SpringMVC（四）資料模型和@SessionAttributes註解
阿新 • • 發佈：2019-01-06
ModelAndView
//測試處理模型資料ModelAndView
@RequestMapping("testModelAndView")
public ModelAndView testModelAndView(){
ModelAndView modelAndView = new ModelAndView("success");
modelAndView.addObject("time",new Date());
return modelAndView;
}請求路徑：
<a href="testModelAndView">testModelAndView</a>
成功跳轉頁面如下：
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> success!!! <br/> time:${requestScope.time } </body> </html>
頁面輸出如下：
time:Sun Oct 02 22:28:25 CST 2016
Map
<span style="font-size:14px;">//測試處理模型資料Map
@RequestMapping("testMap")
public String testMap(Map<String,Object> map){
map.put("names", Arrays.asList("kaka","sheva","Inzaghi"));
return "success";
}</span>請求路徑：
<a href="testMap">testMap</a>
成功跳轉頁面如下：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
success!!!
<br/>
names:${requestScope.names }
</body>
</html>頁面輸出如下：
names:[kaka, sheva, Inzaghi]
@SessionAttributes註解
headler類
<span style="font-size:12px;"><span style="color:#ff0000;">@SessionAttributes(value = {"player"},types={String.class})</span>
@Controller
public class TestPojo {
//測試SessionAttributes註解用法
@RequestMapping("testSessionAttributes")
public String testSessionAttributes(Map<String,Object> map){
Player p = new Player();
p.setName("kaka");
p.setAge(22);
map.put("player", p);
map.put("team", "milan");
return "success";
}
}
</span>請求路徑：
<a href="testSessionAttributes">testSessionAttributes</a>
跳轉的jsp頁面：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
success!!!
<br/>
request player:${requestScope.player }
<br/>
session player:${sessionScope.player }
<br/>
request team:${requestScope.team }
<br/>
session team:${sessionScope.team }
</body>
</html>頁面輸出結果：
request player:Player [name=kaka, age=22, team=null]
session player:Player [name=kaka, age=22, team=null]
request team:milan
session team:milan