记账本------4

修改的后半部分内容。

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!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;}
</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: cyan;">记账信息修改</h1><a href="index.jsp">返回主页</a><form action="BillServlet?method=modify" method="post" οnsubmit="return check()"><div class="a">账单类型<input type="text" id="type" name="type" value="${bill.type}"/></div><div class="a">年<input type="text" id="year" name="year" value="${bill.year}"/></div><div class="a">月<input type="text" id="month" name="month" value="${bill.month}"/></div><div class="a">日<input type="text" id="day" name="day" value="${bill.day}"/></div><div class="a">收入<input type="text" id="income" name="income" value="${bill.income}"/></div><div class="a">支出<input type="text" id="pay" name="pay" value="${bill.pay}"/></div><input type="hidden" id="id" name="id" value="${bill.id}"/><div class="a"><button type="submit" class="b">修&nbsp;&nbsp;&nbsp;改</button></div></form></div></body>
</html>

dao层到目前为止所有的

package com.bill.dao;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;import com.bill.util.DBUtil;
import com.bill.been.Bill;
@SuppressWarnings("unused")
public class BillDao {
//-----------------------------------------------------------------------------------------------------------------------------public boolean add(Bill bill) {String sql = "insert into bill(type,year,month,day,income,pay) values('" + bill.getType() + "','" + bill.getYear() + "','"+bill.getMonth()+"','"+bill.getDay()+"','"+bill.getIncome()+"','"+bill.getPay()+"')";Connection conn = DBUtil.getConn();//调用方法连接数据库Statement state = null;boolean f = false;int a = 0 ;try {       //监视大括号内的代码state = conn.createStatement();a = state.executeUpdate(sql);} catch (Exception e) {     //捕获错误
            e.printStackTrace();} finally {//关闭z    连接
            DBUtil.close(state, conn);}if (a > 0) {f = true;}return f;}//----------------------------------------------------------------------------------------------------------------------------
    public Bill getBillById(int id) {String sql = "select * from bill where id ='" + id + "'";Connection conn = DBUtil.getConn();Statement state = null;ResultSet rs = null;Bill bill = null;try {state = conn.createStatement();rs = state.executeQuery(sql);while (rs.next()) {String type = rs.getString("type");String year = rs.getString("year");String month = rs.getString("month");String day = rs.getString("day");String income = rs.getString("income");String pay = rs.getString("pay");bill = new Bill(id, type, year, month,day,income,pay);}} catch (Exception e) {e.printStackTrace();} finally {DBUtil.close(rs, state, conn);}return bill;}public List<Bill> dellist() {String sql = "select * from bill";List<Bill> dellist = 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);dellist.add(bean);}} catch (SQLException e) {e.printStackTrace();} finally {DBUtil.close(rs, state, conn);}return dellist;}public boolean delete (int id) {boolean f = false;String sql = "delete from bill where id='" + id + "'";Connection conn = DBUtil.getConn();Statement state = null;int a = 0;try {state = conn.createStatement();a = state.executeUpdate(sql);} catch (SQLException e) {e.printStackTrace();} finally {DBUtil.close(state, conn);}if (a > 0) {f = true;}return f;}
//--------------------------------------------------------------------------------------------------------------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;}public boolean modify(Bill bill) {String sql = "update bill set type='" + bill.getType() + "', year='" + bill.getYear() + "',month='" + bill.getMonth()+ "',day='"+bill.getDay()+"',income='"+bill.getIncome()+"',pay='"+bill.getPay()+"'where id='" + bill.getId() + "'";Connection conn = DBUtil.getConn();Statement state = null;boolean f = false;int a = 0;try {state = conn.createStatement();a = state.executeUpdate(sql);} catch (SQLException e) {e.printStackTrace();} finally {DBUtil.close(state, conn);}if (a > 0) {f = true;}return f;}

servlet层到目前位置所有的

package com.bill.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 com.bill.dao.BillDao;
import com.bill.been.Bill;
@WebServlet("/BillServlet")
public class BillServlet extends HttpServlet{private static final long serialVersionUID = 1L;public BillServlet() {super();}BillDao dao=new BillDao();protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {req.setCharacterEncoding("utf-8");String method = req.getParameter("method");if ("add".equals(method)) {add(req, resp);}else if ("getbillbyid".equals(method)) {getBillById(req, resp);}else if ("dellist".equals(method)) {dellist(req,resp);}else if ("delete".equals(method)) {delete(req,resp);}else if ("getbillbyid2".equals(method)) {getBillById2(req, resp);}else if ("modifylist".equals(method)) {modifylist(req,resp);}else if ("modify".equals(method)) {modify(req,resp);}else if ("search".equals(method)) {search(req,resp);}}
//------------------------------------------------------------------------------------------------------private void add(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {// TODO Auto-generated method stubString type = req.getParameter("type");String year = req.getParameter("year");String month = req.getParameter("month");String day = req.getParameter("day");String income = req.getParameter("income");String pay = req.getParameter("pay");Bill bill=new Bill(type,year,month,day,income,pay);if(dao.add(bill)) {req.setAttribute("message", "保存成功!");req.getRequestDispatcher("add.jsp").forward(req, resp);}else {req.setAttribute("message", "保存失败!");req.getRequestDispatcher("add.jsp").forward(req, resp);}}//------------------------------------------------------------------------------------------------------
        private void getBillById(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("delete.jsp").forward(req,resp);}private void dellist(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {req.setCharacterEncoding("utf-8");List<Bill> bills = dao.dellist();req.setAttribute("bills", bills);req.getRequestDispatcher("dellist.jsp").forward(req,resp);}private void delete(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{req.setCharacterEncoding("utf-8");int id = Integer.parseInt(req.getParameter("id"));dao.delete(id);req.setAttribute("message", "删除成功");req.getRequestDispatcher("index.jsp").forward(req,resp);}
//---------------------------------------------------------------------------------------------------------------------------------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);}private void modify(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException{req.setCharacterEncoding("utf-8");int id = Integer.parseInt(req.getParameter("id"));String type = req.getParameter("type");String year = req.getParameter("year");String month = req.getParameter("month");String day = req.getParameter("day");String income = req.getParameter("income");String pay = req.getParameter("pay");Bill bill = new Bill(id, type, year, month,day,income,pay);dao.modify(bill);req.setAttribute("message", "修改成功");req.getRequestDispatcher("BillServlet?method=modifylist").forward(req,resp);}

效果展示

转载于:https://www.cnblogs.com/birdmmxx/p/10409430.html

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