在Spring中结合GET和POST请求方法

Question

我有一个资源支持GET和POST请求。这里是示例资源的示例代码：

@RequestMapping(value = "/books", method = RequestMethod.GET)
public ModelAndView listBooks(@ModelAttribute("booksFilter") BooksFilter filter, two @RequestParam parameters, HttpServletRequest request)
    throws ParseException {
        LONG CODE
}


@RequestMapping(value = "/books", method = RequestMethod.POST)
public ModelAndView listBooksPOST(@ModelAttribute("booksFilter") BooksFilter filter, BindingResult result)
        throws ParseException {
        SAME LONG CODE with a minor difference
}

除了变量定义外，这两种方法中的代码实际上是相同的。使用method={RequestMethod.POST，RequestMethod.GET}和一个简单的if可以轻松地将这两种方法结合起来。我试过了，但没有成功，因为这两种方法在最后有一个不同的参数，即HttpServletRequest和BindingResult（请求参数不是必需的，因此在请求后不需要）。有没有办法把这两种方法结合起来？




Answer 1

@RequestMapping(value = "/books", method = { RequestMethod.GET, 
RequestMethod.POST })
public ModelAndView listBooks(@ModelAttribute("booksFilter") BooksFilter filter,
     HttpServletRequest request) 
    throws ParseException {

//your code 
}

这将适用于GET和POST。

对于GET，如果pojo（BooksFilter）必须包含您在请求参数中使用的属性

如下所示

public class BooksFilter{

private String parameter1;
private String parameter2;

   //getters and setters

URl应如下所示

/书？参数1=blah

就像这样，你可以将它用于GET和POST

Answer 2

下面是一个方法，你可以实现这一点，可能不是一个理想的方式。

让一个方法接受这两种类型的请求，然后检查您收到的请求类型是“GET”还是“POST”，一旦您知道了这一点，请执行相应的操作，并调用一个方法，该方法对两种请求方法（即GET和POST）执行常见任务。

@RequestMapping(value = "/books")
public ModelAndView listBooks(HttpServletRequest request){
     //handle both get and post request here
     // first check request type and do respective actions needed for get and post.

    if(GET REQUEST){

     //WORK RELATED TO GET

    }else if(POST REQUEST){

      //WORK RELATED TO POST

    }

    commonMethod(param1, param2....);
}

Answer 3

@RequestMapping(value = "/testonly", method = { RequestMethod.GET, RequestMethod.POST })
public ModelAndView listBooksPOST(@ModelAttribute("booksFilter") BooksFilter filter,
        @RequestParam(required = false) String parameter1,
        @RequestParam(required = false) String parameter2, 
        BindingResult result, HttpServletRequest request) 
        throws ParseException {

    LONG CODE and SAME LONG CODE with a minor difference
}

如果@RequestParam（required=true）则必须传递参数1、参数2

使用BindingResult并根据您的条件请求它们。

另一种方式

@RequestMapping(value = "/books", method = RequestMethod.GET)
public ModelAndView listBooks(@ModelAttribute("booksFilter") BooksFilter filter,  
    two @RequestParam parameters, HttpServletRequest request) throws ParseException {

    myMethod();

}


@RequestMapping(value = "/books", method = RequestMethod.POST)
public ModelAndView listBooksPOST(@ModelAttribute("booksFilter") BooksFilter filter, 
        BindingResult result) throws ParseException {

    myMethod();

    do here your minor difference
}

private returntype myMethod(){
    LONG CODE
}