# **jsp指令項目中的運用**
此處是查詢
jsp頁面代碼
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%--導入java.util.*所有的包--%>
<%@ page import="java.util.*" %>
<%--導入Computer--%>
<%@ page import="computeServlet.Computer" %>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href="addCom.jsp">新增</a>
<form>
<table border="1" cellpadding="0" cellspacing="0" style="font-style: center">
<tr>
<td>
<input type="button" value="全選" onclick="selAll()"/>
<input type="button" value="全不選" onclick="selNoAll()"/>
</td>
<td>品牌</td>
<td>型號</td>
<td>出廠日期</td>
<td>類型</td>
<td>適用人羣</td>
<td>計算機顏色</td>
<td>產品說明</td>
</tr>
<%
//通過request.getAttribute獲取信息
//comListJsp與servlet中的setAttribute中返回的保持一致
List<Computer> com = (List<Computer>)request.getAttribute("comListJsp");
//通過for循環查詢展示所有信息
for(Computer c:com){
%>
<tr>
<td><input type="checkbox" name="check" value="<%=c.getcId() %>"/></td>
<td><%=c.getcBrand() %></td>
<td><%=c.getcProductModel()%></td>
<td><%=c.getcMadeDate() %></td>
<td><%=c.getcComType() %></td>
<td><%=c.getcApplyToPeople()%></td>
<td><%=c.getcColor()%></td>
<td><%=c.getcComExplain()%></td>
<td><input type="button" value="刪除" onclick="delStu(<%=c.getcId() %>)"/></td>
<td><input type="button" value="修改" onclick="toUpdateStu(<%=c.getcId() %>)"/></td>
</tr>
<%
}
%>
</table>
</form>
</body>
**servlet**
public class ComListServlet extends HttpServlet{
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// TODO Auto-generated method stub
doPost(req, resp);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse resp) throws ServletException, IOException {
//設置字符編碼
request.setCharacterEncoding("utf-8");
ComputeDao cd = new ComputeDao();
List<Computer> comList = cd.comList();
//把值放到request中，這樣在前臺獲取到的值
//stuListJsp頁面獲取值用它來獲取
//stuList 放值的list集合
request.setAttribute("comListJsp", comList);
request.getRequestDispatcher("comList.jsp").forward(request, resp);
}
}
jsp指令項目中的運用
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