springMVC前后台数据交互
假设项目需求是在springMVC框架下，后台要传送一个list到前台，那我们就要做以下几个步骤：
1 在web.xml文件中进行springMVC的配置：
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <display-name></display-name> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
上图中标红的区域就是配置前后台交互的重要配置信息，即servlet的配置。
2 在src的目录下建立一个mvc.xml文件，对应web.xml文件中的<param-value>classpath:mvc.xml</param-value>配置。即渲染器配置，能够让前台命令提交的命令精确传送到后台，后台的数据准确传送到前台。配置如下：
<?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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 配置视图渲染器 --> <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <!-- 将视图名 渲染后视图的前缀 --> <property name="prefix" value="/WEB-INF/jsp/" /> <!-- 渲染后视图的后缀 --> <property name="suffix" value=".jsp" /> <!-- 例：视图名为:hello 渲染后：/WEB-INF/jsp/hello.jsp 该页面 --> </bean> <context:component-scan base-package="com.test.controller"/> </beans>
3 最后是controller，功能相当于ssh框架中的action，功能是处理前台传过来的命令。从上边的mvc.xml文件的配置就能看出来，这里我们用的是注解开发，如下：
@Controller public class ProgramLogController { @RequestMapping("/proLog") public ModelAndView GetproLog(HttpServletRequest req, HttpServletResponse resp){ ModelAndView mv = new ModelAndView(); ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml"); ProgramLogDao programLogDao = (ProgramLogDao)context.getBean("programLogDao"); List<ProgramLog> list = programLogDao.selectProgramLog(Constant.REFUSE); mv.addObject("msg", list); mv.setViewName("index"); return mv; } }
假设我们传送过来的是list，那么通过上边的代码，打开tomcat服务器，通过在浏览器访问localhost:8080/项目名/proLog.do就可以执行功能了。下面分别附上jsp文件和所引用jar包（jar包多于所需要的）。
jsp文件
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <% 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>programLog</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> <table width="80%" align="center"> <tr> <td>序号</td> <td>单机序号</td> <td>机器号</td> <td>动作序号</td> </tr> <c:forEach items="${msg }" var="log"> <tr> <td>${log.id }</td> <td>${log.sid }</td> <td>${log.machine_id }</td> <td>${log.action_id }</td> </tr> </c:forEach> </table> </body> </html>
jar包
aopalliance.jar
asm-3.3.1.jar
aspectjweaver.jar
cglib-2.2.2.jar
commons-logging-1.1.1.jar
javassist-3.17.1-GA.jar
log4j-1.2.17.jar
log4j-api-2.0-rc1.jar
log4j-core-2.0-rc1.jar
mybatis-3.2.7.jar
mybatis-spring-1.2.1.jar
mysql-connector-java-5.1.20-bin.jar
slf4j-api-1.7.5.jar
slf4j-log4j12-1.7.5.jar
spring-aop-4.1.6.RELEASE.jar
spring-aspects-4.1.6.RELEASE.jar
spring-beans-4.1.6.RELEASE.jar
spring-context-4.1.6.RELEASE.jar
spring-context-support-4.1.6.RELEASE.jar
spring-core-4.1.6.RELEASE.jar
spring-expression-4.1.6.RELEASE.jar
spring-jdbc-4.1.6.RELEASE.jar
spring-orm-4.1.6.RELEASE.jar
spring-tx-4.1.6.RELEASE.jar
spring-web-4.1.6.RELEASE.jar
spring-webmvc-4.1.6.RELEASE.jar
