java---資料庫操作

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串連資料庫的代碼：

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class main{

            public static void main(String[]args){

                     Connnection con;//聲明Connection對象

                     String driver="com.mysql.jdbc.Driver";//驅動程式名

                     String url="jdbc:mysql://localhost:3306/sqltestdb";//url指向要訪問的資料庫名的mydata

                     String  user="root";

                     String password="123456";

                     //遍曆查詢結果集

                     try{

                            Class.forName(driver);

                            //getConnection方法串連資料庫

                            con=DriverManager.getConnection(url,user,password);

                            if(!con.isClosed())

                                    System.out.println("Succeeded  connecting to the database");

                          //建立Statement對象來執行sql語句

                           Statement statement=con.createStatement();

                           String sql="select * from emp";// 要執行的sql語句

                           ResultSet rs=statement.excuteQuery(sql);   //ResultSet類用來存放結果集

                           System.out.println("--------------");

                           System.out.println("執行結果如下：");

                           System.out.println("---------------");

                           System.out.println("姓名"+"\t"+"職稱");

                           System.out.println("--------------");

                           String job=null;

                           String id=null;

                            while(rs.next()){

                              //擷取stuname這列資料

                              job=rs.getString("job");

                              id=rs.getString("ename"); 

                              System.out.println(job+"\t"+id);

                                }

                             rs.close();

                             con.close();

                            }catch(ClassNotFoundException e){

                                 System.out.println("sorry,i can‘t find driver");

                                 e.printStackTrace();

                                 }catch(SQLException e){

                                        e.printStacktrace();

                                            }catch(Exception e){

                                             e.printStackTrace();

                                             }

                                   finally{

                                    System.out.println("資料庫成功擷取到資料");

                                          }

                 }

}

          

                                           

                                                  

java---資料庫操作