struts2上传文件，批量上传文件，需要的直接下载

package com.fileupload.test; import java.io.*; import java.text.SimpleDateFormat; import java.util.*; import org.apache.commons.fileupload.*; import org.apache.commons.fileupload.FileUploadBase.InvalidContentTypeException; import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException; import org.apache.commons.fileupload.util.*; import org.apache.commons.fileupload.servlet.*; import org.apache.commons.fileupload.FileItemIterator; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import sun.misc.BASE64Decoder; import javax.servlet.http.HttpServletRequest; /** * UEditor文件上传辅助类 * */ public class Uploader { // 输出文件地址 private String url = ""; // 上传文件名 private String fileName = ""; // 状态 private String state = ""; // 文件类型 private String type = ""; // 原始文件名 private String originalName = ""; // 文件大小 private String size = ""; private HttpServletRequest request = null; private String title = ""; // 保存路径 private String savePath = "upload"; // 文件允许格式 private String[] allowFiles = { ".rar", ".doc", ".docx", ".zip", ".pdf",".txt", ".swf", ".wmv", ".gif", ".png", ".jpg", ".jpeg", ".bmp" }; // 文件大小限制，单位KB private int maxSize = 10000; private HashMap<String, String> errorInfo = new HashMap<String, String>(); public Uploader(HttpServletRequest request) { this.request = request; HashMap<String, String> tmp = this.errorInfo; tmp.put("SUCCESS", "SUCCESS"); //默认成功 tmp.put("NOFILE", "未包含文件上传域"); tmp.put("TYPE", "不允许的文件格式"); tmp.put("SIZE", "文件大小超出限制"); tmp.put("ENTYPE", "请求类型ENTYPE错误"); tmp.put("REQUEST", "上传请求异常"); tmp.put("IO", "IO异常"); tmp.put("DIR", "目录创建失败"); tmp.put("UNKNOWN", "未知错误"); } public void upload() throws Exception { boolean isMultipart = ServletFileUpload.isMultipartContent(this.request); if (!isMultipart) { this.state = this.errorInfo.get("NOFILE"); return; } DiskFileItemFactory dff = new DiskFileItemFactory(); String savePath = this.getFolder(this.savePath); dff.setRepository(new File(savePath)); try { ServletFileUpload sfu = new ServletFileUpload(dff); sfu.setSizeMax(this.maxSize * 1024); sfu.setHeaderEncoding("utf-8"); FileItemIterator fii = sfu.getItemIterator(this.request); while (fii.hasNext()) { FileItemStream fis = fii.next(); if (!fis.isFormField()) { this.originalName = fis.getName().substring(fis.getName().lastIndexOf(System.getProperty("file.separator")) + 1); if (!this.checkFileType(this.originalName)) { this.state = this.errorInfo.get("TYPE"); continue; } this.fileName = this.getName(this.originalName); this.type = this.getFileExt(this.fileName); this.url = savePath + "/" + this.fileName; BufferedInputStream in = new BufferedInputStream(fis.openStream()); FileOutputStream out = new FileOutputStream(new File(this.getPhysicalPath(this.url))); BufferedOutputStream output = new BufferedOutputStream(out); Streams.copy(in, output, true); this.state=this.errorInfo.get("SUCCESS"); //UE中只会处理单张上传，完成后即退出 break; } else { String fname = fis.getFieldName(); //只处理title，其余表单请自行处理 if(!fname.equals("pictitle")){ continue; } BufferedInputStream in = new BufferedInputStream(fis.openStream()); BufferedReader reader = new BufferedReader(new InputStreamReader(in)); StringBuffer result = new StringBuffer(); while (reader.ready()) { result.append((char)reader.read()); } this.title = new String(result.toString().getBytes(),"utf-8"); reader.close(); } } } catch (SizeLimitExceededException e) { this.state = this.errorInfo.get("SIZE"); } catch (InvalidContentTypeException e) { this.state = this.errorInfo.get("ENTYPE"); } catch (FileUploadException e) { this.state = this.errorInfo.get("REQUEST"); } catch (Exception e) { this.state = this.errorInfo.get("UNKNOWN"); } } /** * 接受并保存以base64格式上传的文件 * @param fieldName */ public void uploadBase64(String fieldName){ String savePath = this.getFolder(this.savePath); String base64Data = this.request.getParameter(fieldName); this.fileName = this.getName("test.png"); this.url = savePath + "/" + this.fileName; BASE64Decoder decoder = new BASE64Decoder(); try { File outFile = new File(this.getPhysicalPath(this.url)); OutputStream ro = new FileOutputStream(outFile); byte[] b = decoder.decodeBuffer(base64Data); for (int i = 0; i < b.length; ++i) { if (b[i] < 0) { b[i] += 256; } } ro.write(b); ro.flush(); ro.close(); this.state=this.errorInfo.get("SUCCESS"); } catch (Exception e) { this.state = this.errorInfo.get("IO"); } } /** * 文件类型判断 * * @param fileName * @return */ private boolean checkFileType(String fileName) { Iterator<String> type = Arrays.asList(this.allowFiles).iterator(); while (type.hasNext()) { String ext = type.next(); if (fileName.toLowerCase().endsWith(ext)) { return true; } } return false; } /** * 获取文件扩展名 * * @return string */ private String getFileExt(String fileName) { return fileName.substring(fileName.lastIndexOf(".")); } /** * 依据原始文件名生成新文件名 * @return */ private String getName(String fileName) { Random random = new Random(); return this.fileName = "" + random.nextInt(10000) + System.currentTimeMillis() + this.getFileExt(fileName); } /** * 根据字符串创建本地目录 并按照日期建立子目录返回 * @param path * @return */ private String getFolder(String path) { SimpleDateFormat formater = new SimpleDateFormat("yyyyMMdd"); path += "/" + formater.format(new Date()); File dir = new File(this.getPhysicalPath(path)); if (!dir.exists()) { try { dir.mkdirs(); } catch (Exception e) { this.state = this.errorInfo.get("DIR"); return ""; } } return path; } /** * 根据传入的虚拟路径获取物理路径 * * @param path * @return */ private String getPhysicalPath(String path) { String servletPath = this.request.getServletPath(); String realPath = this.request.getSession().getServletContext() .getRealPath(servletPath); return new File(realPath).getParent() +"/" +path; } public void setSavePath(String savePath) { this.savePath = savePath; } public void setAllowFiles(String[] allowFiles) { this.allowFiles = allowFiles; } public void setMaxSize(int size) { this.maxSize = size; } public String getSize() { return this.size; } public String getUrl() { return this.url; } public String getFileName() { return this.fileName; } public String getState() { return this.state; } public String getTitle() { return this.title; } public String getType() { return this.type; } public String getOriginalName() { return this.originalName; } }