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SpringMVC上传文件实例

2016-05-08 00:00 639 查看

用Commons FileUpload 上传文件

首先来配置一下SpringMVC的 XML

<?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:mvc="http://www.springframework.org/schema/mvc" 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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<context:component-scan base-package="Action" />
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>

<mvc:resources mapping="/css/**" location="/css/" />
<mvc:resources mapping="/*.html" location="/" />
<mvc:resources mapping="/image/**" location="/image/" />

<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
<!--上传文件  -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="utf-8"/>
<property name="maxUploadSize" value="10485760000"/>
<property name="maxInMemorySize" value="40960"/>
</bean>

</beans>

写一下Controller类

/**
* 视图控制类
* @author ZZQ
*
*/
@Controller
public class ScAction {
/**
*
* @param file       页面传来的file  前面必须加注解@RequestParam
* @param request    HttpServletRequest对象，这里是为了获取路径
* @param model      可以把数据加载带栈顶，用EL表达式可以获取
* @return           目的视图
*/
@RequestMapping("/save_file")
public String saveFile(@RequestParam MultipartFile file, HttpServletRequest request, Model model ) {
String fileName=file.getOriginalFilename();
File files = new File(request.getServletContext().getRealPath("/image"),fileName);
if(!files.exists()){
files.mkdirs();
}
try {
//保存
file.transferTo(files);
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
model.addAttribute("fileUrl", request.getContextPath()+"/image/"+fileName);
return "savefile";
}
/**
*
* @return  上传文件视图
*/
@RequestMapping("/upload")
public String upload(){
return "upload";
}
}

两个jsp页面

upload.jsp

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>
<%
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 'upload.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>
<form action="save_file" method="post" enctype="multipart/form-data">
<input type="file" name="file" /> <input type="submit" value="Submit" /></form>
</body>
</html>

savefile.jsp

<%@ page language="java" import="java.util.*" contentType="text/html; charset=utf-8"%>
<%
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 'upload.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>
<img alt="" src="${fileUrl}">
</body>
</html>

两个重要的jar

commons-fileupload-1.2.1.jar

commons-io-1.3.2.jar

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