java工具软件(java编程自学教程)

大家好,我是中恒。工作中我们经常使用到自定义的开发工具类,本文就列举几个中恒在实际工作中常用的几个工具类,供弟兄们参考。如果本文对您有帮助,欢迎关注、点赞或分享您在工作中经常使用到的工具类。

日期处理

public class DateUtils {    // 日志    private static final Logger logger = Logger.getLogger(DateUtils.class);    /**     * 时间格式(yyyy-MM-dd)     */    public final static String DATE_PATTERN = "yyyy-MM-dd";    /**     * 无分隔符日期格式 "yyyyMMddHHmmssSSS"     */    public static String DATE_TIME_PATTERN_YYYY_MM_DD_HH_MM_SS_SSS = "yyyyMMddHHmmssSSS";    /**     * 时间格式(yyyy-MM-dd HH:mm:ss)     */    public final static String DATE_TIME_PATTERN = "yyyy-MM-dd HH:mm:ss";    private static String[] parsePatterns = {"yyyy-MM-dd", "yyyy-MM-dd HH:mm:ss", "yyyy-MM-dd HH:mm", "yyyy-MM", "yyyy/MM/dd", "yyyy/MM/dd HH:mm:ss", "yyyy/MM/dd HH:mm", "yyyy" +            "/MM", "yyyy.MM.dd", "yyyy.MM.dd HH:mm:ss", "yyyy.MM.dd HH:mm", "yyyy.MM"};    // 日期转换格式数组    public static String[][] regularExp = new String[][]{            // 默认格式            {"\\d{4}-((([0][1,3-9]|[1][0-2]|[1-9])-([0-2]\\d|[3][0,1]|[1-9]))|((02|2)-(([1-9])|[0-2]\\d)))\\s+([0,1]\\d|[2][0-3]|\\d):([0-5]\\d|\\d):([0-5]\\d|\\d)",                    DATE_TIME_PATTERN},            // 仅日期格式 年月日            {"\\d{4}-((([0][1,3-9]|[1][0-2]|[1-9])-([0-2]\\d|[3][0,1]|[1-9]))|((02|2)-(([1-9])|[0-2]\\d)))", DATE_PATTERN},            //  带毫秒格式            {"\\d{4}((([0][1,3-9]|[1][0-2]|[1-9])([0-2]\\d|[3][0,1]|[1-9]))|((02|2)(([1-9])|[0-2]\\d)))([0,1]\\d|[2][0-3])([0-5]\\d|\\d)([0-5]\\d|\\d)\\d{1,3}",                    DATE_TIME_PATTERN_YYYY_MM_DD_HH_MM_SS_SSS}};    public static String format(Date date) {        return format(date, DATE_PATTERN);    }    public static String format(Date date, String pattern) {        if (date != null) {            SimpleDateFormat df = new SimpleDateFormat(pattern);            return df.format(date);        }        return null;    }    public static String timeToStr(Long time, String pattern) {        SimpleDateFormat dateFormat = new SimpleDateFormat(pattern);        if (time.toString().length() < 13) {            time = time * 1000L;        }        Date date = new Date(time);        String value = dateFormat.format(date);        return value;    }    public static long strToTime(String timeStr) {        Date time = strToDate(timeStr);        return time.getTime() / 1000;    }    /**     * 转换为时间类型格式     * @param strDate 日期     * @return     */    public static Date strToDate(String strDate) {        try {            String strType = getDateFormat(strDate);            SimpleDateFormat sf = new SimpleDateFormat(strType);            return new Date((sf.parse(strDate).getTime()));        } catch (Exception e) {            return null;        }    }    /**     * 根据传入的日期格式字符串,获取日期的格式     * @return 秒     */    public static String getDateFormat(String date_str) {        String style = null;        if (StringUtils.isEmpty(date_str)) {            return null;        }        boolean b = false;        for (int i = 0; i < regularExp.length; i++) {            b = date_str.matches(regularExp[i][0]);            if (b) {                style = regularExp[i][1];            }        }        if (StringUtils.isEmpty(style)) {            logger.info("date_str:" + date_str);            logger.info("日期格式获取出错,未识别的日期格式");        }        return style;    }    /**     * 将字符串类型的转换成Date类型     * @param dateStr 字符串类型的日期 yyyy-MM-dd     * @return Date类型的日期     * @throws ParseException     */    public static Date convertStringToDate(String dateStr) {        // 返回的日期        Date resultDate = null;        try {            // 日期格式转换            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");            resultDate = sdf.parse(dateStr);        } catch (ParseException e) {            e.printStackTrace();        }        return resultDate;    }    /**     * 日期型字符串转化为日期 格式     */    public static Date parseDate(Object str) {        if (str == null) {            return null;        }        try {            return org.apache.commons.lang3.time.DateUtils.parseDate(str.toString(), parsePatterns);        } catch (ParseException e) {            return null;        }    }}

