📄 del.jsp
字号:
<%@ page contentType="text/html;charset=GB2312" %>
<%@ page import ="java.io.*" %>
<%@ page import ="java.util.*" %>
<HTML>
<BODY>
<%!
Hashtable hashtable=new Hashtable();
synchronized void removeGoodsToHashtable(String key)
{
hashtable.remove(key);
}
synchronized void putGoodsToHashtable(String key,String list)
{
hashtable.put(key,list);
}
%>
<%
String name=null,delete="";
String oldname=(String)session.getAttribute("name");
out.print("<BR> 输入要删除货物的货号：");
out.print("<FORM action=del.jsp method=get") ;
out.print("<P>货号：");
out.print("<INPUT type=text name=N value="+oldname+">");
out.print(" <INPUT type=submit name=del value=del>");
out.print("</FORM>");
name=request.getParameter("N");
delete=request.getParameter("del");
if(name==null)
{
name="have no any goods number";
}
byte c[]=name.getBytes("ISO-8859-1");
name=new String(c);
if(delete!=null)
{
if(delete.startsWith("del"))
{
try{
File f=new File("C:/","goods_name.txt");
FileInputStream in=new FileInputStream(f);
ObjectInputStream object_in=new ObjectInputStream(in);
hashtable=(Hashtable)object_in.readObject();
object_in.close();
in.close();
if(hashtable.containsKey(name))
{
removeGoodsToHashtable(name);
out.print("<BR>"+"货号："+name+"的信息被删除");
FileOutputStream o=new FileOutputStream(f);
ObjectOutputStream object_out=new ObjectOutputStream(o);
object_out.writeObject(hashtable);
object_out.close();
o.close();
}
else
{
out.print("<BR>"+"没有货号："+name+"记录");
}
}
catch(Exception ee){}
}
}
%>
<Table Border=2>
<tr>
<td>
<FORM action="Example4_11.jsp" method=post >
<INPUT type=submit value="录入界面">
</FORM>
</td>
<td>
<FORM action="showgoods.jsp" method=post >
<INPUT type=submit value="查看界面">
</FORM>
</td>
<td>
<FORM action="del.jsp" method=post >
<INPUT type=submit value="修改界面">
</FORM>
</td>
</Table>
</BODY>
</HTML>
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