jsp+Servlet+javaBean實現登入和註冊
阿新 • • 發佈：2019-01-04
目錄：
資料庫設計：
CREATE SCHEMA `student` ;
CREATE TABLE `student`.`user` (
`id` INT NOT NULL AUTO_INCREMENT ,
`user` VARCHAR(45) NOT NULL ,
`pwd` VARCHAR(45) NOT NULL ,
`name` VARCHAR(45) NOT NULL ,
`xxx` VARCHAR(45) NOT NULL ,
`age` INT NOT NULL ,
PRIMARY KEY (`id`) );資料庫互動介面：
web.xml
<servlet> <servlet-name>loginServlet</servlet-name> <servlet-class>servlet.loginServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>loginServlet</servlet-name> <url-pattern>/loginServlet</url-pattern> </servlet-mapping> <servlet> <servlet-name>addUserServlet</servlet-name> <servlet-class>servlet.addUserServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>addUserServlet</servlet-name> <url-pattern>/addUserServlet</url-pattern> </servlet-mapping>
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>歡迎來到學生管理系統</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> </head> <body> <div align="center"> <font size=" 2" color="#FF6633">使用者登入</font> </div> <form id="form1" name="form1" method="post" action="loginServlet"> <table width="357" border="0" align="center"> <tr> <td width="128">使用者名稱：</td> <td width="219"><label> <input name="user" type="text" id="user" /> </label></td> </tr> <tr> <td>密 碼：</td> <td><label> <input name="pwd" type="password" id="pwd" /> </label></td> </tr> <tr> <td><label> <input type="submit" name="Submit" value="登入" /> </label></td> <td><label><a href="addUser.jsp">使用者註冊</a> </label></td> </tr> </table> <p> </p> </form> </body> </html>
介面：
addUser.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>使用者註冊</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> </head> <body> <p align="center"> <font size=" 3" color="#FF3300">使用者註冊</font> </p> <form id="form1" name="form1" method="post" action="addUserServlet"> <table width="340" border="0" align="center"> <tr> <td width="141">使用者名稱：</td> <td width="189"><label> <input name="user" type="text" id="user" /> </label></td> </tr> <tr> <td>密碼：</td> <td><label> <input name="pwd" type="password" id="pwd" /> </label></td> </tr> <tr> <td>重輸密碼：</td> <td><label> <input name="pwd1" type="password" id="pwd1" /> </label></td> </tr> <tr> <td>姓名：</td> <td><label> <input name="name" type="text" id="name" /> </label></td> </tr> <tr> <td>性別：</td> <td><label> <input name="xxx" type="radio" value="男" checked="checked" /> 男 <input type="radio" name="xxx" value="女" /> 女</label></td> </tr> <tr> <td>年齡：</td> <td><label> <input name="age" type="text" id="age" /> </label></td> </tr> <tr> <td><label> <input type="submit" name="Submit" value="提交" /> </label></td> <td><label> <input type="reset" name="Submit2" value="重置" /> </label></td> </tr> </table> </form> </body> </html>
介面：
User.java
package bean;
public class User {
private String user;
private String pwd;
private String name;
private String xxx;
private int age;
public String getUser() {
return user;
}
public void setUser(String user) {
this.user = user;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getxxx() {
return xxx;
}
public void setxxx(String xxx) {
this.xxx = xxx;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}DAO.java
package dao;
import getConnection.GetConnection;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.mysql.jdbc.*;
import bean.User;
public class DAO {
private Connection conn;
private PreparedStatement pstat;
String sql = "";
/**
*
* 使用者登入
*/
public boolean logoin(User user) throws SQLException {
conn = GetConnection.getConnection();
boolean i = false;
sql = "select * from user where user=? and pwd=?";
pstat = conn.prepareStatement(sql);
pstat.setString(1, user.getUser());
pstat.setString(2, user.getPwd());
ResultSet rs1 = (ResultSet) pstat.executeQuery();
if (rs1.next()) {
i = true;
rs1.close();
pstat.close();
} else {
i = false;
rs1.close();
pstat.close();
}
conn.close();
return i;
}
/**
* 使用者註冊
*/
public void addUser(User user) {
conn = GetConnection.getConnection();
sql = "insert into user values(?,?,?,?,?,?)";
try {
pstat = conn.prepareStatement(sql);
pstat.setString(1, null);
pstat.setString(2, user.getUser());
pstat.setString(3, user.getPwd());
pstat.setString(4, user.getName());
pstat.setString(5, user.getxxx());
pstat.setInt(6, user.getAge());
pstat.executeUpdate();
pstat.close();
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}GetConnection.java
package getConnection;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
/**
*
* 用JDBC的方法獲得資料庫的連線
*
*/
public class GetConnection {
// 通過靜態方法註冊驅動，獲得連線
public static Connection getConnection() {
String driver = "com.mysql.jdbc.Driver";
String url = "jdbc:mysql://localhost/student";
Connection con = null;
try {
Class.forName(driver);
try {
con = DriverManager.getConnection(url, "root", "root");
} catch (SQLException e) {
e.printStackTrace();
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
System.out.println("已獲得資料庫的連線");
return con;
}
/*
* public static void main(String args[]){ getConnection(); }
*/
}loginServlet.java
package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import dao.DAO;
import bean.User;
public class loginServlet extends HttpServlet {
public void destory() {
super.destroy();
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String name = new String(request.getParameter("user").getBytes(
"ISO8859_1"), "GBK");
String pwd = new String(request.getParameter("pwd").getBytes(
"ISO8859_1"), "utf-8");
User user = new User();
user.setUser(name);
user.setPwd(pwd);
DAO dao = new DAO();
boolean isLogin;
try {
isLogin = dao.logoin(user);
if (isLogin) {
response.sendRedirect("MYJSP.jsp");
} else {
response.sendRedirect("index.jsp");
}
} catch (SQLException e) {
e.printStackTrace();
}
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void init() throws ServletException {
}
}
addUserServlet.java
package servlet;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import dao.DAO;
import bean.User;
public class addUserServlet extends HttpServlet {
/**
* Destruction of the servlet.
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
String user1 = request.getParameter("user");
String pwd = request.getParameter("pwd");
String name = new String(request.getParameter("name").getBytes(
"ISO8859_1"), "utf-8");
String xxx = new String(request.getParameter("xxx").getBytes(
"ISO8859_1"), "utf-8");
String age1 = request.getParameter("age");
User user = new User();
user.setUser(user1);
user.setPwd(pwd);
user.setName(name);
user.setxxx(xxx);
int age;
if (age1 != null) {
age = Integer.parseInt(age1);
user.setAge(age);
}
DAO dao = new DAO();
dao.addUser(user);
request.setAttribute("info", new String(" 新增成功！恭喜！！" + " "));
request.setAttribute("id", new String("a"));
request.setAttribute("denglu", new String(" 登陸"));
request.getRequestDispatcher("info.jsp").forward(request, response);
}
public void init() throws ServletException {
// Put your code here
}
}