java sqlhelper

dbinfo.properties部分：

注意每行末尾不可以有空格

#oracle configure
UserName=scott
Password=tiger
Driver=oracle.jdbc.driver.OracleDriver
Url=jdbc:oracle:thin:@127.0.0.1:1521:ORCL
#mysql
#dbUserName=root  
#dbPassword=root  
#dbDriver=com.mysql.jdbc.Driver  
#dbUrl=jdbc:mysql://127.0.0.1:3306/test100?useUnicode=true&characterEncoding=utf8  

sqlhelper部分：

package com.dy.utils;

import java.io.FileInputStream;  
import java.io.IOException;  
import java.io.InputStream;  
import java.sql.Connection;  
import java.sql.DriverManager;  
import java.sql.ResultSet;  
import java.sql.SQLException;  
import java.sql.Statement;  
import java.util.ArrayList;
import java.util.Properties;  
import java.sql.*;  
public class SqlHelper  
{  
    //定义变量  
    private static Connection ct = null;  
    //大多数情况下用preparedstatement替代statement  
    private static PreparedStatement ps = null;  
    private static ResultSet rs = null;  
     
    //连接数据库的参数  
    private static String url = "";  
    private static String username = "";  
    private static String drivername = "";  
    private static String passwd = "";  
     
    private static CallableStatement cs = null;  
    public static CallableStatement getCs()  
    {  
        return cs;  
    }  
    private static Properties  pp = null;  
    private static InputStream fis = null;  
    //加载驱动，只需要一次，用静态代码块  
    static  
    {  
        try  
        {  
           //从dbinfo.properties  
            pp = new Properties();  
            fis=SqlHelper.class.getClassLoader().getResourceAsStream("dbinfo.properties");  
            //fis = new FileInputStream();  
            pp.load(fis);  
            url = pp.getProperty("Url");  
            drivername = pp.getProperty("Driver");  
            username = pp.getProperty("UserName");  
            passwd = pp.getProperty("Password");  
            Class.forName(drivername) ; 
        }  
        catch (Exception e)  
        {  
            e.printStackTrace();  
           
        }  
        finally  
        {  
            try  
            { fis.close();}  
            catch(IOException e) {e.printStackTrace();}  
            fis = null;//垃圾回收站上收拾  
        }  
         
    }  
    //得到连接  
    public static Connection getConnection()  
        {  
            try  
            {ct = DriverManager.getConnection(url,username,passwd);}  
            catch(Exception e) {e.printStackTrace();}  
            return ct;  
        }  
     
     
//*************callPro1存储过程函数1*************     
    public static CallableStatement callPro1(String sql,String[] parameters)  
    {  
        try{  
            ct = getConnection();  
            cs = ct.prepareCall(sql);  
            if(parameters!=null){  
                for(int i=0;i<parameters.length;i++){  
                 cs.setObject(i+1,parameters[i]);  
                }  
            }     
            cs.execute();  
        }  
        catch(Exception e) { e.printStackTrace(); throw new RuntimeException(e.getMessage());}  
        finally  
        { close(rs,cs,ct);}  
        return cs;  
    }  
     
//*******************callpro2存储过程2************************  
public static CallableStatement callPro2(String sql,String[] inparameters,  
Integer[] outparameters)  
{  
    try  
    {  
        ct = getConnection();  
        cs = ct.prepareCall(sql);  
        if(inparameters!=null)  
        {  
            for(int i=0;i<inparameters.length;i++)  
            {  
                cs.setObject(i+1,inparameters[i]);  
            }  
        }  
    //cs.registerOutparameter(2,oracle.jdbc.OracleTypes.CURSOR);  
        if(outparameters!=null)  
        {  
            for(int i=0;i<outparameters.length;i++)  
            {  
                cs.registerOutParameter(inparameters.length+1+i,outparameters[i]);  
            }  
        }  
        cs.execute();  
    }  
    catch(Exception e) {  
        e.printStackTrace(); throw new RuntimeException(e.getMessage());  
    }  
    finally  
    {  
         
