springMVC框架简单登录实例.docx

springMVC框架简单登录实例.docx

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springMVC框架简单登录实例

本次工程结构图

Spring1视图层.jsp

login.jsp

<%@pagelanguage="java"import="java.util.*"pageEncoding="utf-8"%>

<%

Stringpath=request.getContextPath（）;

StringbasePath=request.getScheme（）+":

//"+request.getServerName（）+":

"+request.getServerPort（）+path+"/";

%>

DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01Transitional//EN">

">

--

-->

用户名：

密码：

error.jsp

<%@pagelanguage="java"import="java.util.*"pageEncoding="utf-8"%>

<%

Stringpath=request.getContextPath（）;

StringbasePath=request.getScheme（）+":

//"+request.getServerName（）+":

"+request.getServerPort（）+path+"/";

%>

DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01Transitional//EN">

">

--

-->

十分对不起，登录失败，由于：

<%=request.getAttribute（"msg"）%>

success.jsp

<%@pagelanguage="java"import="java.util.*"pageEncoding="utf-8"%>

<%

Stringpath=request.getContextPath（）;

StringbasePath=request.getScheme（）+":

//"+request.getServerName（）+":

"+request.getServerPort（）+path+"/";

%>

DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01Transitional//EN">

">

--

-->

恭喜：

<%=request.getAttribute（"username"）%>,登录成功

Spring2.控制层

packagecom.spring.controller;

importjava.util.HashMap;

importjava.util.Map;

importjavax.servlet.http.HttpServletRequest;

importjavax.servlet.http.HttpServletResponse;

importorg.springframework.web.servlet.ModelAndView;

importorg.springframework.web.servlet.mvc.Controller;

importcom.spring.model.UserInfoBean;

publicclassLoginControllerimplementsController{

privateStringsuccessPage;

privateStringerrorPage;

//privateUserInfoBeanuserInfoBean;

publicStringgetSuccessPage（）{

returnsuccessPage;

}

publicvoidsetSuccessPage（StringsuccessPage）{

this.successPage=successPage;

}

publicvoidsetErrorPage（StringerrorPage）{

this.errorPage=errorPage;

}

privateStringgetErrorPage（）{

returnerrorPage;

}

publicModelAndViewhandleRequest（HttpServletRequestrequest,

HttpServletResponseresponse）throwsException{

Stringusername=request.getParameter（"username"）;

Stringpassword=request.getParameter（"password"）;

Stringmessage=null;

if（username==null||password==null||username.trim（）.equals（""）||password.trim（）.equals（""））

{

message="用户名或者密码为空";

Mapmodel=newHashMap（）;

model.put（"msg",message）;

returnnewModelAndView（getErrorPage（）,model）;

}

if（!

UserInfoBean.exisitUser（username））{

message=username+"不存在";

Mapmodel=newHashMap（）;

model.put（"msg",message）;

returnnewModelAndView（getErrorPage（）,model）;

}

if（!

UserInfoBean.confirmPassword（username,password））{

message=username+"密码不正确";

Mapmodel=newHashMap（）;

model.put（"msg",message）;

returnnewModelAndView（getErrorPage（）,model）;

}

else

{Mapmodel=newHashMap（）;

model.put（"username",username）;

returnnewModelAndView（getSuccessPage（）,model）;

}

}

//publicUserInfoBeangetUserInfoBean（）{

//returnuserInfoBean;

//}

//

//publicvoidsetUserInfoBean（UserInfoBeanuserInfoBean）{

//this.userInfoBean=userInfoBean;

//}

}

Spring3.模型层

packagecom.spring.model;

importjava.util.HashMap;

importjava.util.Map;

publicclassUserInfoBean{

privatestaticMapuserinfo=newHashMap（）;

static

{

StringnumberOneUser="zhangsan";

StringnumberOnePassword="123";

StringnumberTwoUser="lisi";

StringnumberTwoPassword="456";

userinfo.put（numberTwoUser,numberTwoPassword）;

userinfo.put（numberOneUser,numberOnePassword）;

}//判断一个用户名是否存在

publicstaticbooleanexisitUser（Stringusername）{

returnuserinfo.containsKey（username）;

}

publicstaticbooleanconfirmPassword（Stringusername,Stringpassword）

{returnuserinfo.get（username）.equals（password）;

}

}

Spring编写配置文件：

Web.xml

xmlversion="1.0"encoding="UTF-8"?

>

xmlns="

xmlns:

xsi="http:

//www.w3.org/2001/XMLSchema-instance"

xsi:

schemaLocation="

这里配置spring的后台servlet

dispatcherServlet

org.springframework.web.servlet.DispatcherServlet

指定spring配置文件的路径

contextConfigLocation

/WEB-INF/classes/applicationContext.xml

1

拦截所有以.do结尾的请求，可以修改

dispatcherServlet

*.do

login.jsp

SpringapplicationContext.xml

xmlversion="1.0"encoding="UTF-8"?

>

xmlns="http:

//www.springframework.org/schema/beans"

xmlns:

xsi="http:

//www.w3.org/2001/XMLSchema-instance"

xmlns:

p="http:

//www.springframework.org/schema/p"

xsi:

schemaLocation="http:

//www.springframework.org/schema/beanshttp:

//www.springframework.org/schema/beans/spring-beans-2.0.xsd">

login

error.jsp

success.jsp

---->

---->