一、概述。
在很多企业的开法中常常用到springmvc+spring+hibernate(mybatis)这样的架构,springmvc相当于struts是页面到contorller直接的交互的框架也是界面把信息传输到contorller层的一种架构,通过这个架构可以让我们把页面和contorller层解耦,使得开发人员的分工更加明确。
二、代码演示。
1、首先配置springmvc环境。
1.1导入jar。
值得注意的是红色标记的commons-logging这个jar包一定得引入进去不然会报错。
1.2、xml配置文件。
web.xml
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<?xml version= "1.0" encoding= "utf-8" ?> <web-app xmlns:xsi= "http://www.w3.org/2001/xmlschema-instance" xmlns= "http://xmlns.jcp.org/xml/ns/javaee" xsi:schemalocation= "http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id= "webapp_id" version= "3.1" > <servlet> <servlet-name>springmvc</servlet-name> <servlet- class >org.springframework.web.servlet.dispatcherservlet</servlet- class > <load-on-startup> 1 </load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.spring</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app> |
springmvc-servlet.xml
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<?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:p= "http://www.springframework.org/schema/p" xmlns:context= "http://www.springframework.org/schema/context" xsi:schemalocation=" http: //www.springframework.org/schema/beans http: //www.springframework.org/schema/beans/spring-beans-3.0.xsd http: //www.springframework.org/schema/context http: //www.springframework.org/schema/context/spring-context-3.0.xsd"> <context:component-scan base- package = "com.gaowei.controller" /> </beans> |
2、前台界面代码。
login.jsp
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<%@ 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= "login.spring" method= "post" > username:<input type= "text" name= "username" > <br/> password:<input type= "text" name= "password" > <br/> <input type= "submit" value= "登录" > </form> </body> </html> |
no.jsp
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<%@ 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> no! </body> </html> |
ok.jsp
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<%@ 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> ok! welcome:${username} </body> </html> |
3、contorller层接收前台的两种方式。
方式一:
利用@requestparam这个注解
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package com.gaowei.controller; import org.springframework.stereotype.controller; import org.springframework.ui.model; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestparam; @controller public class login { //方式一 @requestmapping ( "/login" ) public string login( @requestparam ( "username" ) string username, @requestparam ( "password" ) string password,model model){ if (username.equals(password)) { model.addattribute( "username" , username); return "ok.jsp" ; } else { return "no.jsp" ; } } } |
方式二:
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package com.gaowei.controller; import org.springframework.stereotype.controller; import org.springframework.ui.model; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.requestparam; @controller public class login { @requestmapping ( "/login" ) public string login(string username,string password,model model){ if (username.equals(password)) { model.addattribute( "username" , username); return "ok.jsp" ; } else { return "no.jsp" ; } } } |
4、界面结果。
第一种传值方式:
第二种传值方式:
三、总结。
这里体现出了springmvc传值方式的多样性满足了开发人员的不同需求。第一种用来表单的提交。第二种用来界面间相互传值,也为了方便开发人员利用ajax。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://blog.csdn.net/gwblue/article/details/42966017