Spring MVC：处理来自时间表的值 - 多个对象

Question

我正在处理时间表/ actiontracker应用程序。我正在使用Spring MVC。这是我目前的情况：

我得到了一份表格，包含所有任务。在这些任务旁边有七个文本框（显示接下来七天的小时数）。用户必须能够保存任务（和小时）。我不确定如何将这些结果发送给控制器。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 

应该发送对象的任务列表回来，这样我就可以插入/更新/删除timerecord。

任何想法如何做到这一点？

Answer 1

这对我有效，希望这有助于！

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; 

您也可以下载整个示例项目在这里：

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