Controller的使用

Posted 2022-09-28 zfyyfw

@Controller：用于处理http请求的

@RequestMapping：用于配置url映射

 

　　Controller接受参数

　　接受普通参数

　　

    <form action="user/login.do" method="post">
        账号：<input type="text" name="name"/><br />
        密码：<input type="text" name="password"/><br />
            <input type="submit" value="登录" />
    </form>

@Controller
@RequestMapping("user")
public class UserController 

    @RequestMapping("login.do")
    public String login(User user) 　　　//User为实体类，可以直接用属性接受
        System.out.println(user.getName());
        System.out.println(user.getPassword());
        return "index";
    

 

　　接受日期参数

<form action="user/login.do" method="post">
        日期：<input type="text" name="date"/><br />
            <input type="submit" value="查看" />
    </form>

@RequestMapping("login.do")
    public String login(Date date) 
        System.out.println(date);
        return "index";
    
@InitBinder
    public void initBinder(ServletRequestDataBinder binder) 
        binder.registerCustomEditor(Date.class,new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true));
    

 

　　Controller数据保存

　　保存至request里

　　(1)ModelAndView

@RequestMapping("list.do")
    public ModelAndView list() 
        ModelAndView mv=new ModelAndView();
        mv.addObject("name","hu");    //保存数据
        mv.setViewName("index2");    //跳转页面
        return mv;
    

　　(2)Model

@RequestMapping("list.do")
    public String list(Model model) 
        model.addAttribute("name","zhu");
        return "index2";
    

　　(3)map

@RequestMapping("list.do")
    public String list(Map<String,Object> map) 
        map.put("name","sheng");
        return "index2";
    

　　(4)request

@RequestMapping("list.do")
    public String list(HttpServletRequest request) 
        request.setAttribute("name","wang");
        return "index2";
    

 

　　保存至session里

　　

    @RequestMapping("list.do")
    public String list(HttpSession session) 
        session.setAttribute("name","wang");
        return "index2";
    

 

　　保存至application里

@RequestMapping("list.do")
    public String list(HttpSession session) 
        session.getServletContext().setAttribute("name","wang");
        return "index2";
    

 

　　Controller重定向跳转

@RequestMapping("photo.do")
    public String photo() 
        return "redirect:photo1.do";