RequestMapping
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@RequestMapping
RequestMapping是一个用来处理请求地址映射的注解,可用于类或方法上。用于类上,表示类中的所有响应请求的方法都是以该地址作为父路径。
RequestMapping注解有六个属性,下面我们把她分成三类进行说明。
1、 value, method;
value:
method:
2、 consumes,produces;
consumes: 指定处理请求的提交内容类型(Content-Type),例如application/json, text/html;
produces:
3、 params,headers;
params: 指定request中必须包含某些参数值是,才让该方法处理。
headers: 指定request中必须包含某些指定的header值,才能让该方法处理请求。
示例:
1、value / method 示例
默认RequestMapping("....str...")即为value的值
- @Controller
- @RequestMapping("/appointments")
- public
class AppointmentsController { private final AppointmentBook appointmentBook; @Autowired public AppointmentsController(AppointmentBook appointmentBook) { this.appointmentBook = appointmentBook; } @RequestMapping(method = RequestMethod.GET) public Map get() { return appointmentBook.getAppointmentsForToday(); } @RequestMapping(value="/{day}", method = RequestMethod.GET) public Map @PathVariablegetForDay( @DateTimeFormat(iso=ISO.DATE) Date day, Model model) { return appointmentBook.getAppointmentsForDay(day); } @RequestMapping(value="/new", method = RequestMethod.GET) public AppointmentForm getNewForm() { return new AppointmentForm(); } @RequestMapping(method = RequestMethod.POST) public String @Validadd( AppointmentForm appointment, BindingResult result) { if (result.hasErrors()) { return "appointments/new"; } appointmentBook.addAppointment(appointment); return "redirect:/appointments"; } - }
value的uri值为以下三类:
A) 可以指定为普通的具体值;
B)
C) 可以指定为含正则表达式的一类值( URI Template Patterns with Regular Expressions);
example B
- @RequestMapping(value="/owners/{ownerId}",
method=RequestMethod.GET) - public
String @PathVariablefindOwner( String ownerId, Model model) { Owner owner = ownerService.findOwner(ownerId); model.addAttribute("owner", owner); return "displayOwner"; - }
example C
- @RequestMapping("/spring-web/{symbolicName:[a-z-]+}-{version:\d\.\d\.\d}.{extension:\.[a-z]}")
public void handle( @PathVariableString @PathVariableversion, String extension) { // ... } - }
2 consumes、produces 示例
cousumes的样例:
- @Controller
- @RequestMapping(value
= "/pets",method "application/json")= RequestMethod.POST, consumes= - public
void addPet( @RequestBodyPet pet, Model model) { // implementation omitted - }
produces的样例:
- @Controller
- @RequestMapping(value
= "/pets/{petId}",method "application/json")= RequestMethod.GET, produces= - @ResponseBody
- public
Pet @PathVariablegetPet( String petId, Model model) { // implementation omitted - }
方法仅处理request请求中Accept头中包含了"application/json"的请求,同时暗示了返回的内容类型为application/json;
3 params、headers 示例
params的样例:
- @Controller
- @RequestMapping("/owners/{ownerId}")
- public
class RelativePathUriTemplateC ontroller { @RequestMapping(value = "/pets/{petId}",method "myParam=myValue")= RequestMethod.GET, params= public void findPet( @PathVariableString @PathVariableownerId, String petId, Model model) { // implementation omitted } - }
headers的样例:
- @Controller
- @RequestMapping("/owners/{ownerId}")
- public
class RelativePathUriTemplateC ontroller { - @RequestMapping(value
= "/pets",method "Referer=http://www.ifeng.com/")= RequestMethod.GET, headers= public void findPet( @PathVariableString @PathVariableownerId, String petId, Model model) { // implementation omitted } - }
http://www.ifeng.com/
”的请求;
上面仅仅介绍了,RequestMapping指定的方法处理哪些请求,下面一篇将讲解怎样处理request提交的数据(数据绑定)和返回的数据。
- @RequestMapping
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- @RequestMapping
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- @RequestMapping
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- RequestMapping
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