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import java.io.*; import javax.servlet.ServletInputStream; import javax.servlet.http.HttpServletRequest; public class transfer_multi { public String[] sourcefile = new String[255];//源文件名 public String objectpath = "c:/";//目标文件目录 public String[] suffix = new String[255];//文件后缀名 public String[] objectfilename = new String[255];//目标文件名 public ServletInputStream sis = null;//输入流 public String[] description = new String[255];//描述状态 public long size = 100*1024;//限制大小 private int count = 0;//已传输文件数目 private byte[] b = new byte[4096];//字节流存放数组 private boolean successful = true; public void setSourcefile(HttpServletRequest request) throws java.io.IOException{ sis = request.getInputStream(); int a = 0; int k = 0; String s = ""; while((a = sis.readLine(b,0,b.length)) != -1){ s = new String(b,0,a); if((k = s.indexOf("filename=")) != -1){ s = s.substring(k+10); k = s.indexOf("""); s = s.substring(0,k); sourcefile[count] = s; k = s.lastIndexOf("."); suffix[count] = s.substring(k+1); System.out.println(suffix[count]); if(canTransfer(count)) transferfile(count); } if(!successful) break; } } public int getCount(){ return count; } public String[] getSourcefile(){ return sourcefile; } public void setObjectpath(String objectpath){ this.objectpath = objectpath; } public String getObjectpath(){ return objectpath; } private boolean canTransfer(int i){ suffix[i] = suffix[i].toLowerCase(); //这个是我用来传图片的，各位可以把后缀名改掉或者不要这个条件 if(sourcefile[i].equals("")||(!suffix[i].equals("gif")&&!suffix[i].equals("jpg")&&!suffix[i].equals("jpeg"))) {description[i]="ERR suffix is wrong";return false;} else return true; } private void transferfile(int i){ String x = Long.toString(new java.util.Date().getTime()); try{ objectfilename[i] = x+"."+suffix[i]; FileOutputStream out = new FileOutputStream(objectpath+objectfilename[i]); int a = 0; int k = 0; long hastransfered = 0;//标示已经传输的字节数 String s = ""; while((a = sis.readLine(b,0,b.length)) != -1){ s = new String(b,0,a); if((k = s.indexOf("Content-Type:")) != -1) break; } sis.readLine(b,0,b.length); while((a = sis.readLine(b,0,b.length)) != -1){ s = new String(b,0,a); if((b[0]==45)&&(b[1]==45)&&(b[2]==45)&&(b[3]==45)&&(b[4]==45)) break; out.write(b,0,a); hastransfered+=a; if(hastransfered>=size){ description[count] = "ERR The file "+sourcefile[count]+" is too large to transfer. The whole process is interrupted."; successful = false; break; } } if(successful) description[count] = "Right The file "+sourcefile[count]+" has been transfered successfully."; ++count; out.close(); if(!successful){ sis.close(); File tmp = new File(objectpath+objectfilename[count-1]); tmp.delete(); } } catch(IOException ioe){ description[i]=ioe.toString(); } } public transfer_multi(){ //可以在构建器里面构建服务器上传目录，也可以在javabean调用的时候自己构建 setObjectpath("/home/www/jspvhost4/web/popeyelin/images/"); } } 返回类别: 教程 上一教程: JSP技巧篇-防止浏览器快取网页 下一教程: JAVA中调用外部命令 您可以阅读与"推荐个上传文件的JAVABEAN给大家"相关的教程: · JSP实现上传文件的两种方式 · JavaBean实现多文件上传的两种方式 · JAVABEAN实现多文件上传的两种方式 · 一个文件上传JAVABEAN · 用STRUTS上传多个文件的方式 |
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