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网站备案查询 站长,哈尔滨工程研究生招生信息网,可以将自己做的衣服展示的网站,天津高级网站建设Hutool工具库实战一、引言#xff1a;为什么选择Hutool#xff1f; 在Java开发中#xff0c;我们经常需要处理各种繁琐的操作#xff1a; 日期格式化#xff1a;SimpleDateFormat线程不安全#xff0c;代码冗长字符串处理#xff1a;判空、分割、格式化需要大量判断类型…Hutool工具库实战一、引言为什么选择Hutool在Java开发中我们经常需要处理各种繁琐的操作日期格式化SimpleDateFormat线程不安全代码冗长字符串处理判空、分割、格式化需要大量判断类型转换各种类型间转换缺少统一API文件操作原生API复杂异常处理麻烦Hutool是一个Java工具包它帮助我们简化每一行代码减少每一个方法让Java语言也可以甜甜的。Hutool中的工具方法来自每个用户的精雕细琢经过上千项目的实际验证。Hutool的核心优势✅全面涵盖日期、字符串、IO、加密、线程等全方位工具✅简洁一行代码完成复杂操作✅可靠经过数千项目验证稳定可靠✅无侵入无任何第三方依赖轻量级本文将深入介绍Hutool中最常用的8大核心工具类通过真实案例展示它们在生产环境中的应用。二、DateUtil日期时间处理利器2.1 日期解析与格式化基础用法importcn.hutool.core.date.DateUtil;importjava.util.Date;// 字符串转Date - 自动识别常见格式Datedate1DateUtil.parse(2024-01-15);Datedate2DateUtil.parse(2024-01-15 10:30:45);Datedate3DateUtil.parse(2024/01/15);// 自动识别// 格式化Date为字符串StringdateStrDateUtil.format(newDate(),yyyy-MM-dd HH:mm:ss);// 2024-01-15 10:30:45// 格式化为常用格式StringtodayDateUtil.today();// 2024-01-15StringnowDateUtil.now();// 2024-01-15 10:30:45生产案例订单时间处理publicclassOrderService{// 创建订单时记录时间publicOrdercreateOrder(OrderDTOdto){OrderordernewOrder();order.setOrderNo(generateOrderNo());order.setCreateTime(DateUtil.now());// 当前时间字符串order.setPayDeadline(DateUtil.offsetHour(newDate(),2));// 2小时后returnorderRepository.save(order);}// 查询指定日期的订单publicListOrderfindOrdersByDate(StringdateStr){DatedateDateUtil.parseDate(dateStr);// 解析日期DatebeginOfDayDateUtil.beginOfDay(date);// 当天开始时间DateendOfDayDateUtil.endOfDay(date);// 当天结束时间returnorderRepository.findByCreateTimeBetween(beginOfDay,endOfDay);}}2.2 日期计算与偏移// 日期偏移DatenownewDate();DatetomorrowDateUtil.tomorrow();// 明天DateyesterdayDateUtil.yesterday();// 昨天DatenextWeekDateUtil.offsetWeek(now,1);// 下周DatenextMonthDateUtil.offsetMonth(now,1);// 下个月DateoneHourLaterDateUtil.offsetHour(now,1);// 1小时后// 计算时间差longbetweenDayDateUtil.between(start,end,DateUnit.DAY);// 相差天数longbetweenHourDateUtil.between(start,end,DateUnit.HOUR);// 相差小时longbetweenMinuteDateUtil.between(start,end,DateUnit.MINUTE);// 相差分钟生产案例会员到期提醒publicclassMembershipService{// 检查会员是否即将过期7天内publicbooleanisExpiringSoon(Membermember){DateexpireDatemember.getExpireDate();DatenownewDate();// 计算剩余天数longremainDaysDateUtil.between(now,expireDate,DateUnit.DAY);returnremainDays0remainDays7;}// 续费会员publicvoidrenewMembership(LongmemberId,intmonths){MembermembermemberRepository.findById(memberId);DatecurrentExpiremember.getExpireDate();// 如果已过期从今天开始计算DatebaseDateDateUtil.compare(currentExpire,newDate())0?currentExpire:newDate();// 延长指定月份DatenewExpireDateDateUtil.offsetMonth(baseDate,months);member.setExpireDate(newExpireDate);memberRepository.save(member);}}2.3 时间判断// 判断是否为今天booleanisTodayDateUtil.isToday(date);// 判断是否为周末booleanisWeekendDateUtil.isWeekend(newDate());// 判断是否在指定范围内booleanisInDateUtil.isIn(checkDate,startDate,endDate);// 获取星期几StringweekDateUtil.dayOfWeekEnum(newDate()).toChinese();// 星期一// 获取月份天数intdaysDateUtil.lengthOfMonth(1,2024);// 29天2024年是闰年生产案例定时任务调度ComponentpublicclassScheduledTasks{// 工作日提醒Scheduled(cron0 9 0 * * ?)publicvoidworkdayReminder(){if(!DateUtil.isWeekend(newDate())){// 发送工作日提醒notificationService.sendWorkdayReminder();}}// 月末统计Scheduled(cron0 