1.请求域request

1.1pom.xml

        <!-- web场景jar包       -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- 热部署   -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <!-- 配置文件自定义bean数据提示等     -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <!-- get()、set()、toString、slf4j等     -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <!-- 测试包@Test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- 将js以jar包形式导入项目，比如：[http://localhost:8081/webjars/**jquery/3.5.1/jquery.js**]-->
        <dependency>
            <groupId>org.webjars</groupId>
            <artifactId>jquery</artifactId>
            <version>3.5.1</version>
        </dependency>

1.2controller

@Controller
public class RequestController {

    //获取request域中的属性数据，HttpServletRequest设置数值，RequestAttribute注解获取数值。通常前端通过el表达式获取
    @GetMapping("/goto")
    public String goToPage(HttpServletRequest httpServletRequest){
        httpServletRequest.setAttribute("msg","成功了..");
        httpServletRequest.setAttribute("encoding",200);
        return "forward:/success";
    }

    @ResponseBody
    @GetMapping("/success")
    public HashMap getRequest(@RequestAttribute("msg") String msg,
                             @RequestAttribute("encoding") String encoding,
                             HttpServletRequest httpServletRequest){
        Object httpMsg = httpServletRequest.getParameter("msg");
        Object httpEncoding = httpServletRequest.getParameter("encoding");
        System.out.println(httpMsg+" || "+httpEncoding);
        HashMap<String,Object> map = new HashMap<>();
        map.put("msg",msg);
        map.put("encoding",encoding);
        return map;
    }
}

forward:/success：重定向路径并返回告知浏览器success的路径

HttpServletRequest：设置请求域中属性数值

@RequestAttribute：获取请求域中属性的数值

1.3接口测试结果展示

2.路径域

(1).路径传参变量值

1).controller

    @GetMapping("/car/{id}/onwer/{name}")
    public Map getCarResult(@PathVariable("id") Integer id,
                            @PathVariable("name") String name,
                            @PathVariable HashMap<String,String> hm,

                            @RequestHeader("User-Agent") String userAgent,
                            @RequestHeader HashMap<String,String> ua,

                            @RequestParam("age") Integer age,
                            @RequestParam("inters") List<String> inters,
                            //HashMap特性，无序，key唯一
                            @RequestParam HashMap<String,String> parmes

//                           ,@CookieValue("_ga") String _ga,  //记得浏览器别屏蔽cookie
//                            @CookieValue("_ga") Cookie cookie
                            ){
        HashMap<String,Object> map = new HashMap<>();
        map.put("id",id);
        map.put("name",name);
        map.put("hm",hm);
        map.put("userAgent",userAgent);
        map.put("ua",ua);

//        System.out.println(cookie.getName()+" || "+cookie.getValue());
        return map;
    }

localhost:8080/car/3/onwer/zhangsan/?age=18&inters=basketball&inters=vallball
@PathVariable：获取路径变量数据。
@RequestHeader：获取请求头参数数据。
@RequestParam：获取请求参数数据。
@CookieValue：获取cookie值。

2)接口测试结果展示

(2).表单提交

1).controller

    //from表单提交，获取表单数据。RequestBody
    @PostMapping("/save")
    public Map getPostMethod(@RequestBody String content){
        HashMap<String,Object> map = new HashMap<>();
        map.put("content",content);
        return map;
    }

@PostMapping：post请求

@RequestBody：接收传递的请求体，json字符串中的全部数据。通常与@RequestParam注解使用

2)接口测试结果展示

(3).矩阵变量

?1)config

public class WebConfig implements WebMvcConfigurer {

    //方法2
    @Bean
    public WebMvcConfigurer webMvcConfigurer(){
        return new WebMvcConfigurer() {
            @Override
            public void configurePathMatch(PathMatchConfigurer configurer) {
                UrlPathHelper urlPathHelper = new UrlPathHelper();
                //设置为不移除分号后边的内容,矩阵变量生效
                urlPathHelper.setRemoveSemicolonContent(false);
                configurer.setUrlPathHelper(urlPathHelper);
            }
        };
    }
}

SpringBoot默认禁用使用矩阵变量的功能，需要手动开启。定义配置类，注入开启了矩阵变量使用的组件bean到容器中。

2)controller

第一种传参方式

//矩阵变量语法，把cookie的值以矩阵变量方式进行传递

http://localhost:8081/car/sell;brand=byd;color=blue,red,yellow

    //矩阵变量，第一种传参方式
    @GetMapping("car/{path}")
    public Map getMetrixVariable(@MatrixVariable("brand") String brand,
                                 @MatrixVariable("color")List<String> color,

                                 @PathVariable("path") String path){
        HashMap<String,Object> map = new HashMap<>();
        map.put("brand",brand);
        map.put("color",color);
        map.put("path",path);
        return map;
    }

第二种传参方式

http://localhost:8081/car/zhangsan;age=10/lisi;age=20

    //矩阵变量，第二种传参方式
    @GetMapping("car/{boss}/{emp}")
    public Map getMoreMetrixVariable(//获取路径boss下的age值
                                     @MatrixVariable(value = "age",pathVar = "boss") Integer bossAge,
                                     //获取路径emp下的age值
                                     @MatrixVariable(value = "age",pathVar = "emp") Integer empAge){

        HashMap<String,Object> map = new HashMap<>();
        map.put("bossAge",bossAge);
        map.put("empAge",empAge);
        return map;
    }

@MatrixVariable：矩阵变量获取数值