@PathVariable和@RequestParm的区别:

@PathVariable是从url地址中取值,
而@RequestParm是从键值对的参数中取值,
都可以为变量名起别名

演示示例

01 从url中获取单个参数

localhost:8999/callback/auth

02 从url中获取多个参数

localhost:8999/callback/45646/body/46546

03 从请求参数中获取值

localhost:8999/callback?auth_code=4546

04 普通的接收get请求参数

localhost:8999/callback/v2?authCode=4546

注意事项:不能为多个get请求赋同一个请求地址,不同rest风格的请求可以,比如post和get可以用同一个地址

演示代码及地址

@RestController
public class CallbackController {
    //01 从url中获取单个参数
    //localhost:8999/callback/auth
    @GetMapping("/callback/{auth_code}")
    public String getValueByUrl(@PathVariable("auth_code") String authCode) {
        String result = "success:" + authCode;
        return result;
    }
    // 02 从url中获取多个参数
    //localhost:8999/callback/45646/body/46546
    @GetMapping("/callback/{auth_code}/body/{state}")
    public String callbackRestTest(@PathVariable("auth_code") String authCode, @PathVariable("state") String state) {
        String result = "success:" + authCode + "," + state;
        return result;
    }
    // 03 从请求参数中获取值
    //localhost:8999/callback?auth_code=4546
    @GetMapping("/callback")
    public String getValueByQueryParams(@RequestParam("auth_code") String authCode) {
        String result = "success:" + authCode;
        return result;
    }
    // 04 普通的接收get请求参数
    //localhost:8999/callback/v2?authCode=4546
    @GetMapping("/callback/v2")
    public String commonGetQuery(String authCode) {
        String result = "success:" + authCode;
        return result;
    }

}