0 23 * * ?)publicvoidmonthEndStatistics(){DatetodaynewDate();DatetomorrowDateUtil.tomorrow();// 判断明天是否为下个月if(DateUtil.month(today)!DateUtil.month(tomorrow)){// 执行月末统计statisticsService.monthEndReport();}}}三、StrUtil字符串操作神器3.1 字符串判空与处理importcn.hutool.core.util.StrUtil;// 判空比StringUtils更强大booleanisEmptyStrUtil.isEmpty(str);// null或空串booleanisBlankStrUtil.isBlank(str);// null、空串或空白booleanisNotEmptyStrUtil.isNotEmpty(str);booleanisNotBlankStrUtil.isNotBlank(str);// 去除空白StringtrimmedStrUtil.trim(str);// 去除首尾空白StringtrimStartStrUtil.trimStart(str);// 去除开头空白StringtrimEndStrUtil.trimEnd(str);// 去除结尾空白// 字符串为空时返回默认值StringresultStrUtil.emptyToDefault(str,默认值);Stringresult2StrUtil.blankToDefault(str,默认值);生产案例用户输入校验publicclassUserValidator{publicvoidvalidateUser(UserDTOdto){// 校验用户名if(StrUtil.isBlank(dto.getUsername())){thrownewValidationException(用户名不能为空);}// 校验并清理输入StringusernameStrUtil.trim(dto.getUsername());StringemailStrUtil.trimToEmpty(dto.getEmail());// 设置默认昵称StringnicknameStrUtil.blankToDefault(dto.getNickname(),username);dto.setUsername(username);dto.setEmail(email);dto.setNickname(nickname);}}3.2 字符串分割与拼接// 分割字符串ListStringlistStrUtil.split(a,b,c,,);// [a, b, c]String[]arrayStrUtil.splitToArray(a-b-c,-);// [a, b, c]// 分割并去除空白ListStringcleanedStrUtil.splitTrim(a, b , c,,);// [a, b, c]// 拼接字符串StringjoinedStrUtil.join(,,a,b,c);// a,b,cStringjoined2StrUtil.join(,,list);// a,b,c生产案例SQL条件拼接publicclassQueryBuilder{publicStringbuildWhereClause(QueryDTOquery){ListStringconditionsnewArrayList();if(StrUtil.isNotBlank(query.getName())){conditions.add(name LIKE %query.getName()%);}if(query.getMinAge()!null){conditions.add(age query.getMinAge());}if(query.getMaxAge()!null){conditions.add(age query.getMaxAge());}if(conditions.isEmpty()){return;}return WHERE StrUtil.join( AND ,conditions);}}3.3 字符串格式化// 格式化字符串占位符{}StringformattedStrUtil.format(Hello {}, you are {} years old,Alice,25);// Hello Alice, you are 25 years old// 带序号的占位符Stringformatted2StrUtil.format(Hello {1}, your ID is {0},1001,Bob);// Hello Bob, your ID is 1001// 截取字符串StringsubStrUtil.sub(Hello World,0,5);// HelloStringsub2StrUtil.subPre(Hello World,5);// HelloStringsub3StrUtil.subSuf(Hello World,5);// World生产案例日志记录AspectComponentpublicclassLoggingAspect{Around(annotation(log))publicObjectlogExecutionTime(ProceedingJoinPointjoinPoint,Loglog)throwsThrowable{longstartTimeSystem.currentTimeMillis();StringmethodNamejoinPoint.getSignature().getName();Object[]argsjoinPoint.getArgs();// 格式化日志StringlogMsgStrUtil.format(Method [{}] started with args: {},methodName,JSONUtil.toJsonStr(args));logger.info(logMsg);ObjectresultjoinPoint.proceed();longendTimeSystem.currentTimeMillis();StringcompleteMsgStrUtil.format(Method [{}] completed in {}ms,methodName,endTime-startTime);logger.info(completeMsg);returnresult;}}3.4 其他实用方法// 重复字符串StringrepeatedStrUtil.repeat(*,10);// **********// 填充字符串StringpaddedStrUtil.padPre(123,6,0);// 000123Stringpadded2StrUtil.padAfter(123,6,0);// 123000// 首字母大写/小写StringcapitalizedStrUtil.upperFirst(hello);// HelloStringloweredStrUtil.lowerFirst(Hello);// hello// 下划线转驼峰StringcamelCaseStrUtil.toCamelCase(user_name);// userName// 