不要再封装各种 Util 工具类了，这个神级框架值得拥有！

   

    每日技术干货，第一时间送达！
   

<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.8.40</version>
</dependency>

// 快速对话
String chat = AIUtil.chat(new AIConfigBuilder(ModelName.DEEPSEEK.getValue()).setApiKey("your key").build(), "写一首赞美我的诗");

//多轮对话
List<Message> messages = new ArrayList<>();
messages.add(new Message("system","你是财神爷，只会说“我是财神”"));
messages.add(new Message("user","你是谁啊？"));
String chat = AIUtil.chat(new AIConfigBuilder(ModelName.DEEPSEEK.getValue()).setApiKey("your key").build(), messages);

/**
 * 猫猫类，使用实现Cloneable方式
 * @author Looly
 *
 */
privatestaticclassCatimplementsCloneable<Cat>{
private String name = "miaomiao";
privateint age = 2;

@Override
public Cat clone(){
    try {
      return (Cat) super.clone();
    } catch (CloneNotSupportedException e) {
      thrownew CloneRuntimeException(e);
    }
  }
}

cc.ryanc.halo.web.controller.admin.BackupController.backupResources = 0 01 * * ?
cc.ryanc.halo.web.controller.admin.BackupController.backupDatabase = 001 * * ?
cc.ryanc.halo.web.controller.admin.BackupController.backupPosts = 001 * * ?
@Override
public void onApplicationEvent(ContextRefreshedEvent event){
this.loadActiveTheme();
this.loadOptions();
this.loadFiles();
this.loadThemes();
//启动定时任务
 CronUtil.start();
 log.info("定时任务启动成功！");
}

//转换为字符串
int a =1;
String aStr = Convert.toStr(a);
//转换为指定类型数组
String[] b = {"1","2","3","4"};
Integer[] bArr = Convert.toIntArray(b);
//转换为日期对象
String dateStr ="2017-05-06";
Date date = Convert.toDate(dateStr);
//转换为列表
String[] strArr = {"a","b","c","d"};
List<String> strList = Convert.toList(String.class, strArr);

//Date、long、Calendar之间的相互转换
//当前时间
Date date = DateUtil.date();
//Calendar转Date
date = DateUtil.date(Calendar.getInstance());
//时间戳转Date
date = DateUtil.date(System.currentTimeMillis());
//自动识别格式转换
String dateStr ="2017-03-01";
date = DateUtil.parse(dateStr);
//自定义格式化转换
date = DateUtil.parse(dateStr,"yyyy-MM-dd");
//格式化输出日期
String format = DateUtil.format(date,"yyyy-MM-dd");
//获得年的部分
int year = DateUtil.year(date);
//获得月份，从0开始计数
int month = DateUtil.month(date);
//获取某天的开始、结束时间
Date beginOfDay = DateUtil.beginOfDay(date);
Date endOfDay = DateUtil.endOfDay(date);
//计算偏移后的日期时间
Date newDate = DateUtil.offset(date, DateField.DAY_OF_MONTH,2);
//计算日期时间之间的偏移量
long betweenDay = DateUtil.between(date, newDate, DateUnit.DAY);

//判断是否为空字符串
String str = "test";
StrUtil.isEmpty(str);
StrUtil.isNotEmpty(str);
//去除字符串的前后缀
StrUtil.removeSuffix("a.jpg", ".jpg");
StrUtil.removePrefix("a.jpg", "a.");
//格式化字符串
String template = "这只是个占位符:{}";
String str2 = StrUtil.format(template, "我是占位符");
LOGGER.info("/strUtil format:{}", str2);

//获取定义在src/main/resources文件夹中的配置文件
ClassPathResource resource =new ClassPathResource("generator.properties");
Properties properties =new Properties();
properties.load(resource.getStream());
LOGGER.info("/classPath:{}", properties);
ReflectUtil
Java反射工具类，可用于反射获取类的方法及创建对象。

