jdbc 连接Oracle informix Mysql

package com.basicSql;



import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;





/**

 * jdbc 链接Database执行 executeQuery()

 * 

 * @author xrhou

 * 

 */

public class TestJdbc {



    public static void main(String[] args) {

         dbconnMysql();

        //dbconnInformix();

    }



    

    /**

     * 链接Informix 数据库

     */

    public static void dbconnInformix(){

        try {

            // 1 注册驱动，加载驱动，使用反射

            Class.forName("com.informix.jdbc.IfxDriver").newInstance();

            // 2 编写数据库连接字符串

            String url="jdbc:informix-sqli://192.168.2.166:9088/bhrs:informixserver=online;NEWLOACLE=en_us,zh_cn,zh_tw;NEWCODESET=GB2312-80,8859-1,819,Big5 dbvisual";

            String user="informix";

            String password="informix";

            Connection conn=DriverManager.getConnection(url, user, password);

            //3 设置连接状态

            Statement stmt=conn.createStatement();

            //4 执行查询语句

            String sql="select * from dgwbw ;";

            ResultSet rs=stmt.executeQuery(sql);

            while(rs.next()){

                String deptid=rs.getString("entryid");

                String hm=rs.getString("hm");

                System.out.println(deptid+","+hm);

            }

            

            //5 关闭资源连接

            rs.close();

            stmt.close();

            conn.close();

        } catch (ClassNotFoundException e) {

            e.printStackTrace();

        } catch (SQLException e) {

            e.printStackTrace();

        } catch (InstantiationException e) {

            e.printStackTrace();

        } catch (IllegalAccessException e) {

            e.printStackTrace();

        }

    }

　　　　/**

　　　* 链接Mysql数据库

     */

    public static void dbconnMysql() {

        Connection conn =null;

        Statement stmt=null;

        ResultSet rs=null;

        

        try {

            // 1 注册驱动，加载驱动，使用反射

            Class.forName("com.mysql.jdbc.Driver");

            // new com.mysql.jdbc.Driver(); //相当与使用new 关键字 创建的一个实例

            String url = "jdbc:mysql://127.0.0.1:3306/test";

            String dbuser = "root";

            String dbpwd = "root";

            conn = DriverManager.getConnection(url, dbuser, dbpwd);

            stmt = conn.createStatement();



            String sql = "select id,name from person";

            rs = stmt.executeQuery(sql);

            {

                while (rs.next()) {

                    String id = rs.getString("id");

                    String name = rs.getString("name");

                    System.out.println(id + "," + name);

                }

            }

        } catch (ClassNotFoundException ex) {

            ex.printStackTrace();

        } catch (SQLException ex2) {

            ex2.printStackTrace();

        }finally{

            //5 关闭资源连接

            try {

                rs.close();

            } catch (SQLException e) {

                e.printStackTrace();

            }

            try {

                stmt.close();

            } catch (SQLException e) {

                e.printStackTrace();

            }

            try {

                conn.close();

            } catch (SQLException e) {

                e.printStackTrace();

            }

        }

    }

 

/**

     * 链接Oracle数据库

     */

    public static void dbconnOracle() {

        try {

            // 1 注册驱动，加载驱动，使用反射

            Class.forName("oracle.jdbc.driver.OracleDriver");

            // new com.mysql.jdbc.Driver(); //相当与使用new 关键字 创建的一个实例

            String url = "jdbc:oracle:thin:@127.0.0.1:1521:mydatabase";

            String dbuser = "root";

            String dbpwd = "root";

            Connection conn = DriverManager.getConnection(url, dbuser, dbpwd);

            Statement stmt = conn.createStatement();



            String sql = "select id,name from person";

            ResultSet rs = stmt.executeQuery(sql);

            {

                while (rs.next()) {

                    String id = rs.getString("id");

                    String name = rs.getString("name");

                    System.out.println(id + "," + name);

                }

            }

            // 5 关闭资源

            rs.close();

            stmt.close();

            conn.close();



        } catch (ClassNotFoundException ex) {

            ex.printStackTrace();

        } catch (SQLException ex2) {

            ex2.printStackTrace();

        }

    }



}