springMVC两种方式实现多文件上传及效率比较

Easter79
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springMVC实现多文件上传的方式有两种，一种是我们经常使用的以字节流的方式进行文件上传，另外一种是使用springMVC包装好的解析器进行上传。这两种方式对于实现多文件上传效率上却有着很大的差距，下面我们通过实例来看一下这两种方式的实现方式，同时比较一下在效率上到底存在着多大的差距。

1.下载相关jar包。需要引入的jar出了springMVC的jar包外，还需要引入com.springsource.org.apache.commons.fileupload-1.2.0.jar和com.springsource.org.apache.commons.io-1.4.0.jar。所有的jar包可以通过“点击这里”进行下载。

2.配置springAnnotation-servlet.xml文件（文件名称可以自定义，只要和web.xml中引入的名称一样即可）：

[html] view plaincopyspringMVC两种方式实现多文件上传及效率比较 springMVC两种方式实现多文件上传及效率比较

  3. <beans xmlns="http://www.springframework.org/schema/beans"

  4. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

  5. xmlns:p="http://www.springframework.org/schema/p"

  6. xmlns:mvc="http://www.springframework.org/schema/mvc"

  7. xmlns:context="http://www.springframework.org/schema/context"

  8. xmlns:util="http://www.springframework.org/schema/util"

  9. xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

  10. http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd

  11. http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd

  12. http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd"\>

  14. <context:component-scan base-package="com.tgb.web.controller.annotation"></context:component-scan>

  16. mvc:annotation-driven/

  18. <mvc:resources location="/img/" mapping="/img/**"/>

  19. <mvc:resources location="/js/" mapping="/js/**"/>

  20. <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">

  21. <property name="prefix" value="/"></property>

  22. <property name="suffix" value=".jsp"></property>

  23. </bean>

  24. <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

  25. <property name="defaultEncoding" value="utf-8"></property>

  26. <property name="maxUploadSize" value="10485760000"></property>

  27. <property name="maxInMemorySize" value="40960"></property>

  28. </bean>

  29. </beans>

  30. 配置web.xml文件：

[html] view plaincopyspringMVC两种方式实现多文件上传及效率比较 springMVC两种方式实现多文件上传及效率比较

  2. <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app\_2\_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app\_2\_5.xsd" id="WebApp_ID" version="2.5">

  3. <display-name>springMVC1</display-name>

  4. <welcome-file-list>

  5. <welcome-file>index.html</welcome-file>

  6. </welcome-file-list>

  7. <servlet>

  8. <servlet-name>springMVC</servlet-name>

  10. <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

  11. <init-param>

  12. <param-name>contextConfigLocation</param-name>

  13. <param-value>classpath*:config/springAnnotation-servlet.xml</param-value>

  14. </init-param>

  16. <load-on-startup>1</load-on-startup>

  17. </servlet>

  18. <filter>

  19. <filter-name>encodingFilter</filter-name>

  20. <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>

  21. <init-param>

  22. <param-name>encoding</param-name>

  23. <param-value>UTF-8</param-value>

  24. </init-param>

  25. <init-param>

  26. <param-name>forceEncoding</param-name>

  27. <param-value>true</param-value>

  28. </init-param>

  29. </filter>

  30. <filter-mapping>

  31. <filter-name>encodingFilter</filter-name>

  32. <url-pattern>/*</url-pattern>

  33. </filter-mapping>

  34. <servlet-mapping>

  35. <servlet-name>springMVC</servlet-name>

  36. <url-pattern>/</url-pattern>

  37. </servlet-mapping>

  38. </web-app>

  39. jsp页面代码：

[html] view plaincopyspringMVC两种方式实现多文件上传及效率比较 springMVC两种方式实现多文件上传及效率比较

  1. <%@ page language="java" contentType="text/html; charset=UTF-8"

  2. pageEncoding="UTF-8"%>

  4. <html>

  5. <head>