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java - 如何将数据保存在多个 sql 行的一个 thymeleaf 页面中

转载 作者：行者123 更新时间：2023-11-29 07:17:51 25 4
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我是 spring-boot 的新手。在我的 thymeleaf 页面中，我使用了一个 for 循环来生成标题并在每个标题下都有一个下拉列表。我需要将该标题和选定的下拉项保存在一个 sql 行中。(例如:我在 for 循环中使用一周中的几天作为标题，用户可以在每个标题下选择一个主题，当用户选择主题并单击提交按钮时，应保存 5 条 sql 行以及日期和主题)但目前它将所有日期和主题保存在 1 条 sql 行 enter image description here enter image description here enter image description hereaddTimeTableMapping thymeleaf View 

<!DOCTYPE html>
<html xmlns:th="https://www.thymeleaf.org">
<head>
    <link rel="stylesheet" type="text/css" href="static/css/timeTableMapping.css" th:href="@{/css/timeTableMapping.css}">
    <meta charset="UTF-8">
    <title>Time Table</title>
</head>
<body>



</form>
<div class="container2">
    <form action="#" th:action="@{/timeTableMapping/saveAll}" th:object="${timeTableMapping}" method="post">
        <table border="0" cell[adding="10">
            <tr>
                <td><h1>Time Table:</h1></td>
                <td>
                    <select th:field="*{time_table_code}">
                        <option value="">Choose..</option>
                        <option th:each="timeTable: ${timeTables}" th:value="${timeTable.name}" th:text="${timeTable.name}"/>
                    </select>
                </td>
            </tr>
        </table>

        <table border="1" >
            <thead>
            <tr>
            </tr>
            <br>

            <th:block th:each="day : ${days}">
                <th th:value="${day.name}" th:text="${day.name}"></th>
            </th:block>


            </thead>
            <tbody>




            <th:block th:each="day : ${days}">
                <td>
                    <select th:field="*{subject_code}">
                        <option value=""></option>
                        <option th:each="subject: ${subjects}" th:value="${subject.subject_code}" th:text="${subject.name}"/>
                        <td><input type="text"  th:value="${day.name}" name="day" style="display:none" /></td>

                    </select>
                </td>
            </th:block>


            <tr>
                <td colspan="2">
                    <button type="submit">Save</button>

                </td>
            </tr>

            </tbody>
        </table>
    </form>
</div>

</body>
</html>

时间表映射 Controller 

  @Controller
public class TimeTableMappingController {
    @Autowired
    private  TimeTableMappingDAO timeTableMappingDAO;

    @Autowired
    private TimeTableDAO timeTableDAO;

    @Autowired
    private SubjectDAO subjectDAO;

    @Autowired
    private StudentGroupDAO studentGroupDAO;

    @Autowired
    private DayDAO dayDAO;

    @Autowired
    private TimeDAO timeDAO;



    @RequestMapping("/timeTableMapping")
    public String viewHomePage(Model model){
        List<TimeTableMapping> timeTableMappingDetails= timeTableMappingDAO.findAll();
        model.addAttribute("timeTableMappingDetails",timeTableMappingDetails);
        return "timeTableMapping";
    }

    /*
    @RequestMapping ("/timeTableMapping/new")
    public String addTimeTableMapping(Model model) {
        TimeTableMappingDTO timeTablesForm = new TimeTableMappingDTO();
        for (int i = 1; i <= 3; i++) {
            timeTablesForm.addTimeTableMapping(new TimeTableMapping());
        }

        model.addAttribute("form", timeTablesForm);

        return "addTimeTableMapping";
    }
    */


    @RequestMapping(value="/timeTableMapping/saveAll",method= RequestMethod.POST)
    public String saveTimeTable(@ModelAttribute("timeTableMapping") TimeTableMapping timeTableMapping){

        String[] dayArray = timeTableMapping.getDay().split(",");
        String[] subArray = timeTableMapping.getSubject_code().split(",");


        List<TimeTableMapping> tempList = new ArrayList<>();
        for(int i = 0 ; i < dayArray.length; i++) {
            TimeTableMapping tempTimeTable = new TimeTableMapping();
            tempTimeTable.setTime_table_code(timeTableMapping.getTime_table_code());
            System.out.println(timeTableMapping.getTime_table_code());
            tempTimeTable.setDay(dayArray[i]);
            System.out.println(dayArray[i]);
            tempTimeTable.setSubject_code(subArray[i]);
            System.out.println(subArray[i]);
            tempTimeTable.setStart(timeTableMapping.getStart());
            tempTimeTable.setEnd(timeTableMapping.getEnd());
            tempList.add(tempTimeTable);
        }
        timeTableMappingDAO.saveAll(tempList);
        return  "redirect:/timeTableMapping";
    }


    @RequestMapping("/timeTableMapping/new")
    public String addTimeTableMapping(Model model){
        System.out.println("hey");
        System.out.println("hey");
        TimeTableMapping timeTableMapping =new TimeTableMapping();
        model.addAttribute("timeTableMapping",timeTableMapping);

        List<TimeTable> timeTableDetail = timeTableDAO.findAll();
        model.addAttribute("timeTables", timeTableDetail);

        List<Subject> subjectDetail = subjectDAO.findAll();
        model.addAttribute("subjects", subjectDetail);

