superzjn

class Solution {
    public ListNode reverseKGroup(ListNode head, int k) {

        if (head == null) return null;
        
        ListNode start = head;
        ListNode end = head;
        
        for (int i = 0; i < k; i ++) {
            

superzjn

package com.superzjn;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

superzjn

package com.morningstar.uim.util;

import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
import com.amazonaws.services.simplesystemsmanagement.AWSSimpleSystemsManagement;
import com.amazonaws.services.simplesystemsmanagement.AWSSimpleSystemsManagementClient;
import com.amazonaws.services.simplesystemsmanagement.AWSSimpleSystemsManagementClientBuilder;
import com.amazonaws.services.simplesystemsmanagement.model.GetParameterRequest;
import com.amazonaws.services.simplesystemsmanagement.model.GetParameterResult;
import java.util.concurrent.ConcurrentHashMap;
import org.springframework.context.annotation.Bean;

superzjn

package com.superzjn;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.stream.Collectors;

superzjn

public Object deepCopy(Object object) {
  ByteArrayOutputStream bo = new ByteArrayOutputStream();
  ObjectOutputStream oo = new ObjectOutputStream(bo);
  oo.writeObject(object);
  
  ByteArrayInputStream bi = new ByteArrayInputStream(bo.toByteArray());
  ObjectInputStream oi = new ObjectInputStream(bi);
  
  return oi.readObject();

superzjn

public static String fetchHttpContent(String url, String postData, Map<String, String> headers) {
        log.debug("url:" + url);
        StringBuilder content = new StringBuilder();
        try {
            Util.disableSSL();
            log.debug("start connection to " + url);
            java.security.Security.setProperty("networkaddress.cache.ttl", "60");
            HttpURLConnection con = (HttpURLConnection) new URL(url).openConnection();
            con.setRequestProperty("Accept", CONTENT_TYPE);
            con.setRequestMethod(postData == null ? "GET" : "POST");

superzjn

package com.shxt.demo02;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

public class Demo18 {
    public static void main(String[] args) {
        LocalDateTime date = LocalDateTime.now();

superzjn

package com.shxt.demo02;

import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;

public class Demo12 {
    public static void main(String[] args) {

        ZoneId america = ZoneId.of("America/New_York");

superzjn

package com.shxt.demo02;

import java.time.LocalTime;

public class Demo06 {
    public static void main(String[] args) {
        LocalTime time = LocalTime.now();
        System.out.println("获取当前的时间,不含有日期:"+time);

superzjn

package com.shxt.demo02;

import java.time.LocalDate;
import java.time.temporal.ChronoUnit;

public class Demo09 {
    public static void main(String[] args) {
        LocalDate today = LocalDate.now();

        LocalDate previousYear = today.minus(1, ChronoUnit.YEARS);