Question

如何在Java中将本地日期列表添加到myList

请找到以下代码，并检查我在将日期添加到myList时出错的地方

我声明列表为本地日期，现在需要转换为myModel

错误发生在// myList.addAll（employeeReportsModel.getReportFromDt（））;

 @RequestMapping(value = "/getMusterRollDateBased", method = RequestMethod.GET)
 public ModelAndView getMusterRollDateBased(EmployeeReportsModel employeeReportsModel) {
    ModelAndView mv = new ModelAndView();
    String tablePrefix = "at_hr_logs_";

      try {
       System.out.println("refort from date.."+employeeReportsModel.getReportFromDt());

        System.out.println("refort to date.."+employeeReportsModel.getReportToDt());
        String fromdate = employeeReportsModel.getReportFromDt();
        String todate = employeeReportsModel.getReportToDt();
        Date date1 = new SimpleDateFormat("yyyy-MM-dd").parse(fromdate);
        Date date2 = new SimpleDateFormat("yyyy-MM-dd").parse(todate);
        System.out.println(date1 + "-----" + date2);            
        // parse the date into another format           
        SimpleDateFormat sdfDestination = new SimpleDateFormat("yyyy-MM-dd");           
        String fromdate1 = sdfDestination.format(date1);
        String todate1 = sdfDestination.format(date2);          
       employeeReportsModel.setReportFromDt(fromdate1);         
       // get dates between two dates           
       String startString = fromdate1;          
       String endString = todate1;

       LocalDate incrementingDate = LocalDate.parse(startString);
       LocalDate endDate = LocalDate.parse(endString);
       List<LocalDate> allDates = new ArrayList<>();

        while (!incrementingDate.isAfter(endDate)) {
            allDates.add(incrementingDate);
            incrementingDate = incrementingDate.plusDays(1);
        }

        System.err.println(allDates);
        List<EmployeeReportsModel> myList = null;   
        mv.addObject("allDates",allDates);
        for (LocalDate date : allDates) {
            //System.out.println();             
            System.out.println("dates is..." + date);
            employeeReportsModel.setReportFromDt(date.toString());              
            String[] parts = date.toString().split("-");
            String part1 = parts[0]; // 004
            String part2 = parts[1]; // 034556
            System.out.println("year ....." + part1);
            System.out.println("Month....." + part2);

            String tableName = tablePrefix + part1 + '_' + part2;
            System.out.println("hks table name is.." + tableName);
            employeeReportsModel.setDynamicTableName(tableName);
            myList.addAll(employeeReportsModel.getReportFromDt());
          //here we get a problem to add
}

    } catch (Exception e) {
        e.printStackTrace();
    }
    mv.setViewName("/" + moduleName + "/employeeMusterRollBasedOnDateInter");
    return mv;

}

Answer 1

第一件事是您对一个空对象调用myList.addAll()。您的列表应该像myList = new ArrayList()这样正确初始化。

然后，您尝试将String类型存储在列表中，该列表需要一个EmployeeReportsModel类型的对象。

因此，您可以将myList更改为List<String>的形式，或者更改getReportFromDt()方法的返回类型。

我建议您重新考虑当前的代码。

当前，您基本上正在执行以下操作：获取本地日期>使用它创建一个字符串>使用setReportFromDt存储它>调用getReportFromDt>尝试以字符串形式将LocalDate存储到EmployeeReportsModel类型的列表中

如何在Java中将LocalDate列表添加到myList

1 个答案: