使用传统javaweb进行文件上传
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使用传统文件上传方式
1、配置依赖
<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> <spring.version>5.0.2.RELEASE</spring.version> </properties> <dependencies> <!-- spring --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.8</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>compile</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> <!-- javaweb传统文件上传--> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> </dependencies>
2、配置web.xml
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" > <web-app> <display-name>Archetype Created Web Application</display-name> <!--配置前端控制器--> <servlet> <servlet-name>dispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!--加载springmvc.xml配置文件--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <!--启动服务器，创建该servlet--> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!--解决中文乱码的过滤器--> <filter> <filter-name>characterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
3、配置springmvc.xml（注意配置视图解析器对象 ）
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" 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 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"> <!--开启注解扫描，只扫描Controller注解--> <context:component-scan base-package="cn.flypig666"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!--配置的视图解析器对象--> <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/"/> <property name="suffix" value=".jsp"/> </bean> <!--<!–配置的视图解析器对象–>--> <!--<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">--> <!--<property name="prefix" value="/WEB-INF/pages/"/>--> <!--<property name="suffix" value=".jsp"/>--> <!--</bean>--> <!--过滤静态资源--> <!--<mvc:resources location="/css/" mapping="/css/**" />--> <!--<mvc:resources location="/fonts/" mapping="/fonts/**"/>--> <!--<mvc:resources location="/images/" mapping="/images/**" />--> <!--<mvc:resources location="/js/" mapping="/js/**" />--> <!--开启SpringMVC注解的支持--> <mvc:annotation-driven/> </beans>
4、编写jsp
<h3>文件上传</h3> <form action="file/upload1" method="post" enctype="multipart/form-data"> 选择文件：<input type="file" name="upload1" /><br/> <input type="submit" value="上传" /> </form>
5、编写controller
@Controller @RequestMapping("/file") public class UploadFileController { @RequestMapping("/upload1") public String fileupload1(HttpServletRequest request) throws Exception { System.out.println("文件上传"); // 使用fileupload组件完成组件上传 // 上传的位置 // request.getSession().getServletContext():拿到最大的域对象,getRealPath()：拿到某路径下的绝对路径 String path = request.getSession().getServletContext().getRealPath("/uploads/"); // 判断该路径是否存在 File file = new File(path); if (!file.exists()){ // 创建文件夹 file.mkdirs(); } // 解析request对象，获取上传文件项 // 创建磁盘文件项工厂 DiskFileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); // 解析request,返回一个list集合，集合里是文件项 List<FileItem> items = upload.parseRequest(request); // 遍历 for (FileItem item:items){ // 进行判断，当前item对象是否是上传文件项 if (item.isFormField()){ // true说明普通表单向 }else{ // false说明是上传文件项 // 获取上传文件名 String filename = item.getName(); // 把文件的名称设置为唯一值,uuid String uuid = UUID.randomUUID().toString().replace("-", ""); filename = uuid + "_" + filename; // 完成文件上传 item.write(new File(path,filename)); // 删除临时文件,由于传统web上传会产生一个临时文件（>10kb） item.delete(); } } return "success"; } }
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