Spring MVC文件上传教程
1- 介绍
2- 创建工程
- File/New/Other..
输入:
- Group ID: com.yiibai
- Artifact ID: SpringMVCFileUpload
- Package: com.yiibai.springmvcfileupload
这样,工程就被创建了,如下图所示:
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不要担心项目被创建时有错误消息。原因是,你还没有声明的Servlet库。
注意:
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3- 配置Maven
- pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion>
<groupId>com.yiibai</groupId>
<artifactId>SpringMVCFileUpload</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>SpringMVCFileUpload Maven Webapp</name>
<url>http://maven.apache.org</url> <dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency> <!-- Servlet API -->
<!-- http://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency> <!-- Jstl for jsp page -->
<!-- http://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency> <!-- JSP API -->
<!-- http://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency> <!-- Spring dependencies -->
<!-- http://mvnrepository.com/artifact/org.springframework/spring-core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.1.4.RELEASE</version>
</dependency> <!-- http://mvnrepository.com/artifact/org.springframework/spring-web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.4.RELEASE</version>
</dependency> <!-- http://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.4.RELEASE</version>
</dependency> <!-- Apache Commons FileUpload -->
<!-- http://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency> <!-- Apache Commons IO -->
<!-- http://mvnrepository.com/artifact/commons-io/commons-io -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
</dependencies> <build>
<finalName>SpringMVCFileUpload</finalName>
<plugins> <!-- Config: Maven Tomcat Plugin -->
<!-- http://mvnrepository.com/artifact/org.apache.tomcat.maven/tomcat7-maven-plugin -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version> <!-- Config: contextPath and Port (Default - /SpringMVCFileUpload : 8080) --> <!--
<configuration>
<path>/</path>
<port>8899</port>
</configuration>
-->
</plugin>
</plugins>
</build> </project>
4- 配置Spring
配置 web.xml.
- WEB-INF/web.xml
<web-app 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_3_0.xsd"
version="3.0"> <display-name>Archetype Created Web Application</display-name>
<servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet> <servlet-mapping>
<servlet-name>spring-mvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping> <!-- Other XML Configuration -->
<!-- Load by Spring ContextLoaderListener -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/root-context.xml
</param-value>
</context-param> <!-- Spring ContextLoaderListener -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> </web-app>
- WEB-INF/spring-mvc-servlet.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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd"> <!-- Package Scan -->
<context:component-scan base-package="com.yiibai.springmvcfileupload" /> <!-- Enables the Spring MVC Annotation Configuration -->
<context:annotation-config />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix">
<value>/WEB-INF/pages/</value>
</property> <property name="suffix">
<value>.jsp</value>
</property>
</bean> <bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- Maximum file size: 1MB -->
<!-- 1MB = 125000 Byte -->
<property name="maxUploadSize" value="125000" />
</bean> </beans>
- WEB-INF/root-context.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd"> <!-- Empty --> </beans>
5- Java类
- MyFileUploadController.java
package com.yiibai.springmvcfileupload; import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List; import javax.servlet.http.HttpServletRequest; import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile; @Controller
public class MyFileUploadController { // Upload One File.
@RequestMapping(value = "/uploadOneFile")
public String uploadOneFileHandler() {
// Forward to "/WEB-INF/pages/uploadOneFile.jsp".
return "uploadOneFile";
} // Upload Multi File.
@RequestMapping(value = "/uploadMultiFile")
public String uploadMultiFileHandler() {
// Forward to "/WEB-INF/pages/uploadMultiFile.jsp".
return "uploadMultiFile";
} // uploadOneFile.jsp, uploadMultiFile.jsp submit to.
@RequestMapping(value = "/doUpload", method = RequestMethod.POST)
public String uploadFileHandler(HttpServletRequest request, Model model,
@RequestParam("file") MultipartFile[] files) { // Root Directory.
String uploadRootPath = request.getServletContext().getRealPath(
"upload");
System.out.println("uploadRootPath=" + uploadRootPath); File uploadRootDir = new File(uploadRootPath);
//
// Create directory if it not exists.
if (!uploadRootDir.exists()) {
uploadRootDir.mkdirs();
}
//
List<File> uploadedFiles = new ArrayList<File>();
for (int i = 0; i < files.length; i++) {
MultipartFile file = files[i]; // Client File Name
String name = file.getOriginalFilename();
System.out.println("Client File Name = " + name); if (name != null && name.length() > 0) {
try {
byte[] bytes = file.getBytes(); // Create the file on server
File serverFile = new File(uploadRootDir.getAbsolutePath()
+ File.separator + name); // Stream to write data to file in server.
BufferedOutputStream stream = new BufferedOutputStream(
new FileOutputStream(serverFile));
stream.write(bytes);
stream.close();
//
uploadedFiles.add(serverFile);
System.out.println("Write file: " + serverFile);
} catch (Exception e) {
System.out.println("Error Write file: " + name);
}
}
}
model.addAttribute("uploadedFiles", uploadedFiles);
return "uploadResult";
} }
6- 视图(JSP)
- uploadOneFile.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Upload One File</title>
</head>
<body> <h3>Upload One File:</h3> <form method="POST" action="doUpload" enctype="multipart/form-data">
File to upload: <input type="file" name="file"><br />
<input type="submit" value="Upload">
</form> </body>
</html>
- uploadMultiFile.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Upload Multi File</title>
</head>
<body> <h3>Upload Multiple File:</h3> <form method="POST" action="doUpload" enctype="multipart/form-data"> File to upload (1): <input type="file" name="file"><br />
File to upload (2): <input type="file" name="file"><br />
File to upload (3): <input type="file" name="file"><br />
File to upload (4): <input type="file" name="file"><br />
File to upload (5): <input type="file" name="file"><br /> <input type="submit" value="Upload">
</form>
</body>
</html>
- uploadResult.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Upload Result</title>
</head>
<body>
<h3>Uploaded Files:</h3> <c:forEach items="${uploadedFiles}" var="file">
- ${file} <br>
</c:forEach> </body>
</html>
7- 运行应用程序
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输入:
- Name: Run SpringMVCFileUpload
- Base directory: ${workspace_loc:/SpringMVCFileUpload}
- Goals: tomcat7:run
点击运行(Run):
- http://localhost:8080/SpringMVCFileUpload/uploadOneFile
- http://localhost:8080/SpringMVCFileUpload/uploadMultiFile
a
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