SampleUI项目将有两个屏幕： 用户将输入唯一ID以登录系统。 如果在数据库中找到“用户ID”，则用户将登录。 一旦用户登录，他们将看到秒屏幕。 这个屏幕非常简单。它有四个象限，每个象限都有一个颜色。 当用户选择“旋转”时，颜色顺时针旋转。
我怀疑是旋转的关系，我怎么能在Spring做以下事情：当按下按钮旋转时，使象限旋转的颜色变大？因为我必须每次旋转时一次又一次地重新加载页面，所以我可以向用户显示旋转，我只是不知道该怎么做。这是我目前的代码：
Quadrant.java
package com.Beta.app;
public class Quadrant
{
private String Q1Color;
private String Q2Color;
private String Q3Color;
private String Q4Color;
public Quadrant()
{
Q1Color = "red";
Q2Color = "green";
Q3Color = "yellow";
Q4Color = "blue";
}
public void setQ1Color(String Q1Color)
{
this.Q1Color = Q1Color;
}
public String getQ1Color()
{
return Q1Color;
}
public void setQ2Color(String Q2Color)
{
this.Q2Color = Q2Color;
}
public String getQ2Color()
{
return Q2Color;
}
public void setQ3Color(String Q3Color)
{
this.Q3Color = Q3Color;
}
public String getQ3Color()
{
return Q3Color;
}
public void setQ4Color(String Q4Color)
{
this.Q4Color = Q4Color;
}
public String getQ4Color()
{
return Q4Color;
}
public void rotate()
{
String aux1, aux2, aux3;
aux1 = Q2Color;
Q2Color = Q1Color;
aux2 = Q4Color;
Q4Color = aux1;
aux3 = Q3Color;
Q3Color = aux2;
Q1Color = aux3;
}
}
WebAppController.java
package com.Beta.app;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.ui.ModelMap;
@Controller
public class WebAppController
{
@RequestMapping(value = "/user", method = RequestMethod.GET)
public ModelAndView login()
{
return new ModelAndView("user", "command", new User());
}
@RequestMapping(value = "/rotationPage", method = RequestMethod.POST)
public String rotationPage(@ModelAttribute("SpringWeb")Quadrant quadrant,
ModelMap model)
{
quadrant.rotate();
quadrant.rotate();
model.addAttribute("Q1Color", quadrant.getQ1Color());
model.addAttribute("Q2Color", quadrant.getQ2Color());
model.addAttribute("Q3Color", quadrant.getQ3Color());
model.addAttribute("Q4Color", quadrant.getQ4Color());
return "result";
}
}
result.jsp
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page session="false" %>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html>
<head>
<title>Rotation Page</title>
</head>
<body style = "width:100%; height:100%; margin:0px; padding:0px;">
<div id="center" style = "position: absolute; left: 50%; top: 40%; margin-left:-200px; margin-top:-200px">
<center>
<form>
<input type="submit" value="Save" />
</form>
</center>
<table>
<tr>
<td><div style = "width:200px; height:200px; background-color:${Q1Color}"></div></td>
<td><div style = "width:200px; height:200px; background-color:${Q2Color}"></div></td>
</tr>
<tr>
<td><div style = "width:200px; height:200px; background-color:${Q3Color}"></div></td>
<td><div style = "width:200px; height:200px; background-color:${Q4Color}"></div></td>
</tr>
</table>
<center>
<form>
<p></p>
<input type="submit" value="Rotate" />
</form>
</center>
</div>
</body>
</html>
user.jsp
<%@ page session="false" %>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<html>
<head>
<title>Login Page</title>
</head>
<body style="width:100%; height:100%; margin:0px; padding:0px;">
<div id="page" style="position:absolute; left:40%; top:50%; text-align:center;">
<form:form method="POST" action="/app/rotationPage.html">
<table>
<tr>
<td><form:label path="userId">User Id</form:label></td>
<td><form:input path="userId" /></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="Login"/>
</td>
</tr>
</table>
</form:form>
</div>
</body>
</html>
servlet-context.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
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">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<context:component-scan base-package="com.Beta.app" />
</beans:beans>
----------------------------------------------------------------------------------
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>