SpringBoot Controller

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@Controller处理HTTP请求

@RestController = @Controller + @ResponseBody 处理Rest请求

@RequestMapping 配置URL映射

1、获取请求参数的两种方式

@RestControllerpublic class HelloController {    @Value("${cupSize}")    private String cupSize;    @Value("${age}")    private Integer age;    @Autowired    private GirlProperties girlProperties;        //请求形式1    //  localhost:8082/hello/12    @RequestMapping(value = "/hello/{id}",method = RequestMethod.GET)    public String say(@PathVariable("id") Integer id)    {        return "id:" + id;    }    //请求形式2    //localhost:8082/hello?hi=12    //@RequestMapping(value = "/hi",method = RequestMethod.GET)    @GetMapping(value = {"/hi","hello"})    public String hi(@RequestParam(value = "id",required = false,defaultValue = "0") Integer id)    {        return "id:" + id;    }}

required = false,defaultValue = "0"

表示不必须，缺省值为0

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