utils基本工具

集合數據轉換工具類：

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;

import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * 轉換集合數據工具類
 */
@Slf4j
public class BeanHelper {

    public static <T> T copyProperties(Object source, Class<T> target){
        try {
            T t = target.newInstance();
            BeanUtils.copyProperties(source, t);
            return t;
        } catch (Exception e) {
            log.error("【數據轉換】數據轉換出錯，目標對象{}構造函數異常", target.getName(), e);
            throw new LyException(ExceptionEnum.DATA_TRANSFER_ERROR);
        }
    }

    public static <T> List<T> copyWithCollection(List<?> sourceList, Class<T> target){
        try {
            return sourceList.stream().map(s -> copyProperties(s, target)).collect(Collectors.toList());
        } catch (Exception e) {
            log.error("【數據轉換】數據轉換出錯，目標對象{}構造函數異常", target.getName(), e);
            throw new LyException(ExceptionEnum.DATA_TRANSFER_ERROR);
        }

    }

    public static <T> Set<T> copyWithCollection(Set<?> sourceList, Class<T> target){
        try {
            return sourceList.stream().map(s -> copyProperties(s, target)).collect(Collectors.toSet());
        } catch (Exception e) {
            log.error("【數據轉換】數據轉換出錯，目標對象{}構造函數異常", target.getName(), e);
            throw new LyException(ExceptionEnum.DATA_TRANSFER_ERROR);
        }
    }
}

Cookie 工具類

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

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;

/**
 * Cookie 工具類
 */
@Slf4j
public final class CookieUtils {

    /**
     * 得到Cookie的值, 不編碼
     *
     * @param request
     * @param cookieName
     * @return
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName) {
        return getCookieValue(request, cookieName, null);
    }

    /**
     * 得到Cookie的值,
     *
     * @param request
     * @param cookieName
     * @return
     */
    public static String getCookieValue(HttpServletRequest request, String cookieName, String charset) {
        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 (charset != null && charset.length() > 0) {
                        retValue = URLDecoder.decode(cookieList[i].getValue(), charset);
                    } else {
                        retValue = cookieList[i].getValue();
                    }
                    break;
                }
            }
        } catch (UnsupportedEncodingException e) {
            log.error("Cookie Decode Error.", e);
        }
        return retValue;
    }

    public static CookieBuilder newCookieBuilder() {
        return new CookieBuilder();
    }

    public static void deleteCookie(String cookieName, String domain,HttpServletResponse response) {
        Cookie cookie = new Cookie(cookieName, "");
        cookie.setMaxAge(0);
        cookie.setPath("/");
        cookie.setDomain(domain);
        response.addCookie(cookie);
    }

    public static class CookieBuilder {
        private HttpServletRequest request;
        private HttpServletResponse response;
        private Integer maxAge;
        private String charset;
        private boolean httpOnly = false;
        private String domain;
        private String path = "/";
        private String name;
        private String value;

        public CookieBuilder() {

        }

        public CookieBuilder request(HttpServletRequest request) {
            this.request = request;
            return this;
        }
        public CookieBuilder response(HttpServletResponse response) {
            this.response = response;
            return this;
        }

        public CookieBuilder maxAge(int maxAge) {
            this.maxAge = maxAge;
            return this;
        }

        public CookieBuilder charset(String charset) {
            this.charset = charset;
            return this;
        }
        public CookieBuilder domain(String domain) {
            this.domain = domain;
            return this;
        }
        public CookieBuilder path(String path) {
            this.path = path;
            return this;
        }
        public CookieBuilder value(String value) {
            this.value = value;
            return this;
        }
        public CookieBuilder name(String name) {
            this.name = name;
            return this;
        }

        public CookieBuilder httpOnly(boolean httpOnly) {
            this.httpOnly = httpOnly;
            return this;
        }

        public void build() {
            try {
                if (StringUtils.isBlank(charset)) {
                    charset = "utf-8";
                }
                if(StringUtils.isBlank(name)||StringUtils.isBlank(value)){
                    throw new RuntimeException("cookie名稱和值不能爲空！");
                }
                if (StringUtils.isNotBlank(charset)) {
                    value = URLEncoder.encode(value, charset);
                }
                Cookie cookie = new Cookie(name, value);
                if (maxAge != null && maxAge >= 0)
                    cookie.setMaxAge(maxAge);

                if(StringUtils.isNotBlank(domain)){
                    cookie.setDomain(domain);
                }else if (null != request) {
                    // 設置域名的cookie
                    cookie.setDomain(getDomainName(request));
                }
                // 設置path
                cookie.setPath("/");
                if(StringUtils.isNotBlank(path)){
                    cookie.setPath(path);
                }
                cookie.setHttpOnly(httpOnly);
                response.addCookie(cookie);
            } catch (Exception e) {
                log.error("Cookie Encode Error.", e);
            }
        }

