PostMapping ID处理

Question

我认为我的问题很简单，但是我没有找到解决方案。

我有一个HTML文件，其中创建了两个按钮

<button id="saveEmployee" type="submit" class="btn btn-primary">Save</button>
<button id="deleteEmployee" type="submit" class="btn btn-secondary">Delete</button>

并且我的控制器类中有两个PostMapping

    @PostMapping
public String saveButton(Employee employee) {
    Employee saved = employeeRepository.save(employee);

    return "redirect:/employee/" + saved.getEmployeeId() + "/view";
}

@PostMapping
public String deleteButton(Employee employee) {
    employeeRepository.deleteByEmployeeId(employee.getEmployeeId());

    return "redirect:/employee/create";
}

现在我想通过id“ saveEmployee”和“ deleteEmloyee”来处理正确的PostMapping。

我该怎么做？

Answer 1

您可以通过添加参数来检查它，以检查用户是否单击删除或保存。

例如

在按钮中添加名称和值属性

<button id="saveEmployee" name="btn" value="Save" type="submit" class="btn btn-primary">Save</button>
<button id="deleteEmployee" name="btn" value="Delete" type="submit" class="btn btn-secondary">Delete</button>

然后在您的控制器中使用@RequestMapping。

@RequestMapping(value="/someurl", method=RequestMethod.POST)
public String handleSaveDelete(@RequestParam("employee") Employee employee, @RequestParam("btn") String button){
  if("Save".equals(button)) {
    // Save
  }else if("Delete".equals(button)){
   // Delete
  }

  return "redirect:/";
}

希望能有所帮助，谢谢。

Answer 2

也许此页面对您有帮助https://spring.io/guides/gs/handling-form-submission/

一种方法可能类似于：

<form action="/save/" method="post">    
    <button id="saveEmployee" type="submit" class="btn btn-primary">Save</button>
</form>

<form action="/delete/" method="post">    
    <button id="deleteEmployee" type="submit" class="btn btn-secondary">Delete</button>
</form>

和：

    @PostMapping("/save/")
public String saveButton(Employee employee) {
    Employee saved = employeeRepository.save(employee);

    return "redirect:/employee/" + saved.getEmployeeId() + "/view";
}

@PostMapping("/delete/")
public String deleteButton(Employee employee) {
    employeeRepository.deleteByEmployeeId(employee.getEmployeeId());

    return "redirect:/employee/create";
}