Base64加密和解密

public class Base64Utils {    /**     * 加密     * @param str     * @return     */    public static String encode(String str) {        Base64.Encoder encoder = Base64.getEncoder();        byte[] b = str.getBytes(StandardCharsets.UTF_8);        return encoder.encodeToString(b);    }    /**     * 解密     * @param s     * @return     */    public static String decode(String s) {        Base64.Decoder decoder = Base64.getDecoder();        return new String(decoder.decode(s), StandardCharsets.UTF_8);    }}

Bean工具类

public class BeanUtils extends org.springframework.beans.BeanUtils {    /**     * 默认忽略字段<br>     */    private static String[] IGNORE_PROPERTIES = {"createUser", "createTime"};    /**     * 重写copyProperties,NULL值,可以拷贝     * @param source 拷贝元实体     * @param target 拷贝目标实体     * @throws BeansException 抛出异常     */    public static void copyProperties(Object source, Object target, String[] ignoreList) throws BeansException {        Assert.notNull(source, "Source must not be null");        Assert.notNull(target, "Target must not be null");        List<String> ignorePropertyList = new ArrayList<String>();        ignorePropertyList.addAll(Arrays.asList(IGNORE_PROPERTIES));        // 传入的忽略数组非空扩展忽略数组        if (ignoreList != null && ignoreList.length != 0) {            ignorePropertyList.addAll(Arrays.asList(ignoreList));        }        Class<?> actualEditable = target.getClass();        PropertyDescriptor[] targetPds = getPropertyDescriptors(actualEditable);        for (PropertyDescriptor targetPd : targetPds) {            if (targetPd.getWriteMethod() != null) {                PropertyDescriptor sourcePd = getPropertyDescriptor(source.getClass(), targetPd.getName());                if (sourcePd != null && sourcePd.getReadMethod() != null && !ignorePropertyList.contains(targetPd.getName())) {                    try {                        Method readMethod = sourcePd.getReadMethod();                        if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {                            readMethod.setAccessible(true);                        }                        Object value = readMethod.invoke(source);                        // 这里判断value是否为空,过滤Integer类型字段 当然这里也能进行一些特殊要求的处理 例如绑定时格式转换等等                        // if (value != null &&                        // !"java.lang.Integer".equals(readMethod.getReturnType().getName())) {                        // if (value != null && !"".equals(value)) {                        Method writeMethod = targetPd.getWriteMethod();                        if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {                            writeMethod.setAccessible(true);                        }                        writeMethod.invoke(target, value);                        // }                    } catch (Throwable ex) {                        throw new FatalBeanException("Could not copy properties '" + targetPd.getName() + "' from source to target", ex);                    }                }            }        }    }    /**     * 重写copyProperties,忽略NULL值     * @param source     * @param target     * @throws BeansException     */    public static void copyProperties(Object source, Object target) throws BeansException {        Assert.notNull(source, "Source must not be null");        Assert.notNull(target, "Target must not be null");        Class<?> actualEditable = target.getClass();        PropertyDescriptor[] targetPds = getPropertyDescriptors(actualEditable);        for (PropertyDescriptor targetPd : targetPds) {            if (targetPd.getWriteMethod() != null) {                PropertyDescriptor sourcePd = getPropertyDescriptor(source.getClass(), targetPd.getName());                if (sourcePd != null && sourcePd.getReadMethod() != null) {                    try {                        Method readMethod = sourcePd.getReadMethod();                        if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {                            readMethod.setAccessible(true);                        }                        Object value = readMethod.invoke(source);                        // 这里判断value是否为空,过滤Integer类型字段 当然这里也能进行一些特殊要求的处理 例如绑定时格式转换等等                        //                        if (value != null && !"java.lang.Integer".equals(readMethod.getReturnType().getName())) {                        if (value != null && !"".equals(value)) {                            Method writeMethod = targetPd.getWriteMethod();                            if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {                                writeMethod.setAccessible(true);                            }                            writeMethod.invoke(target, value);                        }                    } catch (Throwable ex) {                        throw new FatalBeanException("Could not copy properties '" + targetPd.getName() + "' from source to target", ex);                    }                }            }        }    }    /**     * bean 转为map     * @param obj   bean对象     * @param isAllowNull 空字段是否转换 false 不转换     * @return map值     */    public static Map<String, Object> bean2Map(Object obj, boolean isAllowNull) {        if (obj == null) {            return null;        }        Map<String, Object> map = new HashMap<String, Object>();        try {            BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();            for (PropertyDescriptor property : propertyDescriptors) {                String key = property.getName();                // 过滤class属性                if (!key.equals("class")) {                    // 得到property对应的getter方法                    Method getter = property.getReadMethod();                    Object value = getter.invoke(obj);                    if (isAllowNull || value != null && !value.toString().isEmpty()) {                        map.put(key, value);                    }                }            }        } catch (Exception e) {            System.out.println("transBean2Map Error " + e);        }        return map;    }    /**     * map转bean     * @param targetMap 被转化的map     * @param obj       对象     */    public static void map2Bean(Map<String, Object> targetMap, Object obj) {        Map<String, Object> map = new HashMap<String, Object>();        for (String key : targetMap.keySet()) {            Object value = targetMap.get(key);            map.put(StringUtils.lineToHump(key), value);        }        try {            BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();            for (PropertyDescriptor property : propertyDescriptors) {                String key = property.getName();                if (map.containsKey(key)) {                    try {                        Object value = map.get(key);                        // 得到property对应的setter方法                        Method setter = property.getWriteMethod();                        setter.invoke(obj, value);                    } catch (Exception e) {                        throw new RuntimeException("实体转换错误:" + key);                    }                }            }        } catch (Exception e) {            e.getStackTrace();            throw new RuntimeException("数据转换异常!");        }    }}

