springmvc注解之@RequestMapping注解
Posted 吴二喵
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一、基本介绍
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: 指定请求的实际地址,指定的地址可以是URI Template 模式(后面将会说明);
method: 指定请求的method类型, GET、POST、PUT、DELETE等;
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: 指定返回的内容类型,仅当request请求头中的(Accept)类型中包含该指定类型才返回;
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。
二、示例
1、value / method 示例
默认RequestMapping(“….str…”)即为value的值;
@Controller
@RequestMapping("/appointments")
public class AppointmentsController
```
private AppointmentBook appointmentBook;
```
```
@Autowired
public AppointmentsController(AppointmentBook appointmentBook)
this.appointmentBook = appointmentBook;
@RequestMapping(method = RequestMethod.GET)
public Map<String, Appointment> get()
return appointmentBook.getAppointmentsForToday();
@RequestMapping(value="/day", method = RequestMethod.GET)
public Map<String, Appointment> getForDay(@PathVariable @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 add(@Valid 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) 可以指定为含有某变量的一类值(URI Template Patterns with Path Variables);
C) 可以指定为含正则表达式的一类值( URI Template Patterns with Regular Expressions);
@RequestMapping(value="/owners/ownerId", method=RequestMethod.GET)
public String findOwner(@PathVariable String ownerId, Model model)
Owner owner = ownerService.findOwner(ownerId);
model.addAttribute("owner", owner);
return "displayOwner";
@RequestMapping("/spring-web/symbolicName:[a-z-]+-version:\\d\\.\\d\\.\\d.extension:\\.[a-z]")
public void handle(@PathVariable String version, @PathVariable String extension)
```
// ...
```
2 consumes、produces 示例
cousumes的样例:
@Controller
@RequestMapping(value = "/pets", method = RequestMethod.POST, consumes="application/json")
public void addPet(@RequestBody Pet pet, Model model)
```
// implementation omitted
```
produces的样例:
@Controller
@RequestMapping(value = "/pets/petId", method = RequestMethod.GET, produces="application/json")
@ResponseBody
public Pet getPet(@PathVariable 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(value = "/pets/petId", method = RequestMethod.GET, produces="application/json")
@ResponseBody
public Pet getPet(@PathVariable String petId, Model model)
```
// implementation omitted
```
仅处理请求中包含了名为“myParam”,值为“myValue”的请求;
headers的样例:
@Controller
@RequestMapping(value = "/pets/petId", method = RequestMethod.GET, produces="application/json")
@ResponseBody
public Pet getPet(@PathVariable String petId, Model model)
```
// implementation omitted
```
仅处理request的header中包含了指定“Refer”请求头和对应值为“http://www.ifeng.com/”的请求;
转载自:http://blog.csdn.net/walkerjong/article/details/7994326#
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