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这人方法很简单，是jsp 调用sql server数据源的，并对查询及插入做了些处理，本方法适合于初学者

/*
* Created on 2002-8-30
* CopyRight by http://www.designac.org
*/
package org.DesignAC.database;

import java.sql.*;
import java.util.*;
import com.microsoft.jdbcx.sqlserver.SQLServerDataSource;
/**
* @author Biggie
*
* Class Function:数据库连接bean,取sql server JDBC数据源,这个数据源也可以用
* Tomcat,WebLogic,resin等提供
* 支持各种容器及平台
*  @version 1.0A
* */
public class DBConnect {
file://You Host IP
private String strHostAddress="127.0.0.1";
file://Host Port
private int intHostPort=1433;
file://UserName
private String strUserName="sa";
file://PassWord
private String strPassWord="";
file://DataBase Name
private String strDataName="dac";
file://Max Connection
private int intMaxConnection=10;
private Connection con=null;
private Statement stmt=null;
private ResultSet rs=null;
file://JDBC source
private SQLServerDataSource source=null;
ArrayList ArrayRs=new ArrayList();
/**
  * @param 构造函数注册JDBC驱动程序
  * */
public DBConnect(){
  try{
   if(source==null){
    source=new SQLServerDataSource();
    source.setDatabaseName(strDataName);
    source.setServerName(strHostAddress);
    source.setPortNumber(intHostPort);
    source.setUser(strUserName);
    source.setPassword(strPassWord);
    file://source.setHostProcess(intMaxConnection);

   }
  }catch(Exception e){
   System.out.println("open database error:"+e.getMessage());
  }
}
/**
  * @param executeQuery查询数据库方法
  * @param 每条ArrayList记录存为String[] 数组
  * @return ArrayList
  * @exception SQLException
  */
public ArrayList executeQuery(String strSql) throws SQLException {
  rs=null;
  try{
   con=source.getConnection();
   stmt=con.createStatement();
   rs=stmt.executeQuery(strSql);

   ResultSetMetaData rsmd=rs.getMetaData();
   int numberOfColumns = rsmd.getColumnCount();

   file://判断是否为空
   if(!ArrayRs.isEmpty()){
    ArrayRs.clear();
   }
   /*
    * 将每条记录写入数组
    * 将数组放在ArrayList里
    */
    while(rs.next()){
     String[] strArrayTemp=new String[numberOfColumns];
     for(int i=0;ibr>       if(rs.getObject(i+1)==null){
       strArrayTemp[i]= "";
      }else{
       strArrayTemp[i]=rs.getObject(i+1).toString();
      }
     }
     ArrayRs.add(strArrayTemp);
    }
    return (ArrayList)ArrayRs.clone();
  }catch(Exception e){
   System.out.println("query error:" + e.getMessage());
  }finally{
   if (stmt != null) {
    stmt.close();
   }
   if (con != null) {
    con.close();
   }
  }
  return ArrayRs;
}
/**
  * @param executeInsert插入数据方法
  * @return 插入条数是否成功(boolean)
  */
public boolean executeInsert(String strSql) throws SQLException{
  rs=null;
  try{
   con=source.getConnection();
   stmt=con.createStatement();

   con.setAutoCommit(true);
   int i=stmt.executeUpdate(strSql);

   if(i==1){
    return (true);
   }
  }catch(Exception e){
   System.out.println("Insert error:"+e.getMessage());
  }finally{
   if (stmt != null) {
    stmt.close();
   }
   if (con != null) {
    con.close();
   }
  }
  return (false);
}
/**
  * @param executeUpdate修改数据方法
  * @return 修改数据数(int)
  */
public int executeUpdate(String strSql) throws SQLException{
  rs=null;
  int j=0;
  try{
   con=source.getConnection();
   stmt=con.createStatement();
   con.setAutoCommit(false);

   j=stmt.executeUpdate(strSql);
   if(j>0){
    con.commit();
   }else{
    con.rollback();
   }
  }catch(Exception e){
   System.out.println("update error:"+e.getMessage());
  }finally{
   if (stmt != null) {
    stmt.close();
   }
   if (con != null) {
    con.close();
   }
  }
  return j;
}
/**
  * @param executeDelete删除数据方法
  * @return 删除数据数(int)
  */
public int executeDelete(String strSql) throws SQLException{
  rs=null;
  int j=0;
  try{
   con=source.getConnection();
   stmt=con.createStatement();

   con.setAutoCommit(false);
   j=stmt.executeUpdate(strSql);

   if(j>0){
    con.commit();
   }else{
    con.rollback();
   }
  }catch(Exception e){
   System.out.println("Delete error:"+e.getMessage());
  }finally{
   if (stmt != null) {
    stmt.close();
   }
   if (con != null) {
    con.close();
   }
  }
  return j;
}
}

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