SpringMVC -- 处理模型数据之ModelAndView / 处理模型数据之Map / 处理模型数据之SessionAttribute (4)
再重新贴一次项目结构吧...
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<!--配置DispatcherServlet-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--配置DispatcherServlet配置文件的路径和文件名-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>WEB-INF/dispatcher-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
springmvc配置文件
dispatcher-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.springmvc.handlers"/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
handler
控制器代码
package com.springmvc.handlers;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;
/**
* Created by cyx on 2016/4/5.
*/
@RequestMapping("/springmvc")
@Controller
public class Main {
private static final String SUCCESS = "success";
/**
* 目标方法的返回值,可以使ModelAndView类型,
* 其中可以包含,视图和模型信息.
* SpringMVC会把ModelAndView 的model 中的数据,存放到request域对象中.
* @return
*/
@RequestMapping("/testModelAndView")
public ModelAndView testModelAndView() {
String viewName = SUCCESS;
ModelAndView modelAndView = new ModelAndView(viewName);
//添加模型数据到ModelAndView中
modelAndView.addObject("time",new Date());
return modelAndView;
}
/**
* 使用Servlet原生API 作为目标方法参数,具体可以支持以下类型.
* 1.HttpServletRequest
* 2.HttpServletResponse
* 3.HttpSession
* 4.java.security.Principal
* 5.Local
* 6.InputStream
* 7.OutputStream
* 8.Reader
* 9.Writer
*
* @param request
* @param response
* @return
*/
@RequestMapping("/testServletAPI")
public String testServletAPI(HttpServletRequest request,HttpServletResponse response) {
System.out.println("testServletAPI request: "+request +" response: "+response);
return SUCCESS;
}
/**
* 测试
* @return
*/
@RequestMapping("/hello")
public String hello() {
System.out.println("hello");
return SUCCESS;
}
}
success.jsp
<%--
Created by IntelliJ IDEA.
User: cyx
Date: 2016/4/5
Time: 13:47
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title></title>
</head>
<body>
<h4>Success Page</h4>
time:${requestScope.time}
</body>
</html>
然后部署运行就OK....
//----------------------------------------------------------------------------------------------------------------------------
继续沿用上一个的Demo....
Handler
Main.java
一些无关的,我就直接删除了..
package com.springmvc.handlers;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Arrays;
import java.util.Date;
import java.util.Map;
/**
* Created by cyx on 2016/4/5.
*/
@RequestMapping("/springmvc")
@Controller
public class Main {
private static final String SUCCESS = "success";
/**
* 目标方法可以添加Map参数
* 实际上也可以是Model类型,或者 ModelMap类型.
* @param map
* @return
*/
@RequestMapping("/testMap")
public String testMap(Map<String, Object> map) {
System.out.println(map.getClass().getName());
map.put("names", Arrays.asList("Tom","Jerry","Mike"));
return SUCCESS;
}
/**
* 目标方法的返回值,可以使ModelAndView类型,
* 其中可以包含,视图和模型信息.
* SpringMVC会把ModelAndView 的model 中的数据,存放到request域对象中.
* @return
*/
@RequestMapping("/testModelAndView")
public ModelAndView testModelAndView() {
String viewName = SUCCESS;
ModelAndView modelAndView = new ModelAndView(viewName);
//添加模型数据到ModelAndView中
modelAndView.addObject("time",new Date());
return modelAndView;
}
}
<%--
Created by IntelliJ IDEA.
User: cyx
Date: 2016/4/5
Time: 13:39
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title></title>
</head>
<body>
<a href="springmvc/testMap">Test Map</a>
<br><br>
<a href="springmvc/testModelAndView">Test ModelAndView</a>
<br><br>
<a href="springmvc/testServletAPI">Test ServletAPI</a>
<br><br>
<a href="springmvc/hello">Hello</a>
</body>
</html>
success.jsp
<%--
Created by IntelliJ IDEA.
User: cyx
Date: 2016/4/5
Time: 13:47
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title></title>
</head>
<body>
<h4>Success Page</h4>
time:${requestScope.time}
<br><br>
names:${requestScope.names}
<br><br>
</body>
</html>
部署运行即可.....
//---------------------------------------------------------------------------------------------------------------------------------------------
沿用之前的Demo....
Handler
Main.java
package com.springmvc.handlers;
import com.springmvc.model.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.SessionAttributes;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Arrays;
import java.util.Date;
import java.util.Map;
/**
* Created by cyx on 2016/4/5.
*/
@SessionAttributes(value = {"user"} ,types = {String.class})
@RequestMapping("/springmvc")
@Controller
public class Main {
private static final String SUCCESS = "success";
/**
* @SessionAttributes除了可以通过属性名指定需要方法会话中的属性外(value属性值),
* 还可以通过模型属性的对象类型 指定哪些模型属性需要放到会话中(type属性值).
*
* @SessionAttributes 这个注解中,既放了键,又放了类型,如果向Map中添加String类型,也会将String 放入session中
*
* 注意: @SessionAttributes 注解 只能放在类上面,而不能放在方法上面.
*
* @param map
* @return
*/
@RequestMapping("/testSessionAttributes")
public String testSessionAttributes(Map<String ,Object> map) {
User user = new User("Tom","123456","[email protected]",22);
map.put("user", user);
map.put("school", "Wisedu");
return SUCCESS;
}
/**
* 目标方法可以添加Map参数
* 实际上也可以是Model类型,或者 ModelMap类型.
* @param map
* @return
*/
@RequestMapping("/testMap")
public String testMap(Map<String, Object> map) {
System.out.println(map.getClass().getName());
map.put("names", Arrays.asList("Tom","Jerry","Mike"));
return SUCCESS;
}
/**
* 目标方法的返回值,可以使ModelAndView类型,
* 其中可以包含,视图和模型信息.
* SpringMVC会把ModelAndView 的model 中的数据,存放到request域对象中.
* @return
*/
@RequestMapping("/testModelAndView")
public ModelAndView testModelAndView() {
String viewName = SUCCESS;
ModelAndView modelAndView = new ModelAndView(viewName);
//添加模型数据到ModelAndView中
modelAndView.addObject("time",new Date());
return modelAndView;
}
}
success.jsp
<%--
Created by IntelliJ IDEA.
User: cyx
Date: 2016/4/5
Time: 13:47
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title></title>
</head>
<body>
<h4>Success Page</h4>
time:${requestScope.time}
<br><br>
names:${requestScope.names}
<br><br>
request user :${requestScope.user}
<br><br>
session user :${sessionScope.user}
<br><br>
request school :${requestScope.school}
<br><br>
session school :${sessionScope.school}
<br><br>
</body>
</html>
index.jsp
<%--
Created by IntelliJ IDEA.
User: cyx
Date: 2016/4/5
Time: 13:39
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title></title>
</head>
<body>
<a href="springmvc/testSessionAttributes">Test SessionAttributes</a>
<br><br>
<a href="springmvc/testMap">Test Map</a>
<br><br>
<a href="springmvc/testModelAndView">Test ModelAndView</a>
<br><br>
<a href="springmvc/testServletAPI">Test ServletAPI</a>
<br><br>
<a href="springmvc/hello">Hello</a>
</body>
</html>
然后部署运行即可....
这个是不用SessionAttribute注解标签....说明,user并没有存放在session中.
使用sessionAttribute注解,将User添加至Session中......
这个是在SessionAttribute注解中,使用类型 这个属性....
设置SessionAttribute标签中的Types属性为String之后......
如果向Map中添加String类型,也会将String 放入session中
