java – Spring上传文件问题
发布时间:2020-12-14 05:12:53 所属栏目:Java 来源:网络整理
导读:我需要将文件从浏览器上传到服务器.我使用 spring 3.2作为我的Web框架. 所以我配置了我的应用程序这样. 1 – 我有web.xml ?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.
我需要将文件从浏览器上传到服务器.我使用
spring 3.2作为我的Web框架.
所以我配置了我的应用程序这样. 1 – 我有web.xml <?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"> <context-param> <param-name>contextClass</param-name> <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value> </context-param> <context-param> <param-name>contextConfigLocation</param-name> <param-value>racoonsoft.chaos.settings</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>MyServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value></param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>MyServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>admin/library</welcome-file> </welcome-file-list> </web-app> 2 – MainConfig类 @Configuration @Import({WebConfig.class }) public class MainConfig { @Bean public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() { return new PropertySourcesPlaceholderConfigurer(); } @Bean public static ScheduledAnnotationBeanPostProcessor scheduledAnnotationBeanPostProcessor() { return new ScheduledAnnotationBeanPostProcessor(); } @Bean public static StandardServletMultipartResolver multipartResolver() { StandardServletMultipartResolver resolver = new StandardServletMultipartResolver(); return resolver; } } 3 – 控制器来处理多部分上传 @Controller @MultipartConfig(fileSizeThreshold=1024*1024*2,// 2MB maxFileSize=1024*1024*10,// 10MB maxRequestSize=1024*1024*50) public class FileUpload { public static final int UPLOAD_RESULT_OK = 100000; @Autowired BookDao book_dao; @RequestMapping(value = "/admin/library/upload_file",method = RequestMethod.POST) public String saveFiles(@RequestParam("file-file") MultipartFile file) throws IOException { if (!file.isEmpty()) { byte[] bytes = file.getBytes(); return "redirect:caps/total_fail"; } else { return "redirect:caps/total_fail"; } } } 4 – jsp,我放置我的表单提交文件 ...<form method="post" action="/admin/library/upload_file" enctype="multipart/form-data"> <input type="text" name="name"/> <input type="file" name="file-file"/> <input type="submit"/> </form>... 当我提交表单时,我得到了一个例外 org.springframework.web.bind.MissingServletRequestParameterException: Required MultipartFile parameter 'file-file' is not present org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:202) 我不知道为什么当我删除@RequestParam annotaion我得到我的方法调用,但文件参数= null. 解决方法
我通过在我的spring配置文件中添加以下内容来修复这个问题:
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver" /> (我得到的错误是“org.springframework.web.bind.MissingServletRequestParameterException:必需的MultipartFile参数’myFile’不存在 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |