[置顶] JSP+Servlet+JavaBean传统方式实现简易留言板制作（注册、登录、留言）
学JavaEE也有一段时间了，跟着老师和教材做了不少东西，但是一直以来没时间写博客，今天就把以前写的一个简易留言板简单发一下吧。
- 开发工具
- 开发环境
开发环境为windows系统，已安装配置Java最新版开发环境。
- 主要功能与语言
所采用JSP+Servlet+JavaBean传统方式，仅限于学习使用。
- 主要代码实现
login.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>登录界面</title>
</head>
<body bgcolor="#ddd" style="font-family:Microsoft YaHei" >
<div style="text-align:center;margin-top:120px">
<h1 >请登录</h1>
<form action="loginServlet" method="post">
<table style="margin-left:40%">
<caption>用户登录</caption>
<tr>
<td>登录名：</td>
<td><input name="name" type="text" size="20"></td>
</tr>
<tr>
<td>密码:</td>
<td><input name="password" type="password" size="21"></td>
</tr>
</table>
<input type="submit" value="登录">
<input type="reset" value="重置">
</form>
<br>
<a href="register.jsp">注册</a>
</div>
</body>
</html>
register.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>注册界面</title>
</head>
<body bgcolor="#ddd" style="font-family:Microsoft YaHei" >
<div style="text-align:center;margin-top:120px">
<h1 >请注册</h1>
<form action="registerServlet" method="post">
<table style="margin-left:40%">
<caption>用户注册</caption>
<tr>
<td>ID:</td>
<td><input name="id" type="text" size="20"></td>
</tr>
<tr>
<td>登录名：</td>
<td><input name="name" type="text" size="20"></td>
</tr>
<tr>
<td>密码:</td>
<td><input name="password" type="password" size="21"></td>
</tr>
</table>
<input type="submit" value="注册">
<input type="reset" value="重置">
</form>
<br>
<a href="login.jsp">登录</a>
</div>
</body>
</html>
error.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>登录出错界面</title>
</head>
<body bgcolor="#ddd" style="font-family:Microsoft YaHei">
<div style="text-align:center;margin-top:130px">
<p>输入的用户名不存在或者密码错误</p>
<a href="login.jsp">点我返回登陆界面</a>
</div>
</body>
</html>
main.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%@page import="org.model.MessBoar" %>
<%@page import="org.dao.*" %>
<html>
<head>
<title>留言板界面</title>
</head>
<body bgcolor="#ddd" >
<div style="margin-left:35%;margin-top:100px;font-family:Microsoft YaHei">
<h1 style="margin-left:5%">这里是留言板主界面</h1>
<form action="leavemessage.jsp" method="post">
<table border="1">
<caption>所有留言信息</caption>
<tr><th>留言人姓名</th><th>留言时间</th>
<th>留言标题</th><th>留言内容</th></tr>
<%
ArrayList<MessBoar> al=new ArrayList<MessBoar>();
al= (ArrayList)session.getAttribute("al");
if(al!=null){
Iterator iter=al.iterator();
while(iter.hasNext()){
MessBoar mb=(MessBoar)iter.next();
%>
<tr><td><%= new LoginDao().getName(mb.getId()) %></td>
<td><%= mb.getTime().toString() %></td>
<td><%= mb.getTitle() %></td>
<td><%= mb.getMessage() %></td></tr>
<%
}
}
%>
</table>
</form>
<a style="margin-left:22%" href="leavemessage.jsp">留言</a>
</div>
</body>
</html>
leavemessage.jsp
<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%@page import="org.model.MessBoar" %>
<%@page import="org.dao.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>留言界面</title>
</head>
<body bgcolor="#ddd" style="font-family:Microsoft YaHei">
<div style="text-align:center;margin-top:140px">
<h1 >请留言</h1>
<form action="leaveMessageServlet" method="post">
<table style="margin-left: 37%" border="1">
<caption>填写留言信息</caption>
<tr><td>留言标题</td>
<td><input type="text" name="title"/></td></tr>
<tr><td>留言内容</td>
<td><textarea name="message" rows="5" cols="35"></textarea></td>
</tr>
</table>
<input type="submit" value="提交"/>
<input type="reset" value="重置"/>
</form>
<a href="main.jsp">返回留言板界面</a>
</div>
</body>
</html>
success.jsp
<%@ page language="java" pageEncoding="gb2312"%>
