以注册过程为例，我们可能会选择继承AbstractController来实现表单的显示,继承AbstractCommandController来实现表单的处理 ，这样是可行的，但必须要维护两个控制器
在这种情况下，我们应该使用SimpleFormController,他接受GET请求时显示表单，接受POST请求时处理表单，如果发生错误，控制器会知道重新显示这个表单，这样用户就可以修改错误，重新提交。
表单对应的POJO
package com.dxz.validator.demo1.mode; 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：
这个base类中还有一个DoSubmitAction()方法，和onSubmit()方法的区别就是后者可以返回一个ModelAndView对象，完成向页面输出数据的功能，而前者不能向页面返回数据，这两个方法同时只有一个有效。
package com.dxz.validator.demo1.action; import org.springframework.validation.BindException; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.SimpleFormController; import com.dxz.validator.demo1.mode.Student; 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定义为register对应我们的表单提交页面register.jsp
successView定义为success对应提交成功的显示页面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>
测试运行，可以看到success.jsp上有我们提交的信息
去-----1 （使用filter处理中文问题）