cookie处理工具类

public class CookieUtils {    /**     * 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);    }    /**     * 得到Cookie的值,     * @param request     * @param cookieName     * @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;    }    /**     * 得到Cookie的值,     * @param request     * @param cookieName     * @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;    }    /**     * 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     */    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue) {        setCookie(request, response, cookieName, cookieValue, -1);    }    /**     * 设置Cookie的值 在指定时间内生效,但不编码     */    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage) {        setCookie(request, response, cookieName, cookieValue, cookieMaxage, false);    }    /**     * 设置Cookie的值 不设置生效时间,但编码     */    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, boolean isEncode) {        setCookie(request, response, cookieName, cookieValue, -1, isEncode);    }    /**     * 设置Cookie的值 在指定时间内生效, 编码参数     */    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {        doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);    }    /**     * 设置Cookie的值 在指定时间内生效, 编码参数(指定编码)     */    public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName, String cookieValue, int cookieMaxage, String encodeString) {        doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);    }    /**     * 删除Cookie带cookie域名     */    public static void deleteCookie(HttpServletRequest request, HttpServletResponse response, String cookieName) {        doSetCookie(request, response, cookieName, "", -1, false);    }    /**     * 设置Cookie的值,并使其在指定时间内生效     * @param cookieMaxage cookie生效的最大秒数     */    public 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);            }            String domainName = getDomainName(request);            cookie.setDomain(domainName);            cookie.setPath("/");            response.addCookie(cookie);        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * 设置Cookie的值,并使其在指定时间内生效     * @param cookieMaxage cookie生效的最大秒数     */    public 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);                cookie.setDomain(domainName);            }            cookie.setPath("/");            response.addCookie(cookie);        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * 得到cookie的域名     */    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);            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;    }}

