Servlet跳转到jsp页面出现404

toward_south 2018-03-26 01:16:16

我通过Servlet读取数据库的信息，然后传到jsp的页面上，出现了404怎么解决？
代码如下：
FindServlet代码：

package jdbcConnection;



import java.io.IOException;

import java.io.PrintWriter;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.ArrayList;

import java.util.List;



import javax.servlet.RequestDispatcher;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;



import org.apache.jasper.tagplugins.jstl.core.Out;



import com.mysql.jdbc.Connection;

import com.mysql.jdbc.Statement;







/**

 * Servlet implementation class UpdateServlet

 */

@WebServlet("/FindServlet")

public class FindServlet extends HttpServlet {

	private static final long serialVersionUID = 1L;

       

    /**

     * @see HttpServlet#HttpServlet()

     */

    public FindServlet() {

        super();

        // TODO Auto-generated constructor stub

    }



    /**

	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

	 */

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		// TODO Auto-generated method stub

		doGet(request, response);

	}



	/**

	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

	 */

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		// TODO Auto-generated method stub

		//response.getWriter().append("Served at: ").append(request.getContextPath());

		//PrintWriter out=response.getWriter();

		try{

			Class.forName("com.mysql.jdbc.Driver");

			String url="jdbc:mysql://localhost:3306/javaweb?useSSL=false";

			String username="root";

			String password="1223360222";

			Connection conn=(Connection) DriverManager.getConnection(url,username,password);

			Statement stmt=(Statement) conn.createStatement();

			String sql="SELECT * FROM tb_bbok";

			//out.print("hello world");

			ResultSet rs=stmt.executeQuery(sql);

			List<Book>list=new ArrayList<Book>();

			while(rs.next()){

				Book book=new Book();

				book.setId(rs.getInt("id"));

				book.setName(rs.getString("name"));

				//out.println(rs.getInt("id"));

				book.setPrice(rs.getFloat("price"));

				book.setBookCount(rs.getInt("bookcount"));

				//out.println(rs.getInt("bookcount")+111);

				book.setAuthor(rs.getString("author"));

				list.add(book);

			}

			request.setAttribute("list", list);

			rs.close();

			stmt.close();

			conn.close();

			//out.close();

		}catch(ClassNotFoundException ex){

			ex.printStackTrace();

		}catch(SQLException ex){

			ex.printStackTrace();

		}

		RequestDispatcher rd=request.getRequestDispatcher("bookQuery.jsp");

		rd.forward(request, response);

	}

}

bookQuery.jsp代码：

<%@ page language="java" contentType="text/html; charset=utf-8"

    pageEncoding="utf-8"%>

<%@ page import="java.util.List" %>

<%@ page import="jdbcConnection.Book" %>

<%@ page import="jdbcConnection.ConnectOption" %>

<%@ page import="jdbcConnection.FindServlet" %>

<!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=gbk">

<title>查询书籍</title>

</head>

<body>

<%request.setCharacterEncoding("utf-8"); %>

<table align="center" width="450" border="1">

	<tr>

		<td align="center" colspan="6">

		<h2>所有图书信息</h2>

		</td>

	</tr>

	<tr align="center">

		<td><b>ID</b></td>

		<td><b>图书名称</b></td>

		<td><b>价格</b></td>

		<td><b>数量</b></td>

		<td><b>作者</b></td>

		<td><b>修改数量</b></td>

	</tr>

	<%

		//获取图书集合

		//ConnectOption co=new ConnectOption();

		//ist<Book>list=co.Query();

		List<Book>list=(List<Book>)request.getAttribute("list");

		String names=(String)request.getAttribute("name");

		out.print(names+"111");

		if(list == null || list.size()<1){

			out.print("没有数据");

		}

		else{

			for(Book book :list){

	%>

			<tr align="center">

				<td><%=book.getId() %></td>

				<td><%=book.getName() %></td>

				<td><%=book.getPrice() %></td>

				<td><%=book.getBookCount() %></td>

				<td><%=book.getAuthor() %></td>

				<td>

					<form action="UpdateServlet" method="post" onsubmit="return check(this)">

						<input type="hidden" name="id" value="<%=book.getId() %>">

						<input type="text" name="bookCount" size="3">

						<input type="submit" value="修改">

					</form>

				</td>

			</tr>

		<% 

			}

		}

		%>



</table>

</body>

</html>