Spring從2.5版本開始在編程中引入註解，用戶可以使用@RequestMapping， @RequestParam， @ModelAttribute等等這樣類似的註解。到目前爲止，Spring的版本雖然發生了很大的變化，但註解的特性卻是一直延續下來，並不斷擴展，讓廣大的開發人員的雙手變的更輕鬆起來，這都離不開Annotation的強大作用，今天我們就一起來看看Spring MVC 4中常用的那些註解吧。
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<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="org.springframework.samples.petclinic.web"/>
<!-- ... --></beans>
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@Controller@RequestMapping("/favsoft")
public class AnnotationController {
@RequestMapping(method=RequestMethod.GET)
public String get(){
return "";
}
@RequestMapping(value="/getName", method = RequestMethod.GET)
public String getName(String userName) {
return userName;
}
@RequestMapping(value="/{day}", method=RequestMethod.GET)
public String getDay(Date day){
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
return df.format(day);
}
@RequestMapping(value="/addUser", method=RequestMethod.GET)
public String addFavUser(@Validated FavUser favUser,BindingResult result){
if(result.hasErrors()){
return "favUser";
}
//favUserService.addFavUser(favUser);
return "redirect:/favlist";
}
@RequestMapping("/test")
@ResponseBody
public String test(){
return "aa";
}
} |
String findOwner( String , Model model) {
FavUser favUser = favUserService.findFavUser();
model.addAttribute(
;
}
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@RequestMapping(value="/owners/{ownerId}/pets/{petId}", method=RequestMethod.GET)public String findPet(@PathVariable String ownerId, @PathVariable String petId, Model model) {
Owner owner = ownerService.findOwner(ownerId);
Pet pet = owner.getPet(petId);
model.addAttribute("pet", pet); return "displayPet";
}
@RequestMapping(value = "/something", method = RequestMethod.PUT)public void handle(@RequestBody String body, Writer writer) throws IOException {
writer.write(body);
}
@RequestMapping(value = "/something", method = RequestMethod.PUT)@ResponseBodypublic String helloWorld() { return "Hello World";
}
@RequestMapping("/something")public ResponseEntity<String> handle(HttpEntity<byte[]> requestEntity) throws UnsupportedEncodingException {
String requestHeader = requestEntity.getHeaders().getFirst("MyRequestHeader")); byte[] requestBody = requestEntity.getBody(); // do something with request header and body
HttpHeaders responseHeaders = new HttpHeaders();
responseHeaders.set("MyResponseHeader", "MyValue"); return new ResponseEntity<String>("Hello World", responseHeaders, HttpStatus.CREATED);
}
@ModelAttribute
public Account addAccount(@RequestParam String number) {
return accountManager.findAccount(number);
}
@ModelAttribute
public void populateModel(@RequestParam String number, Model model) {
model.addAttribute(accountManager.findAccount(number));
// add more ...
}