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>> 用JSP编写文件上传 [<a href=http://www.jsp001.com/forum/showthread.php?goto=newpost&threadid=64>查看别人的评论</a>]<br>
<hr><p>由 webmaster 发布于: 2001-01-20 16:42</p><p> </p><p>袁毅：2000-10-23 <br><br><br>如果你曾用VB编写文件上传的组件的话，那么用JAVA编写文件上传的JAVABEAN十分容易。<br>下面的例子只是一个简版<br>package yuanyifileup;<br>import java.io.*;<br>import java.util.*;<br>import javax.servlet.*;<br>import javax.servlet.http.*;<br>import javax.servlet.jsp.PageContext;<br><br>public class yuanyifileup<br>{<br>private ServletRequest request;<br>private ServletResponse response;<br>private ServletConfig config;<br>ServletInputStream DATA;<br>int FormSize;<br>File f1;<br>FileOutputStream os;<br>DataInputStream is;<br>String filename;<br>byte[] b;<br>byte t;<br>boolean flag=false;<br>public yuanyifileup()<br>{ }<br>public void initialize(ServletConfig config,HttpServletRequest request,HttpServletResponse response) throws IOException<br>{<br>this.request=request;<br>this.response=response;<br>this.config=config;<br>DATA = request.getInputStream();<br>FormSize=request.getContentLength();<br>}<br>public void initialize(PageContext pageContext) throws IOException<br>{<br>request=pageContext.getRequest();<br>response=pageContext.getResponse();<br>config=pageContext.getServletConfig();<br>DATA = request.getInputStream();<br>FormSize=request.getContentLength();<br>}<br>public boolean setFilename(String s)<br>{<br>try<br>{<br>File f1=new File(s);<br>os=new FileOutputStream(f1);<br>}<br>catch(IOException e)<br>{return(false);}<br>return(true);<br>}<br>public void getByte()<br>{<br>int i=0;<br>try<br>{<br>is=new DataInputStream(DATA);<br>b=new byte[FormSize];<br><br>while (true)<br>{<br>try<br>{<br>t=is.readByte();<br>b[i]=t;<br>i++;<br>}<br>catch(EOFException e)<br>{ break;}<br>}<br>is.close();}<br>catch(IOException e)<br>{}<br>}<br><br>public boolean save()<br>{<br>int i=0,start1=0,start2=0;<br>String temp="";<br>if (!flag)<br>{<br>getByte();<br>flag=true;<br>}<br>try<br>{<br>temp=new String(b,"ISO8859_1");<br>}<br>catch(UnsupportedEncodingException e)<br>{return(false);}<br><br>start1=temp.indexOf("image/");<br>temp=temp.substring(start1);<br><br>start1=temp.indexOf("\r\n\r\n");<br><br>temp=temp.substring(start1+4);<br>start2=temp.indexOf(";\r\n");<br>if (start2!=-1)<br>{<br>temp=temp.substring(0,start2); <br>}<br>try<br>{<br>byte[] img=temp.getBytes("ISO8859_1");<br>for (i=0;i<img.length;i++)<br>{ os.write(img[i]); }<br>os.close();<br>}<br>catch(IOException e)<br>{return(false);}<br><br>return(true);<br><br>}<br>如果有不明白的发E-Mail:yymailbox@263.net.Bye <br><br>} <br><br></p></td>
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