第一步：引入依赖

        <dependency><groupId>cn.hutool</groupId><artifactId>hutool-parent</artifactId><version>5.7.17</version></dependency>

 

第二步：各种用法

 ①生成随机数

//生成验证码
String s = RandomUtil.randomNumbers(6);
System.out.println("s = " + s);

 

 

②两个对象之间信息过滤

//两个对象过滤信息
User user=new User(1L,"zzl",18,"12345678912");
UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
System.out.println("userDTO = " + userDTO);

 

 

③生成UUID

//生成UUID
//生成的UUID是带-的字符串，类似于：a5c8a5e8-df2b-4706-bea4-08d0939410e3
String uuid = IdUtil.randomUUID();
System.out.println("uuid = " + uuid);//生成的是不带-的字符串，类似于：b17f24ff026d40949c85a24f4f375d42
String simpleUUID = IdUtil.simpleUUID();
System.out.println("simpleUUID = " + simpleUUID);

 

④MD5加密

//md5加密
String str = "123456";
String md5Str = SecureUtil.md5(str);
System.out.println("md5Str = " + md5Str);

 

⑤序列化(即JSON字符串与对象之间的转换)

//JSON字符串与对象之间的序列化
User user1=new User(1L,"zzl",18,"12345678912");
System.out.println("user1 = " + user1);//对象转换为JSON字符串
String object_json = JSONUtil.parse(user1).toString();
System.out.println("object_json = " + object_json);//JSON字符串转为对象
User user2 = JSONUtil.toBean(object_json, User.class);
System.out.println("user2 = " + user2);

 

 

 ⑥字段检验器

//判断是否为邮箱地址boolean result = Validator.isEmail("zuozewei@hotmail.com");log.info("Validator isEmail:{}", result);//判断是否为手机号码result = Validator.isMobile("18911111111");log.info("Validator isMobile:{}", result);//判断是否为汉字result = Validator.isChinese("你好");log.info("Validator isChinese:{}", result);//判断是否为身份证号码（18位中国）result = Validator.isCitizenId("123456");log.info("Validator isCitizenId:{}", result);//判断是否为URLresult = Validator.isUrl("http://www.7d.com");log.info("Validator isUrl:{}", result);//判断字符串是否为数字result = Validator.isNumber("4444444");System.out.println("result = " + result);

想了解了解更多可以去Hutool官网