spring mvc(注解)上传文件的简单例子。
这有几个需要注意的地方
1.form的enctype=”multipart/form-data” 这个是上传文件必须的
2.applicationContext.xml中 <bean id=”multipartResolver” class=”org.springframework.web.multipart.commons.CommonsMultipartResolver”/> 关于文件上传的配置不能少
3、亲这两个jar包不能少哦,之前就是因为少了这个两个jar,一直报一些奇葩的错,给我累了个半死~(版本没什么要求)
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
大家可以看具体代码如下:
web.xml
<?xml version="0" encoding="UTF-8"?> <web-app xmlns:xsi="http://codeifaction; import javaioFile; import javautilDate; import javaxservlethttpHttpServletRequest; import orgspringframeworkstereotypeController; import orgspringframeworkuiModelMap; import orgspringframeworkwebbindannotationRequestMapping; import orgspringframeworkwebbindannotationRequestParam; import orgspringframeworkwebmultipartMultipartFile; @Controller public class UploadAction { @RequestMapping(value = "/uploaddo") public String upload(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request, ModelMap model) { Systemoutprintln("开始"); String path = requestgetSession()getServletContext()getRealPath("upload"); String fileName = filegetOriginalFilename(); // String fileName = new Date()getTime()+"jpg"; Systemoutprintln(path); File targetFile = new File(path, fileName); if(!targetFileexists()){ targetFilemkdirs(); } //保存 try { filetransferTo(targetFile); } catch (Exception e) { eprintStackTrace(); } modeladdAttribute("fileUrl", requestgetContextPath()+"/upload/"+fileName); return "result"; } }index.jsp
<%@ page pageEncoding="utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>上传图片</title> </head> <body> <form action="uploaddo" method="post" enctype="multipart/form-data"> <input type="file" name="file" /> <input type="submit" value="Submit" /></form> </body> </html>WEB-INF/jsp/下的result.jsp
<%@ page pageEncoding="utf-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>上传结果</title> </head> <body> <img alt="" src="${fileUrl }" /> </body> </html>以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。