java附件上传下载磁盘版-白红宇

java附件上传下载磁盘版

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发布时间：2019-06-14

本文共 6684 字，大约阅读时间需要 22 分钟。

ACTION

public class UploadAction extends BaseAction {    private static final long serialVersionUID = 1L;    @Autowired    private UploadService uploadser;    public String index() {        return "upload";    }    // 附件上传    public void up() throws IOException {        // 设置文件缓存地址和缓存大小,需要时在设置/        File bufferTemp = new File(Path.UPLOAD_FILES);        if (!bufferTemp.exists()) {            bufferTemp.mkdirs();        }        if (attfile != null) {            Map
     
       fileInfo = getfileInfo();            File savefile = new File(bufferTemp, fileInfo.get("fileid") + "."                    + fileInfo.get("fsuffix"));            if (!savefile.getParentFile().exists())                savefile.getParentFile().mkdirs();            FileUtils.copyFile(attfile, savefile);            response.setContentType("text/html;charset=UTF-8");            if (uploadser.save(fileInfo) > 0) {                response.getWriter().write(                        "
      ");            } else {                response.getWriter().write(                        "
      ");            }        }    }    // 附件下载    public void down() throws IOException {        Map
      
        fileinfo = new HashMap
       
        ();        fileinfo = uploadser.getFileInfo(fileid);        String filename = fileid + "." + fileinfo.get("fsuffix");        File file = new File(Path.UPLOAD_FILES + "\\" + filename);        if (!file.exists()) {            response.sendError(404, "File not found!");        }        BufferedInputStream br = new BufferedInputStream(new FileInputStream(                file));        byte[] buf = new byte[1024];        int len = 0;        response.setCharacterEncoding("utf-8");        response.setContentType("application/x-msdownload");        response.setHeader(                "Content-disposition",                "attachment; filename="                        + URLEncoder.encode(fileinfo.get("filename") + "."                                + fileinfo.get("fsuffix"), "utf-8"));        OutputStream out = response.getOutputStream();        while ((len = br.read(buf)) > 0)            out.write(buf, 0, len);        br.close();        out.close();    }    // 删除单个附件    public void del() throws IOException {        int row = uploadser.delByFileId(fileid);        response.getWriter().print(row > 0 ? true : false);    }    // 组合上传附件信息    private Map
        
          getfileInfo() {        Map
         
           infoMap = new HashMap
          
           (); infoMap.put("fileid", Tool.getUUID()); infoMap.put("filename", attfileFileName.substring(0, attfileFileName.lastIndexOf("."))); infoMap.put("filetype", filetype); infoMap.put("dataid", dataid); infoMap.put("fcreateuserid", getLogin().getId()); infoMap.put("fcreateusername", getLogin().getName()); infoMap.put("fcreatetime", DateUtil.getCurrentDateAsString("yyyy-MM-dd")); infoMap.put("fsuffix", attfileFileName.substring( attfileFileName.lastIndexOf(".") + 1, attfileFileName.length())); return infoMap; } private String postfix; private String filetype; private String dataid; private String fileid; private File attfile; private String attfileFileName; public String getFileid() { return fileid; } public void setFileid(String fileid) { this.fileid = fileid; } public String getPostfix() { return postfix; } public void setPostfix(String postfix) { this.postfix = postfix; } public String getFiletype() { return filetype; } public void setFiletype(String filetype) { this.filetype = filetype; } public String getDataid() { return dataid; } public void setDataid(String dataid) { this.dataid = dataid; } public File getAttfile() { return attfile; } public void setAttfile(File attfile) { this.attfile = attfile; } public String getAttfileFileName() { return attfileFileName; } public void setAttfileFileName(String attfileFileName) { this.attfileFileName = attfileFileName; }}

SERVICE

@Servicepublic class UploadService {    @Autowired    UploadDao uploaddao;    // 保存    public int save(Map
     
       fileInfo) {        return uploaddao.save(fileInfo);    }    // 取得附件列表    public List
      
       
        > getFilesByDataId(String dataid) {        return uploaddao.getFilesByDataId(dataid);    }    // 根据附件ID删除    public int delByFileId(String fileid) {        Map
        
          fileinfo = this.getFileInfo(fileid);        int reval = 0;        if (fileid.length() > 0) {            reval = delDiskFile(fileid + "." + fileinfo.get("fsuffix")) ? uploaddao                    .delByFileId(fileid) : 0;        }        return reval;    }    // 根据业务数据ID批量删除    public int delByDataId(String dataid) {        List
         
          
           > filesinfo = this.getFilesByDataId(dataid); Map
           
             fileinfo = null; int reval = 0; if (filesinfo.size() > 0) { for (int i = 0; i < filesinfo.size(); i++) { fileinfo = filesinfo.get(i); delDiskFile(fileinfo.get("fileid") + "." + fileinfo.get("fsuffix")); } reval = uploaddao.delByDataId(dataid); } return reval; } // 获取附件信息 public Map
            
              getFileInfo(String fileid) { return uploaddao.getFileInfo(fileid); } // 删除磁盘文件 private boolean delDiskFile(String filename) { File file = new File(Path.UPLOAD_FILES + "\\" + filename); boolean suc = false; if (file.exists()) { suc = file.delete(); } return suc; }}

DAO

@Servicepublic class UploadService {    @Autowired    UploadDao uploaddao;    // 保存    public int save(Map
     
       fileInfo) {        return uploaddao.save(fileInfo);    }    // 取得附件列表    public List
      
       
        > getFilesByDataId(String dataid) {        return uploaddao.getFilesByDataId(dataid);    }    // 根据附件ID删除    public int delByFileId(String fileid) {        Map
        
          fileinfo = this.getFileInfo(fileid);        int reval = 0;        if (fileid.length() > 0) {            reval = delDiskFile(fileid + "." + fileinfo.get("fsuffix")) ? uploaddao                    .delByFileId(fileid) : 0;        }        return reval;    }    // 根据业务数据ID批量删除    public int delByDataId(String dataid) {        List
         
          
           > filesinfo = this.getFilesByDataId(dataid); Map
           
             fileinfo = null; int reval = 0; if (filesinfo.size() > 0) { for (int i = 0; i < filesinfo.size(); i++) { fileinfo = filesinfo.get(i); delDiskFile(fileinfo.get("fileid") + "." + fileinfo.get("fsuffix")); } reval = uploaddao.delByDataId(dataid); } return reval; } // 获取附件信息 public Map
            
              getFileInfo(String fileid) { return uploaddao.getFileInfo(fileid); } // 删除磁盘文件 private boolean delDiskFile(String filename) { File file = new File(Path.UPLOAD_FILES + "\\" + filename); boolean suc = false; if (file.exists()) { suc = file.delete(); } return suc; }}