在Spring中结合GET和POST请求方法

Question 1

我有同时支持GET和POST请求的资源。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
}

这两个方法中的代码实际上是相同的，除了可以说一个变量定义。可以使用method = {RequestMethod.POST, RequestMethod.GET}和简单的if内部将两种方法轻松组合。我试过了，但是不起作用，因为这两种方法的末尾都有一个不同的参数，即HttpServletRequestand BindingResult（（@RequestParam不需要，因此在POST请求中不需要）。任何想法如何结合这两种方法？

Question 2

@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
}

如果这样，@RequestParam(required = true)则必须传递parameter1，parameter2

使用BindingResult并根据您的条件请求它们。

另一种方法

@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
}

Question 3

下面是实现此目标的一种方法，可能不是理想的方法。

有一种方法可以同时接受两种类型的请求，然后检查您收到的是“ GET”还是“ POST”类型的请求，一旦知道了，就进行相应的操作并调用一种可以完成常见任务的方法都请求方法，即GET和POST。

@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....);
}

Question 4

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

//your code 
}

这将同时适用于GET和POST。

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

像下面

public class BooksFilter{

private String parameter1;
private String parameter2;

   //getters and setters

URl应该如下所示

/ books？parameter1 = blah

这样，您可以将其用于GET和POST