今日总结

今天主要学习springmvc;今天首先学习了如何获取请求头和cookie,以及一些注解相关的原理

如下图所示，我们获取到了网页的请求头的host 

 示例

package com.aurora.header;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@ResponseBody
@RequestMapping("header")
public class HeaderController {

    @GetMapping("data")
    public String data(@RequestHeader("Host") String host){
        System.out.println("host = " + host);
        return "host = " + host;
    }
}

package com.aurora.Cookie;

import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("cookie")
@ResponseBody
public class CookieController {

    @RequestMapping("data")
    public String data(@CookieValue(value = "cookieName") String value){
        System.out.println("value = " + value);
        return value;
    }

    @GetMapping("save")
    public String save(HttpServletResponse response){
        Cookie cookie = new Cookie("cookieName","root");
        response.addCookie(cookie);
        return "ok";
    }
}