驼峰转下划线StringunderlineStrUtil.toUnderlineCase(userName);// user_name四、Convert万能类型转换器4.1 基础类型转换importcn.hutool.core.convert.Convert;// 转换为字符串StringstrConvert.toStr(123);// 123Stringstr2Convert.toStr(true);// true// 转换为数字IntegernumConvert.toInt(123);// 123LonglongNumConvert.toLong(1000);// 1000LDoubledoubleNumConvert.toDouble(3.14);// 3.14// 转换失败时返回默认值Integernum2Convert.toInt(abc,0);// 0生产案例配置参数读取ComponentpublicclassConfigService{Value(${app.page.size:20})privateStringpageSize;Value(${app.cache.enabled:true})privateStringcacheEnabled;Value(${app.timeout:30000})privateStringtimeout;publicintgetPageSize(){returnConvert.toInt(pageSize,20);}publicbooleanisCacheEnabled(){returnConvert.toBool(cacheEnabled,true);}publiclonggetTimeout(){returnConvert.toLong(timeout,30000L);}}4.2 集合类型转换// 数组转ListInteger[]array{1,2,3,4,5};ListIntegerlistConvert.toList(Integer.class,array);// List转数组ListStringstrListArrays.asList(a,b,c);String[]strArrayConvert.toStrArray(strList);// 字符串转ListListIntegernumListConvert.toList(Integer.class,1,2,3,4,5);// 转换集合元素类型ListStringstringListArrays.asList(1,2,3);ListIntegerintListConvert.toList(Integer.class,stringList);生产案例批量数据处理publicclassDataImportService{publicvoidimportUsers(StringcsvData){ListStringlinesStrUtil.split(csvData,\n);for(Stringline:lines){ListStringfieldsStrUtil.split(line,,);if(fields.size()3){UserusernewUser();user.setName(fields.get(0));user.setAge(Convert.toInt(fields.get(1),0));user.setEmail(fields.get(2));userRepository.save(user);}}}publicListLongparseUserIds(StringidsStr){// 1,2,3,4,5 - [1L, 2L, 3L, 4L, 5L]returnConvert.toList(Long.class,idsStr);}}4.3 日期与时间转换// 各种类型转DateDatedate1Convert.toDate(2024-01-15);Datedate2Convert.toDate(System.currentTimeMillis());Datedate3Convert.toDate(LocalDateTime.now());// Date转其他类型LocalDateTimelocalDateTimeConvert.toLocalDateTime(newDate());longtimestampConvert.toLong(newDate());4.4 进制转换// 十进制转其他进制StringhexConvert.toHex(255);// FFStringbinaryConvert.toBinaryStr(10);// 1010// 其他进制转十进制intdecimalConvert.hexToInt(FF);// 255intdecimal2Convert.binaryToInt(1010);// 10五、JSONUtil / BeanUtil / IdUtil数据处理三剑客5.1 JSONUtilJSON处理importcn.hutool.json.JSONUtil;importcn.hutool.json.JSONObject;importcn.hutool.json.JSONArray;// 对象转JSON字符串UserusernewUser(Alice,25);StringjsonStrJSONUtil.toJsonStr(user);// {name:Alice,age:25}// JSON字符串转对象Stringjson{\name\:\Bob\,\age\:30};Useruser2JSONUtil.toBean(json,User.class);// JSON字符串转JSONObjectJSONObjectjsonObjJSONUtil.parseObj(json);StringnamejsonObj.getStr(name);IntegeragejsonObj.getInt(age);// 数组转JSONListUserusersArrays.asList(user,user2);StringarrayJsonJSONUtil.toJsonStr(users);// JSON字符串转ListStringjsonArray[{\name\:\Alice\,\age\:25}];ListUseruserListJSONUtil.toList(jsonArray,User.class);生产案例API响应封装publicclassApiResponseT{privateintcode;privateStringmessage;privateTdata;publicstaticTStringsuccess(Tdata){ApiResponseTresponsenewApiResponse();response.setCode(200);response.setMessage(success);response.setData(data);returnJSONUtil.toJsonStr(response);}publicstaticStringerror(Stringmessage){ApiResponseVoidresponsenewApiResponse();response.setCode(500);response.setMessage(message);returnJSONUtil.toJsonStr(response);}}RestControllerpublicclassUserController{GetMapping(/api/users/{id})publicStringgetUser(PathVariableLongid){UseruseruserService.findById(id);returnApiResponse.success(user);}}5.2 