转账系统设计——Servlet技术JavaBean技术Jsp技术

1、 转账系统设计 Servlet技术 JavaBean技术 Jsp技术 Java web 转账系统设计完整代码 1，登陆界面：login.jsp代码如下： base href= My JSP login.jsp starting page !- 欢迎进入账户登陆界面！ 账户名： 密码： 2，注册界面amountAdd.jsp代码如下： base href= My JSP amountAdd.jsp starting page !- 注 册 新 账 户 界 面 账户名： 密码： 单击注册按钮单击添加账户资金：进入增加资金界面增加资金界面amountMoneyAdd.jsp base href= M

2、y JSP amountMoneyAdd.jsp starting page !- 增 加 资 金 界 面 账户名： 增加资金： 密码： 再次注册新账户：如有再次注册则注册失败：添加资金20000：查询全部账户：核心业务转账功能：4 删除界面 amountDelete.jsp如果没有账户名，则删除失败！代码如下： base href= My JSP amountDelete.jsp starting page !- 账户删除界面 账户名： 密码： 再次登录账户 幽居望竹清风 账户不存在：业务Servlet类如下：Login.Java 登录验证数据库核心类package servlet;impo

3、rt java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import pojo.amount;import dao.amountDao;publi

4、c class login extends HttpServlet /* * The doGet method of the servlet. * * This method is called when a form has its tag value method equals to get. * * param request the request send by the client to the server * param response the response send by the server to the client * throws ServletExceptio

5、n if an error occurred * throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException this.doPost(request, response);public void doPost(HttpServletRequest request, HttpServletResponse response)throws Servlet

6、Exception, IOException request.setCharacterEncoding(UTF-8); response.setCharacterEncoding(UTF-8);/没有设置编码的话，中文登陆不了 response.setContentType(text/html);PrintWriter out = response.getWriter();String amountName=request.getParameter(amountName);String amountPwd=request.getParameter(pwd);amount am=amountDa

7、o.login(amountName, amountPwd);if(am=null)response.sendRedirect(login.jsp);elseHttpSession session=request.getSession();/得到一个会话 session.setAttribute(amountName, amountName);/会话传递参数 request.getRequestDispatcher(/servlet/amountData).forward(request, response); /页amountAdd 账户增加核心业务类package servlet;impo

8、rt java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import pojo.amount;import dao.amou

9、ntDao;public class amountAdd extends HttpServlet /* * The doGet method of the servlet. * * This method is called when a form has its tag value method equals to get. * * param request the request send by the client to the server * param response the response send by the server to the client * throws

10、ServletException if an error occurred * throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException this.doPost(request, response);/* * The doPost method of the servlet. * * This method is called when a for

11、m has its tag value method equals to post. * * param request the request send by the client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */public void doPost(HttpServletRequest re

12、quest, HttpServletResponse response)throws ServletException, IOException request.setCharacterEncoding(UTF-8); response.setCharacterEncoding(UTF-8); response.setContentType(text/html);PrintWriter out = response.getWriter();String amountName=request.getParameter(amountName);String pwd=request.getParam

13、eter(pwd);List amounts=new ArrayList();/查找账户名是否存在数据库中，存在则重新输入账户名amount am1=amountDao.login(amountName,pwd);/调用持久类中的方法amount am2=amountDao.login(amountName);/*System.out.print(amounts.get(1).getName()*+amounts.get(0).getName();*/if(am1!=null|.equals(amountName)|am2!=null)response.sendRedirect(./amoun

14、tAddFailure.jsp);/重定向else/*amounts2.clear();*/ amountDao.amountInsert(amountName, pwd); amounts=amountDao.getAmountData(amountName); out.println();out.println();out.println( 账户数据界面);out.println( );out.print();out.print(账户数据);out.print(账户名金钱);for(amount am:amounts) out.print(+am.getName()+am.getMoney

