java ssh 文件管理 上传下载

package com.test.web.action; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.text.SimpleDateFormat; import java.util.Date; import java.util.List; import javax.annotation.Resource; import javax.servlet.http.HttpServletResponse; import org.apache.commons.io.FileUtils; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; import com.test.model.UploadFile; import com.test.service.ItestService; public class TestAction extends ActionSupport { @Resource private ItestService service; private List<UploadFile> fileList;// 用于页面显示的文件列表 private UploadFile fileInfo;// 文件信息 private Long fileid;// 文件id private InputStream downloadStream;// 文件下载流 private String downloadName;// 文件下载的另存为名称 private File upload;// 实际上传文件 private String uploadFileName; // 上传文件名 private String title;// 文件标题 private String describe;// 文件描述 private String likeStr;// 查询的关键字 private Integer pageCount;// 总页数 private Integer rowCount;// 总行数 private Integer pageNow;// 当前页 /** * 显示文件列表 * * @return */ public String pageFiles() { Integer pageSize = 20;// 一页的行数 if (pageNow == null) { pageNow = 1; } if (likeStr == null) { likeStr = ""; } rowCount = service.getRowCount(likeStr); pageCount = rowCount / pageSize; if (rowCount % pageSize != 0) { pageCount++; } fileList = service.getFilesByPage(pageSize, (pageNow - 1) * pageSize, likeStr); return SUCCESS; } /** * 删除文件 * * @return * @throws NumberFormatException * @throws Exception */ public String deleteFile() { try { service.deleteFileById(fileid); } catch (IOException e) { System.out.println("文件不存在"); e.printStackTrace(); } return "deleteSuccess"; } /** * 加载文件信息 * * @return */ public String toUpdateFile() { fileInfo = service.findFileById(fileid); return "toUpdateSuccess"; } /** * 修改文件信息 * * @return */ public String updateFile() { fileInfo.setId(fileid); service.updateFile(fileInfo); return "updateSuccess"; } /** * 下载文件 点击下载后取消会报错 不影响 * * @return */ public String downloadFile() { HttpServletResponse response = (HttpServletResponse) ActionContext.getContext().get(ServletActionContext.HTTP_RESPONSE); UploadFile fileInfo = service.findFileById(fileid); try { downloadName = new String(fileInfo.getOldName().getBytes(), "ISO-8859-1"); downloadStream = new FileInputStream(new File(fileInfo.getFilePath())); response.setContentType("APPLICATION/OCTET-STREAM;charset=ISO-8859-1"); response.setHeader("Content-Disposition", "attachment;filename=" + downloadName); } catch (Exception e) { e.printStackTrace(); } return "downloadSuccess"; } /** * 上传文件 * * @return * @throws Exception */ public String uploadFile() throws Exception { try { Date now = new Date(); String uploadFormatDate = new SimpleDateFormat("yyyy-MM-dd").format(now);// 格式化当前系统时间 String targetpath = ServletActionContext.getServletContext().getRealPath("/download/" + uploadFormatDate + "/");// 获得目标路径 System.out.println("上传目录：" + targetpath); File targetFolder = new File(targetpath);// 目标目录 if (!targetFolder.exists()) {// 如果目标目录不存在，创建目录 targetFolder.mkdirs(); } String oldName = uploadFileName;// 上传的文件名 String fileExt = getExt(oldName);// 扩展名 Long fileSize = 0L;// 文件大小 单位字节 String newName = now.getTime() + fileExt;// 保存的文件名称 Thread.sleep(1);// 防止文件重名 if (title.equals("")) { title = "(无标题)"; } if (describe.equals("")) { describe = "(无描述)"; } File target = new File(targetpath, newName); // 文件0kb的话struts2 判断为不存在 if (!upload.exists()) { target.createNewFile(); } else { fileSize = upload.length(); FileUtils.copyFile(upload, target);// 上传至服务器的目录 } UploadFile uf = new UploadFile(oldName, newName, title, describe, target.getAbsolutePath(), fileSize, now);// 创建文件对象 service.saveFile(uf);// 保存记录 } catch (Exception e) { e.printStackTrace(); return INPUT; } return "uploadSuccess"; } /** * 获取文件的扩展名 * * @param fileName * 文件名 * @return */ public static String getExt(String fileName) { return fileName.substring(fileName.lastIndexOf(".")); } public UploadFile getFileInfo() { return fileInfo; } public void setFileInfo(UploadFile fileInfo) { this.fileInfo = fileInfo; } public Long getFileid() { return fileid; } public void setFileid(Long fileid) { this.fileid = fileid; } public String getDownloadName() { return downloadName; } public void setDownloadName(String downloadName) { this.downloadName = downloadName; } public File getUpload() { return upload; } public String getLikeStr() { return likeStr; } public void setLikeStr(String likeStr) { this.likeStr = likeStr; } public void setUpload(File upload) { this.upload = upload; } public Integer getPageCount() { return pageCount; } public void setPageCount(Integer pageCount) { this.pageCount = pageCount; } public Integer getRowCount() { return rowCount; } public void setRowCount(Integer rowCount) { this.rowCount = rowCount; } public Integer getPageNow() { return pageNow; } public void setPageNow(Integer pageNow) { this.pageNow = pageNow; } public String getUploadFileName() { return uploadFileName; } public void setUploadFileName(String uploadFileName) { this.uploadFileName = uploadFileName; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getDescribe() { return describe; } public void setDescribe(String describe) { this.describe = describe; } public List<UploadFile> getFileList() { return fileList; } public void setFileList(List<UploadFile> fileList) { this.fileList = fileList; } public InputStream getDownloadStream() { return downloadStream; } }