学步园

1.首先在action中写如下代码

/*<br /> * fileupload,fileuploadFileName,fileuploadContentType命名规则，否则无法取值<br /> * fileupload为客户端input上传组件的name,fileuploadFileName文件名称是fileupload+FileName组成，必须这样<br /> * fileuploadContentType 文件类型是fileupload+ContentType组成，必须这样写<br /> */<br /> private File fileupload;//上传的文件<br /> private String fileuploadFileName;//文件的名称 如上传的文件是a.png 则fileuploadFileName值为"a.png"<br /> private String fileuploadContentType;//文件的类型 如上传的是png格式的图片，则fileuploadContentType值为"image/png"<br /> /*<br /> * 指定上传文件在服务器上的保存目录，需要在Action中为定义savePath变量并为其添加相应的setter和getter方法<br /> * 便于Struts2将struts.xml中的<param name="savePath">uploads/</param>值赋给savePath属性<br /> */<br /> private String savePath;//文件的保存位置</p> <p> public String uploadFile() throws Exception {<br /> String absolutePath = ServletActionContext.getServletContext().getRealPath(""); // 获取项目根路径<br /> //文件路径<br /> String path = absolutePath + "/" + this.savePath + "/";<br /> //创建路径，如果目录不存在，则创建<br /> File file = new File(path);<br /> if(!file.exists()) {<br /> file.mkdirs();<br /> }<br /> //文件路径+文件名<br /> path +=this.getFileuploadFileName();<br /> //1.构建输入流<br /> FileInputStream fis = new FileInputStream(fileupload);<br /> //2.构建输出流<br /> FileOutputStream fos = new FileOutputStream(path);<br /> //3.通过字节写入输出流<br /> try {<br /> byte[] buf = new byte[1024];<br /> int len = 0;<br /> while ((len = fis.read(buf)) > 0) {<br /> fos.write(buf, 0, len);<br /> }<br /> } catch (Exception e) {<br /> e.printStackTrace();<br /> } finally {<br /> fis.close();<br /> fos.close();<br /> }<br /> return SUCCESS;<br /> }<br /> @JSON(serialize = false)<br /> public File getFileupload() {<br /> return fileupload;<br /> }<br /> public void setFileupload(File fileupload) {<br /> this.fileupload = fileupload;<br /> }<br /> @JSON(serialize = false)<br /> public String getSavePath() {<br /> return savePath;<br /> }<br /> public void setSavePath(String savePath) {<br /> this.savePath = savePath;<br /> }<br /> public String getFileuploadFileName() {<br /> return fileuploadFileName;<br /> }<br /> public void setFileuploadFileName(String fileuploadFileName) {<br /> this.fileuploadFileName = fileuploadFileName;<br /> }<br /> public String getFileuploadContentType() {<br /> return fileuploadContentType;<br /> }<br /> public void setFileuploadContentType(String fileuploadContentType) {<br /> this.fileuploadContentType = fileuploadContentType;<br /> } 

2.在struts.xml中写入：

<action name="uploadFile" class="authResourcesAction" method="uploadFile"><br /> <!-- 配置 fileupload 的拦截器 --><br /> <interceptor-ref name="fileUpload"><br /> <!-- 可以支持上传的文件类型 --><br /> <param name="allowedTypes"><br /> image/bmp,image/png,image/gif,image/jpeg,image/jpg<br /> </param><br /> <!-- 设置上传文件的大小不能超过1M --><br /> <param name="maximumSize">1024*1024</param><br /> </interceptor-ref><br /> <!-- 必须配置系统默认的拦截器 --><br /> <interceptor-ref name="defaultStack" /><br /> <!-- 设置上传文件的默认保存路径 --><br /> <param name="savePath">uploads</param><br /> <result name="input">/customer/addNew.jsp</result><br /> <result name="success" type="redirect">/userMgr/userInfo.jsp</result><br /> </action> 

3.客户端jsp页面中：

<s:form action ="uploadFile" method ="POST" enctype ="multipart/form-data"><br /> <s:file name ="fileupload"/><br /> <s:submit value="上传" label="upload"/><br /> </s:form> 

*注意：form表单一定要是：method ="POST" enctype ="multipart/form-data"