检查一个对象中的参数值是否为空

public class ValidUtils {public static <T> JSONObject inspect(T t, String requireParams) {JSONObject jsonResult = new JSONObject();jsonResult.put("code", CommonResultEnum.CHECK_VALID.code());String jsonString = JSONObject.toJSONString(t);JSONObject jsonObject = JSONObject.parseObject(jsonString);String[] params = requireParams.split(",");for (String param : params) {if (jsonObject.getString(param) == null || jsonObject.getString(param).isEmpty()) {jsonResult.put("code", CommonResultEnum.CHECK_VALID_ERROR.code());jsonResult.put("msg", String.format(CommonResultEnum.CHECK_VALID_ERROR.message(), param));break;}}return jsonResult;}
}

测试：

    @Testpublic void testValidUtils() {User user = new User();user.setUsername("张思睿");user.setPassword("123456");//user.setAge(23);JSONObject jsonResult = ValidUtils.inspect(user, "username,password,age");System.out.println(jsonResult.get("code") + ": " + jsonResult.get("msg"));}

打印：

20201: age参数为空

Bean以及集合之间浅拷贝

public class ConverterUtils {public static <V, C> C convert(V v, Class<C> beanClass) {if (ObjectUtils.isEmpty(v)) {return null;} else {C instance = null;try {instance = beanClass.newInstance();BeanUtils.copyProperties(v, instance);} catch (Exception var4) {var4.printStackTrace();}return instance;}}public static <V, C> List<C> convertList(List<V> vList, Class<C> beanClass) {List<C> cList = new ArrayList();if (CollectionUtils.isEmpty(vList)) {return cList;} else {vList.stream().forEach((v) -> {cList.add(convert(v, beanClass));});return cList;}}
}

测试convert方法：

	@Testpublic void testConverterByConverterUtils() {User user = User.builder().username("张思睿").password("123456").age(25).gender("男").hobby("女").build();Persion persion = ConverterUtils.convert(user, Persion.class);System.out.println(persion);}

打印：

Persion(username=张思睿, age=25, gender=男, hobby=女)

测试convertList方法：

private static List<User> users = new ArrayList<>();static {User user = User.builder().username("张兔").password("123456").age(25).gender("女").hobby("男").build();User user2 = User.builder().username("张思睿").password("123456").age(25).gender("男").hobby("女").build();users.add(user);users.add(user2);}/*** 测试 converterList方法* 具体实现 {@link ConverterUtils}*/@Testpublic void testConverterListByConverterUtils() {List<Persion> persions = ConverterUtils.convertList(users, Persion.class);persions.stream().forEach((persion) -> {System.out.println(persion);});}

打印：

Persion(username=张兔, age=25, gender=女, hobby=男)
Persion(username=张思睿, age=25, gender=男, hobby=女)

持续更新中。。。。

具体代码地址：https://github.com/haoxiaoyong1014/common-utils