Eclipse环境下 spring MVC 入门实例

实现一个spring 的登陆事例

1.在eclipse下新建动态网页工程springmvc

2.需要导入jar包.

aopalliance.jar;commons-beanutils.jar;commons-collections.jar;commons-dbcp.jar;commons-digester.jar;

commons-lang.jar;commons-logging.jar;commons-pool.jar;commons-validator.jar;freemarker.jar;jaxen-1.1-beta-7.jar;

jstl.jar;junit.jar;log4j-1.2.13.jar;servlet-api.jar;spring.jar;spring-aspects.jar;spring-mock.jar;spring-web.jar

standard.jar;xalan.jar;xercesImpl.jar;xml-apis.jar

3.修改web.xml


<?xml version="1.0" encoding="UTF-8"?>


<web-app id="WebApp_ID" 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">

<display-name>


springmvc</display-name>


<servlet>


<servlet-name>Dispatcher</servlet-name>


<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>





<init-param>


<param-name>contextConfigLocation</param-name>


<param-value>/WEB-INF/Config.xml</param-value>


</init-param>


</servlet>





<servlet-mapping>


<servlet-name>Dispatcher</servlet-name>


<url-pattern>*.do</url-pattern>


</servlet-mapping>





<jsp-config>


<taglib>


<taglib-uri>http://java.sun.com/jstl/core_rt</taglib-uri>


<taglib-location>/WEB-INF/tlds/c.tld</taglib-location>


</taglib>


</jsp-config>


</web-app>



其中jsp-config 定义引用c.tld标签,所以需要在WEB-INF目录下新建tlds目录后拷贝c.tld到tlds目录下.

4.对应 <param-value>/WEB-INF/Config.xml</param-value>在WEB-INF下新建Config.xml


<?xml version="1.0" encoding="UTF-8"?>


<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">




<beans>


<bean id="viewResolver"


class="org.springframework.web.servlet.view.InternalResourceViewResolver">


<property name="viewClass">


<value>


org.springframework.web.servlet.view.JstlView


</value>


</property>





<property name="prefix">


<value>/WEB-INF/view/</value>


</property>





<property name="suffix">


<value>.ftl</value>


</property>





</bean>








<bean id="urlMapping"


class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">


<property name="mappings">


<props>


<prop key="/login.do">LoginAction</prop>


</props>


</property>


</bean>





<bean id="LoginAction"


class="net.oscar.action.LoginAction">


<property name="commandClass">


<value>net.oscar.action.LoginInfo</value>


</property>





<property name="fail_view">


<value>loginfail</value>


</property>





<property name="success_view">


<value>main</value>


</property>


</bean>


</beans>



5.在工程的src下新建Config.xml用到的net.oscar.action.LoginAction和net.oscar.action.LoginInfo的类


package net.oscar.action;






public class LoginInfo ...{


private String username;


private String password;




public String getUsername() ...{


return username;


}




public void setUsername(String username) ...{


this.username = username;


}




public String getPassword() ...{


return password;


}




public void setPassword(String password) ...{


this.password = password;


}


}




package net.oscar.action;




import java.util.HashMap;


import java.util.LinkedList;


import java.util.List;




import org.springframework.validation.BindException;


import org.springframework.web.servlet.ModelAndView;


import org.springframework.web.servlet.mvc.SimpleFormController;






public class LoginAction extends SimpleFormController...{


private String fail_view;


private String success_view;







protected ModelAndView onSubmit(Object cmd,BindException ex)throws Exception...{


LoginInfo loginInfo=(LoginInfo)cmd;




if(login(loginInfo)==0)...{


HashMap result_map=new HashMap();


result_map.put("logininfo", loginInfo);





List msgList=new LinkedList();


msgList.add("msg1");


msgList.add("msg2");


msgList.add("msg3");


result_map.put("messages", msgList);





return new ModelAndView(this.getSuccess_view(),result_map);




}else...{


return new ModelAndView(this.getFail_view());


}





}







private int login(LoginInfo loginInfo)...{




if("oscar".equalsIgnoreCase(loginInfo.getUsername())&&"123456".equals(loginInfo.getPassword()))...{


return 0;


}


return 1;





}




public String getFail_view() ...{


return fail_view;


}




public void setFail_view(String fail_view) ...{


this.fail_view = fail_view;


}




public String getSuccess_view() ...{


return success_view;


}




public void setSuccess_view(String success_view) ...{


this.success_view = success_view;


}


}



6.改动index.html文件(在WebContent目录下)


<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">


<html>


<head>




<title>Insert title here</title>


</head>


<body>


<form method="post" action="login.do">


<p align="center">登录</p>


<br>


用户名:


<input type="text" name="username">


<br>


密  码:


<input type="password" name="password">


<br>


<p>


<input type="submit" value="提交" name="B1">


<input type="reset" value="重置" name="B2">


</p>


</form>


</body>


</html>

7.在WEB-INF下新建view目录用于存放jsp文件,loginfail.jsp和main.jsp

main.jsp




<%...@ page language="java" contentType="text/html; charset=ISO-8859-1"


pageEncoding="ISO-8859-1"%>




<%...@taglib prefix="c" uri="http://java.sun.com/jstl/core_rt"%>




<html>


<head>






</head>


<body>


<p>Login Success!!!</p>





<p>Current User:


<c:out value="${logininfo.username}"/><br>


</p>





<p>Your Current messages:</p>


<c:forEach items="${messages}"


var="item"


begin="0"


end="9"


step="1"


varStatus="var">


<c:if test="${var.index%2==0}" >


*


</c:if>


${item}<br>


</c:forEach>


</body>


</html>

loginfail.jsp




<%...@ page language="java" contentType="text/html; charset=ISO-8859-1"


pageEncoding="ISO-8859-1"%>


<!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=ISO-8859-1">


<title>Insert title here</title>


</head>


<body>


Login fail!


</body>


</html>



大功告成!在index.html中输入用户名:oscar 密码:123456就可以登陆了.