15、()+);out.println( );out.print(删除 );/*out.print(转账 );*/out.print(返回登录界面 );out.print(转账界面 );out.print(index.jsp );out.print(查询全部账户 );out.print(删除账户 );out.print(增加账户资金 );out.print(注册 );out.println( );out.println();out.flush();out.close();amountChange 转账系统转账核心类package servlet;import java.io.IOException;

16、import java.io.PrintWriter;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import pojo.amount;import dao.amountDao;public class amountChange extends HttpServle

17、t public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException this.doPost(request, response);public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException String amountName=request.getParameter(amo

18、untName); String aimAmountName=request.getParameter(aimAmountName); String amountMoney =request.getParameter(money); request.setCharacterEncoding(UTF-8); response.setCharacterEncoding(UTF-8); response.setContentType(text/html); PrintWriter out = response.getWriter(); if(amountMoney.isEmpty()|amountN

19、ame.isEmpty()|aimAmountName.isEmpty() response.sendRedirect(./amountChange.jsp); else/ List amounts=amountDao.amountChange(amountName, aimAmountName, amountMoney);/* List amounts1=amountDao.getAmountData(amountName);*/ List amounts1=amountDao.getAmountData(amountName); out.print(转账前账户有资金：amounts1.ge

20、t(0).getMoney()=+amounts1.get(0).getMoney();if(amounts1.get(0).getMoney()=0) amountDao.amountChange(aimAmountName,amountName, amountMoney);/转账业务/转账业务out.print(账户+amountName+没有足够资金！不能转账！);elseamountDao.amountChange(amountName, aimAmountName, amountMoney);/转账业务 List amounts=amountDao.getAmountView();/

21、*out.println(集合对象是否为空：+amounts.isEmpty();*/out.println();out.println();out.println( 账户数据界面);out.println( );out.print();out.print(账户数据);out.print(账户名金钱);for(amount am:amounts)/集合循环调用if(am.getMoney()=0)am.setMoney(0); out.print(+am.getName()+am.getMoney()+); out.println( );out.print(删除 );/*out.print(转

22、账 );*/out.print(返回登录界面 );out.print(转账界面 );out.print(index.jsp );out.print(查询全部账户 );out.print(amountName+amountName);out.print(aimAmountName+aimAmountName);out.print(amountMoney=+amountMoney);out.println( );out.println();out.flush();out.close(); 单账户数据显示类：amountData.Javapackage servlet;import java.io.

23、IOException;import java.io.PrintWriter;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import pojo.amount;import dao.amou

24、ntDao;public class amountData extends HttpServlet /* * The doGet method of the servlet. * * This method is called when a form has its tag value method equals to get. * * param request the request send by the client to the server * param response the response send by the server to the client * throws

25、 ServletException if an error occurred * throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException this.doPost(request, response);/* * The doPost method of the servlet. * * This method is called when a fo

26、rm has its tag value method equals to post. * * param request the request send by the client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */public void doPost(HttpServletRequest r

27、equest, HttpServletResponse response)throws ServletException, IOException HttpSession session=request.getSession();/得到会话ID，会话Id是系统分配的唯一标识 String amountName=(String) session.getAttribute(amountName);/必须强制转换字符型； if(amountName=null|.equals(amountName) response.sendRedirect(index.jsp);/重定向登陆界面 else/* am

28、ountName=amountName.substring(0,5); /*/Listamounts=amountDao.getAmountData(amountName);/调用持久类中的方法 request.setCharacterEncoding(UTF-8); response.setCharacterEncoding(UTF-8); response.setContentType(text/html);PrintWriter out = response.getWriter();/*out.println(集合对象是否为空：+amounts.isEmpty();*/out.print

29、ln();out.println();out.println( 账户数据查询界面);out.println( );out.print();out.print(账户数据);out.print(账户名金钱);for(amount am:amounts) out.print(+am.getName()+am.getMoney()+); out.println( );/*out.print(删除 );*/*out.print(转账 );*/out.print(返回登录 );out.print(转账 );out.print(添加账户资金 );out.print(删除账户资金 );out.print(添加

30、账户 );out.print(删除账户 );out.print(查询全部账户 );out.println( );out.println();out.flush();out.close();账户删除类：amountDelete.javapackage servlet;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.

