记账本----3

今天做的是修改。

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<style>
    .a{
        margin-top: 20px;
    }
    .b{
        font-size: 20px;
        width: 160px;
        color: white;
        background-color: greenyellow;
    }
    .tb, td {
        border: 1px solid black;
        font-size: 22px;
    }
</style>
</head>
<body>
    <%
         Object message = request.getAttribute("message");
         if(message!=null && !"".equals(message)){
     
    %>
         <script type="text/javascript">
              alert("<%=request.getAttribute("message")%>");
         </script>
    <%} %>
    <div align="center">
        <h1 style="color: red;">账单信息列表</h1>
        <a href="index.jsp">返回主页</a>
        <table class="tb">
            <tr>
                <td>id</td>
                <td>账单类型</td>
                <td>年</td>
                <td>月</td>
                <td>日</td>
                <td>收入</td>
                <td>支出</td>
                <td align="center" colspan="2">操作</td>
            </tr>
            <c:forEach items="${bills}" var="item">
                <tr>
                    <td>${item.id}</td>
                    <td>${item.type}</td>
                    <td>${item.year}</td>
                    <td>${item.month}</td>
                    <td>${item.day}</td>
                    <td>${item.income}</td>
                    <td>${item.pay}</td>
                    <td><a href="BillServlet?method=getbillbyid2&id=${item.id}">修改</a></td>
                </tr>
            </c:forEach>
        </table>
    </div>
</body>
</html>

后面部分以后做。

dao层

public List<Bill> modifylist() {
        String sql = "select * from bill";
        List<Bill> modifylist = new ArrayList<>();
        Connection conn = DBUtil.getConn();
        Statement state = null;
        ResultSet rs = null;

        try {
            state = conn.createStatement();
            rs = state.executeQuery(sql);
            Bill bean = null;
            while (rs.next()) {
                int id = rs.getInt("id");
                String type2 = rs.getString("type");
                String year2 = rs.getString("year");
                String month2 = rs.getString("month");
                String day2 = rs.getString("day");
                String income2=rs.getString("income");
                String pay2=rs.getString("pay");
                bean = new Bill(id, type2, year2, month2,day2,income2,pay2);
                modifylist.add(bean);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            DBUtil.close(rs, state, conn);
        }
        
        return modifylist;
    }

servlet层

    private void getBillById2(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
            req.setCharacterEncoding("utf-8");
            int id = Integer.parseInt(req.getParameter("id"));
            Bill bill = dao.getBillById(id);
            req.setAttribute("bill", bill);
            req.getRequestDispatcher("modify.jsp").forward(req,resp);
            
        }
        
        
        private void modifylist(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{
            req.setCharacterEncoding("utf-8");
            List<Bill> bills = dao.modifylist();
            req.setAttribute("bills",bills);
            req.getRequestDispatcher("modifylist.jsp").forward(req,resp);
        }

这些只是能出现上图那个修改列表，点击修改进入修改界面。后续再完成。

猜你喜欢