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以用户注冊过程为例。我们可能会选择继承AbstractController来实现表单的显示。
1、导入spring-framework-2.5.6的jar包，详见第八天
框架之痛-Spring MVC(一）。
2、编写web.xml 的配置文件。主要增加spring Web MVC框架提供的
org.springframework.web.filter.CharacterEncodingFilter用于解决POST方式造成的中文乱码问题。
<?
xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>myOneMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>myOneMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
3、myOneMVC-servlet.xml文件配置
<?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-2.5.xsd">
<bean name="/reg" class="edu.eurasia.controller.RegControl"></bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
4、后端控制器RegControl.java
package edu.eurasia.controller;
import org.springframework.validation.BindException;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
public class RegControl extends SimpleFormController {
public RegControl() {
setCommandClass(User.class);
}
@Override
protected ModelAndView onSubmit(Object object, BindException errors)
throws Exception {
User user=(User)object;
ModelAndView mav = new ModelAndView("hello");
mav.addObject("user", user);
return mav;
}
}
RegControl.java继承SimpleFormController类，构造器中调用setCommandClass方法绑定定命令对象（这里为User类），转换object为User类进行业务逻辑操作。onSubmit()方法能够返回一个ModelAndView对象，完毕向页面输出数据的功能。
5、表单相应的POJO-User.java
package edu.eurasia.controller;
public class User {
private String username;
private int age;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
6、表单填写页面index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="reg" method="post">
用户名：<input type="text" name="username"><br/>
年龄：<input type="text" name="age"><br/>
<input type="submit">
</form>
</body>
</html>
7、返回一个对应的给client页面hello.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
Brazil世界杯，你好！<br/>
用户名：${user.username }<br/>
年龄：${user.age }
</body>
</html>
8、执行Tomcat 7 。输入http://localhost:8080/springMVC_controllerweb_1/index.jsp
项目结构图
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时间： 2024-10-01 20:58:12