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用户留言java代码 java留言板功能齐全源码

IT技术String

用Java做一个类似于QQ空间留言板的功能 。。。不用数据库也能实现. 及时性的罢了；
要是数据库的话：方法一（用于有条件性的，比如只显示对方发的信息）
1user表id , use两列
2messages表id , message , message_person , use_id (外键)四列
方法二（双方都用select * form messages查询所有信息）
1messages表id , message两列
开源里有没有留言板的源代码，JAVA的绝对开源 ， 绝对明了的留言板，便于学习的源码
用JAVA写的留言板原代码
/*
* guestbookServlet.java
*
* */
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.util.Date;
/**
*
* */
public class guestbookServlet extends HttpServlet {
boolean debug=false;
String sDBDriver;
Connection conn=null;
ResultSet rs=null;
/** Initializes the servlet.
*/
public void init(ServletConfig config) throws ServletException {
super.init(config);
if(debug)
sDBDriver=new String("sun.jdbc.odbc.JdbcOdbcDriver");
else
sDBDriver=new String("org.gjt.mm.mysql.Driver");
try{
Class.forName(sDBDriver);
}
catch(java.lang.ClassNotFoundException e){
System.err.println("Driver类初始化:"+e.getMessage());
}
}
/** Destroys the servlet.
*/
public void destroy() {
}
/** Processes requests for both HTTP codeGET/code and codePOST/code methods.
* @param request servlet request
* @param response servlet response
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
response.setContentType("text/html;charset=gb2312");
java.io.PrintWriter out = response.getWriter();
boolean empty=true;
boolean noResult=true;
String sqlStr;
int currentPage=0;
int totalPage=0;
int reccount=0;
ResultSet myrs=null;
String username=request.getParameter("username");
String email=request.getParameter("email");
String ucontent=request.getParameter("ucontent");
String ipage=request.getParameter("ipage");
if(ipage==null||ipage.length()==0)
currentPage=1;
else
currentPage=Integer.parseInt(ipage);
if((username==null||username.length()==0)||(ucontent==null||ucontent.length()==0))empty=true;
else empty=false;
Date myDate=new Date();
//String intime=new String(String.valueOf(myDate.getYear()+1990)+String.valueOf(myDate.getMonth()));
String year=String.valueOf(myDate.getYear()+1900);
String month=String.valueOf(myDate.getMonth()+1);
if(month.length()==1)
month=new String("0"+month);
String days=String.valueOf(myDate.getDate());
if(days.length()==1)
days=new String("0"+days);
String hours=String.valueOf(myDate.getHours());
if(hours.length()==1)
hours=new String("0"+hours);
String minutes=String.valueOf(myDate.getMinutes());
if(minutes.length()==1)
minutes=new String("0"+minutes);
String intime=year+"-"+month+"-"+days+" "+hours+":"+minutes;
if(email==null||email.length()==0)
email=new String("");
if(!empty){
//username=convert(username);
//email=convert(email);
//ucontent=convert(ucontent);
sqlStr="insert into Mintegbook(Mname,Memail,Mcontent,Mtime,Mid) values("+username+","+email+","+ucontent+","+intime+",1)";
getDsnConn();
executeInsert(sqlStr);
}
sqlStr=new String("select Mname,Memail,Mcontent,Mtime from Mintegbook order by Mtime DESC");
getDsnConn();
reccount=getRecordCount("Mintegbook");
if(reccount==0)
noResult=true;
else
noResult=false;
if(!noResult){
int ipageSize=10;
totalPage=getTotalPage("Mintegbook",ipageSize);

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