方法参数类型 [java.lang.Integer] 缺少 URI 模板变量“studentId” - Spring MVC
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Missing URI template variable 'studentId' for method parameter type [java.lang.Integer] - Spring MVC
提问by just_a_girl
I'm getting this error when I try to redirect to a certain view.
当我尝试重定向到某个视图时出现此错误。
In one handler method i have:
在一种处理程序方法中，我有：
// get student ID, add it to model, and return redirect URI
Integer studentId = student.getStudentId();
model.addAttribute("studentId", studentId);
return "redirect:/students/{studentId}";
But I'm not getting the parameter studentIdin this handler method:
但是我没有studentId在这个处理程序方法中得到参数：
@RequestMapping(value="/{student}", method = RequestMethod.GET)
public String getStudent(@PathVariable Integer studentId, Model model) {
Student student = studentService.get(studentId);
model.addAttribute("student", student);
return "student";
}
What am I missing here?
我在这里缺少什么？
采纳答案by Sotirios Delimanolis
If you don't specify the name of the path variable, Spring tries to use the name of your parameter.
如果您没有指定路径变量的名称，Spring 会尝试使用您的参数名称。
Therefore in
因此在
@RequestMapping(value="/{student}", method = RequestMethod.GET)
public String getStudent(@PathVariable Integer studentId, Model model) {
Spring will try to find a path variable called studentIdwhile you have a path variable called student.
studentId当您有一个名为 的路径变量时，Spring 将尝试找到一个名为的路径变量student。
Just add a value attribute
只需添加一个值属性
@PathVariable("student") Integer studentId
or change the parameter name.
或更改参数名称。
