Common Interface Request parameter passing notes

1, @PathVariable

When using @RequestMapping URI template style mapping, i.e. someUrl / {paramId}, at this time may be bound by @Pathvariable paramId annotations on process parameter values ​​to pass over it.

@Controller 
@RequestMapping("/owners/{ownerId}") 
public class RelativePathUriTemplateController { 
 
  @RequestMapping("/pets/{petId}") 
  public void findPet(@PathVariable String ownerId,@PathVariable String petId, Model model) {     
    // implementation omitted 
  } 
} 

The code above and petId values ​​of variables ownerId the URI template, bound to the parameters of the method. If the uri template variable name and the name of the method parameters need to bind not, you need to specify the name uri template in the @PathVariable ( "name").

2、 @RequestHeader和@CookieValue

　　@RequestHeader annotations can request value Request header portion bound to the parameters of the method.

　　This is the header part of a Request:

Host                    localhost:8080 
Accept                  text/html,application/xhtml+xml,application/xml;q=0.9 
Accept-Language         fr,en-gb;q=0.7,en;q=0.3 
Accept-Encoding         gzip,deflate 
Accept-Charset          ISO-8859-1,utf-8;q=0.7,*;q=0.7 
Keep-Alive              300 

@RequestMapping("/displayHeaderInfo.do")
public void displayHeaderInfo(@RequestHeader("Accept-Encoding") String encoding,
                              @RequestHeader("Keep-Alive") long keepAlive)  {
 
  //...

The above code, the value of the Accept-Encoding request header portion, bound to the encoding parameters, and Keep-Alive header value is bound to the parameter keepAlive.

 

@CookieValue can Request header value on the cookie bound to the parameters of the method.

Cookie value, for example, the following:

// The 415A4AC178C59DACE0B2C9CA727CDD84 = JSESSIONID 
@RequestMapping ( "/ displayHeaderInfo.do" )
 public  void displayHeaderInfo (@CookieValue ( "JSESSIONID" ) String cookie) {
   // ... 
} // i.e. the value of the parameter to bind JSESSIONID cookie .

3、@RequestParam, @RequestBody

@RequestParam

　　Commonly used to handle simple type of binding, the annotation has two attributes: value, required; value is used to specify the value to be passed id name, required to indicate whether the parameter must be bound;

@RequestBody

　　The annotation process used to Content-Type: application / json, application / xml etc;