我們在進行springMVC開發時,必定會在jsp頁面引入js檔案、img檔案和css檔案。大多數人會将這些分類存放在WebRoot檔案下建立的檔案夾下面。同時,會在web.xml檔案中配置攔截所有請求。這樣就造成了頁面無法通路到js、img和css檔案夾中的檔案了。
在SpringMVC中可以利用 <mvc:resources location="/img/" mapping="/img/**"/>來通路。進而解決了上述問題。
下面是,我寫的一個demo。
先看看其它檔案。
web.xml(這個檔案寫好後幾乎不用再進行修改了):
<?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">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 設定開啟時的導入配置檔案 。可以不是必須的檔案名稱,可自定義-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:config/*-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup> <!-- 啟動tomcat時啟動springMFC -->
</servlet>
<servlet-mapping>
<url-pattern>/</url-pattern><!-- 攔截所有請求 -->
</servlet-mapping>
</web-app>
先看顯示圖檔的:img.jsp:
<%@ 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>My JSP 'hello.jsp' starting page</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>
你好SpringMVC!!!<br/>
<h4>顯示一張圖檔</h4>
<br/>
<img alt="圖檔" src="img/we.jpg">
</div>
</body>
</html>
在java檔案中:
package com.yx.controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.multiaction.MultiActionController;
public class MultiController extends MultiActionController {
public ModelAndView img(HttpServletRequest request,HttpServletResponse response){
System.out.println("-----img-------");
return new ModelAndView("/img");
}
public ModelAndView js(HttpServletRequest request,HttpServletResponse response){
System.out.println("-----js-------");
return new ModelAndView("/testJS");
}
以上檔案與前面講的十分的相似,改動不大。
下面是spring的配置檔案:
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<!-- 正常單class多方法bean -->
<bean name="/test/multi" class="com.yx.controller.MultiController">
<property name="methodNameResolver">
<ref bean="paramMethodResolver"/>
</property>
</bean>
<!-- 正常單class單方法bean -->
<bean name="/test/hello" class="com.yx.controller.HelloSpringMVCController"></bean>
<!-- 靜态資源通路 -->
<mvc:resources location="/img/" mapping="/img/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
<!--以上兩句就是設定spring的攔截器不對img檔案夾與js檔案夾的檔案進行攔截-->
<!-- 參數名稱解析 -->
<bean id="paramMethodResolver" class="org.springframework.web.servlet.mvc.multiaction.ParameterMethodNameResolver">
<property name="paramName" value="action"></property>
<!-- 視圖解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/jsp"></property> <!-- 字首 -->
<property name="suffix" value=".jsp"></property> <!-- 字尾 -->
</beans>
這樣子圖檔就可以顯示出來了:
