文件上传 commons-FileUpload

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actionForm：

/** * * @version 1.0 * @author shen longguang * 2009-11-24 */public class FileUploadForm extends ValidatorForm {private static final long serialVersionUID = 1L;private FormFile file;public FormFile getFile() {return file;}public void setFile(FormFile file) {this.file = file;}@Overridepublic ActionErrors validate(ActionMapping mapping,HttpServletRequest request) {// TODO Auto-generated method stubreturn super.validate(mapping, request);}}

action：（BaseAction继承ActionSupport）

/** * 文件上传 * @version 1.0 * @author shen longguang * 2009-11-24 */public class FileUploadAction extends BaseAction {@Overridepublic ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {String path;// 得到该应用下的upload目录在服务器上的绝对路径path = request.getSession().getServletContext().getRealPath("/upload");ActionMessages errors = new ActionErrors();if (path == null) {// 如果为空表示不能访问，可能是系统设置了访问权限errors.add("pathError", new ActionMessage("fileUpload.pathError"));return mapping.findForward("faile");}File uploadDir = new File(path);// 得到该目录的文件对象if (!uploadDir.exists()) {// 判断该目录是否存在if (!uploadDir.mkdir()) {// 如果不存在就建立该目录/* 如果建立失败，给出提示 */errors.add("mkdirError", new ActionMessage("fileUpload.mkdirError"));return mapping.findForward("faile");}}if(!ServletFileUpload.isMultipartContent(request)){//用 ServletFileUpload 类的静态方法 isMultipartContent 判断 request 是否是 multipart/form-data 类型/* 只能 multipart/form-data 类型数据 */errors.add("fileError", new ActionMessage("fileUpload.fileError"));return mapping.findForward("faile");}//创建 DiskFileItemFactory 对象DiskFileItemFactory factory = new DiskFileItemFactory();//File repsFile = new File(path+"/temp");factory.setRepository(new File("c:/TIMS_FILEUPLOAD/TEMP"));//可以设置缓存目录factory.setSizeThreshold(1024 * 1024*2);//超过1m的数据采用临时文件缓存//创建 ServletFileUpload 对象，构造的时候传一个 DiskFileItemFactory 对象进去ServletFileUpload upload = new ServletFileUpload(factory);upload.setFileSizeMax(1024 * 1024 * 50);//单个文件大小50Mupload.setHeaderEncoding("utf-8");//设置普通字段名称和文件字段的文件名所采用的字符集编码upload.setSizeMax(1024 * 1024 * 100);//最多上传100m的文件FileUploadForm fuForm = (FileUploadForm)form;//得到表单控件FormFile file = fuForm.getFile();String fileName = file.getFileName();FileOutputStream out = new FileOutputStream(path + File.separator + fileName);out.write(file.getFileData());this.saveErrors(request, errors);return mapping.findForward("success");}}

显示层 jsp：

<%@ page language="java" pageEncoding="UTF-8"%><%@taglib uri="http://struts.apache.org/tags-html" prefix="html"%><%@taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%><html> <head>文件上传</head> <body> <html:form action="fileupload" method="post" enctype="multipart/form-data">file :<html:file property="file"/><br><html:submit/><html:cancel/></html:form> <a href="test.do?p=saveIn" mce_href="test.do?p=saveIn"">Medicine add test</a> </body></html>

struts-config.xml

<form-bean name="fileUploadForm"type="xx.xxx.struts.form.FileUploadForm" />

参考文档： http://commons.apache.org/fileupload/apidocs/index.html