        /**
         * 得到cookie的域名
         */
        private 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);
                final String[] domains = serverName.split("\\.");
                int len = domains.length;
                if (len > 3) {
                    // 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;
                }
            }

            if (domainName != null && domainName.indexOf(":") > 0) {
                String[] ary = domainName.split("\\:");
                domainName = ary[0];
            }
            return domainName;
        }
    }
}

分佈式ID

import java.lang.management.ManagementFactory;
import java.net.InetAddress;
import java.net.NetworkInterface;

/**
 * <p>名稱：IdWorker.java</p>
 * <p>描述：分佈式自增長ID</p>
 * <pre>
 *     Twitter的 Snowflake　JAVA實現方案
 * </pre>
 * 核心代碼爲其IdWorker這個類實現，其原理結構如下，我分別用一個0表示一位，用—分割開部分的作用：
 * 1||0---0000000000 0000000000 0000000000 0000000000 0 --- 00000 ---00000 ---000000000000
 * 在上面的字符串中，第一位爲未使用（實際上也可作爲long的符號位），接下來的41位爲毫秒級時間，
 * 然後5位datacenter標識位，5位機器ID（並不算標識符，實際是爲線程標識），
 * 然後12位該毫秒內的當前毫秒內的計數，加起來剛好64位，爲一個Long型。
 * 這樣的好處是，整體上按照時間自增排序，並且整個分佈式系統內不會產生ID碰撞（由datacenter和機器ID作區分），
 * 並且效率較高，經測試，snowflake每秒能夠產生26萬ID左右，完全滿足需要。
 * <p>
 * 64位ID (42(毫秒)+5(機器ID)+5(業務編碼)+12(重複累加))
 *
 */
public class IdWorker {
    // 時間起始標記點，作爲基準，一般取系統的最近時間（一旦確定不能變動）
    private final static long twepoch = 1288834974657L;
    // 機器標識位數
    private final static long workerIdBits = 5L;
    // 數據中心標識位數
    private final static long datacenterIdBits = 5L;
    // 機器ID最大值
    private final static long maxWorkerId = -1L ^ (-1L << workerIdBits);
    // 數據中心ID最大值
    private final static long maxDatacenterId = -1L ^ (-1L << datacenterIdBits);
    // 毫秒內自增位
    private final static long sequenceBits = 12L;
    // 機器ID偏左移12位
    private final static long workerIdShift = sequenceBits;
    // 數據中心ID左移17位
    private final static long datacenterIdShift = sequenceBits + workerIdBits;
    // 時間毫秒左移22位
    private final static long timestampLeftShift = sequenceBits + workerIdBits + datacenterIdBits;

    private final static long sequenceMask = -1L ^ (-1L << sequenceBits);
    /* 上次生產id時間戳 */
    private static long lastTimestamp = -1L;
    // 0，併發控制
    private long sequence = 0L;

    private final long workerId;
    // 數據標識id部分
    private final long datacenterId;

    public IdWorker(){
        this.datacenterId = getDatacenterId(maxDatacenterId);
        this.workerId = getMaxWorkerId(datacenterId, maxWorkerId);
    }
    /**
     * @param workerId
     *            工作機器ID
     * @param datacenterId
     *            序列號
     */
    public IdWorker(long workerId, long datacenterId) {
        if (workerId > maxWorkerId || workerId < 0) {
            throw new IllegalArgumentException(String.format("worker Id can't be greater than %d or less than 0", maxWorkerId));
        }
        if (datacenterId > maxDatacenterId || datacenterId < 0) {
            throw new IllegalArgumentException(String.format("datacenter Id can't be greater than %d or less than 0", maxDatacenterId));
        }
        this.workerId = workerId;
        this.datacenterId = datacenterId;
    }
    /**
     * 獲取下一個ID
     *
     * @return
     */
    public synchronized long nextId() {
        long timestamp = timeGen();
        if (timestamp < lastTimestamp) {
            throw new RuntimeException(String.format("Clock moved backwards.  Refusing to generate id for %d milliseconds", lastTimestamp - timestamp));
        }

        if (lastTimestamp == timestamp) {
            // 當前毫秒內，則+1
            sequence = (sequence + 1) & sequenceMask;
            if (sequence == 0) {
                // 當前毫秒內計數滿了，則等待下一秒
                timestamp = tilNextMillis(lastTimestamp);
            }
        } else {
            sequence = 0L;
        }
        lastTimestamp = timestamp;
        // ID偏移組合生成最終的ID，並返回ID
        long nextId = ((timestamp - twepoch) << timestampLeftShift)
                | (datacenterId << datacenterIdShift)
                | (workerId << workerIdShift) | sequence;