BeanUtilBean操作importcn.hutool.core.bean.BeanUtil;// Bean属性拷贝UsersourcenewUser(Alice,25);UsertargetnewUser();BeanUtil.copyProperties(source,target);// 忽略空值拷贝BeanUtil.copyProperties(source,target,CopyOptions.create().ignoreNullValue());// Bean转MapMapString,ObjectmapBeanUtil.beanToMap(user);// Map转BeanMapString,ObjectuserMapnewHashMap();userMap.put(name,Bob);userMap.put(age,30);UseruserBeanUtil.mapToBean(userMap,User.class,false);// 填充Bean属性UserusernewUser();BeanUtil.fillBeanWithMap(userMap,user,false);生产案例DTO转换publicclassUserService{publicUserVOconvertToVO(Useruser){UserVOvonewUserVO();// 拷贝同名属性BeanUtil.copyProperties(user,vo);// 额外设置vo.setRegisteredDays(calculateDays(user.getCreateTime()));returnvo;}publicUserconvertToEntity(UserDTOdto){UseruserBeanUtil.toBean(dto,User.class);// 设置默认值if(user.getStatus()null){user.setStatus(UserStatus.ACTIVE);}returnuser;}// 批量转换publicListUserVOconvertToVOList(ListUserusers){returnusers.stream().map(this::convertToVO).collect(Collectors.toList());}}5.3 IdUtilID生成importcn.hutool.core.util.IdUtil;// UUIDStringuuidIdUtil.randomUUID();// 带-的UUIDStringsimpleUUIDIdUtil.simpleUUID();// 不带-的UUIDStringfastUUIDIdUtil.fastUUID();// 性能更好的UUID// ObjectIdMongoDB风格StringobjectIdIdUtil.objectId();// Snowflake算法分布式IDlongworkerId1;longdatacenterId1;SnowflakesnowflakeIdUtil.getSnowflake(workerId,datacenterId);longidsnowflake.nextId();// 生成IDStringidStrsnowflake.nextIdStr();// 生成字符串ID生产案例订单号生成ComponentpublicclassOrderNoGenerator{privatefinalSnowflakesnowflake;publicOrderNoGenerator(){// 从配置中获取机器IDlongworkerIdgetWorkerId();longdatacenterIdgetDatacenterId();this.snowflakeIdUtil.getSnowflake(workerId,datacenterId);}// 生成订单号publicStringgenerateOrderNo(){// 订单前缀 雪花IDreturnORDsnowflake.nextIdStr();}// 生成支付流水号publicStringgeneratePaymentNo(){returnPAYDateUtil.format(newDate(),yyyyMMdd)snowflake.nextIdStr();}// 生成退款单号publicStringgenerateRefundNo(){returnREFsnowflake.nextIdStr();}privatelonggetWorkerId(){// 从配置或环境变量获取return1L;}privatelonggetDatacenterId(){return1L;}}六、FileUtil / HttpUtilIO与网络操作6.1 FileUtil文件操作importcn.hutool.core.io.FileUtil;// 读取文件StringcontentFileUtil.readUtf8String(data.txt);ListStringlinesFileUtil.readUtf8Lines(data.txt);byte[]bytesFileUtil.readBytes(image.png);// 写入文件FileUtil.writeUtf8String(Hello Hutool,output.txt);FileUtil.appendUtf8String(\nNew Line,output.txt);FileUtil.writeBytes(bytes,copy.png);// 复制文件FileUtil.copy(source.txt,target.txt,true);// 删除文件FileUtil.del(temp.txt);// 创建文件自动创建父目录FilefileFileUtil.touch(dir/subdir/file.txt);// 判断文件booleanexistsFileUtil.exist(data.txt);booleanisDirectoryFileUtil.isDirectory(dir);生产案例文件上传下载RestControllerRequestMapping(/api/file)publicclassFileController{Value(${upload.path})privateStringuploadPath;PostMapping(/upload)publicStringupload(RequestParam(file)MultipartFilefile){try{// 生成文件名StringoriginalNamefile.getOriginalFilename();StringextensionFileUtil.extName(originalName);StringfileNameIdUtil.simpleUUID().extension;// 