命名无误，编码一致
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<form action="1.jsp" method="post">
<table border="1" align="center" width="600" style="margin-top:20px">
<tbody align="center"><tr>
<td width="160" height="40px">书本编号:</td>
<td><input type="text" name="in_bookid"></td></tr>
<tr>
<td width="160" height="40px">书本名称:</td>
<td width="160" height="40px"><input type="text" name="in_bookname"></td>
</tr>
<tr>
<td width="160" height="40px">作者:</td>
<td width="160" height="40px"><input type="text" name="in_bookwriter"></td></tr>
</tbody></table>
<table align="center" border="0" width="200" style="margin-top:20px">
<tr><td height="40px;" align="center">
<input type="submit" name="insert_btn">
</td></tr>
</table>
</form>
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%
int bookID=Integer.parseInt(request.getParameter("in_bookid"));
String bookname=request.getParameter("in_bookname");
String bookwriter=request.getParameter("in_bookwriter");
out.print(bookname);
%>