<html>
<head>
<title>成功界面 </title>
</head>
<body>
<div bgcolor="#ddd" style="margin-left:42%;margin-top:240px;font-family:Microsoft YaHei"">
留言成功，单击<a href="loginServlet">这里</a>返回主界面。
</div>
</body>
</html>
web.xml（配置）
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<servlet>
<servlet-name>loginServlet</servlet-name>
<servlet-class>org.servlet.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>loginServlet</servlet-name>
<url-pattern>/loginServlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>registerServlet</servlet-name>
<servlet-class>org.servlet.RegisterServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>registerServlet</servlet-name>
<url-pattern>/registerServlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>leaveMessageServlet</servlet-name>
<servlet-class>org.servlet.LeaveMessageServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>leaveMessageServlet</servlet-name>
<url-pattern>/leaveMessageServlet</url-pattern>
</servlet-mapping>
<display-name>messageBoard</display-name>
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
</web-app>
DBconn.java
package org.db;
import java.sql.*;
public class DBconn {
public static Connection conn; //Connection对象（链接）
//连接数据库
public static Connection getConn(){
try{
//加载注册SQLSever的JDBC驱动
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
//编写链接字符串，创建并且获取链接
conn=DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=MessageBoard","sa","19961002happy");
return conn;
}catch(Exception e){
e.printStackTrace();
return null;
}
}
public static void CloseConn(){
try{
conn.close();
}catch(Exception e){
e.printStackTrace();
}
}
}
LoginDao.java
package org.db;
import java.sql.*;
public class DBconn {
public static Connection conn; //Connection对象（链接）
//连接数据库
public static Connection getConn(){
try{
//加载注册SQLSever的JDBC驱动
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
//编写链接字符串，创建并且获取链接
conn=DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=MessageBoard","sa","19961002happy");
return conn;
}catch(Exception e){
e.printStackTrace();
return null;
}
}
public static void CloseConn(){
try{
conn.close();
}catch(Exception e){
e.printStackTrace();
}
}
}
Login.java
package org.model;
public class Login {
private Integer id;
private String name;
private String password;
private int role;
public Integer getId(){
return this.id;
}
public void setId(Integer id){
this.id=id;
}
public String getName(){
return this.name;
}
public void setName(String name){
this.name=name;
}
public String getPassword(){
return this.password;
}
public void setPassword(String password){
this.name=password;
}
public int getRole(){
return this.role;
}
public void setRole(int role){
this.role=role;
}
}
message.java
package org.model;
import java.sql.*;
public class MessBoar {
private int id;
private String name;
private Date time;
private String title;
private String message;
public int getId() {
return id;
}
public void setId(int id) {
this.id=id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name=name;
}
public Date getTime() {
return time;
}
public void setTime(Date time) {
this.time=time;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title=title;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message=message;
}
}
LeaveMessageServlet.java
package org.servlet;
import java.io.IOException;
import java.sql.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.dao.LoginDao;
import org.model.*;
public class LeaveMessageServlet extends HttpServlet{
