SpringMvc---使用session将数据传输到页面上

1、先放上接收数据的jsp页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>$Title$</title>
  </head>
  <body>
  原生的：${type}
  Hello ${requestScope.type}.
  Hello ${sessionScope.type}.
  </body>
</html>

2、通过servlet去读取session

2.1、普通方式传递数据

@RequestMapping("/servletApi/session")
public String session01(HttpSession session){
    session.setAttribute("type","servletApi-session");
    return "main";
}

2.2、使用Autowired的方式传递数据（推荐使用）

@Autowired
private HttpSession session;

@RequestMapping("/autowired/session")
public String session02(){
    session.setAttribute("type","autowired-session");
    return "main";
}

3、通过springMvc提供的注解去读取session

3.1、@SessionAttributes

@SessionAttributes("type")
public class DAMController {
	@RequestMapping("/modelAndView")
    public ModelAndView map(){
        ModelAndView modelAndView = new ModelAndView("main");
        modelAndView.addObject("type","modelAndView");
        return modelAndView;
    }
}

3.2、@SessionAttribute

@RequestMapping("/annotation/session")
public String session03(value = "type",required = false) String type){
    System.out.println(type);
    return "main";
}

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