ID 生成工具类

public class IdUtils {    /**     * 主要功能:生成流水号 yyyyMMddHHmmssSSS + 3位随机数     * 注意事项:无     * @return 流水号     */    public static String createIdByDate() {        // 精确到毫秒        SimpleDateFormat fmt = new SimpleDateFormat("(yyyyMMddHHmmssSSS)");        String suffix = fmt.format(new Date());        suffix = suffix + "-" + Math.round((Math.random() * 100000));        return suffix;    }    /**     * 主要功能:生成uuid     * 注意事项:无     * @return uuid 32 位     */    public static String createIdbyUUID() {        return UUID.randomUUID().toString().replaceAll("-", "");    }    /**     * 获取随机UUID     * @return 随机UUID     */    public static String randomUUID() {        return UUID.randomUUID().toString();    }    /**     * 简化的UUID,去掉了横线     * @return 简化的UUID,去掉了横线     */    public static String simpleUUID() {        return UUID.randomUUID().toString(true);    }    /**     * 获取随机UUID,使用性能更好的ThreadLocalRandom生成UUID     * @return 随机UUID     */    public static String fastUUID() {        return UUID.fastUUID().toString();    }    /**     * 简化的UUID,去掉了横线,使用性能更好的ThreadLocalRandom生成UUID     * @return 简化的UUID,去掉了横线     */    public static String fastSimpleUUID() {        return UUID.fastUUID().toString(true);    }}

