--- 第一步 实体类
package com.student.DAO.util;
public class User {
private String name;
private String password;
private String email;
public User(String name,String password,String email) {
super();
this.name = name;
this.password = password;
this.email = email;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
--第二部 添加数据的java文件
package com.student.Bean.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class Regis {
public Connection conn = null;
public Statement stm = null;
public ResultSet rs = null;
public String check;
public void getConn() {
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
conn = DriverManager.getConnection(
"jdbc:sqlserver://localhost:1433;database=demodb", "sa",
"svse");
// 测试数据库是否连接成功
if(conn!=null){
System.out.println("ok!");
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
public boolean register(String name, String pwd, String email) {
boolean bol = false;
this.getConn();
String sql = "insert into t_user values('"+name+"','"+pwd+"','"+email+"')";
String sqlSelect="select name from t_user where name='"+name+"'";
try {
stm=conn.createStatement();
rs=stm.executeQuery(sqlSelect);
//如果rs有值代表此账号已经存在 则现在需要无法注册
if(rs.next()){
check="亲，此用户名已经注册过了哦，亲你要换一个哦！";
}else{
if(name!=""){
if(pwd!=""){
if(email!=""){
//邮箱不允许重复注册
String sqlSelectEmail="select email from t_user where email='"+email+"'";
stm=conn.createStatement();
rs=stm.executeQuery(sqlSelectEmail);
if(rs.next()){
check="亲，此邮箱账号已经被注册过了哦，亲你再换一个邮箱吧！";
}else{
if(email.contains("@") && (email.endsWith(".cn") || email.endsWith(".com") )){
//PreparedStatement pstm=null;
stm= conn.createStatement();//创建语句对象
stm.execute(sql);
//pstm=conn.prepareStatement(sql);
//pstm.execute();
bol = true;
}else{
check="亲，请填写正确的邮箱格式！";
}
}
}else{
check="亲，请填写邮箱噢！";
}
}else{
check="亲，请填写密码哦！";
}
}else{
check="亲，请填写用户名哦！";
}
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return bol;
}
// public static void main(String[] args){
// Regis r=new Regis();
// r.getConn();
// }
}
---- 查看的java文件
package com.student.Bean.util;
import java.util.ArrayList;
import java.util.List;
import com.student.DAO.util.User;
public class Select {
public List selectMessage(){
Regis re=new Regis();
re.getConn();
List luser=new ArrayList();
String sql="select * from t_user";
try {
re.stm=re.conn.createStatement();
re.rs=re.stm.executeQuery(sql);
while(re.rs.next()){
String name=re.rs.getString(1);
String password=re.rs.getString(2);
String email=re.rs.getString(3);
User u=new User(name,password,email);
luser.add(u);
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return luser;
}
}
--- servlet 文件
--- 注册
package com.student.web.util;
import java.io.IOException;
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 com.student.Bean.util.Regis;
public class RegisServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=gbk");
String name = request.getParameter("userName");
String pwd = request.getParameter("userPwd");
String email = request.getParameter("userEmail");
Regis re = new Regis();
name=new String(name.getBytes("ISO-8859-1"),"gbk");
if (re.register(name,pwd,email)==true) {
HttpSession sess = request.getSession();
sess.setAttribute("regisName", name);
request.getRequestDispatcher("success.jsp").forward(request,
response);
} else {
//out.println("sorry!未能成功添加！");
HttpSession sess = request.getSession();
sess.setAttribute("check", re.check);
request.getRequestDispatcher("error.jsp").forward(request,
response);
}
}
}
---- 查看
package com.student.web.util;
import java.io.IOException;
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 com.student.Bean.util.Select;
import com.student.DAO.util.User;
public class SelectServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
response.setContentType("text/html;charset=gbk");
Select ss=new Select();
List array=ss.selectMessage();
HttpSession sess=request.getSession();
sess.setAttribute("selectAll",array);
request.getRequestDispatcher("select.jsp").forward(request,response);
}
}
---- web界面
<servlet>
<servlet-name>insert</servlet-name>
<servlet-class>com.student.web.util.RegisServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>insert</servlet-name>
<url-pattern>/insertAdd</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>message</servlet-name>
<servlet-class>com.student.web.util.SelectServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>message</servlet-name>
<url-pattern>/selectAllMessage</url-pattern>
</servlet-mapping>
---- index 界面
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ page errorPage="error.jsp" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="insertAdd" method="post">
请输入用户名：<input type="text" name="userName" />
<br>
请输入密码：<input type="password" name="userPwd" />
<br>
请输入注册邮箱：
<input type="text" name="userEmail" />
<br>
<input type="submit" name="submitUser" value="确定" />
</form>
</body>
</html>
登录失败
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ page isErrorPage="true" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'error.jsp' starting page</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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
sorry,<%=session.getAttribute("check") %>
</body>
</html>
登陆成功
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
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>My JSP 'success.jsp' starting page</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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="selectAllMessage" method="post">
欢迎你：<%=session.getAttribute("regisName") %>,恭喜你，注册成功！
<input type="submit" name="submitMessage" value="查看所有注册成员信息" />
</form>
</body>
</html>
-- 查看所有信息
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@ page import="com.student.DAO.util.User" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'select.jsp' starting page</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">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<table>
<tr>
<td>用户名</td>
<td>密码</td>
<td>邮箱</td>
</tr>
<%
List<User> list=(ArrayList)session.getAttribute("selectAll");
for(int i=0;i<list.size();i++){
User us=list.get(i);
%>
<tr>
<td><%=us.getName() %></td>
<td><%=us.getPassword() %></td>
<td><%=us.getEmail() %></td>
</tr>
<%
}
%>
</table>
</body>
</html>
if exists (select * from sys.objects where name='demodb')
drop database demodb
go
create database demodb
go
use demodb
go
create table t_user
(
name nvarchar(20) ,
[password] nvarchar(20),
email nvarchar(30)
)
go
select * from t_user