31、HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import pojo.amount;import dao.amountDao;public class amountDelete extends HttpServlet /* * The doGet method of the servlet. * * This method is called when a form has its tag value method equals to

32、get. * * param request the request send by the client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)thr

33、ows ServletException, IOException this.doPost(request, response);/* * The doPost method of the servlet. * * This method is called when a form has its tag value method equals to post. * * param request the request send by the client to the server * param response the response send by the server to th

34、e client * throws ServletException if an error occurred * throws IOException if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException String amountName=request.getParameter(amountName);String pwd=request.getParameter(pwd)

35、;/*amount am=amountDao.login(amountName, pwd);*/List amounts=new ArrayList();amount am1=amountDao.login(amountName, pwd);if(am1=null)response.sendRedirect(./amountDeleteFailure.jsp);elseamountDao.amountDelete(amountName); amounts=amountDao.getAmountView();response.setContentType(text/html);PrintWrit

36、er out = response.getWriter();out.println();out.println();out.println( 账户数据界面);out.println( );out.print();out.print(账户数据);out.print(账户名金钱);for(amount am:amounts) out.print(+am.getName()+am.getMoney()+);out.println( );/*out.print(删除 );*/*out.print(转账 );*/out.print(返回登录界面 );out.print(转账界面 );out.print(

37、注册 );out.print(查询全部账户 );out.println( );out.println();out.flush();out.close();账户资金增加类：amountMoneyAdd.javapackage servlet;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;i

38、mport javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import pojo.amount;import dao.amountDao;public class amountMoneyAdd extends HttpServlet /* * The doGet method of the servlet. * * This method is called when a form has its tag value method equals to get. * * pa

39、ram request the request send by the client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws Servlet

40、Exception, IOException this.doPost(request, response);/* * The doPost method of the servlet. * * This method is called when a form has its tag value method equals to post. * * param request the request send by the client to the server * param response the response send by the server to the client *

41、throws ServletException if an error occurred * throws IOException if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException String amountName=request.getParameter(amountName); String pwd=request.getParameter(pwd); String m

42、oney=request.getParameter(money); /检查账户名是否存在，不存在则不能添加资金 amount am1= amountDao.login(amountName,pwd); List amounts=new ArrayList(); if(am1=null) response.sendRedirect(./amountMoneyAdd.jsp);/重定向到添加资金界面 else amountDao.amountMoneyAdd(amountName, pwd, money);/添加账户资金 amounts= amountDao.getAmountData(amoun

43、tName); response.setContentType(text/html);PrintWriter out = response.getWriter();out.println();out.println();out.println( 账户数据查询界面);out.println( );out.print();out.print(账户数据);out.print(账户名金钱);for(amount am:amounts)/集合循环调用out.print(+am.getName()+am.getMoney()+);out.println( );out.print(删除 );/*out.pr

44、int(转账 );*/out.print(返回登录界面 );out.print(转账界面 );out.print(index.jsp );out.print(返回 );out.print(注册 );out.print(查询全部账户 );out.println( );out.println();out.flush();out.close();账户数据全部显示类：amountView.javapackage servlet;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import

45、java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import dao.amountDao;import pojo.amount;public class amountView extends HttpServlet /* * The doGet method of the servl

46、et. * * This method is called when a form has its tag value method equals to get. * * param request the request send by the client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */p

47、ublic void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException this.doPost(request, response);/* * The doPost method of the servlet. * * This method is called when a form has its tag value method equals to post. * * param request the request send by th

48、e client to the server * param response the response send by the server to the client * throws ServletException if an error occurred * throws IOException if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException request.se

49、tCharacterEncoding(UTF-8); response.setCharacterEncoding(UTF-8);response.setContentType(text/html);PrintWriter out = response.getWriter();List amounts=amountDao.getAmountView();out.println();out.println();out.println( 账户数据查询界面);out.println( );out.print();out.print(账户数据);out.print(账户名金钱);for(amount a

