📄 input.jsp.bak
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<HTML>
<%@page contentType="text/html;charset=GB2312"%>
<%@page import="java.io.*" %>
<%@page import="java.util.*" %>
<BODY bgcolor=cyan><Font size=3>
<%! Hashtable hashtable=new Hashtable();
synchronized void putGoodsToHashtable(String key,String list)
{hashtable.put(key,list);}
synchronized void removeGoodsToHashtable(String key)
{hashtable.remove(key);}
%>
<% String name=request.getParameter("N");
if(name==null)name="have no goods number";
byte c[]=name.getBytes("ISO-8859-1");
name=new String(c);
String mount=request.getParameter("M");
if(mount==null)mount="have no any recoder";
byte d[]=mount.getBytes("ISO-8859-1");
mount=new String(d);
%>
<% File f=new File("d:/Tomcat/webapps/root/chap4","goods_name.txt");
if(f.exists())
{
try
{
FileInputStream in=new FileInputStream(f);
ObjectInputStream object_in=new ObjectInputStream(in);
hashtable=(Hashtable)object_in.readObject();
object_in.close();
in.close();
String temp=(String)hashtable.get(name);
if(temp==null)temp="";
if((temp.length())!=0)
{
out.print("<BR>"+"该货号已存在，您已经修改了数量");
String s="货号："+name+" ，数量："+mount;
removeGoodsToHashtable(name);
putGoodsToHashtable(name,s);
try
{
FileOutputStream o=new FileOutputStream(f);
ObjectOutputStream object_out=new ObjectOutputStream(o);
object_out.writeObject(hashtable);
object_out.close();
o.close();
}catch(Exception eee){}
}
else
{
String s="货号："+name+" ，数量："+mount;
putGoodsToHashtable(name,s);
try
{
FileOutputStream o=new FileOutputStream(f);
ObjectOutputStream object_out=new ObjectOutputStream(o);
object_out.writeObject(hashtable);
object_out.close();
o.close();
}catch(Exception eee){}
out.print("<BR>"+"您已经将货物存入文件");
out.print("<BR>"+"货物的货号："+name);
}
}catch(IOException e){}
}
else
{
String s="货号："+name+" ，数量："+mount;
putGoodsToHashtable(name,s);
try
{
FileOutputStream o=new FileOutputStream(f);
ObjectOutputStream object_out=new ObjectOutputStream(o);
object_out.writeObject(hashtable);
object_out.close();
o.close();
out.print("<BR>"+"您是第一个录入货物的人");
out.print("<BR>"+"货物的货号："+name);
}catch(Exception eee){}
}
%>
<FORM action="showgoods.jsp" method=post>
<P>查看库存情况
<BR><INPUT type="submit" value="去查看库存">
</FORM>
<A href="Example4_11.jsp"><BR>返回录入页面
</FONT>
</BODY>
</HTML>
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