在定义一个Rest接口时通常会利用GET、POST、PUT、DELETE来实现数据的增删改查;这几种方式有的需要传递参数,后台开发人员必须对接收到的参数进行参数验证来确保程序的健壮性
1、@PathVaribale 获取url中的数据
请求URL:localhost:8080/hello/id 获取id值
实现代码如下:
@RestController publicclass HelloController { @RequestMapping(value="/hello/{id}/{name}",method= RequestMethod.GET) public String sayHello(@PathVariable("id") Integer id,@PathVariable("name") String name){ return"id:"+id+" name:"+name; } }
在浏览器中 输入地址:
localhost:8080/hello/100/hello
输出:
id:81name:hello
2、@RequestParam 获取请求参数的值
获取url参数值,默认方式,需要方法参数名称和url参数保持一致
请求URL:localhost:8080/hello?id=1000
@RestController publicclass HelloController { @RequestMapping(value="/hello",method= RequestMethod.GET) public String sayHello(@RequestParam Integer id){ return"id:"+id; } }
输出:
id:100
url中有多个参数时,如:
localhost:8080/hello?id=98&&name=helloworld
具体代码如下:
@RestController publicclass HelloController { @RequestMapping(value="/hello",method= RequestMethod.GET) public String sayHello(@RequestParam Integer id,@RequestParam String name){ return"id:"+id+ " name:"+name; } }
获取url参数值,执行参数名称方式
localhost:8080/hello?userId=1000
@RestController publicclass HelloController { @RequestMapping(value="/hello",method= RequestMethod.GET) public String sayHello(@RequestParam("userId") Integer id){ return"id:"+id; } }
输出:
id:100