qingcyb的博客

/** * 日期常量 * */public final class DateConstants { private DateConstants() { } private static final String DATE_FORMAT = "yyyy-MM-dd"; private static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";}...

1、不允许null值，不可变集合2、代码例子import com.google.common.collect.ImmutableList;public class MainTest { public static void main(String [] args) { ImmutableList<String> names = ImmutableList.of("张三", "李四"); System.out.println(names); .

import com.alibaba.fastjson.JSONArray;import com.alibaba.fastjson.JSONObject;import org.apache.commons.lang3.ArrayUtils;/** * 异常处理工具类 * */public final class HandleExceptionUtils { private HandleExceptionUtils(){} /** * 异常处理方法 *.

import java.util.concurrent.ExecutorService;import java.util.concurrent.ThreadPoolExecutor;import java.util.concurrent.TimeUnit;import java.util.concurrent.LinkedBlockingQueue;import java.util.concurrent.Executors;/** * 线层池通用方法 * */public final .

import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONObject;import lombok.Cleanup;import org.springframework.core.io.ClassPathResource;import org.springframework.core.io.Resource;import java.io.IOException;import java.io.InputStream;p.

import org.springframework.beans.BeanUtils;import org.springframework.util.CollectionUtils;import java.util.ArrayList;import java.util.List;import java.util.Objects;/** * 复制对象集合工具类 * */public class CopyUtils { /** * 复制对象 * * @.

1、pom.xml<dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>18.0</version></dependency>2、测试类import com.google.common.collect.ImmutableList;/** * I

public class Constant { // 时间常量 public static final String FORMAT_DEFAULT = "yyyy-MM-dd HH:mm:ss"; public static final String FORMAT_DATE = "yyyy-MM-dd";}

1、pom.xml<dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>18.0</version></dependency>2、测试类import com.google.common.collect.HashMultimap;public cla

StringUtils.join()：将数组或集合，以某拼接符拼接到一起形成新的字符串。1、pom.xml<dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.9</version></dependency>2、测试...

public static List selectNodesByPath(Map<String, Object> map, String path) { String[] split = path.split("/"); Map<String, Object> obj = map; return null;}

import java.util.ArrayList;import java.util.List;import java.util.stream.Collectors;/** * 获取两个集合去重的并集 */public class Util { /** * 获取两个集合去重的并集 * * @param bfList 第一个集合 * @param afList 第二个集合 * @return 去重之后的并集 */ p.

1、pom.xml依赖<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.68</version></dependency>2、实体类import lombok.AllArgsConstructor;import lombok.Data;i