Domino servlet下载附件

红太狼 2022-05-16 06:08 163阅读 0赞

Domino通过url打开附件内容方法

1）[http://xxx.yyy/abc.nsf/0/1A97B5BBA75AF8FC48257CAF00248EE4/$FILE/ls调用java.doc][http_xxx.yyy_abc.nsf_0_1A97B5BBA75AF8FC48257CAF00248EE4_FILE_ls_java.doc]

方法有个情况，如果是pdf或插件直接浏览器打开。

2)通过servlet打开，避免了方法1的打开问题。

js打开方法

window.open('/servlet/DownUrl?filePath='+encodeURI(filename)+'&dbpath='+dbpath+'&unid='+unid+'&num=0&id='+Math.random());

import java.io.BufferedInputStream;
    import java.io.BufferedOutputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.net.URLEncoder;
    import java.util.Enumeration;
    import java.util.Vector;
    
    import javax.servlet.ServletException;
    import javax.servlet.ServletOutputStream;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import lotus.domino.Database;
    import lotus.domino.Document;
    import lotus.domino.EmbeddedObject;
    import lotus.domino.NotesException;
    import lotus.domino.NotesFactory;
    import lotus.domino.NotesThread;
    import lotus.domino.RichTextItem;
    import lotus.domino.Session;
    
    
    public class DownUrl extends HttpServlet {
    
    	
    	public void doGet(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    
    		this.doPost(request, response);
    	}
    
    	//num  1为servlet动态添加，0为原文档
    	//window.open('/servlet/DownUrl?filePath='+encodeURI(filename)+'&dbpath='+dbpath+'&unid='+unid+'&num='+num+'&id='+Math.random());
    	
    	public void doPost(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    		
    		  String num=request.getParameter("num");             //1为servlet动态添加，0为原文档 
    		  String filePath = request.getParameter("filePath");  //文件名称 
    		  String dbpath= request.getParameter("dbpath");      //数据库路径 
    		  String unid= request.getParameter("unid");		  //文档unid
    		  if (filePath != null && num!=null) {
    		   //System.out.println("URLDecode filePath="+URLDecoder.decode(request.getParameter("filePath"), "UTF-8"));
    		   filePath = new String(request.getParameter("filePath").getBytes("ISO-8859-1"), "utf-8");
    		   System.out.println("filePath="+filePath);
    		   dbpath= new String(request.getParameter("dbpath").getBytes("ISO-8859-1"), "utf-8");
    		   System.out.println("dbpath-->"+dbpath);
    		   unid= new String(request.getParameter("unid").getBytes("ISO-8859-1"), "utf-8");
    		   System.out.println("unid-->"+unid); 
    		   num= new String(request.getParameter("num").getBytes("ISO-8859-1"), "utf-8");
    		  }else{
    		   response.setContentType("text/html;charset=GBK");
    		   response.getWriter().print("<script>alert('请求参数错误!');javascript:history.go(-1);</script>");
    		   return;
    		  }
    		  String mainPath = gethj()+"/domino/html/attached/";
    		  System.out.println("mainPath="+mainPath);
    		  //downLoadFromUrl(filePath,getFileName(filePath),mainPath);	
    		  String path=mainPath+filePath;
    		  try {
    			//如果为原文档提供附件
    			  if(num.equals("0")){
    				  SaveFile( dbpath,unid,path);
    			  }			
    		} catch (NotesException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		  
    		  //String path=filePath;		  
    		  //path="D:/jscss.rar";
    		  File file =new File(path);
    		  //File file3 = new File("D:/jscss.rar"); 
    		  System.out.println(file.getAbsolutePath());
    		  
    		  if(path.equals("")){
    		   System.out.println("文件不存在！");
    		   response.setContentType("text/html;charset=GBK");
    		   response.getWriter().print("<script>alert('文件不存在!');</script>");
    		   //response.getWriter().print("<script>window.opener.close();</script>");
    		   response.getWriter().print("<script>javascript:history.go(-1);</script>");
    		   return;
    		  }else{
    		   downloadFile(path, getFileName(path), response,num);
    		  }
    		  	 
    	}
    	
    	/*
    	 *  num //1为servlet动态添加，0为原文档 
    	 */
    	private static void downloadFile(String filePath, String fileName,
    			HttpServletResponse response,String num) throws IOException {
    		  //设置响应头和保存文件名 
    		  response.setContentType("APPLICATION/OCTET-STREAM;charset=gbk");
    		//  response.setContentType("application/x-msdownload");
    		  response.setHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(fileName, "UTF-8"));
    		 
    		  BufferedInputStream bis=null;
    		  BufferedOutputStream bos=null;
    		  try{
    			 
    		  
    		  ServletOutputStream sos=response.getOutputStream();
    		  bis=new BufferedInputStream(new FileInputStream(filePath));
    		  //bis=new BufferedInputStream(inputStream);
    		  bos=new BufferedOutputStream(sos);
    		  
    		  byte[] buffer=new byte[4096];
    		  int byteread;
    		  while(-1!=(byteread=bis.read(buffer,0,buffer.length))){
    		   bos.write(buffer, 0, byteread);
    		  }
    	
    		  }catch(IOException e){
    		   e.printStackTrace();
    		  }finally{
    		   if(bis!=null){
    		    bis.close();
    		   }
    		   if(bos!=null){
    		    bos.close();
    		   }
    		   System.out.println("关闭流！");
    		  }
    		  System.out.println("文件下载完毕.");
    		//如果为原文档提供附件
    		  if(num.equals("0")){
    			  deleteFile(filePath);
    		  }		  
    		 }
    	
