Spring MVC将嵌套自定义类型列表绑定到多个JSP表单

Question

案例：我有一个组织对象。它有一个部门对象列表，每个部门都有一个员工对象列表。

在JSP中，我有一个复选框列表，它将复选框绑定到员工对象（深入2个层次结构。那就是组织-

<input type="checkbox" name="adminDepartmentList[${status.index}].employeeList" value="${employee.firstName}"> <c:out value="${employee.firstName}" /><br>

如您所见：

adminDepartmentList[0].employeeList --> John
adminDepartmentList[2].employeeList --> Rose

装订很好。表单提交后，在controller中，我可以循环查看admin departmentList，查找创建的所有部门，并查找由于选中复选框而创建的员工。

问题：（部门是用空名称和非空雇员列表创建的。我找不到雇员列表所属部门的名称：（那么我如何传递一些部门名称，以便将名称注入到部门（因为它正在创建）就像“。雇员列表”如何注入到部门一样。

细节：为您提供我工作的细节：

组织类有两个部门列表。部门类有一个员工列表。员工有名字、姓氏和小时工作时间。

public class Organization{
  private long id;
  private String name;
  private List<Department> adminDepartmentList;   //n admin departments
  private List<Department> employeeDepartmentList //m employee departments
// default constructor and all getters and setters
}

public class Department{
  private long id;
  private String name;
  private List<Employee> employeeList; //k employees
  //default constructor and all getters and setters
}

public class Employee{
  private long id;
  private String firstName;
  private String lastName;
  private int hoursToWork;  // to be filled from Spring MVC form
  //default contructor and all getters and setters
}

部门列表来自API。该部门的所有员工都来自另一个API。

我正在编写一个客户端，该客户端允许用户通过首先选择他们感兴趣的部门来创建“定制组织”，然后对于所选的每个部门，用户从与该部门相关的所有员工中选择一部分员工。

因此，我有3个JSP表单：

组织形式（Organization.jsp）：输入组织名称字段和所有部门的复选框列表。用户可以为正在创建的新组织选择一组部门。

<form:form name='fs' action="department.htm"  method='POST' commandName="organization">
            Organization Name:
            <input type="text" name="name" >
            <!-- ============================================================== -->
            Departments:<br> Select admin-departments you want.
            <div class="checkbox-list">
            <%-- Size :<c:out value="${organization.adminDepartmentList.size}"/> --%>
                <c:forEach var="i" varStatus="status" items="${organization.adminDepartmentList}">
              <input type="checkbox" name="adminDepartmentList" value="${i.name}"> <c:out value="${i.name}" /><br>
                  </c:forEach>
            </div>
            <!-- ============================================================== -->
            Departments:<br> Select employee-departments you want.
            <div class="checkbox-list">
                <c:forEach var="i" varStatus="status" items="${organization.employeeDepartmentList}">            
                      <input type="checkbox" name="employeeDepartmentList" value="${i.name}"> <c:out value="${i.name}" /><br>
                  </c:forEach>
            </div>
            <button type="submit" class="btn btn-lg btn-primary btn-block">Next Step</button>
  </form:form>

部门表单（Department.jsp）：对于所选的每个部门，这将显示要为该部门选择的员工的复选框列表。

<form:form name='f' action="employee.htm"  method='POST' commandName="organization">
            Organization Name: <c:out value="${organization.name}" /><br>
            Select Employees you want for your new Departments.
            Admin Departments:<br>
                <c:forEach var="department" varStatus="status" items="${organization.adminDepartmentList}">
                ______Dept: <c:out value="${department.name}" /><br>
                <div class="checkbox-list">
                    <c:forEach var="employee" varStatus="status" items="${department.employeeList}">
                          <input type="checkbox" name="adminDepartmentList[${status.index}].employeeList" value="${employee.firstName}"> <c:out value="${employee.firstName}" /><br>
                    </c:forEach>
                </div>
                </c:forEach>

              Employee Departments:<br>
                <c:forEach var="department" varStatus="status" items="${organization.employeeDepartmentList}">
                ______Dept: <c:out value="${department.name}" /><br>
                <div class="checkbox-list">
                    <c:forEach var="employee" varStatus="status" items="${department.employeeList}">
                          <input type="checkbox" name="employeeDepartmentList[${status.index}].employeeList" value="${employee.firstName}"> <c:out value="${employee.firstName}" /><br>
                    </c:forEach>
                </div>
                </c:forEach>  

