【Java从零到架构师第③季】【25】SpringMVC-@RequestMapping_获取请求参数_请求路径变量

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持续学习&持续更新中…

守破离

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@RequestMapping

@RequestMapping用于方法上

@Controller
public class UserController {
   
    @RequestMapping(value = "/addUser", method = RequestMethod.GET)
    @ResponseBody
    public String addUser() {
   
        return "Add Success!";
    }

    @RequestMapping(value = "/removeUser", method = RequestMethod.POST)
    @ResponseBody
    public String removeUser() {
   
        return "Remove Success!";
    }
}

@RequestMapping用于类和方法上

@Controller
@RequestMapping("/skill")
public class SkillController {
   
    /*
        /skill/add
    */
    @RequestMapping("/add")
    @ResponseBody
    public String add() {
   
        return "SkillController - Add Success!";
    }

    /*
        /skill/remove
    */
    @RequestMapping("/remove")
    @ResponseBody
    public String remove() {
   
        return "SkillController - Remove Success!";
    }
}

@GetMapping、@PostMapping

@Controller
public class UserController {
   
    // @RequestMapping(value = "/addUser", method = RequestMethod.GET)
    // 等价于
    @GetMapping("/addUser")
    @ResponseBody
    public String addUser() {
   
        return "Add Success!";
    }

    // @RequestMapping(value = "/removeUser", method = RequestMethod.POST)
    // 等价于
    @PostMapping("/removeUser")
    @ResponseBody
    public String removeUser() {
   
        return "Remove Success!";
    }
}

总结及补充

• 实际开发中，建议严格区分GET、POST请求，而不是像Java②项目那样宽松，无论是GET还是POST都可以获取到数据。

• @RequestMapping、@GetMapping、@PostMapping都可以传入多个URL：

  @Controller
  public class UserController4 {
       
      @GetMapping({
       "/addUser