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SpringBoot复杂参数应用详细讲解

2024-04-02 19:55

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复杂参数：

Map<String, Object> map
Model model
HttpServletRequest request
HttpServletResponse response

以上复杂参数所携带的数据均可被放在 request 请求域中，其中 Map 与 Model 类型处理方法一致。（本文只介绍使用）

使用方法：

1. controller 类完整代码：

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.Map;
@Controller
public class RequestController {
    @GetMapping("/params")
    public String testParam(Map<String, Object> map,
                            Model model,
                            HttpServletRequest request,
                            HttpServletResponse response){
        map.put("map", "helloMap");
        model.addAttribute("model", "helloModel");
        request.setAttribute("message", "helloMessage");
        Cookie cookie = new Cookie("c1", "v1");
        cookie.setDomain("localhost");
        response.addCookie(cookie);
        return "forward:/success"; // 转发到 /SUCCESS请求
    }
    @ResponseBody
    @GetMapping("/success")
    public Map success(HttpServletRequest request){
        Map<String, Object> map = new HashMap<>();
        Object hello = request.getAttribute("map");
        Object model = request.getAttribute("model");
        Object message = request.getAttribute("message");
        map.put("hello", hello);
        map.put("medol", model);
        map.put("message", message);
        return map;
    }
}

2. 具体解释：