        return nextId;
    }

    private long tilNextMillis(final long lastTimestamp) {
        long timestamp = this.timeGen();
        while (timestamp <= lastTimestamp) {
            timestamp = this.timeGen();
        }
        return timestamp;
    }

    private long timeGen() {
        return System.currentTimeMillis();
    }

    /**
     * <p>
     * 獲取 maxWorkerId
     * </p>
     */
    protected static long getMaxWorkerId(long datacenterId, long maxWorkerId) {
        StringBuffer mpid = new StringBuffer();
        mpid.append(datacenterId);
        String name = ManagementFactory.getRuntimeMXBean().getName();
        if (!name.isEmpty()) {
         /*
          * GET jvmPid
          */
            mpid.append(name.split("@")[0]);
        }
      /*
       * MAC + PID 的 hashcode 獲取16個低位
       */
        return (mpid.toString().hashCode() & 0xffff) % (maxWorkerId + 1);
    }

    /**
     * <p>
     * 數據標識id部分
     * </p>
     */
    protected static long getDatacenterId(long maxDatacenterId) {
        long id = 0L;
        try {
            InetAddress ip = InetAddress.getLocalHost();
            NetworkInterface network = NetworkInterface.getByInetAddress(ip);
            if (network == null) {
                id = 1L;
            } else {
                byte[] mac = network.getHardwareAddress();
                id = ((0x000000FF & (long) mac[mac.length - 1])
                        | (0x0000FF00 & (((long) mac[mac.length - 2]) << 8))) >> 6;
                id = id % (maxDatacenterId + 1);
            }
        } catch (Exception e) {
            System.out.println(" getDatacenterId: " + e.getMessage());
        }
        return id;
    }


}

不同數據的類型轉換：

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.List;
import java.util.Map;

/**
 * 不同類型轉換
 **/
public class JsonUtils {

    public static final ObjectMapper mapper = new ObjectMapper();

    private static final Logger logger = LoggerFactory.getLogger(JsonUtils.class);


    public static String toString(Object obj) {
        if (obj == null) {
            return null;
        }
        if (obj.getClass() == String.class) {
            return (String) obj;
        }
        try {
            return mapper.writeValueAsString(obj);
        } catch (JsonProcessingException e) {
            logger.error("json序列化出錯：" + obj, e);
            return null;
        }
    }

    public static <T> T toBean(String json, Class<T> tClass) {
        try {
            return mapper.readValue(json, tClass);
        } catch (IOException e) {
            logger.error("json解析出錯：" + json, e);
            return null;
        }
    }

    // 將字符串轉換成List
    public static <E> List<E> toList(String json, Class<E> eClass) {
        try {
            return mapper.readValue(json, mapper.getTypeFactory().constructCollectionType(List.class, eClass));
        } catch (IOException e) {
            logger.error("json解析出錯：" + json, e);
            return null;
        }
    }

    // 將字符串轉換成Map
    public static <K, V> Map<K, V> toMap(String json, Class<K> kClass, Class<V> vClass) {
        try {
            return mapper.readValue(json, mapper.getTypeFactory().constructMapType(Map.class, kClass, vClass));
        } catch (IOException e) {
            logger.error("json解析出錯：" + json, e);
            return null;
        }
    }

    // 將字符串轉換成集合類型
    public static <T> T nativeRead(String json, TypeReference<T> type) {
        try {
            return mapper.readValue(json, type);
        } catch (IOException e) {
            logger.error("json解析出錯：" + json, e);
            return null;
        }
    }
}

基本正則表達式：

/**
 *
 */
public abstract class RegexPatterns {
    /**
     * 手機號正則
     */
    public static final String PHONE_REGEX = "^1([38][0-9]|4[579]|5[0-3,5-9]|6[6]|7[0135678]|9[89])\\d{8}$";
    /**
     * 郵箱正則
     */
    public static final String EMAIL_REGEX = "^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\\.[a-zA-Z0-9_-]+)+$";
    /**
     * 用戶名正則
     */
    public static final String USERNAME_REGEX = "^\\w{4,32}$";

}

手機號碼的格式判斷：

package com.leyou.common.utils;

import org.apache.commons.lang3.StringUtils;

/**
 *
 */
public class RegexUtils {
    /**
     * 是否符合手機格式
     * @param phone 要校驗的手機號
     * @return true:符合，false：不符合
     */
    public static boolean isPhone(String phone){
        return matches(phone, RegexPatterns.PHONE_REGEX);
    }
    /**
     * 是否符合郵箱格式
     * @param email 要校驗的郵箱
     * @return true:符合，false：不符合
     */
    public static boolean isEmail(String email){
        return matches(email, RegexPatterns.EMAIL_REGEX);
    }

    private static boolean matches(String str, String regex){
        if (StringUtils.isBlank(str)) {
            return false;
        }
        return str.matches(regex);
    }
}