    }  
    return cs;  
}  

// query update
public static ArrayList executeQuery3(String sql,String[] parms) 
{
    PreparedStatement pstmt=null;
    Connection conn=null;
    ResultSet rs=null;
    try{
        conn=getConnection();
        pstmt=conn.prepareStatement(sql);
        if(parms!=null&&!parms.equals("")){
            for(int i=0;i<parms.length;i++){
                pstmt.setString(i+1, parms[i]);
            }
        }
        rs=pstmt.executeQuery();
        ArrayList al=new ArrayList();
        ResultSetMetaData rsmd=rs.getMetaData();
        int column=rsmd.getColumnCount();
        while (rs.next()){
            Object []ob=new Object[column];
            for(int i=1;i<=column;i++){
                ob[i-1]=rs.getObject(i);
            }
            al.add(ob);
        }
        return al;
    } catch(Exception e){
        e.printStackTrace();
        throw new RuntimeException(e.getMessage());  
    }finally {
        try{
            close(rs,pstmt,conn);
        }catch(Exception e){
            e.printStackTrace();
            throw new RuntimeException(e.getMessage());
        }
    }
}
    public static ResultSet executeQuery(String sql,String[] parameters)  
    {  
        try  
        {  
            ct=getConnection();  
            ps=ct.prepareStatement(sql);  
            if(parameters!=null)  
            {  
                for(int i=0;i<parameters.length;i++)  
                {  
                    ps.setString(i+1,parameters[i]);  
                }  
            }  
            rs = ps.executeQuery();  
        }  
        catch(Exception e)  
        {  
            e.printStackTrace();  
            throw new RuntimeException(e.getMessage());  
        }  
        finally  
        {  
             
        }  
        return rs;  
    }  
     
     
    public static Connection getCt()  
    {  
        return ct;  
    }  
    public static PreparedStatement getPs()  
    {  
        return ps;  
    }  
    public static ResultSet getRs()  
    {  
        return rs;  
    }  
     
     
    public static void executeUpdate2(String[] sql,String[][] parameters)  
    {  
        try  
        {  
            ct = getConnection();  
            ct.setAutoCommit(false);  
             
            for(int i=0;i<sql.length;i++)  
            {  
                 
                if(null!=parameters[i])  
                {  
                    ps = ct.prepareStatement(sql[i]);  
                    for(int j=0;j<parameters[i].length;j++)  
                    {  
                        ps.setString(j+1,parameters[i][j]);  
                    }  
                    ps.executeUpdate();  
                }  
                 
            }  
             
             
            ct.commit();  
             
             
        }catch (Exception e)  
        {  
            e.printStackTrace();  
           try  
            {  
                ct.rollback();  
            }  
            catch (SQLException e1)  
            {  
                e1.printStackTrace();  
            }  
            throw  new RuntimeException(e.getMessage());  
        }finally  
        {  
            close(rs,ps,ct);  
        }  
         
    }  
     
    //先写一个update、delete、insert  
    //sql格式：update 表名 set 字段名 =？where 字段=？  
    //parameter神应该是（”abc“,23）  
    public static void executeUpdate(String sql,String[] parameters)  
    {  
        try  
        {  
            ct=getConnection();  
            ps = ct.prepareStatement(sql);  
            if(parameters!=null)  
            {  
                for(int i=0;i<parameters.length;i++)  
                {  
                    ps.setString(i+1,parameters[i]);  
                }  
                             
            }  
            ps.executeUpdate();  
        }  
        catch(Exception e)  
        {  
            e.printStackTrace();//开发阶段  
            //抛出异常  
            //可以处理，也可以不处理  
            throw new RuntimeException(e.getMessage());  
        }  
        finally  
        {  
            close(rs,ps,ct);  
        }  
    }  
     
    public static void close(ResultSet rs,Statement ps,Connection ct)  
    {  
        //关闭资源(先开后关)  
        if(rs!=null)  
        {  
            try  
            {  
                rs.close();  
            }  
            catch(SQLException e)  
            {  
                e.printStackTrace();  
            }  
            rs=null;  
        }  
        if(ps!=null)  
        {  
            try  
            {  
                ps.close();  
            }  
            catch(SQLException e)  
            {  
                e.printStackTrace();  
            }  
            ps=null;  
       }  
        if(null!=ct)  
        {  
            try  
            {  
               ct.close();  
            }  
            catch(SQLException e)  
            {  
                e.printStackTrace();  
            }  
            ct=null;  
        }  
    }  
}