保存文件StringfilePathuploadPathFile.separatorfileName;FileUtil.writeBytes(file.getBytes(),filePath);returnApiResponse.success(fileName);}catch(IOExceptione){returnApiResponse.error(上传失败);}}GetMapping(/download/{fileName})publicvoiddownload(PathVariableStringfileName,HttpServletResponseresponse){StringfilePathuploadPathFile.separatorfileName;if(!FileUtil.exist(filePath)){response.setStatus(404);return;}// 读取文件byte[]bytesFileUtil.readBytes(filePath);// 设置响应头response.setContentType(application/octet-stream);response.setHeader(Content-Disposition,attachment; filenamefileName);try{response.getOutputStream().write(bytes);}catch(IOExceptione){e.printStackTrace();}}}6.2 HttpUtilHTTP请求importcn.hutool.http.HttpUtil;importcn.hutool.http.HttpRequest;// GET请求StringresultHttpUtil.get(https://api.example.com/users);// 带参数的GET请求MapString,ObjectparamsnewHashMap();params.put(page,1);params.put(size,20);Stringresult2HttpUtil.get(https://api.example.com/users,params);// POST请求StringpostResultHttpUtil.post(https://api.example.com/users,{\name\:\Alice\});// 下载文件longsizeHttpUtil.downloadFile(https://example.com/file.pdf,output.pdf);// 更复杂的请求Stringresult3HttpRequest.post(https://api.example.com/login).header(Content-Type,application/json).header(Authorization,Bearer token).body({\username\:\admin\,\password\:\123456\}).timeout(20000).execute().body();生产案例第三方API调用ServicepublicclassWechatApiService{Value(${wechat.appid})privateStringappid;Value(${wechat.secret})privateStringsecret;// 获取AccessTokenpublicStringgetAccessToken(){Stringurlhttps://api.weixin.qq.com/cgi-bin/token;MapString,ObjectparamsnewHashMap();params.put(grant_type,client_credential);params.put(appid,appid);params.put(secret,secret);StringresultHttpUtil.get(url,params);JSONObjectjsonJSONUtil.parseObj(result);returnjson.getStr(access_token);}// 发送模板消息publicbooleansendTemplateMessage(Stringopenid,StringtemplateId,MapString,Objectdata){StringaccessTokengetAccessToken();Stringurlhttps://api.weixin.qq.com/cgi-bin/message/template/send?access_tokenaccessToken;MapString,ObjectbodynewHashMap();body.put(touser,openid);body.put(template_id,templateId);body.put(data,data);StringresultHttpRequest.post(url).header(Content-Type,application/json).body(JSONUtil.toJsonStr(body)).execute().body();JSONObjectjsonJSONUtil.parseObj(result);returnjson.getInt(errcode)0;}}七、生产实战综合案例案例1用户注册登录系统ServicepublicclassAuthService{AutowiredprivateUserRepositoryuserRepository;// 用户注册publicUserregister(RegisterDTOdto){// 1. 参数校验StrUtilif(StrUtil.hasBlank(dto.getUsername(),dto.getPassword(),dto.getEmail())){thrownewValidationException(参数不能为空);}// 2. 创建用户对象BeanUtilUseruserBeanUtil.toBean(dto,User.class);// 3. 生成用户IDIdUtiluser.setId(IdUtil.getSnowflake(1,1).nextId());// 4. 设置注册时间DateUtiluser.setCreateTime(newDate());user.setUpdateTime(newDate());// 5. 密码加密SecureUtilStringencryptedPasswordSecureUtil.md5(dto.getPassword());user.setPassword(encryptedPassword);returnuserRepository.save(user);}// 用户登录publicStringlogin(LoginDTOdto){// 查询用户UseruseruserRepository.findByUsername(dto.getUsername());if(usernull){thrownewBusinessException(用户不存在);}// 验证密码StringencryptedPasswordSecureUtil.md5(dto.getPassword());if(!StrUtil.equals(user.getPassword(),encryptedPassword)){thrownewBusinessException(密码错误);}// 