//获取某个类的所有方法
Method[] methods = ReflectUtil.getMethods(PmsBrand.class);
//获取某个类的指定方法
Method method = ReflectUtil.getMethod(PmsBrand.class,"getId");
//使用反射来创建对象
PmsBrand pmsBrand = ReflectUtil.newInstance(PmsBrand.class);
//反射执行对象的方法
ReflectUtil.invoke(pmsBrand,"setId",1);

double n1 = 1.234;
double n2 =1.234;
double result;
//对float、double、BigDecimal做加减乘除操作
result = NumberUtil.add(n1, n2);
result = NumberUtil.sub(n1, n2);
result = NumberUtil.mul(n1, n2);
result = NumberUtil.div(n1, n2);
//保留两位小数
BigDecimal roundNum = NumberUtil.round(n1,2);
String n3 ="1.234";
//判断是否为数字、整数、浮点数
NumberUtil.isNumber(n3);
NumberUtil.isInteger(n3);
NumberUtil.isDouble(n3);
BeanUtil
JavaBean的工具类，可用于Map与JavaBean对象的互相转换以及对象属性的拷贝。

PmsBrand brand =new PmsBrand();
brand.setId(1L);
brand.setName("小米");
brand.setShowStatus(0);
//Bean转Map
Map<String, Object>map = BeanUtil.beanToMap(brand);
LOGGER.info("beanUtil bean to map:{}",map);
//Map转Bean
PmsBrand mapBrand = BeanUtil.mapToBean(map, PmsBrand.class,false);
LOGGER.info("beanUtil map to bean:{}", mapBrand);
//Bean属性拷贝
PmsBrand copyBrand =new PmsBrand();
BeanUtil.copyProperties(brand, copyBrand);
LOGGER.info("beanUtil copy properties:{}", copyBrand);

//数组转换为列表
String[] array =new String[]{"a","b","c","d","e"};
List<String> list = CollUtil.newArrayList(array);
//join：数组转字符串时添加连接符号
String joinStr = CollUtil.join(list,",");
LOGGER.info("collUtil join:{}", joinStr);
//将以连接符号分隔的字符串再转换为列表
List<String> splitList = StrUtil.split(joinStr,',');
LOGGER.info("collUtil split:{}", splitList);
//创建新的Map、Set、List
HashMap<Object,Object> newMap = CollUtil.newHashMap();
HashSet<Object> newHashSet = CollUtil.newHashSet();
ArrayList<Object> newList = CollUtil.newArrayList();
//判断列表是否为空
CollUtil.isEmpty(list);

//将多个键值对加入到Map中
Map<Object,Object> map = MapUtil.of(newString[][]{
    {"key1","value1"},
    {"key2","value2"},
    {"key3","value3"}
});
//判断Map是否为空
MapUtil.isEmpty(map);
MapUtil.isNotEmpty(map);
AnnotationUtil
注解工具类，可用于获取注解与注解中指定的值。

//获取指定类、方法、字段、构造器上的注解列表
Annotation[] annotationList = AnnotationUtil.getAnnotations(HutoolController.class,false);
LOGGER.info("annotationUtil annotations:{}", annotationList);
//获取指定类型注解
Api api = AnnotationUtil.getAnnotation(HutoolController.class, Api.class);
LOGGER.info("annotationUtil api value:{}", api.description());
//获取指定类型注解的值
Object annotationValue = AnnotationUtil.getAnnotationValue(HutoolController.class, RequestMapping.class);

//MD5加密
String str ="123456";
String md5Str = SecureUtil.md5(str);
LOGGER.info("secureUtil md5:{}", md5Str);
CaptchaUtil
验证码工具类，可用于生成图形验证码。

//生成验证码图片
LineCaptcha lineCaptcha = CaptchaUtil.createLineCaptcha(200,100);
try {
    request.getSession().setAttribute("CAPTCHA_KEY", lineCaptcha.getCode());
    response.setContentType("image/png");//告诉浏览器输出内容为图片
    response.setHeader("Pragma","No-cache");//禁止浏览器缓存
    response.setHeader("Cache-Control","no-cache");
    response.setDateHeader("Expire",0);
    lineCaptcha.write(response.getOutputStream());
}catch (IOException e) {
    e.printStackTrace();
}