        String[] days = new String[] { "Monday", "Tuesday"};

        List<Day> dayDetails = dayDAO.findAll();
        model.addAttribute("days",dayDetails);

        List<Time> timeDetails = timeDAO.findAll();
        model.addAttribute("times",timeDetails);

        return "addTimeTableMapping";
    }


/*

    @RequestMapping(value="/timeTableMapping/saveAll",method= RequestMethod.POST)
    public void saveAll(List<TimeTableMapping> timeTableMappingList) { timeTableMappingDAO.saveAll(timeTableMappingList);}

    @RequestMapping(value="/timeTableMapping/save",method= RequestMethod.POST)
    public String saveTimeTable(@ModelAttribute("timeTableMapping") TimeTableMapping timeTableMapping){
        System.out.println("hello");
        System.out.println("hello");
        System.out.println("hello");
        System.out.println(timeTableMapping.getId());
        System.out.println(timeTableMapping.getDay());
        System.out.println(timeTableMapping.getStart());
        System.out.println(timeTableMapping.getEnd());
        System.out.println(timeTableMapping.getSubject_code());
        System.out.println(timeTableMapping.getTime_table_code());
        timeTableMappingDAO.save(timeTableMapping);
        return  "redirect:/timeTableMapping/new";
    }
@RequestMapping(value="/timeTableMapping/saveAll",method= RequestMethod.POST) public String saveTimeTable(@ModelAttribute("timeTableMapping") TimeTableMapping timeTableMapping){

String[] dayArray = timeTableMapping.getDay().split(",");
String[] subArray = timeTableMapping.getSubject_code().split(",");


List<TimeTableMapping> tempList = new ArrayList<>();
for(int i = 0 ; i < dayArray.length; i++) {
    TimeTableMapping tempTimeTable = new TimeTableMapping();
    tempTimeTable.setTime_table_code(timeTableMapping.getTime_table_code());
    tempTimeTable.setDay(dayArray[i]);
    tempTimeTable.setSubject_code(subArray[i]);
    tempTimeTable.setStart(timeTableMapping.getStart());
    tempTimeTable.setEnd(timeTableMapping.getEnd());
    tempList.add(tempTimeTable);
}
timeTableMappingDAO.saveAll(tempList);
    return  "redirect:/timeTableMapping";
}
    /*
    @RequestMapping(value="/timeTableMapping/saveAll",method= RequestMethod.POST)
    public String saveAll(@ModelAttribute("timeTableMapping") TimeTableMapping timeTableMapping){
        timeTableDAO.saveAll(timeTableMapping);
        return  "redirect:/timeTableMapping";
    }*/

    @RequestMapping("/timeTableMapping/edit/{id}")
    public ModelAndView updateTimeTable(@PathVariable(name="id")Long id){
        ModelAndView mav=new ModelAndView(("updateTimeTable"));

        TimeTable timeTable = timeTableDAO.findById(id);
        mav.addObject("timeTable",timeTable);

        List<Subject> subjectDetails = subjectDAO.findAll();
        mav.addObject("subjects", subjectDetails);

        List<StudentGroup> studentGroupDetails = studentGroupDAO.findAll();
        mav.addObject("studentGroups",studentGroupDetails);

        List<Day> dayDetails = dayDAO.findAll();
        mav.addObject("days",dayDetails);

        List<Time> timeDetails = timeDAO.findAll();
        mav.addObject("times",timeDetails);

        return  mav;
    }

    @RequestMapping("/timeTableMapping/delete/{id}")
    public String deleteProduct(@PathVariable(name="id") Long id){
        timeTableDAO.delete(id);
        return  "redirect:/timeTable";
    }
}

timeTableMapping 存储库

@Repository
public interface TimeTableMappingRepository extends JpaRepository<TimeTableMapping, Long> {
}

最佳答案

您正在使用表单提交来保存复杂的数据，这比编写 java 脚本并将您的信息保存在 javascript 对象中并将 json 字符串发送到 Controller 以使用列表保存要复杂得多。

现在对于您的实现来说，简单的 hacky 解决方案就是这样。

1) saveTimeTable 实现如下

@RequestMapping(value="/timeTableMapping/saveAll",method= RequestMethod.POST) public String saveTimeTable(@ModelAttribute("timeTableMapping") TimeTableMapping timeTableMapping){

String[] dayArray = timeTableMapping.getDay().split(",");
String[] subArray = timeTableMapping.getSubject_code().split(",");  


List<TimeTableMapping> tempList = new ArrayList<>();
for(int i = 0 ; i < dayArray.length; i++) {
    TimeTableMapping tempTimeTable = new TimeTableMapping();
    tempTimeTable.setTime_table_code(timeTableMapping.getTime_table_code());        
    tempTimeTable.setDay(dayArray[i]);
    tempTimeTable.setSubject_code(subArray[i]);
    tempTimeTable.setStart(timeTableMapping.getStart());
    tempTimeTable.setEnd(timeTableMapping.getEnd());
    tempList.add(tempTimeTable);
}   
timeTableMappingDAO.saveAll(tempList);
    return  "redirect:/timeTableMapping";
}

关于java - 如何将数据保存在多个 sql 行的一个 thymeleaf 页面中，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/58248983/

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