springmvc之@PathVariable注解

@PathVariable 可以将URL中占位符绑定到控制器处理方法中

url请求过去

//<a href = "demo/demo2/${id}"></a>
<a href = "demo/demo2/1"></a>

action

@requestMapping(value="demo/demo/{id}")
public String demo(@PathVariable("id") Integer id){
    system.out.println(id);
}