SpringMVC03_模型数据处理-蒲公英云

SpringMVC03_模型数据处理

Bertha 。 2023-02-20 05:00 64阅读 0赞

SpringMVC03_模型数据处理

原生方法：

@RequestMapping(“/request”)
public String request(HttpServletRequest request){

User user = new User();
user.setId(11L);
user.setName("陈十三");
request.setAttribute("user",user);
return "view";

}

注：需要servlet-api依赖

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
    <scope>provided</scope>
</dependency>

SpringMVC框架提供的方法：

@RequestMapping(“/map”)

public String map(Map<String,User> map){ 
    User user = new User();
    user.setId(1L);
    user.setName("张三");
    map.put("user",user);
    return "view";
}
@RequestMapping("/model")
public String model(Model model){ 
    User user = new User();
    user.setId(2L);
    user.setName("李四");
    model.addAttribute("user",user);
    return "view";
}
@RequestMapping("/modelAndView")
public ModelAndView modelAndView(){ 
    User user = new User();
    user.setId(3L);
    user.setName("王五");
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addObject("user",user);
    modelAndView.setViewName("view");
    return modelAndView;
}
@RequestMapping("/modelAndView2")
public ModelAndView modelAndView2(){ 
    User user = new User();
    user.setId(4L);
    user.setName("陈六");
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.addObject("user",user);
    View view = new InternalResourceView("/view.jsp");
    modelAndView.setView(view);
    return modelAndView;
}
@RequestMapping("/modelAndView3")
public ModelAndView modelAndView3(){ 
    User user = new User();
    user.setId(5L);
    user.setName("张七");
    ModelAndView modelAndView = new ModelAndView("view");
    modelAndView.addObject("user",user);
    return modelAndView;
}
@RequestMapping("/modelAndView4")
public ModelAndView modelAndView4(){ 
    User user = new User();
    user.setId(6L);
    user.setName("李八");
    View view = new InternalResourceView("/view.jsp");
    ModelAndView modelAndView = new ModelAndView(view);
    modelAndView.addObject("user",user);
    return modelAndView;
}
@RequestMapping("/modelAndView5")
public ModelAndView modelAndView5(){ 
    User user = new User();
    user.setId(7L);
    user.setName("张九");
    Map<String,User> map = new HashMap<>();
    map.put("user",user);
    ModelAndView modelAndView = new ModelAndView("view",map);
    return modelAndView;
}
@RequestMapping("/modelAndView6")
public ModelAndView modelAndView6(){ 
    User user = new User();
    user.setId(8L);
    user.setName("陈十");
    Map<String,User> map = new HashMap<>();
    map.put("user",user);
    View view = new InternalResourceView("/view.jsp");
    ModelAndView modelAndView = new ModelAndView(view,map);
    return modelAndView;
}
@RequestMapping("/modelAndView7")
public ModelAndView modelAndView7(){ 
    User user = new User();
    user.setId(9L);
    user.setName("许十一");
    ModelAndView modelAndView = new ModelAndView("view","user",user);
    return modelAndView;
}
@RequestMapping("/modelAndView8")
public ModelAndView modelAndView8(){ 
    User user = new User();
    user.setId(10L);
    user.setName("张十二");
    View view = new InternalResourceView("/view.jsp");
    ModelAndView modelAndView = new ModelAndView(view,"user",user);
    return modelAndView;
}

示例：
view.jsp（添加 <%@ page isELIgnored=“false” %> 以开启支持EL语句）：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    ${requestScope.user}
</body>
</html>