标签：coding 文章 inpu catch todo javabean 直接 replace nbsp
原先写在CSDN的一篇，我直接扒过来吧。之前打算在CSDN的，结果写了几回，发现他那个发布系统简直烂到家，经常丢失图片各种。所以很长一段时间我也没写什么。
一、MVC模式
1、M : javabean;
2、V : jsp;
3、C : servlet;
4、DB：MySQL；
二、文件夹
三、项目内容
1、建立数据库并封装数据库操作
create database testDB; use testDB; create table user ( id int auto_increment primary key, username varchar(20), password varchar(20), phone varchar(20), addr varchar(225) );
/** * 封装数据库操作 * 包括对javabean存储的操作； */ import java.sql.*; import com.yck.mvc.bean.User; public class DB { static { try { Class.forName("com.mysql.jdbc.Driver"); } catch (ClassNotFoundException e) { e.printStackTrace(); } } public static Connection getConnection() { Connection connection = null; try { connection = DriverManager.getConnection("jdbc:mysql://localhost/testdb?user=root&password=yck940522"); } catch (SQLException e) { e.printStackTrace(); } return connection; } public static void closeConnection(Connection connection) { try { if(connection != null) { connection.close(); connection = null; } } catch (SQLException e) { e.printStackTrace(); } } public static PreparedStatement preparedStatement(Connection connection,String sql) { PreparedStatement preparedStatement = null; try { preparedStatement = connection.prepareStatement(sql); } catch (SQLException e) { e.printStackTrace(); } return preparedStatement; } public static void closePreparedStatement(PreparedStatement preparedStatement) { try { if(preparedStatement != null) { preparedStatement.close(); preparedStatement = null; } } catch (SQLException e) { e.printStackTrace(); } } public static Statement createStatement(Connection connection) { Statement statement = null; try { statement = connection.createStatement(); } catch (SQLException e) { e.printStackTrace(); } return statement; } public static void closeStatement(Statement statement) { try { if(statement != null) { statement.close(); statement = null; } } catch (SQLException e) { e.printStackTrace(); } } public static ResultSet getResultSet(Statement statement,String sql) { ResultSet resultSet = null; try { resultSet = statement.executeQuery(sql); } catch (SQLException e) { e.printStackTrace(); } return resultSet; } public static void closeResultSet(ResultSet resultSet) { try { if(resultSet != null) { resultSet.close(); resultSet = null; } } catch (SQLException e) { e.printStackTrace(); } } //构造在数据库中存储User的方法 public static void saveUser(User u) { Connection connection = null; PreparedStatement preparedStatement = null; try { connection = DB.getConnection(); String sql = "insert into user values(null,?,?,?,?)"; preparedStatement = DB.preparedStatement(connection, sql); preparedStatement.setString(1, u.getUsername()); preparedStatement.setString(2, u.getPassword()); preparedStatement.setString(3, u.getPhone()); preparedStatement.setString(4, u.getAddr()); preparedStatement.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } } }
2、建立Model：封装User
public class User { private String username; private String password; private String phone; private String addr; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public String getAddr() { return addr; } public void setAddr(String addr) { this.addr = addr; } }
3 建立View：写jsp页面
1）register.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>注册用户</title> </head> <body> <form name="regiserForm" action="http://localhost:8080/MVC/RegisterServlet" method = "post"> <table id="registerTableId" align="center"> <tr> <td colspan="2" align="center">用户注册</td> </tr> <tr> <td>用户名</td> <td><input id="usernameId" type="text" name="username"></td> <td><span id="usernameTipId"></span></td> </tr> <tr> <td>密码</td> <td><input id="passwordId" type="password" name="password"></td> <td><span id="passwordTipId"></span></td> </tr> <tr> <td>密码确认</td> <td><input id="password2Id" type="password" name="password2"></td> <td><span id="password2TipId"></span></td> </tr> <tr> <td>手机号码</td> <td><input id="phoneId" type="text" name="phone"></td> <td><span id="phoneTipId"></span></td> </tr> <tr> <td>地址</td> <td><textarea id="addrId" name="addr" rows="3" cols="25"></textarea></td> </tr> <tr> <td><input id="registerSubmitId" type="submit" value="提交"></td> <td><input id="registerResetId" type="reset" value="重置"></td> </tr> </table> </form> </body> </html>
2）registerInfo.jsp 显示注册信息
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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>注册成功</title> </head> <body> <jsp:useBean id="registerUser" class="com.yck.mvc.bean.User" scope="session"></jsp:useBean> <table id="registerInfoId" align="center"> <tr><td colspan="2" align="center">用户信息</td></tr> <tr> <td>用户名</td> <td> <jsp:getProperty property="username" name="registerUser"/></td> </tr> <tr> <td>手机号码</td> <td> <jsp:getProperty property="phone" name="registerUser"/></td> </tr> <tr> <td>地址</td> <td> <jsp:getProperty property="addr" name="registerUser"/></td> </tr> </table> </body> </html>
4、建立Control层：写servlet
RegisterServlet
import java.io.IOException;
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.yck.mvc.DButil.DB;
import com.yck.mvc.bean.User;
/**
* Servlet implementation class RegisterServlet
*/
@WebServlet("/RegisterServlet")
public class RegisterServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public RegisterServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
doPost(request,response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
request.setCharacterEncoding("utf-8");
try
{
String username = request.getParameter("username");
String password = request.getParameter("password");
String phone = request.getParameter("phone");
String addr = request.getParameter("addr");
User u = new User();
u.setUsername(username);
u.setPassword(password);
u.setPhone(phone);
u.setAddr(addr);
DB.saveUser(u);
request.getSession().setAttribute("registerUser", u);
request.getRequestDispatcher("registerInfo.jsp").forward(request, response);
} catch (Exception e)
{
e.printStackTrace();
}
}
}
那边也没有测试的结果图，我猜肯定是挂了。CSDN毛病特别多，作者甚至不能预览自己写的东西。提交之后在审核的过程中，点击自己的文章就是报错，所以我都是写完就丢那
基于jsp+servlet+javabean的MVC模式简单应用
标签：coding 文章 inpu catch todo javabean 直接 replace nbsp
原文地址：http://www.cnblogs.com/yeyeck/p/7434409.html