Redis工具类

@Componentpublic class RedisUtils {    private Logger log = LoggerFactory.getLogger(this.getClass());    /**     * 默认编码     */    private static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;    /**     * key序列化     */    private static final StringRedisSerializer STRING_SERIALIZER = new StringRedisSerializer();    /**     * value 序列化     */    private static final JdkSerializationRedisSerializer OBJECT_SERIALIZER = new JdkSerializationRedisSerializer();    /**     * Spring Redis Template     */    private RedisTemplate<String, Object> redisTemplate;    /**     * spring自动调用注入redisTemplate     */    public RedisUtils(RedisTemplate<String, Object> redisTemplate) {        this.redisTemplate = redisTemplate;        //设置序列化器        this.redisTemplate.setKeySerializer(STRING_SERIALIZER);        this.redisTemplate.setValueSerializer(OBJECT_SERIALIZER);        this.redisTemplate.setHashKeySerializer(STRING_SERIALIZER);        this.redisTemplate.setHashValueSerializer(OBJECT_SERIALIZER);    }    /**     * 获取链接工厂     */    public RedisConnectionFactory getConnectionFactory() {        return this.redisTemplate.getConnectionFactory();    }    /**     * 获取 RedisTemplate对象     */    public RedisTemplate<String, Object> getRedisTemplate() {        return redisTemplate;    }    /**     * 清空DB     * @param node redis 节点     */    public void flushDB(RedisClusterNode node) {        this.redisTemplate.opsForCluster().flushDb(node);    }    /**     * 添加到带有 过期时间的  缓存     * @param key   redis主键     * @param value 值     * @param time  过期时间(单位秒)     */    public void setExpire(final byte[] key, final byte[] value, final long time) {        redisTemplate.execute((RedisCallback<Long>) connection -> {            connection.setEx(key, time, value);            log.debug("[redisTemplate redis]放入 缓存  url:{} ========缓存时间为{}秒", key, time);            return 1L;        });    }    /**     * 添加到带有 过期时间的  缓存     * @param key   redis主键     * @param value 值     * @param time  过期时间(单位秒)     */    public void setExpire(final String key, final Object value, final long time) {        redisTemplate.execute((RedisCallback<Long>) connection -> {            RedisSerializer<String> serializer = getRedisSerializer();            byte[] keys = serializer.serialize(key);            byte[] values = OBJECT_SERIALIZER.serialize(value);            connection.setEx(keys, time, values);            return 1L;        });    }    /**     * 一次性添加数组到   过期时间的  缓存,不用多次连接,节省开销     * @param keys   redis主键数组     * @param values 值数组     * @param time   过期时间(单位秒)     */    public void setExpire(final String[] keys, final Object[] values, final long time) {        redisTemplate.execute((RedisCallback<Long>) connection -> {            RedisSerializer<String> serializer = getRedisSerializer();            for (int i = 0; i < keys.length; i++) {                byte[] bKeys = serializer.serialize(keys[i]);                byte[] bValues = OBJECT_SERIALIZER.serialize(values[i]);                connection.setEx(bKeys, time, bValues);            }            return 1L;        });    }    /**     * 一次性添加数组到   过期时间的  缓存,不用多次连接,节省开销     * @param keys   the keys     * @param values the values     */    public void set(final String[] keys, final Object[] values) {        redisTemplate.execute((RedisCallback<Long>) connection -> {            RedisSerializer<String> serializer = getRedisSerializer();            for (int i = 0; i < keys.length; i++) {                byte[] bKeys = serializer.serialize(keys[i]);                byte[] bValues = OBJECT_SERIALIZER.serialize(values[i]);                connection.set(bKeys, bValues);            }            return 1L;        });    }    /**     * 添加到缓存     *     * @param key   the key     * @param value the value     */    public void set(final String key, final Object value) {        redisTemplate.execute((RedisCallback<Long>) connection -> {            RedisSerializer<String> serializer = getRedisSerializer();            byte[] keys = serializer.serialize(key);            byte[] values = OBJECT_SERIALIZER.serialize(value);            connection.set(keys, values);            log.debug("[redisTemplate redis]放入 缓存  url:{}", key);            return 1L;        });    }    /**     * 查询在这个时间段内即将过期的key     * @param key  the key     * @param time the time     * @return the list     */    public List<String> willExpire(final String key, final long time) {        final List<String> keysList = new ArrayList<>();        redisTemplate.execute((RedisCallback<List<String>>) connection -> {            Set<String> keys = redisTemplate.keys(key + "*");            for (String key1 : keys) {                Long ttl = connection.ttl(key1.getBytes(DEFAULT_CHARSET));                if (0 <= ttl && ttl <= 2 * time) {                    keysList.add(key1);                }            }            return keysList;        });        return keysList;    }    /**     * 查询在以keyPatten的所有  key     *     * @param keyPatten the key patten     * @return the set     */    public Set<String> keys(final String keyPatten) {        return redisTemplate.execute((RedisCallback<Set<String>>) connection -> redisTemplate.keys(keyPatten + "*"));    }    /**     * 根据key获取对象     *     * @param key the key     * @return the byte [ ]     */    public byte[] get(final byte[] key) {        byte[] result = redisTemplate.execute((RedisCallback<byte[]>) connection -> connection.get(key));        log.debug("[redisTemplate redis]取出 缓存  url:{} ", key);        return result;    }    /**     * 根据key获取对象     *     * @param key the key     * @return the string     */    public Object get(final String key) {        Object resultStr = redisTemplate.execute((RedisCallback<Object>) connection -> {            RedisSerializer<String> serializer = getRedisSerializer();            byte[] keys = serializer.serialize(key);            byte[] values = connection.get(keys);            return OBJECT_SERIALIZER.deserialize(values);        });        log.debug("[redisTemplate redis]取出 缓存  url:{} ", key);        return resultStr;    }    /**     * 根据key获取对象     * @param keyPatten the key patten     * @return the keys values     */    public Map<String, Object> getKeysValues(final String keyPatten) {        log.debug("[redisTemplate redis]  getValues()  patten={} ", keyPatten);        return redisTemplate.execute((RedisCallback<Map<String, Object>>) connection -> {            RedisSerializer<String> serializer = getRedisSerializer();            Map<String, Object> maps = new HashMap<>(16);            Set<String> keys = redisTemplate.keys(keyPatten + "*");            if (CollectionUtils.isNotEmpty(keys)) {                for (String key : keys) {                    byte[] bKeys = serializer.serialize(key);                    byte[] bValues = connection.get(bKeys);                    Object value = OBJECT_SERIALIZER.deserialize(bValues);                    maps.put(key, value);                }            }            return maps;        });    }    /**     * Ops for hash hash operations.     *     * @return the hash operations     */    public HashOperations<String, String, Object> opsForHash() {        return redisTemplate.opsForHash();    }    /**     * 对HashMap操作     *     * @param key       the key     * @param hashKey   the hash key     * @param hashValue the hash value     */    public void putHashValue(String key, String hashKey, Object hashValue) {        //log.debug("[redisTemplate redis]  putHashValue()  key={},hashKey={},hashValue={} ", key, hashKey, hashValue);        opsForHash().put(key, hashKey, hashValue);    }    /**     * 获取单个field对应的值     *     * @param key     the key     * @param hashKey the hash key     * @return the hash values     */    public Object getHashValues(String key, String hashKey) {        log.debug("[redisTemplate redis]  getHashValues()  key={},hashKey={}", key, hashKey);        return opsForHash().get(key, hashKey);    }    /**     * 根据key值删除     *     * @param key      the key     * @param hashKeys the hash keys     */    public void delHashValues(String key, Object... hashKeys) {        log.debug("[redisTemplate redis]  delHashValues()  key={}", key);        opsForHash().delete(key, hashKeys);    }    /**     * key只匹配map     *     * @param key the key     * @return the hash value     */    public Map<String, Object> getHashValue(String key) {        log.debug("[redisTemplate redis]  getHashValue()  key={}", key);        return opsForHash().entries(key);    }    /**     * 批量添加     *     * @param key the key     * @param map the map     */    public void putHashValues(String key, Map<String, Object> map) {        opsForHash().putAll(key, map);    }    /**     * 集合数量     *     * @return the long     */    public long dbSize() {        return redisTemplate.execute(RedisServerCommands::dbSize);    }    /**     * 清空redis存储的数据     *     * @return the string     */    public String flushDB() {        return redisTemplate.execute((RedisCallback<String>) connection -> {            connection.flushDb();            return "ok";        });    }    /**     * 判断某个主键是否存在     *     * @param key the key     * @return the boolean     */    public boolean exists(final String key) {        return redisTemplate.execute((RedisCallback<Boolean>) connection -> connection.exists(key.getBytes(DEFAULT_CHARSET)));    }    /**     * 删除key     *     * @param keys the keys     * @return the long     */    public long del(final String... keys) {        return redisTemplate.execute((RedisCallback<Long>) connection -> {            long result = 0;            for (String key : keys) {                result = connection.del(key.getBytes(DEFAULT_CHARSET));            }            return result;        });    }    /**     * 获取 RedisSerializer     *     * @return the redis serializer     */    protected RedisSerializer<String> getRedisSerializer() {        return redisTemplate.getStringSerializer();    }    /**     * 对某个主键对应的值加一,value值必须是全数字的字符串     *     * @param key the key     * @return the long     */    public long incr(final String key) {        return redisTemplate.execute((RedisCallback<Long>) connection -> {            RedisSerializer<String> redisSerializer = getRedisSerializer();            return connection.incr(redisSerializer.serialize(key));        });    }    /**     * redis List 引擎     *     * @return the list operations     */    public ListOperations<String, Object> opsForList() {        return redisTemplate.opsForList();    }    /**     * redis List数据结构 : 将一个或多个值 value 插入到列表 key 的表头     *     * @param key   the key     * @param value the value     * @return the long     */    public Long leftPush(String key, Object value) {        return opsForList().leftPush(key, value);    }    /**     * redis List数据结构 : 移除并返回列表 key 的头元素     *     * @param key the key     * @return the string     */    public Object leftPop(String key) {        return opsForList().leftPop(key);    }    /**     * redis List数据结构 :将一个或多个值 value 插入到列表 key 的表尾(最右边)。     *     * @param key   the key     * @param value the value     * @return the long     */    public Long in(String key, Object value) {        return opsForList().rightPush(key, value);    }    /**     * redis List数据结构 : 移除并返回列表 key 的末尾元素     *     * @param key the key     * @return the string     */    public Object rightPop(String key) {        return opsForList().rightPop(key);    }    /**     * redis List数据结构 : 返回列表 key 的长度 ; 如果 key 不存在,则 key 被解释为一个空列表,返回 0 ; 如果 key 不是列表类型,返回一个错误。     *     * @param key the key     * @return the long     */    public Long length(String key) {        return opsForList().size(key);    }    /**     * redis List数据结构 : 根据参数 i 的值,移除列表中与参数 value 相等的元素     *     * @param key   the key     * @param i     the     * @param value the value     */    public void remove(String key, long i, Object value) {        opsForList().remove(key, i, value);    }    /**     * redis List数据结构 : 将列表 key 下标为 index 的元素的值设置为 value     *     * @param key   the key     * @param index the index     * @param value the value     */    public void set(String key, long index, Object value) {        opsForList().set(key, index, value);    }    /**     * redis List数据结构 : 返回列表 key 中指定区间内的元素,区间以偏移量 start 和 end 指定。     *     * @param key   the key     * @param start the start     * @param end   the end     * @return the list     */    public List<Object> getList(String key, int start, int end) {        return opsForList().range(key, start, end);    }    /**     * redis List数据结构 : 批量存储     *     * @param key  the key     * @param list the list     * @return the long     */    public Long leftPushAll(String key, List<String> list) {        return opsForList().leftPushAll(key, list);    }    /**     * redis List数据结构 : 将值 value 插入到列表 key 当中,位于值 index 之前或之后,默认之后。     *     * @param key   the key     * @param index the index     * @param value the value     */    public void insert(String key, long index, Object value) {        opsForList().set(key, index, value);    }}

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