JSP组件commons-fileupload实现文件上传
本文实例为大家分享了JSP使用commons-fileupload实现文件上传代码,供大家参考,具体内容如下
1、准备:
将commons-fileupload-1.1.zip和commons-io-1.1.zip复制到"\WEB-INF\lib"目录下
2、首先是Servlet:FileUpload.java
packageservlet; importjava.io.File; importjava.io.IOException; importjava.io.PrintWriter; importjava.util.*; importjava.util.regex.Pattern; importjava.util.regex.Matcher; importjavax.servlet.ServletException; importjavax.servlet.http.HttpServlet; importjavax.servlet.http.HttpServletRequest; importjavax.servlet.http.HttpServletResponse; importorg.apache.commons.fileupload.FileItem; importorg.apache.commons.fileupload.FileUploadException; importorg.apache.commons.fileupload.disk.DiskFileItemFactory; importorg.apache.commons.fileupload.servlet.ServletFileUpload; publicclassFileUploadextendsHttpServlet{ privateStringuploadPath="E:\\addnetFile\\";//要上传文件的目录 privateFiletempPath=newFile("E:\\tempFile\\");//存放上传的文件的目录 publicvoiddoGet(HttpServletRequestrequest,HttpServletResponseresponse) throwsServletException,IOException{ } publicvoiddoPost(HttpServletRequestrequest,HttpServletResponseresponse) throwsServletException,IOException{ response.setContentType("text/html;charset=GB2312"); response.setCharacterEncoding("gb2312"); PrintWriterout=response.getWriter(); out.println("请求内容的长度为:"+request.getContentLength()); out.println("请求内容的类型为:"+request.getContentType()); DiskFileItemFactoryfactory=newDiskFileItemFactory(); factory.setRepository(tempPath); factory.setSizeThreshold(4096); ServletFileUploadupload=newServletFileUpload(factory); upload.setSizeMax(1000000); List<?>fileitems=null; try{ fileitems=upload.parseRequest(request); Iterator<?>iterator=fileitems.iterator(); Stringregex=".+\\\\(.+)$"; String[]errortype={".exe",".com",".cgi",".asp"}; Patternp=Pattern.compile(regex); while(iterator.hasNext()){ FileItemitem=(FileItem)iterator.next(); if(!item.isFormField()){ Stringname=item.getName(); longsize=item.getSize(); if(name==null||name.equals("")&&size==0) continue; Matcherm=p.matcher(name); if(m.find()){ for(inttemp=0;temp<errortype.length;temp++){ if(m.group(1).endsWith(errortype[temp])) thrownewIOException(name+":wrongtype"); } try{ item.write(newFile(tempPath,m.group(1))); out.println(name+""+size+"<br/>"); out.println("上传成功"); }catch(Exceptione){ out.println("333"+e); } } else{ thrownewIOException("failtoupload"); } } } }catch(IOExceptione){ out.println("222"+e); } catch(FileUploadExceptione1){ e1.printStackTrace(); out.println("111"+e1); } } publicvoidinit()throwsServletException{ if(!newFile(uploadPath).isDirectory()) newFile(uploadPath).mkdir(); if(!tempPath.isDirectory()) tempPath.mkdir(); } publicvoiddestroy(){ super.destroy(); } }
3、其次是html:Uploadfile.html
<!DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.01Transitional//EN"> <html> <head> <title>Uploadfilel.html</title> <metahttp-equiv="keywords"content="keyword1,keyword2,keyword3"> <metahttp-equiv="description"content="thisismypage"> <metahttp-equiv="content-type"content="text/html;charset=UTF-8"> <!--<linkrel="stylesheet"type="text/css"href="./styles.css">--> </head> <body> <formaction="/Firstjsp/servlet/FileUpload"method="post"enctype="multipart/form-data"name="form1"> <inputtype="file"name="file"/> <inputtype="submit"name="submit"value="upload"/> </form> <formaction="/Firstjsp/servlet/FileUpload"method="post"enctype="multipart/form-data"name="uploadform"> <table> <tr> <td> 文件1:<inputtype="file"name="X"size="40"/> </td> </tr> <tr> <td> 文件2:<inputtype="file"name="Y"size="40"/> </td> </tr> <tr> <td> 文件3:<inputtype="file"name="Z"size="40"/> </td> </tr> </table> <inputtype="submit"name="upload"value="开始上传"/> </form> </body> </html>
4、最后是配置web.xml
<servlet> <description>ThisisthedescriptionofmyJ2EEcomponent</description> <display-name>ThisisthedisplaynameofmyJ2EEcomponent</display-name> <servlet-name>FileUpload</servlet-name> <servlet-class>servlet.FileUpload</servlet-class> </servlet> <servlet-mapping> <servlet-name>FileUpload</servlet-name> <url-pattern>/servlet/FileUpload</url-pattern>
首先运行html,servlet处理上传请求
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持毛票票。