50、m:amounts)/集合循环调用out.print(+am.getName()+am.getMoney()+);out.println( );/*out.print(删除 );*/*out.print(转账 );*/out.print(返回登录界面 );out.print(转账界面 );out.print(index.jsp );out.print(删除账户 );out.print(增加账户资金 );out.print(注册 );out.print(查询全部账户 );out.println( );out.println();out.flush();out.close();Pojo类：pack

51、age pojo;public class amount private String name;private int money;private String pwd;public String getPwd() return pwd;public void setPwd(String pwd) this.pwd = pwd;public String getName() return name;public void setName(String name) = name;public int getMoney() return money;public void setMoney(in

52、t money) this.money = money;数据库持久核心业务类amountDao.java方法视图：package dao;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import java.sql.SQLException;import java.util.ArrayList;import java.util.List;import pojo.amount;import util.connectionFactory;public class amou

53、ntDao /检查账户是否存在,参数为账户名，密码public static amount login(String amountName,String amountPwd)amount am=null; String sql=select * from 账户表 where 账户=? and 密码=?;Connection conn=null;/连接数据库接口PreparedStatement pre=null;/预处理接口ResultSet rs=null;/结果集接口try conn=connectionFactory.getConnection();/Connection对象为Sql借口

54、pre=conn.prepareStatement(sql);pre.setString(1, amountName);pre.setString(2, amountPwd);/* rs=pre.executeQuery();/返回结果集对象* /*if(rs.next()am=new amount();am.setName(rs.getString(账户);am.setPwd(rs.getString(密码);am.setMoney(rs.getInt(金钱);mit(); catch (SQLException e) / TODO Auto-generated catch blocke.p

55、rintStackTrace();finallyCloseAll(rs,pre,conn);return am;public static amount login(String amountName)amount am=null; String sql=select * from 账户表 where 账户=?;Connection conn=null;/连接数据库接口PreparedStatement pre=null;/预处理接口ResultSet rs=null;/结果集接口try conn=connectionFactory.getConnection();/Connection对象为

56、Sql借口pre=conn.prepareStatement(sql);pre.setString(1, amountName);/*pre.setString(2, amountPwd);*/* rs=pre.executeQuery();/返回结果集对象* /*if(rs.next()am=new amount();am.setName(rs.getString(账户);/*am.setPwd(rs.getString(密码);am.setMoney(rs.getInt(金钱);*/mit(); catch (SQLException e) / TODO Auto-generated ca

57、tch blocke.printStackTrace();finallyCloseAll(rs,pre,conn);return am;/显示一种账户名的数据，而不是全部数据public static List getAmountData(String amountName)Connection conn=null;/连接数据库接口PreparedStatement pre=null;/预处理接口ResultSet rs=null;/结果集接口 String sql=select * from 账户表 where 账户=?; List amounts=new ArrayList(); amou

58、nt am=null; try conn=connectionFactory.getConnection();pre=conn.prepareStatement(sql);pre.setString(1, amountName);rs=pre.executeQuery();/*while(rs.next()am=new amount();am.setName(rs.getString(账户);am.setPwd(rs.getString(密码);am.setMoney(rs.getInt(金钱);amounts.add(am); catch (SQLException e) / TODO Au

59、to-generated catch blocke.printStackTrace();finallyCloseAll(rs,pre,conn);return amounts;public static List getAmountView()/显示账户名的数据，是全部数据Connection conn=null;/连接数据库接口PreparedStatement pre=null;/预处理接口ResultSet rs=null;/结果集接口 String sql=select * from 账户表 ; List amounts=new ArrayList(); amount am=null;

60、 try conn=connectionFactory.getConnection();pre=conn.prepareStatement(sql);rs=pre.executeQuery();while(rs.next()am=new amount();am.setName(rs.getString(账户);am.setPwd(rs.getString(密码);am.setMoney(rs.getInt(金钱);amounts.add(am); catch (SQLException e) / TODO Auto-generated catch blocke.printStackTrace(