SpringBoot:请求参数与基本注解

@PathVariable：路径变量 （可以放到map中）

@RequestHeader：获取请求头（可以放到map中）

@ModelAttribute：获取request域属性

@RequestParam：获取请求参数（可以放到map中）

@MatrixVariable：矩阵变量

@CookieValue：获取cookie值

@RequestBody获取请求体

@RestController
public class ParameterTestController {


    //  http://127.0.0.1:8080/car/2/owner/zhangsan?age=15&inters=&inters=
    @GetMapping("/car/{id}/owner/{username}")
    public Map<String,Object> getCar(@PathVariable("id") Integer id,
                                     @PathVariable("username") String name,
                                     @PathVariable Map<String,String> pv,
                                     @RequestHeader("User-Agent") String userAgent,
                                     @RequestHeader Map<String,String> header,
                                     @RequestParam("age") Integer age,
                                     @RequestParam("inters") List<String> inters,
                                     @RequestParam Map<String,String> params,
                                     @CookieValue("_ga") String _ga,
                                     @CookieValue("_ga") Cookie cookie){


        Map<String,Object> map = new HashMap<>();

        map.put("id",id);
        map.put("name",name);
        map.put("pv",pv);
        map.put("userAgent",userAgent);
        map.put("headers",header);
        map.put("age",age);
        map.put("inters",inters);
        map.put("params",params);

=========equestBody@R获取post请求的请求体=========== 
   @PostMapping("/save")
    public Map postMethod(@RequestBody String content){
        Map<String,Object> map = new HashMap<>();
        map.put("content",content);
        return map;
    }

==========@RequestAttribute获取request域中============
    @RequestMapping("/goto")
    public String goTo(HttpServletRequest request){
        request.setAttribute("msg","哈哈哈");
        return "forward:/success";   //转发扫success请求
    }
    @ResponseBody
    @RequestMapping("/success")
    public Map success(@RequestAttribute("msg") String msg,
                       HttpServletRequest request){
        Object msg1 = request.getAttribute("msg");
        String msg2 = msg;
        Map<String,Object> map = new HashMap<>();
        map.put("request_msg",msg1);
        map.put("Param",msg2);
        return map;
    } 
        map.put("_ga",_ga);
        System.out.println(cookie.getName()+"===>"+cookie.getValue());
        return map;
    }

==============@MatrixVariable===================
    //1、语法： 请求路径：/cars/sell;low=34;brand=byd,audi,yd
    //2、SpringBoot默认是禁用了矩阵变量的功能
    //      手动开启：原理。对于路径的处理。UrlPathHelper进行解析。
    //              removeSemicolonContent（移除分号内容）支持矩阵变量的
    //3、矩阵变量必须有url路径变量才能被解析
    @GetMapping("/cars/{path}")
    public Map carsSell(@MatrixVariable("low") Integer low,
                        @MatrixVariable("brand") List<String> brand,
                        @PathVariable("path") String path){
        Map<String,Object> map = new HashMap<>();

        map.put("low",low);
        map.put("brand",brand);
        map.put("path",path);
        return map;
    }

    // /boss/1;age=20/2;age=10

    @GetMapping("/boss/{bossId}/{empId}")
    public Map boss(@MatrixVariable(value = "age",pathVar = "bossId") Integer bossAge,
                    @MatrixVariable(value = "age",pathVar = "empId") Integer empAge){
        Map<String,Object> map = new HashMap<>();

        map.put("bossAge",bossAge);
        map.put("empAge",empAge);
        return map;

    }

}

 Servlet Api