    	//截取文件名称
    	 private String getFileName(String filePath){
    	  int  index1=filePath.lastIndexOf("/");
    	  int  index2=filePath.lastIndexOf("\\");
    	  int index=(index1>index2)?index1:index2;
    	  return filePath.substring(index+1);
    	 }
    	 
    	 /** 
         * 从输入流中获取字节数组 
         * @param inputStream 
         * @return 
         * @throws IOException 
         */  
        public static  byte[] readInputStream(InputStream inputStream) throws IOException {    
            byte[] buffer = new byte[1024];    
            int len = 0;    
            ByteArrayOutputStream bos = new ByteArrayOutputStream();    
            while((len = inputStream.read(buffer)) != -1) {    
                bos.write(buffer, 0, len);    
            }    
            bos.close();    
            return bos.toByteArray();    
        } 
        
        
        
        /**
    	 * 从网络Url中下载文件
    	 * @param urlStr
    	 * @param fileName
    	 * @param savePath
    	 * @throws IOException
    	 */
    	public static void  downLoadFromUrl(String urlStr,String fileName,String savePath) throws IOException{
    		URL url = new URL(urlStr);  
    		HttpURLConnection conn = (HttpURLConnection)url.openConnection();  
                    //设置超时间为3秒
    		conn.setConnectTimeout(3*1000);
    		//防止屏蔽程序抓取而返回403错误
    		conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
     
    		//得到输入流
    		InputStream inputStream = conn.getInputStream();  
    		//获取自己数组
    		byte[] getData = readInputStream(inputStream);    
     
    		//文件保存位置
    		File saveDir = new File(savePath);
    		if(!saveDir.exists()){
    			saveDir.mkdir();
    		}
    		File file = new File(saveDir+File.separator+fileName);    
    		FileOutputStream fos = new FileOutputStream(file);     
    		fos.write(getData); 
    		if(fos!=null){
    			fos.close();  
    		}
    		if(inputStream!=null){
    			inputStream.close();
    		}
     
     
    		System.out.println("info:"+url+" download success"); 
     
    	}
    	
    	public String gethj(){		
    	    try {
    	    	//创建NotesThread对象
    		    NotesThread.sinitThread(); 
    		    //创建新会话对象
    			Session session = NotesFactory.createSession();	
    			String temp= session.getEnvironmentString("Directory", true);
    			session.recycle();
    			return temp;
    		} catch (NotesException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    			System.out.println("操作异常");
    		    System.out.println(e.toString());
    		    return "";
    		}  
    		 finally
    	      {
    	        NotesThread.stermThread();
    	      }
    	}
     
    	
    	/**
    	 * 
    	 * @param dbpath 数据库路径
    	 * @param unid 文档unid
    	 * @param filepath 文件完整路径
    	 * @throws NotesException
    	 */
    	public void SaveFile(String dbpath,String unid,String filepath) throws NotesException{
    		NotesThread.sinitThread(); 
    		Session session = NotesFactory.createSession();  
    		System.out.println("1111");
    		Database db = session.getDatabase("", dbpath);
    		System.out.println("unid-->"+unid);
    	    System.out.println("database-->"+db.getFileName());
    	
    	    Document doc =  db.getDocumentByUNID(unid);
    	    System.out.println("doc-->"+doc.getUniversalID());
    	    RichTextItem body = (RichTextItem) doc.getFirstItem("Body");
            if (body != null) {
    
            	//如果新旧附件同名
            	
            		 System.out.println("进入附件名称与新附件名称相同-->");
    		          Vector v = body.getEmbeddedObjects();
    		          Enumeration e = v.elements();
    		          
    		          while (e.hasMoreElements()) {
    		            EmbeddedObject eo = (EmbeddedObject) e.nextElement();
    		            if (eo.getType() == EmbeddedObject.EMBED_ATTACHMENT) {		            		//判断 有同样的附件
    		            	System.out.println("eo.getName()附件名称-->"+eo.getName());			              
    		            	//eo.remove();
    		            	deleteFile(filepath);
    		            	eo.extractFile(filepath);
    			            break;
    		            }
    		          }
    		          /*while结束*/
            	}else{
            		System.out.println("文档没有对应的Body富域，建议附件文档时，附件在富域Body里面!");
            	}
            //回收对象
            db.recycle();
            session.recycle();
            NotesThread.stermThread();
    	}
    	
    	 /**
         * 删除单个文件
         * @param   sPath    被删除文件的文件名
         * @return 单个文件删除成功返回true，否则返回false
         */
        public static boolean deleteFile(String sPath) {
           boolean flag = false;
           File file = new File(sPath);
            // 路径为文件且不为空则进行删除
            if (file.isFile() && file.exists()) {
                file.delete();
                flag = true;
            }
            return flag;
        }
     
    	
    
    }

参考：

[https://blog.csdn.net/woshiwxw765/article/details/6653476][https_blog.csdn.net_woshiwxw765_article_details_6653476]

[http_xxx.yyy_abc.nsf_0_1A97B5BBA75AF8FC48257CAF00248EE4_FILE_ls_java.doc]: http://ibmx366:8000/kpoa/app/hoa_flowtest.nsf/0/1A97B5BBA75AF8FC48257CAF00248EE4/$FILE/ls%E8%B0%83%E7%94%A8java.doc
[https_blog.csdn.net_woshiwxw765_article_details_6653476]: https://blog.csdn.net/woshiwxw765/article/details/6653476