我有SQLLite数据库。 DB的连接在SQLite.java类中。在ProductPage.jsp中,我创建了此类的实例。 错误是“SQLite无法解析为某种类型”。我使用Tomcat服务器。屏幕截图已附上。你能帮帮我吗?
SQLite.java
import java.sql.Connection;
import java.sql.DriverManager;
public class SQLite {
Connection con =null;
public static Connection getConnection(){
try{
//Class.forName("org.sqlite.JDBC");
//adjust database path
Connection cn = DriverManager.getConnection("jdbc:sqlite:Lab_4.sqlite");
System.out.println("Connection successful");
return cn;
}catch(Exception e){
System.out.println("Error "+e.getMessage());
return null;
}
}
}
ProductPage.jsp
<%@page import="java.sql.Connection"%>
<%@page import="java.sql.PreparedStatement"%>
<%@page import="java.sql.ResultSet"%>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Product Table</title>
</head>
<body>
<% Connection cn=new SQLite.getConnection();
String pid, name, price, stock, comments;
String query = ("SELECT * FROM T_PRODUCT");
PreparedStatement pstmt = cn.prepareStatement(query);
//pstmt.setInt(1, 2);
ResultSet rs = pstmt.executeQuery(); %>
<table border="2">
<tr>
<td>Product ID</td>
<td>Product Name</td>
<td>Product Price</td>
<td>Product Stock</td>
<td>Product Comments</td>
</tr>
<%
try
{
while(rs.next())
{%>
<tr><td><%out.println(rs.getInt("Prd_ID")); %></td></tr>
<tr><td><%out.println(rs.getString("Prd _Name")); %></td></tr>
<tr><td><%out.println(rs.getInt("Prd _Price")); %></td></tr>
<tr><td><%out.println(rs.getInt("Prd _Stock")); %></td></tr>
<tr><td><%out.println(rs.getString("Prd _Comments")); %></td></tr>
<%
}
%>
</table>
<%
cn.close();
}
catch(Exception e)
{
e.printStackTrace();
}
%>
</body>
</html>
答案 0 :(得分:0)
您可以尝试通过SQLite.java
标记导入<page>
课程,即将以下内容添加到ProductPage.jsp
的开头:
<%@ page import="SQLite" %>
如果你的SQLite.java
课程实际上有一个包裹(你没有告诉我们),那么请使用:
<%@ page import="package.SQLite" %>
请注意,许多人认为导入JSP是不好的做法,它被认为违反了良好的MVC原则。