【SpringMVC学习笔记】2.常用注解Ⅰ

转发与重定向

转发到页面默认的选项
重定向到页面 redirect:path
转发到另一个控制器 forward:path

HelloController.java

package com.cyk.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/hello")
public class HelloController {

    //转发
    @RequestMapping("/forward")
    public String forward(Model model){
        //springmvc model默认在请求域中存储值
        System.out.println("转发");
        model.addAttribute("skill","睡觉");
        return "forward";
    }

    //重定向
    @RequestMapping("/redirect")
    public String redirect(Model model){
        model.addAttribute("skill","煮饭");
        System.out.println("重定向");
        //不带斜杠的写法是一个相对路径，根据当前上下文决定。hello
        //如果是重定向，就跟视图解析的规则无关
        return "redirect:/jsp/redirect.jsp";
    }

    @RequestMapping("/forward2")
    public String forwardAnotherController(){
        return "forward:/baby/hello";
    }

}

BabyController.java

package com.cyk.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/baby")
public class BabyController {

    @RequestMapping("/hello")
    public String greeting(){
        System.out.println("baby hello");
        return "forward";
    }
}