java - How to get all dates gathered throughout the whole 3 months and display using Thymeleaf with HTML?

Question

My table is able to get data from the past 3 months if I select them individually (For example, click March 2020 and it will display data from 2020).

But if I want it to display whole full 3 months of the data onto the table (For example, click "ALL" and it will display data from March, April and May).

What kind of logic or code should I add onto the SearchMonth.java in order to make it able to display it?

SearchMonth.java

import java.util.Calendar;
import java.util.Date;

package com.enums;

public enum SearchMonthPeriod {
  ALL("All", "All (Default)"),
  ONE("1", "A month Ago"),
  TWO("2", "Two months Ago"),
  THREE("3", "Three months Ago");

  SearchMonth(String code, String label) {
    this.code = code;
    this.label = label;
  }

  private String code;

  private String label;

  private static String[] months = {"January", "February", "March", "April", "May", "June", "July",
      "August", "September", "October", "November", "December"};

  public String getCode() {
    return code;
  }

  public String getLabel() {
    return label;
  }

  public static String[] getMonths() {
    return months;
  }
}

controller.java

private List<String> createMonthSearchOption() {
    Calendar cal = Calendar.getInstance();
    cal.setTime(new Date());
    int mon = cal.get(Calendar.MONTH);
    int year = cal.get(Calendar.YEAR);

    List<String> monthList = Arrays.asList(SearchMonthPeriod.getMonths());
    List<String> searchOption = new ArrayList<String>();

   
    // Last 3 months
    for (int a = 0; a < 3; a++) {
      searchOption.add(monthList.get(mon) + " " + String.valueOf(year));
      mon--; // Go to previous month

      // Reset if reach the first element
      if (mon == -1) {
        mon = 11;
        year--;
      }
    }
    return searchOption;
  }

html code (shortened)

<select id="month" th:field="*{month}"
class="browser-default custom-select">

<option
th:value="${T(com.cv.p2p.sc.enums.SearchMonth).ALL}"
th:text="All (Default)"></option>

<option
th:value="${T(com.cv.p2p.sc.enums.SearchMonth).ONE}"
th:text="${searchOption[0]}"></option>
<option
th:value="${T(com.cv.p2p.sc.enums.SearchMonth).TWO}"
th:text="${searchOption[1]}"></option>
<option
th:value="${T(com.cv.p2p.sc.enums.SearchMonth).THREE}"
th:text="${searchOption[2]}"></option>
</select>

question from:https://stackoverflow.com/questions/65950669/how-to-get-all-dates-gathered-throughout-the-whole-3-months-and-display-using-th

Answer 1

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