean flag = DateUtil.isValidDate("1990-10-32", DateUtil.ISO_EXPANDED_DATE_FORMAT);
        System.out.println(flag);
    }
    
}