?? jdo.java
字號:
package com.db;
import java.sql.*;
public class Jdo {
Connection conn=null;
Statement stmt=null;
public Jdo()
{
try
{
// java.sql.DriverManager.registerDriver(new org.gjt.mm.mysql.Driver());
Class.forName(Config.driver);
conn=DriverManager.getConnection(Config.url,Config.user,Config.password);
stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
}
catch (Exception e)
{
System.out.println("class not find or sqlexception");
e.printStackTrace();
}
}
public void executeUpdate(String sql)
{
try {
stmt.executeUpdate(sql);
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public ResultSet executeQuery(String sql)
{
ResultSet rs=null;
try {
rs= stmt.executeQuery(sql);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return rs;
}
public void destroy()
{
try {
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public String executeQueryString(String sql)
{
ResultSet rs=null;
try {
rs= stmt.executeQuery(sql);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
rs.next();
return rs.getString(1);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
public int executeQueryInt(String sql)
{
ResultSet rs=null;
try {
rs= stmt.executeQuery(sql);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
rs.next();
return rs.getInt(1);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return 1;
}
public int rowCount(String sql)
{
ResultSet rs=null;
try {
rs= stmt.executeQuery(sql);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
int i=0;
try {
rs.next();
i= rs.getInt(1);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return i;
}
public static void main(String args[]) throws SQLException
{
Jdo jdo=new Jdo();
jdo.executeUpdate("insert into `order`(`ordernumber`) values ( '1123')");
//jdo.executeUpdate("insert into order(ordernumber) values ( '1123')");
jdo.destroy();
System.out.println((int)Math.ceil((double)8/(double)3));
System.out.println( (int)Math.ceil((double)8)/((double)3));
//System.out.println(count);
}
}
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