| 如果你曾用vb編寫文件上傳的組件的話，那么用java編寫文件上傳的javabean十分容易。 下面的例子只是一個簡版 package yuanyifileup; import java.io.*; import java.util.*; import javax.servlet.*; import javax.servlet.http.*; import javax.servlet.jsp.pagecontext; public class yuanyifileup { private servletrequest request; private servletresponse response; private servletconfig config; servletinputstream data; int formsize; file f1; fileoutputstream os; datainputstream is; string filename; byte[] b; byte t; boolean flag=false; public yuanyifileup() { } public void initialize(servletconfig config,httpservletrequest request,httpservletresponse response) throws ioexception { this.request=request; this.response=response; this.config=config; data = request.getinputstream(); formsize=request.getcontentlength(); } public void initialize(pagecontext pagecontext) throws ioexception { request=pagecontext.getrequest(); response=pagecontext.getresponse(); config=pagecontext.getservletconfig(); data = request.getinputstream(); formsize=request.getcontentlength(); } public boolean setfilename(string s) { try { file f1=new file(s); os=new fileoutputstream(f1); } catch(ioexception e) {return(false);} return(true); } public void getbyte() { int i=0; try { is=new datainputstream(data); b=new byte[formsize]; while (true) { try { t=is.readbyte(); b[i]=t; i++; } catch(eofexception e) { break;} } is.close();} catch(ioexception e) {} } public boolean save() { int i=0,start1=0,start2=0; string temp=/"/"; if (!flag) { getbyte(); flag=true; } try { temp=new string(b,/"iso8859_1/"); } catch(unsupportedencodingexception e) {return(false);} start1=temp.indexof(/"image//"); temp=temp.substring(start1); start1=temp.indexof(/"http://r//n//r//n/"); temp=temp.substring(start1+4); start2=temp.indexof(/";//r//n/"); if (start2!=-1) { temp=temp.substring(0,start2); } try { byte[] img=temp.getbytes(/"iso8859_1/"); for (i=0;i<img.length;i++) { os.write(img[i]); } os.close(); } catch(ioexception e) {return(false);} return(true); } 如果有不明白的到論壇中發表意見 } |
新聞熱點
疑難解答
