A practical JavaBean.

Import java.sql.*;
Import java.util.*;
Import java.text.*;
Import java.io.*;
public class Jdbc_sql
{
String conn_str= "jdbc:mysql://localhost/heaven_news";//---------Database
String username= "root";//---------------Database user name
String password= "";//-------------Database Password
Private Connection Conn=null;
Private Statement Stmt=null;
ResultSet Rs=null;
----------------------Database Links----------------
Public Jdbc_sql ()
{
try{
Class.forName ("Org.gjt.mm.mysql.Driver");
}
catch (Java.lang.ClassNotFoundException e)
{
System.err.println ("Dbclass ():" +e.getmessage ());
}
try{
Conn=drivermanager.getconnection (Conn_str,username,password);
}
catch (SQLException ex) {
System.err.println ("Dbclass ():" +ex.getmessage ());
}
}
---------------------database Query-----------------
Public ResultSet query (String SQL)
{
try{
Stmt=conn.createstatement ();
Rs=stmt.executequery (SQL);
catch (SQLException ex) {
SYSTEM.ERR.PRINTLN ("Query ():" +ex.getmessage ());
}
Return RS;
}
-----------Database Modification---------
public void update (String sql)
{
try{
Stmt=conn.createstatement ();
Stmt.executeupdate (SQL);
catch (SQLException ex) {
System.err.println ("Update ():" +ex.getmessage ());
}
}
----------Close Data Source--
public void closestmt ()
{
Try{stmt.close ();
}
catch (SQLException ex) {
System.err.println ("closestmt ():" +ex.getmessage ());
}
}
----------Close Link---------
public void Closeconn ()
{Try{conn.close ();}
catch (SQLException ex) {System.err.println ("Closeconn ()" +ex.getmessage ());}
}
---------------------Convert Chinese
public string Tochinese (string s) {
if (s==null)
return null;
try{
String Convert=new string (s.getbytes ("gb2312"), "iso8859-1");
return convert;
}catch (Exception e) {}
return null;
}
--------------------Paging
Public String page1 (int num,int line,int page_line,int start,int page,string search,string filename) {
int pagetotal=line*page_line;//The total number of bars to display
int pagestart;//
int pagenum;//
int total= (num-start+line-1)/line;//total number of pages obtained
int total_start= (NUM+PAGETOTAL-1)/pagetotal;//get total offset
String returnstr= "";
if (start!=0)
{
int old_start=start-pagetotal;
returnstr+= "<a href=" +filename+ "page=0&start=" +old_start+search+ "><<</a>";
}
pagestart=start/pagetotal*page_line;//Get Current Page
for (int i=0;i<total&&i<page_line;i++)
{
pagenum=pagestart+i+1;
returnstr+= "<a href= +filename+" page= "+i+" &start= "+start+search+" > "+pagenum+" </a>;
}
if (total_start!= (start/pagetotal+1) &&num!=0)
{
int new_start=start+pagetotal;
returnstr+= "<a href=" +filename+ "page=0&start=" +new_start+search+ ">>></a>";
}
return returnstr;
}
-------------------------------Get Time
Public String GetPath () {
String datestring= "123";
try{
Java.text.SimpleDateFormat formatter=new Java.text.SimpleDateFormat ("yyyy-mm");
Java.util.Date currenttime_1=new java.util.Date ();
Datestring=formatter.format (currenttime_1);
}catch (Exception e) {
}
return datestring;
}
-------------------------------Get Time
Public String Strnowtime () {
String datestring= "123";
try{
Java.text.SimpleDateFormat formatter=new Java.text.SimpleDateFormat ("Yyyy-mm-dd hh:mm:ss");
Java.util.Date currenttime_1=new java.util.Date ();
Datestring=formatter.format (currenttime_1);
}catch (Exception e) {
}
return datestring;
}
--------------------------Remove HTML---------------------------
public string HTMLEncode (string Str) {
Str=ebbreplace (Str, "<", "<");
Str=ebbreplace (STR, ">", ">");
Str=ebbreplace (Str, "\ n", "<BR>");
return Str;
}
--------------------------substitution Variable---------------------------
public string Ebbreplace (string str,string oldstr,string newstr) {
String returnstr= "";
int i,j,t,m,n;
n=0;
J=oldstr.length ();
if (Str.indexof (OLDSTR) >-1)
{
while (Str.indexof (oldstr,n) >-1)
{
I=str.length ();
if (Str.indexof (OLDSTR) ==0)
Str=newstr+str.substring (J,i);
Else
{
T=str.indexof (OLDSTR);
M= (T+J);
Str=str.substring (0,t) +newstr+str.substring (m,i);
N=t+newstr.length ()-j+1;
}
}
}
RETURNSTR=STR;
return returnstr;
}
----------------------------UBB Replace--------------------------
public string Lcreplace (string str,string bstr,string estr,string restr) {
String returnstr= "", str1= "", str2= "";
int i,j,n;
n=0;
if ((Str.indexof (BSTR) >-1) && ((Str.indexof (ESTR) >-1))
{
while (Str.indexof (bstr,n) >-1)
{
I=str.indexof (BSTR);
J=str.indexof (ESTR);
Str1=str.substring ((I+bstr.length ()), j);
Str2=ebbreplace (Restr, "$lichao $", Str1);
STR1=BSTR+STR1+ESTR;
Str=ebbreplace (STR,STR1,STR2);
N=i+str2.length ()-str1.length ();
}
}
RETURNSTR=STR;
return returnstr;
}
}