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SpringMVC域对象共享数据

使用servletAPI向request域对象共享数据

controller如下：

package com.lalala.controller;

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

import javax.servlet.http.HttpServletRequest;

//控制器类
@Controller
public class HelloController {
    @RequestMapping("/")
    public String index(){
        return "index";
    }
    @RequestMapping("/testRequestByServletAPI")
    public String testRequestByServletAPI(HttpServletRequest request){
        request.setAttribute("testRequestScope", "hello, servletAPI");
        return "success";
    }
}

success.html如下：

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
success<br>
<p th:text="${testRequestScope}"></p>
</body>
</html>

使用ModelAndView向request域对象共享数据

controller如下：

package com.lalala.controller;

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

import javax.servlet.http.HttpServletRequest;

//控制器类
@Controller
public class HelloController {
    @RequestMapping("/")
    public String index() {
        return "index";
    }
    @RequestMapping("/testModelAndView")
    public ModelAndView testModelAndView() {
        ModelAndView modelAndView = new ModelAndView();
        //处理模型数据，即向请求域request共享数据
        modelAndView.addObject("testRequestScope", "hello,ModelAndView");
        //设置视图名称
        modelAndView.setViewName("success");
        //必须返回modelAndView
        return modelAndView;
    }
}

success.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
success<br>
<p th:text="${testRequestScope}"></p>
</body>
</html>

使用Model向request域对象共享数据

controller如下：

package com.lalala.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import javax.servlet.http.HttpServletRequest;

//控制器类
@Controller
public class HelloController {
    @RequestMapping("/")
    public String index() {
        return "index";
    }
    @RequestMapping("/testModel")
    public String testModel(Model model){
        model.addAttribute("testRequestScope", "hello model");
        return "success";
    }
}

使用map向request域对象共享数据

controller如下：

package com.lalala.controller;

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

import java.util.Map;

//控制器类
@Controller
public class HelloController {
    @RequestMapping("/")
    public String index() {
        return "index";
    }
    @RequestMapping("/testMap")
    public String testMap(Map<String, Object> map){
        map.put("testRequestScope", "hello,map");
        return "success";
    }
}

使用ModelMap向request域对象共享数据

controller如下：

package com.lalala.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;

import java.util.Map;

//控制器类
@Controller
public class HelloController {
    @RequestMapping("/")
    public String index() {
        return "index";
    }
    @RequestMapping("/testModelMap")
    public String testModelMap(ModelMap modelMap){
        modelMap.addAttribute("testRequestScope", "hello,ModelMap");
        return "success";
    }
}

向session域共享数据

controller如下：

package com.lalala.controller;

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

import javax.servlet.http.HttpSession;

//控制器类
@Controller
public class HelloController {
    @RequestMapping("/")
    public String index() {
        return "index";
    }
    @RequestMapping("/testSession")
    public String testSession(HttpSession session) {
        session.setAttribute("testSessionScope", "hello, session");
        return "success";
    }
}

success.html如下：

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
success<br>
<p th:text="${session.testSessionScope}"></p>
</body>
</html>

向application域共享数据

controller如下：

package com.lalala.controller;

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

import javax.servlet.ServletContext;
import javax.servlet.http.HttpSession;


//控制器类
@Controller
public class HelloController {

    @RequestMapping("/")
    public String index() {
        return "index";
    }
    
    @RequestMapping("/testApplication")
    public String testApplication(HttpSession session) {
        ServletContext servletContext = session.getServletContext();
        servletContext.setAttribute("testApplicationScope", "hello,application");
        return "success";
    }
}

success.html如下：

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
success<br>
<p th:text="${application.testApplicationScope}"></p>
</body>
</html>
posted @ 2021-09-14 13:36  charlatte  阅读(156)  评论(0)  编辑  收藏  举报