/**
 * 獲取數(shù)據(jù)庫連接，并使用SQL語句，向數(shù)據(jù)庫中插入記錄
 */
package com.pack03;

import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

public class TestStatement {

 //***************************該方法用于獲取數(shù)據(jù)庫連接*****************************
 public static Connection getConnection() throws Exception {
  // 1.將配置文件中的連接信息獲取到Properties對(duì)象中
  InputStream is = 
    TestStatement.class.getClassLoader().getResourceAsStream("setting.properties");

  Properties setting = new Properties();
  setting.load(is);

  // 2.從Properties對(duì)象中讀取需要的連接信息
  String driverName = setting.getProperty("driver");
  String url = setting.getProperty("url");
  String user = setting.getProperty("user");
  String password = setting.getProperty("password");

  // 3.加載驅(qū)動(dòng)程序，即將數(shù)據(jù)庫廠商提供的Driver接口實(shí)現(xiàn)類加載進(jìn)內(nèi)存；
  // 該驅(qū)動(dòng)類中的靜態(tài)代碼塊包含有注冊(cè)驅(qū)動(dòng)的程序，在加載類時(shí)將被執(zhí)行
  Class.forName(driverName);

  // 4.通過DriverManager類的靜態(tài)方法getConnection獲取數(shù)據(jù)連接
  Connection conn = DriverManager.getConnection(url, user, password);
  
  return conn;
 }
 
 
 //************************該方法用于執(zhí)行SQL語句，修改數(shù)據(jù)庫內(nèi)容*************************
 public static void testStatement( String sqlStatement ) {
  
  Connection conn = null;
  Statement statement = null;
  
  try {
   //1.獲取到數(shù)據(jù)庫的連接
   conn = getConnection();
   
   //2.用Connection中的 createStatement()方法獲取 Statement 對(duì)象
   statement = conn.createStatement();
   
   //3.調(diào)用 Statement 對(duì)象的 executeUpdate()方法，執(zhí)行SQL語句并修改數(shù)據(jù)庫
   statement.executeUpdate( sqlStatement );
   
  } catch (Exception e) {
   
   e.printStackTrace();
   
  } finally {
   
   //4.關(guān)閉Statement對(duì)象
   if(statement != null) {
    try {
     statement.close();
    } catch (SQLException e) {
     e.printStackTrace();
    }
   }
   
   //5.關(guān)閉 Connection對(duì)象
   if(conn != null) {
    try {
     conn.close();
    } catch (SQLException e) {
     e.printStackTrace();
    }
   }
  }
 }
 
 public static void main(String[] args) {
  
  
  String sqlInsert = "insert into tab001 values( 3, '小明3' )"; //插入語句
  String sqlUpdate = "update tab001 set name='王凱' where id=1"; //修改語句
  String sqlDelete = "delete from tab001 where id=2"; //刪除語句
  //對(duì)于Statement對(duì)象，不能執(zhí)行select語句
  
  testStatement( sqlInsert );
  testStatement( sqlUpdate );
  testStatement( sqlDelete );
 }
}