我在学习Spring MVC时试图理解我的项目代码.
在Spring中,@ RequestMapping注释需要参数.例如,
@RequestMapping(value="/something",method=RequestMethod.POST)
@RequestMapping(value="/index.html",method=RequestMethod.GET)
@RequestMapping("/index")
@RequestMapping(params="command=GETINFO")
我的项目使用注释,它不使用任何XML进行映射.我有一个以下的控制器结构.
@Controller
public class RuleStepController {
private static final String ATTRIBUTE_BRANCH = "branch";
private static final String ATTRIBUTE_EDIT_FORM = "editForm";
.................
@Autowired
private RuleStepService ruleStepService;
@Autowired
private PopulationDao populationDao;
@RequestMapping
public void ruleStepEntForm(Long populationId,ModelMap model) {
.....
editForm.setStepEnt(stepDto);
}
@RequestMapping
public void ruleStepOrgCount(RuleStepOrgSearchForm searchForm,ModelMap model){
.......
model.addAttribute("searchForm",searchForm);
}
@RequestMapping
public String ruleStepMgrForm() {
logger.debug(String.format("ruleStepMgrForm"));
return "forward:/employee/employeeSearchForm.view?relationshipId=0&roleId=0&formId=stepMgr";
}
我想了解@RequestMapping在没有任何参数的情况下有什么意义？
@AutoWired的用途是什么？
>使用注释@RequestMapping,您可以通过多种方式绑定请求参数：
URI模板模式,使用注释@PathVariable
@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";
}
请求参数和标头值
@Controller
@RequestMapping("/owners/{ownerId}")
public class RelativePathUriTemplateController {
@RequestMapping(value = "/pets/{petId}",method = RequestMethod.GET,params = "myParam=myValue")
public void findPet(@PathVariable String ownerId,@PathVariable String petId,Model model) {
// implementation omitted
}
}
使用@RequestParam
@Controller
@RequestMapping("/pets")
@SessionAttributes("pet")
public class EditPetForm {
@RequestMapping(method = RequestMethod.GET)
public String setupForm(@RequestParam("petId") int petId,ModelMap model) {
Pet pet = this.clinic.loadPet(petId);
model.addAttribute("pet",pet);
return "petForm";
}
}
使用@RequestBody注释映射请求正文
@RequestMapping(value = "/something",method = RequestMethod.PUT)
public void handle(@RequestBody String body,Writer writer) throws IOException {
writer.write(body);
}
>自动装配
@Autowired
private RuleStepService ruleStepService;
Spring Container之前创建了bean ruleStepService.如果你需要在你的类中使用这个bean,你只需要如上所述声明,容器会将bean注入你的类.你不需要声明像;
RuleStepService ruleStepService =new RuleStepService().
Container将找到bean名称ruleStepService或bean具有类型RuleStepService(基于配置中的策略)
