5-2查询问题

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" import="cn.imooc.b.*,cn.imooc.b.*,java.util.*"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<%
   String basePath=request.getScheme()+"://"+request.getServerName()+":"+
                 request.getServerPort()+request.getContextPath();
%>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>图书查询</title>
<script type="text/javascript" src="<%=basePath%>/resources/js/jquery-1.4.2.js"></script>
</head>
<body>
	<center>
		<h1>图书查询</h1>
		<p>
			图书ID：<input type="text" name="bookID">
			图书名：<input type="text" name="bookName">
			分类：<input type="text" name="catgoryName">
			<input type="button" value="查询" id="search">
		</p>
		<hr>
		<table width="800px" cellspacing="0px" cellpadding="0px" border="1px">
			<thead>
				<tr>
					<th>图书ID</th>
					<th>书名</th>
					<th>分类</th>
					<th>价格</th>
					<th>描述</th>
				</tr>
			</thead>
			<%
			LibDaolmpl ld=new LibDaolmpl();
			List list=ld.getBooks();
			List<Book>list2=(List<Book>)this.getServletContext().getAttribute("bookList");
			if(list2==null){
			for(int i=0;i<list.size();i++){
			Book book=(Book)list.get(i);
			%>
			<tbody id="cont">
			
					<tr>
						<td><%=book.getId() %></td>
						<td><%=book.getName() %></td>
						<td><%=book.getClassName() %></td>
						<td><%=book.getPrice() %></td>
						<td><%=book.getDescription() %></td>
					</tr>
				
			</tbody>
			<%} 
			}else{
				for(int i=0;i<list2.size();i++){
					Book book=(Book)list2.get(i);
			%>
			<tbody id="cont">
				
					<tr>
						<td><%=book.getId() %></td>
						<td><%=book.getName() %></td>
						<td><%=book.getClassName() %></td>
						<td><%=book.getPrice() %></td>
						<td><%=book.getDescription() %></td>
					</tr>
				
			</tbody>
			<%
				}
				}
			%>
		</table>
	</center>
</body>
<script type="text/javascript">
  $("#search").click(function(){
	  $.ajax({
		 url:"<%=basePath%>/SearchServlet",
		 type:"post",
		 data:{
			 bookID:$("input[name=bookID]").val(),
			 bookName:$("input[name=bookName]").val(),
			 catgoryName:$("input[name=catgoryName]").val()
		 },
		 dataType:"json",
		 success:function(result){
			 
		 }
	  });
  })
</script>
</html>

package cn.imooc.servlet;

import java.io.IOException;
import java.util.List;

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.json.JSONObject;

import cn.imooc.b.Book;
import cn.imooc.b.LibDaolmpl;

public class SearchServlet extends HttpServlet {

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String bookID=request.getParameter("bookID");
		String bookName=request.getParameter("bookName");
		String catgoryName=request.getParameter("catgoryName");
		LibDaolmpl ld=new LibDaolmpl();
		List<Book>list=ld.getBooksByCondition(bookID, bookName, catgoryName);
		this.getServletContext().setAttribute("bookList", list);
		request.getRequestDispatcher(request.getContextPath()+"/showBooks.jsp");
		System.out.println("Search"+bookID);
		System.out.println("search"+list.toString());
//		JSONObject jsonObject=new JSONObject("{flag:false}");
//		response.getOutputStream().write(jsonObject.toString().getBytes("utf-8"));
	}

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

}

慕的地1361556 2018-06-24

源自：监听器 2-5 作业题