将Spring表单元素映射到Hibernate实体中的@manytone元素

Question

我正在使用Spring Hibernate开发员工管理应用程序。我有两个实体，员工和部门。并且，员工实体有一个字段“部门”，该字段映射到部门实体，即@manytone。

@ManyToOne(cascade = {CascadeType.PERSIST})
@JoinColumn(name = "dept")
private Department dept;

并相应地在部门实体中进行“OneToMany映射”

@OneToMany(mappedBy = "dept")
private List<Employee> employees = new ArrayList<>();

我的JSP Spring表单映射到员工实体。它有一个表单：选择元素以选择值为部门ID的部门。

 <form:form modelAttribute="createEmployee"
            action="${pageContext.request.contextPath}/createdemployee"
            method="post">
 ..............
 ..............

<form:input path="employee.firstName" type="text" width="20px;" />
<form:select>
  <form:option value="1001">IT</form:option>
  <form:option value="1002">Finance</form:option>
  <form:option value="1003">Marketing</form:option>
  <form:option value="1004">Sales</form:option>
  <form:option value="1005">H.R</form:option>
</form:select>

如何在员工实体中设置Deparment对象，以根据表单上的选择进行设置？

控制器

@RequestMapping("/createdemployee")
public String goCreatedEmployee(Model model, Employee employee){
    employeeDataServices.addEmployee(employee);
    return "created_employee";
}

Answer 1

您可以像这样使用它：

<form:select path="employee.department.code">
  <form:option value="1001">IT</form:option>
  <form:option value="1002">Finance</form:option>
  <form:option value="1003">Marketing</form:option>
  <form:option value="1004">Sales</form:option>
  <form:option value="1005">H.R</form:option>
</form:select>

从控制器中获取员工模型并获取部门名称？

还要在代码中添加request方法-POST/PUT。

@RequestMapping(value = /createdemployee, method = RequestMethod.POST)
public String goCreatedEmployee(Model model, Employee employee){
    employeeDataServices.addEmployee(employee);
    return "created_employee";
}

让我知道它是否有效？