1.获取连接中的参数,使用倒的关键词@PathVariable

@RestController public class HelloController {

@RequestMapping(value = "/hello/{id}",method = RequestMethod.GET)
public String index(@PathVariable("id") Integer id){
    return "id="+id;
}

}

启动项目访问，成功获取到id

也可以把id放在/hello前面

public class HelloController {

    @RequestMapping(value = "/{id}/hello",method = RequestMethod.GET)
    public String index(@PathVariable("id") Integer id){
        return "id="+id;
    }

}

2.传统的问号(?id=110)传值，设置id可以不传默认值为0，使用倒的关键词@RequestParam

public class HelloController {

    @RequestMapping(value = "/hello",method = RequestMethod.GET)
    public String index(@RequestParam(value = "id" ,required = false, defaultValue = "0") Integer id){
        return "id="+id;
    }

}

不传参数默认为0

传参数为获取到的参数