java– 在Spring MVC中没有参数的@RequestMapping

概述我在学习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=RequestMetho

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.

@Controllerpublic 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？

最佳答案>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

@autowiredprivate 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) 总结

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