Spring MVC：处理时间表中的值 - 多个对象

Question

我正在开发一个时间表/actiontracker 应用程序。我正在使用 Spring MVC。这是我目前的情况：

我得到了一个包含所有任务的表格。在这些任务旁边有七个文本框（显示接下来 7 天的小时数）。用户必须能够保存任务（和小时数）。我不确定如何将这些结果发送到控制器。它包含一个对象列表。 比方说……

TaskID - Taskname - D1 - D2 - D3 ...
1        Hello      5    3    2
2        Bai        4    2    1
3        I'm back   3    4    3

它应该发回一个任务对象列表，所以我可以插入/更新/删除一个时间记录。

任何想法如何做到这一点？

Answer 1

这对我有用，希望对你有帮助！

控制器

@Controller
public class ExampleController {

    private Timesheet timesheet;

    public ExampleController() {
        List<Task> tasks = new ArrayList<Task>();
        tasks.add(new Task(1, "Hello", 0, 0, 0, 0, 0, 0, 0));
        tasks.add(new Task(2, "Bai", 0, 0, 0, 0, 0, 0, 0));
        tasks.add(new Task(3, "I'm back", 0, 0, 0, 0, 0, 0, 0));
        this.timesheet = new Timesheet(tasks);
    }

    @RequestMapping(value = "/timesheet.do", method = RequestMethod.GET)
    public ModelAndView displayTimeSheet() {
        return new ModelAndView("timesheet", "timesheet", timesheet);
    }

    @RequestMapping(value = "/timesheet.do", method = RequestMethod.POST)
    public ModelAndView updateTimeSheet(@ModelAttribute("timesheet") Timesheet timesheet) {
        this.timesheet = timesheet;
        return new ModelAndView("timesheet", "timesheet", timesheet);
    }

}

JSP 页面

<form:form commandName="timesheet">
  <table>
    <tr>
      <th>TaskID</th>
      <th>Taskname</th>
      <th>D1</th>
      <th>D2</th>
      <th>D3</th>
      <th>D4</th>
      <th>D5</th>
      <th>D6</th>
      <th>D7</th>
    </tr>
    <c:forEach items="${timesheet.tasks}" var="task" varStatus="tasksRow">
      <tr>
        <td>
          <form:hidden path="tasks[${tasksRow.index}].id"/>
          <c:out value="${timesheet.tasks[tasksRow.index].id}"/>
        </td>
        <td>
          <form:hidden path="tasks[${tasksRow.index}].name"/>
          <c:out value="${timesheet.tasks[tasksRow.index].name}"/>
        </td>
        <td>
          <form:input path="tasks[${tasksRow.index}].day1hours"/>
        </td>
        <td>
          <form:input path="tasks[${tasksRow.index}].day2hours"/>
        </td>
        <td>
          <form:input path="tasks[${tasksRow.index}].day3hours"/>
        </td>
        <td>
          <form:input path="tasks[${tasksRow.index}].day4hours"/>
        </td>
        <td>
          <form:input path="tasks[${tasksRow.index}].day5hours"/>
        </td>
        <td>
          <form:input path="tasks[${tasksRow.index}].day6hours"/>
        </td>
        <td>
          <form:input path="tasks[${tasksRow.index}].day7hours"/>
        </td>
      </tr>
    </c:forEach>
  </table>
  <input type="submit"/>
</form:form>

模型类

public class Timesheet {

    private List<Task> tasks;

public class Task {

    private int    id;
    private String name;
    private int    day1hours;
    private int    day2hours;
    private int    day3hours;
    private int    day4hours;
    private int    day5hours;
    private int    day6hours;
    private int    day7hours;

您可以在此处下载整个示例项目：

http://www.bitsandbytecode.com/ftp/spring-mvc-multi-record-form.zip