以注冊過程為例，我們可能會選擇繼承AbstractController來實現表單的顯示,繼承AbstractCommandController來實現表單的處理 ，這樣是可行的，但必須要維護兩個控制器
在這種情況下，我們應該使用SimpleFormController,他接受GEt請求時顯示表單，接受POST請求時處理表單，如果發生錯誤，控制器會知道重新顯示這個表單，這樣用戶就可以修改錯誤，重新提交
表單對應的POJO
package model;
public class Student ...{
private String name;
private String sex;
public String getName() ...{
return name;
}
public void setName(String name) ...{
this.name = name;
}
public String getSex() ...{
return sex;
}
public void setSex(String sex) ...{
this.sex = sex;
}
}
控制器：
這個base類中還有一個DoSubmitAction()方法，和onSubmit()方法的區別就是後者可以返回一個ModelAndView對象，完成向頁面輸出數據的功能，而前者不能向頁面返回數據，這兩個方法同時只有一個有效
package Action;
import model.Student;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
public class RegisterStudentController extends SimpleFormController ...{
public RegisterStudentController()...{
this.setCommandClass(Student.class);
}
protected ModelAndView onSubmit(Object object, BindException arg1) throws Exception ...{
Student stu=(Student)object;
return new ModelAndView(getSuccessView(),"student",stu);
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/train-service.xml,/WEB-INF/train-data.xml,/WEB-INF/train-servlet.xml</param-value>
</context-param>
<servlet>
<servlet-name>train</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>train</servlet-name>
<url-pattern>*.mvc</url-pattern>
</servlet-mapping>
<filter>
<filter-name>character</filter-name>
<filter-class>Action.CharacterFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>character</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
train-servlet.xml
formView定義為register對應我們的表單提交頁面register.jsp
successView定義為success對應提交成功的顯示頁面success.jsp
<bean id="RegisterStudentController" class="Action.RegisterStudentController">
<property name="formView">
<value>register</value>
</property>
<property name="successView">
<value>success</value>
</property>
</bean>
<bean id="simpleUrlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key="/home.mvc">HomeController</prop>
<prop key="/register.mvc">RegisterStudentController</prop>
</props>
</property>
</bean>
register.jsp: <%...@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%...
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="<%=request.getContextPath() %>/register.mvc" method="post">
name:<input type="text" name="name"/></br>
sex:<input type="text" name="sex"/></br>
<input type="submit" value="submit"/>
</form>
</body>
</html>
success.jsp <%...@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%...
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
${student.name}-----${student.sex} <br>
</body>
</html>
測試運行，可以看到success.jsp上有我們提交的信息
去-----1 （使用filter處理中文問題）
