使用Spring MVC 的表单控制器SimpleFormController

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)

使用Spring MVC 的表单控制器SimpleFormController,布布扣,bubuko.com

使用Spring MVC 的表单控制器SimpleFormController

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