如何根据当前日期过滤记录？答案

【问题标题】：How can I filter records according to current date?如何根据当前日期过滤记录？
【发布时间】：2019-10-09 07:29:05
【问题描述】：

我正在实现一个功能，我以字符串形式存储日期，并使用 LocalDate 函数获取字符串中的当前日期，所以我想比较两个日期，我只想获取当前日期记录。

未找到错误但无法获取记录。

  public ArrayList<Followup_Model> followup_reminder (ArrayList<Followup_Model> followup_Model_list) {
    if (followup_Model_list == null) {
        followup_Model_list = new ArrayList<>();
    }
    SQLiteDatabase sqLiteDatabase = this.getReadableDatabase();
    DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd");
    LocalDate localDate = LocalDate.now();
    String Today = dtf.format(localDate);
    Cursor followup_output = sqLiteDatabase.rawQuery("SELECT * FROM " + Table_Name_Followup +
            " WHERE CREATEDBY = '1' AND CHECKED = '1' AND STARTDATE = " + Today +
            " ORDER BY REMINDER ASC",null);

【问题讨论】：

尝试用单引号将日期括起来
@ScaryWombat 日期不固定它正在进入变量我如何将它放入单引号
AND STARTDATE = '" + Today + "'" + 或更好地使用 PreparedStatement 并使用参数

标签： java android sqlite date

【解决方案1】：

只需复制和粘贴。

public ArrayList<Followup_Model> followup_reminder (ArrayList<Followup_Model> 
 followup_Model_list) {
    if (followup_Model_list == null) {
        followup_Model_list = new ArrayList<>();
    }
    SQLiteDatabase sqLiteDatabase = this.getReadableDatabase();
    DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy/MM/dd");
    LocalDate localDate = LocalDate.now();
    String Today = dtf.format(localDate);
    Cursor followup_output = sqLiteDatabase.rawQuery("SELECT * FROM " + Table_Name_Followup +
            " WHERE CREATEDBY = '1' AND CHECKED = '1' AND STARTDATE = '" + Today + "'" +
            " ORDER BY REMINDER ASC",null);

【讨论】：