                  <button type="submit" class="btn btn-lg btn-primary btn-block">Next Step</button>
  </form:form>

员工表单（Employee.jsp）：对于在部门表单中选择的每个员工，这将显示员工姓名和一个字段，用于输入将分配给该员工的小时数。

员工控制器（部门名称为空的控制器）

@RequestMapping(value = "/employee", method = RequestMethod.POST)
  public String product_post(@ModelAttribute("organization") Organization organization, HttpServletRequest request,
            HttpServletResponse response, BindingResult result, ModelMap model) {
      System.out.println("=========== POST Employee CONTROLLER===============");
      //STEP 1. show me which employees are selected for each admin department.
      List<Department> adminDepartments = organization.getAdminDepartmentList();

      for(Department dept: adminDepartments){
        System.out.println("Admin Dept name::: " + dept.getName());  //<-----------Name Comes as null :(
        List<Employee> employeeList = dept.getEmployeeList();
        for(Employee emp: employeeList){
          System.out.println("Employee::"+ emp.getFirstName());
        }
      }

      //STEP 2. show me which employees are selected for each employee department.
      List<Department> employeeDepartments = organization.getEmployeeDepartmentList();
      for(Department dept: employeeDepartments){
        System.out.println("Employee Dept name::: " + dept.getName()); //<----------Name Comes as null :(
        List<Employee> employeeList = dept.getEmployeeList();
        for(Employee emp: employeeList){
          System.out.println("Employee::"+ emp.getFirstName());
        }
      }
      model.addAttribute("organization", organization);
    return "employee";
  }

已知：我理解为什么部门。name没有被注入，但我不知道如何解决它。如何将部门名称从外部循环注入到运行在下面c:foreach中的员工列表上的内部循环？或者如何将其与每个员工绑定。我怀疑它在这里：

Admin Departments:<br>
                    <c:forEach var="department" varStatus="status" items="${organization.adminDepartmentList}">
                    ______Dept: <c:out value="${department.name}" /><br>
                    <div class="checkbox-list">
                        <c:forEach var="employee" varStatus="status" items="${department.employeeList}">
                              <input type="checkbox" name="adminDepartmentList[${status.index}].employeeList" value="${employee.firstName}"> <c:out value="${employee.firstName}" /><br>
                        </c:forEach>
                    </div>
                    </c:forEach>

我尝试隐藏输入来帮助创建命名部门，但没有帮助。

学分：

为简单起见，假设员工的FirstName是唯一的。department.name也是唯一的。谢谢。

Answer 1

新闻：哦，哇，天哪，我解决了。

缺少的部分：隐藏输入，告诉创建哪个部门以及向其中注入什么名称。

<form:hidden path="adminDepartmentList[${statusDepartment.index}].name"  value="${department.name}" />

将部门名称注入到spring创建的每个部门。

整体解决方案：department.jsp

<form:form name='f' action="employee.htm"  method='POST' commandName="organization">
              Organization Name: <c:out value="${organization.name}" /><br>
              Select Employees you want for your new Departments.
              Admin Departments:<br>
                  <c:forEach var="department" varStatus="statusDepartment" items="${organization.adminDepartmentList}">
                      ______Dept: <c:out value="${department.name}" /><br>
                      <div class="checkbox-list">
                            <form:hidden path="adminDepartmentList[${statusDepartment.index}].name"  value="${department.name}" />
                            <c:forEach var="employee" varStatus="statusEmployee" items="${department.employeeList}">
                                <form:checkbox path="adminDepartmentList[${statusDepartment.index}].employeeList" value="${employee.firstName}"/> <c:out value="${employee.firstName}" /><br>
                            </c:forEach>
                      </div>
                  </c:forEach>

                Employee Departments:<br>
                  <c:forEach var="department" varStatus="statusDepartment" items="${organization.employeeDepartmentList}">
                      ______Dept: <c:out value="${department.name}" /><br>
                      <div class="checkbox-list">
                            <form:hidden path="employeeDepartmentList[${statusDepartment.index}].name" value="${department.name}" />
                            <c:forEach var="employee" varStatus="statusEmployee" items="${department.employeeList}">
                                <form:checkbox path="employeeDepartmentList[${statusDepartment.index}].employeeList" value="${employee.firstName}"/> <c:out value="${employee.firstName}" /><br>
                            </c:forEach>
                      </div>
                  </c:forEach>  

                    <button type="submit" class="btn btn-lg btn-primary btn-block">Next Step</button>
    </form:form>