public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
// 设置请求编码
request.setCharacterEncoding("gb2312");
// 设置响应编码
response.setContentType("gb2312");
// 获取title内容
String title=request.getParameter("title");
// 获取message内容
String message=request.getParameter("message");
// 从session中取出当前用户对象
Login leaveMessageBoard=(Login) request.getSession().getAttribute("login");
// 建立留言表对应JavaBean对象，把数据封装进去
MessBoar mb=new MessBoar();
mb.setId(leaveMessageBoard.getId());
// 参数为获取的当前时间
mb.setName(leaveMessageBoard.getName());
mb.setTime(new Date(System.currentTimeMillis()));
mb.setTitle(title);
mb.setMessage(message);
// 调DB类中的方法判断是否插入成功
if(new LoginDao().addInfo(mb)){
response.sendRedirect("success.jsp") ;
}
}
public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
doGet(request,response);
}
}
LoginServlet.java
package org.servlet;
import java.io.IOException;
import java.sql.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.dao.LoginDao;
import org.model.*;
public class LeaveMessageServlet extends HttpServlet{
public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
// 设置请求编码
request.setCharacterEncoding("gb2312");
// 设置响应编码
response.setContentType("gb2312");
// 获取title内容
String title=request.getParameter("title");
// 获取message内容
String message=request.getParameter("message");
// 从session中取出当前用户对象
Login leaveMessageBoard=(Login) request.getSession().getAttribute("login");
// 建立留言表对应JavaBean对象，把数据封装进去
MessBoar mb=new MessBoar();
mb.setId(leaveMessageBoard.getId());
// 参数为获取的当前时间
mb.setName(leaveMessageBoard.getName());
mb.setTime(new Date(System.currentTimeMillis()));
mb.setTitle(title);
mb.setMessage(message);
// 调DB类中的方法判断是否插入成功
if(new LoginDao().addInfo(mb)){
response.sendRedirect("success.jsp") ;
}
}
public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException{
doGet(request,response);
}
}
RegisterServlet.java
package org.servlet;
import java.io.IOException;
import org.dao.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class RegisterServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("gb2312");
int id=Integer.valueOf(request.getParameter("id"));
String name=request.getParameter("name");
String password=request.getParameter("password");
if(new LoginDao().insertUser(id ,name, password)){
response.sendRedirect("login.jsp");
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request,response);
}
}
- 简单介绍
- 效果图
![[置顶] JSP+Servlet+JavaBean传统方式实现简易留言板制作（注册、登录、留言）_第1张图片](http://img.e-com-net.com/image/info5/694fb25f5c824a24be9daa8ae2916bc3.jpg)
![[置顶] JSP+Servlet+JavaBean传统方式实现简易留言板制作（注册、登录、留言）_第2张图片](http://img.e-com-net.com/image/info5/b0c03b12f2174716943ef29b93b5a8cb.jpg)
![[置顶] JSP+Servlet+JavaBean传统方式实现简易留言板制作（注册、登录、留言）_第3张图片](http://img.e-com-net.com/image/info5/c8b15da8703f4ad1a58989f93d502fa2.jpg)
![[置顶] JSP+Servlet+JavaBean传统方式实现简易留言板制作（注册、登录、留言）_第4张图片](http://img.e-com-net.com/image/info5/607a4403393c4398914340807eac5c6d.jpg)
![[置顶] JSP+Servlet+JavaBean传统方式实现简易留言板制作（注册、登录、留言）_第5张图片](http://img.e-com-net.com/image/info5/03846a73e38f481eb51413bbff8cb460.jpg)
![[置顶] JSP+Servlet+JavaBean传统方式实现简易留言板制作（注册、登录、留言）_第6张图片](http://img.e-com-net.com/image/info5/b1f2d182fb484395a6b0a840928c9440.jpg)
![[置顶] JSP+Servlet+JavaBean传统方式实现简易留言板制作（注册、登录、留言）_第7张图片](http://img.e-com-net.com/image/info5/f7d561201d924018ab657b3c9eef1f65.jpg)
好好学习，天天向上~加油~~~
//没想到竟然被红黑联盟转载了，受宠若惊。对了，这个工程我也传了上来，链接在此：http://download.csdn.net/detail/qq_33171970/9514965
这个要积分的。。。。
本来想骗点积分的。。。想想还是算了，传到百度云上吧：
链接: http://pan.baidu.com/s/1c2iCPQ4 密码: 7yxk