只是一个简短的jsp，想看看可以连得上不，可是白蒙蒙一片！
代码在这里
<%@ page pageEncoding="GBK" language="java" import="java.sql.*,entity.*,dao.*,dao.impl.*" %>
<html>
<head>
</head>
<body><div>
<table cellspacing="0" cellpadding="0" width="100%">
<%
for(int i=0;i<listTopic.size();i++){
Topic topic=(Topic)listTopic.get(i);%>
<tr>
<td style="font-size:16px">
<%=topic.getboardId()%></td>
</tr>
<%
}
%>
</table>
</div>
</body>
</html>
求大神指导
代码在这里
<%@ page pageEncoding="GBK" language="java" import="java.sql.*,entity.*,dao.*,dao.impl.*" %>
<html>
<head>
</head>
<body><div>
<table cellspacing="0" cellpadding="0" width="100%">
<%
for(int i=0;i<listTopic.size();i++){
Topic topic=(Topic)listTopic.get(i);%>
<tr>
<td style="font-size:16px">
<%=topic.getboardId()%></td>
</tr>
<%
}
%>
</table>
</div>
</body>
</html>
求大神指导
你这些的很霸气啊，不能这样写。一个import一个类，又不在同一个包下
首先的写一个测试类，测试一下你的dao是否能连接查询。
之后再在将页面关联，如果还是出问题，就看看报什么错！
dao没问题就是你的页面505的问题了
这个是：TopicDaoImpl
package dao.impl;import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;import entity.Topic;public class TopicDaoImpl extends BaseDao implements TopicDao {
private Connection conn=null;
private PreparedStatement pstmt=null;
private ResultSet rs=null; public int addTopic(Topic topic) {
return 0;
} public int deleteTopic(int topic) {
// TODO Auto-generated method stub
return 0;
} public int findCountTopic(int boardId) {
// TODO Auto-generated method stub
return 0;
} public List findListTopic(int page, int boardId) {
List list=new ArrayList();
int rowBegin=0;
if(page>1){
rowBegin=20*(page-1);
}
String sql="select top 20 * from TOPIC where boardId="+boardId
+"and topicId not in (select top"+rowBegin
+"topicId from TOPIC where boardId="+boardId
+"order by pblishTime desc)order by publishTime desc";
try{
conn=this.getConn();
pstmt=conn.prepareStatement(sql);
rs=pstmt.executeQuery();
while(rs.next()){
Topic topic=new Topic();
topic.setTopicId(rs.getInt("topicId"));
topic.setContent(rs.getString("content"));
topic.setPublishTime(rs.getDate("publishTime"));
topic.setuId(rs.getInt("uId"));
list.add(topic);
}
}
catch(Exception e){
e.printStackTrace();
}finally{
this.closeAll(conn, pstmt, rs);
}
return list;
} public Topic findTopic(int topicId) {
// TODO Auto-generated method stub
return null;
} public int updateTopic(Topic topic) {
// TODO Auto-generated method stub
return 0;
}}
这个是TOPIC
package entity;import java.util.Date;public class Topic {
private int topicId;
private String content;
private Date publishTime;
private int uId;
private int boardId;
public int getTopicId() {
return topicId;
}
public void setTopicId(int topicId) {
this.topicId = topicId;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public Date getPublishTime() {
return publishTime;
}
public void setPublishTime(Date publishTime) {
this.publishTime = publishTime;
}
public int getuId() {
return uId;
}
public void setuId(int uId) {
this.uId = uId;
}
public int getBoardId() {
return boardId;
}
public void setBoardId(int boardId) {
this.boardId = boardId;
}
public String toString(){
return this.topicId+"\t"+this.boardId+"\t"+this.uId+"\t"+this.content+"\t"+this.publishTime;
}
}这个是TOPICDAO
package dao.impl;import java.util.List;import entity.Topic;public interface TopicDao {
public int addTopic(Topic topic);
public int deleteTopic(int topic);
public int updateTopic(Topic topic);
public Topic findTopic(int topicId);
public List findListTopic(int page,int boardId);
public int findCountTopic(int boardId);}
麻烦你帮我写个test类，谢谢
{
public static void main(String[] args)
{
TopicDaoImpl dao = new TopicDaoImpl();
List topicList = dao.findListTopic(page, boardId);
//之后遍历一下topicList看能不能查到东西。
......
}
}别那么发代码，看起来好吃力，幸好不多。
我随便写写，大概就是这样
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;public class JDBCUtil {
public static final String DRIVERCLASSNAME ="oracle.jdbc.driver.OracleDriver";
public static final String URL = "jdbc:oracle:thin:@localhost:1521:accp";
public static final String USERNAME ="scott";
public static final String USERPWD = "tiger";
/**
* 加载驱动
*/
static{
try{
Class.forName(DRIVERCLASSNAME);
}catch(Exception e){
e.printStackTrace();
}
}
/**
* 新建一个连接
* @return
*/
public static Connection getConn(){
Connection conn = null;
try{
conn = DriverManager.getConnection(URL,USERNAME,USERPWD);
}catch(Exception e){
e.printStackTrace();
}
return conn;
}
/**
* 关闭连接
*/
public static void close(ResultSet rs,Statement st,Connection conn){
try{
if(rs!=null){
rs.close();
}
}catch(Exception e){
e.printStackTrace();
}finally{
try{
if(st!=null){
st.close();
}
}catch(Exception e){
e.printStackTrace();
}finally{
try{
if(conn!=null){
conn.close();
}
}catch(Exception e){
e.printStackTrace();
}
}
}
}
}
copy一下就可以了。不过我写的是Oracle数据库的，记得导包!
public static void main(String[] args){
Connection conn = JDBCUtil.getConn();
Sysout.out.print(conn);
}
不就可以测试连接是否可用了吗！
我也很菜的。
你不是吧，我给你的代码，那两个参数是你自己定义的，传什么你都不知道吗？
我给的只是demo，当然不能运行，大概的我都给你了，难道你不会填充吗？