生成TokenJWTMapString,ObjectpayloadnewHashMap();payload.put(userId,user.getId());payload.put(username,user.getUsername());payload.put(exp,DateUtil.offsetHour(newDate(),24).getTime());returnJWTUtil.createToken(payload,secret.getBytes());}}案例2数据导入导出ServicepublicclassDataExportService{// 导出用户数据为CSVpublicvoidexportUsers(ListUserusers,StringfilePath){ListStringlinesnewArrayList();// 添加标题行lines.add(ID,姓名,年龄,邮箱,注册时间);// 添加数据行for(Useruser:users){StringlineStrUtil.format({},{},{},{},{},user.getId(),user.getName(),user.getAge(),user.getEmail(),DateUtil.format(user.getCreateTime(),yyyy-MM-dd HH:mm:ss));lines.add(line);}// 写入文件FileUtil.writeUtf8Lines(lines,filePath);}// 从CSV导入用户数据publicListUserimportUsers(StringfilePath){ListUserusersnewArrayList();// 读取文件ListStringlinesFileUtil.readUtf8Lines(filePath);// 跳过标题行for(inti1;ilines.size();i){ListStringfieldsStrUtil.split(lines.get(i),,);if(fields.size()5){UserusernewUser();user.setId(Convert.toLong(fields.get(0)));user.setName(fields.get(1));user.setAge(Convert.toInt(fields.get(2)));user.setEmail(fields.get(3));user.setCreateTime(DateUtil.parse(fields.get(4)));users.add(user);}}returnusers;}}案例3定时报表生成ComponentpublicclassReportScheduler{AutowiredprivateOrderRepositoryorderRepository;AutowiredprivateEmailServiceemailService;// 每天凌晨1点生成昨日报表Scheduled(cron0 0 1 * * ?)publicvoidgenerateDailyReport(){// 获取昨天的日期范围DateyesterdayDateUtil.yesterday();DatestartTimeDateUtil.beginOfDay(yesterday);DateendTimeDateUtil.endOfDay(yesterday);// 查询订单数据ListOrderordersorderRepository.findByCreateTimeBetween(startTime,endTime);// 统计数据inttotalCountorders.size();BigDecimaltotalAmountorders.stream().map(Order::getAmount).reduce(BigDecimal.ZERO,BigDecimal::add);// 生成报表内容StringBuilderreportnewStringBuilder();report.append(日期: ).append(DateUtil.format(yesterday,yyyy-MM-dd)).append(\n);report.append(订单总数: ).append(totalCount).append(\n);report.append(交易总额: ).append(totalAmount).append(\n);// 保存报表文件StringfileNameStrUtil.format(report_{}.txt,DateUtil.format(yesterday,yyyyMMdd));FileUtil.writeUtf8String(report.toString(),reports/fileName);// 发送邮件通知emailService.send(adminexample.com,日报,report.toString());}}八、最佳实践与注意事项8.1 性能优化建议复用Snowflake实例// 推荐单例模式ComponentpublicclassIdGenerator{privatefinalSnowflakesnowflakeIdUtil.getSnowflake(1,1);publiclongnextId(){returnsnowflake.nextId();}}// 不推荐每次创建新实例publiclonggenerateId(){returnIdUtil.getSnowflake(1,1).nextId();// 每次都创建}合理使用缓存// 缓存常用的DateFormatprivatestaticfinalStringDATE_PATTERNyyyy-MM-dd HH:mm:ss;publicStringformatDate(Datedate){returnDateUtil.format(date,DATE_PATTERN);}8.2 异常处理// Convert转换时指定默认值IntegerageConvert.toInt(ageStr,0);// 文件操作捕获异常try{StringcontentFileUtil.readUtf8String(config.txt);}catch(IORuntimeExceptione){logger.error(读取文件失败,e);// 使用默认配置}// HTTP请求超时设置HttpRequest.post(url).timeout(5000)// 5秒超时.execute();8.3 线程安全Hutool的大部分工具类都是线程安全的但注意DateUtil线程安全StrUtil线程安全FileUtil文件操作本身需要注意并发Snowflake线程安全建议单例使用九、总结Hutool工具库为Java开发提供了全方位的工具支持8大核心工具类✅DateUtil日期时间处理支持解析、格式化、计算、判断✅StrUtil字符串操作判空、分割、格式化、命名转换✅Convert万能类型转换基础类型、集合、日期、进制✅JSONUtilJSON处理对象与JSON互转✅BeanUtilBean操作属性拷贝、Map互转✅IdUtilID生成UUID、Snowflake、ObjectId✅FileUtil文件操作读写、复制、删除✅HttpUtilHTTP请求GET、POST、下载核心优势开发效率提升60%一行代码完成复杂操作代码质量提升减少判空、异常处理等样板代码可靠性强经过数千项目验证无侵入性无第三方依赖轻量级