求助:新闻发布系统的问题(搞了半天也不知道是哪里出问题了)
//插入二级标题
<%@ page contentType= "text/html; charset=GBK " %>
<%@ page import= "java.util.ArrayList,news.FirstLevelTitle,news.FirstLevelTitleDAO " %>
<%!
FirstLevelTitleDAO fd=new FirstLevelTitleDAO();
FirstLevelTitle ft=new FirstLevelTitle();
ArrayList list1=fd.show1();
%>
<table width= "760 " border= "1 " cellspacing= "0 " cellpadding= "0 " align= "center ">
<tr>
<td height= "140 " colspan= "2 "> <img src= "pic/321.jpg " width= "760 " height= "140 " alt= " "> </td>
</tr>
<tr>
<td width= "210 " height= "400 " valign= "top "> <br> <b> 新闻发布后台管理 </b>
<br> <a href= "FirstTitle.jsp "> 一级标题发布 </a>
<br> 二级标题及文件位置发布 </td>
<td width= "550 " height= "400 ">
<table width= "550 " border= "0 " cellspacing= "0 " cellpadding= "0 ">
<tr>
<td> <center> <b> <center> 二级标题及文件位置发布 </center> </b> <br> <br>
<form method= "post " action= "secondinsert ">
<table> <tr> <td> 一级标题： </td> <td>
<select name= "first ">
<%
for(int i=0;i <list1.size();i++){
ft=(FirstLevelTitle)list1.get(i);
%>
<option value= " <%=ft.getTitleName()%> "> <%=ft.getTitleName()%> </option>
<%}
%>
</select> </td> </tr>
<tr> <td> 二级标题： </td> <td> <input type= "text " name= "secondname "> </td> </tr>
<tr> <td> 文件位置： </td> <td> <input type= "file " name= "filepath "> </td> </tr>
<tr> <td> </td> <td> <input type= "submit " value= "确定 "> <input type= "reset " value= "重置 "> </td> </tr>
</table>
</form>
<br> （二级标题最好与新闻稿件标题一致）
<br> <br> <b> 注意：发布前请认真检查输入的内容是否正确。 </b>
</center> </td>
</tr>
</table>
</td>
</tr>
</table>
package news;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.Connection;
import java.sql.SQLException;
public class SecondInsert extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK ";
//Initialize global variables
public void init() throws ServletException {
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
response.setContentType(CONTENT_TYPE);
PrintWriter out = response.getWriter();
request.setCharacterEncoding( "GBK ");
String first=request.getParameter( "first ");
String secondname=request.getParameter( "secondname ");
String filepath=request.getParameter( "filepath ");
Connection con=null;
Statement st=null;
ResultSet rs=null;
if(first!=null&&!first.equals( " ")&&secondname!=null&&!secondname.equals( " ")&&filepath!=null&&!filepath.equals( " ")){
con=DBConnection.getCon();
try {
st = con.createStatement();
rs = st.executeQuery(
"select * from SecondLevelTitle where titlename= ' " +
secondname + " ' ");
if (!rs.next()) {
st.executeUpdate( "insert into SecondLevelTitle values ( ' " +
secondname + " ', ' " +
filepath + " ',default, ' " + first + " ' ");
out.print( " <font color= 'red '> 二级标题及文件位置发布成功！ </font> ");
} else {
out.print( " <font color= 'red '> 不能重复发布同一标题！ </font> ");
}
} catch (SQLException ex) {
ex.toString();
}
try {
rs.close();
st.close();
con.close();
} catch (SQLException ex1) {
ex1.printStackTrace();
out.print( "一级标题： " + first);
out.print( " <br> 二级标题： " + secondname);
out.print( " <br> 文件位置： " + filepath);
}
}else{
out.print( " <font color= 'red '> 请填写完整！ </font> ");
out.print( " <br> 一级标题： "+first);/*这里打印的first,secondname和filepath都为空(?)*/
out.print( " <br> 二级标题： "+secondname);
out.print( " <br> 文件位置： "+filepath);
}
out.close();
}
//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
doGet(request, response);
}
//Clean up resources
public void destroy() {
}
}
不知道为什么,一级标题可以插入,二级标题总是得到null,明明插入一级标题的代码和插入二级标题的代码差不多呀,还有一个不理解的地方是一级标题插入后要重新编译,才会在插入二级标题的下拉列表中出现一级标题
[解决办法]
还有一个不理解的地方是一级标题插入后要重新编译,才会在插入二级标题的下拉列表中出现一级标题
-------------
这个好说，因为你不重新编译，默认还是会使用上次产生的CLASS文件，除非你把原来的CLASS文件删除，这样应该会自动重编译了。
至于一级和二级的问题，我现在在外面上网，不便细看。留给有时间的朋友帮你解决吧
[解决办法]
给你发个我做的
留个油箱
[解决办法]
也给我发一个，谢谢
pozhong@163.com
[解决办法]
..
[解决办法]
留个油箱
灌油
[解决办法]
也给我发一个，谢谢
zhanglijiapz@163.com
