import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
public class JDBCTools {
       public static void update1(String sql , Object ... args){
             Connection con = null;
             PreparedStatement ps = null;
             
             try {
                    con = getConnection();
                    ps = con.prepareStatement(sql);
                    for(int i = 0;i<args.length;i++){//索引的下標從1開始  和陣列不一樣
                           ps.setObject(i+1, args[i]);
                    }
                    ps.executeUpdate();
             } catch (Exception e) {
                    e.printStackTrace();
             }finally{
                    release(con, ps);
             }
       }
       public void update(String sql){//實現資料庫的更新操作 使用Statement介面
             Connection con = null;
             Statement state = null;
             
             try {
                    con = getConnection();
                    
                    state = con.createStatement();
                    
                    state.executeUpdate(sql);
             } catch (Exception e) {
                    e.printStackTrace();
             }finally{
                    release(con,state);
             }
             
       }
       public static Connection getConnection() throws Exception{//連線資料庫
             String driverClass = null;
             String url = null;
             String user = null;
             String password = null;
             
             Properties properties = new Properties();
             
             InputStream in = Review.class.getClassLoader().getResourceAsStream("jdbc.properties");
             properties.load(in);
             
             driverClass = properties.getProperty("driver");
             url = properties.getProperty("jdbcurl");
             user = properties.getProperty("user");
             password = properties.getProperty("password");
             Class.forName(driverClass);
             return DriverManager.getConnection(url, user, password);
       }
       public static void release(Connection con , Statement state){//關閉資料庫連線
             if(state != null){
                    try {
                           state.close();
                    } catch (SQLException e) {
                           e.printStackTrace();
                    }
             }
             if(con != null){
                    try {
                           con.close();
                    } catch (SQLException e) {
                           e.printStackTrace();
                    }
             }
             
       }
       public static void release(ResultSet rs , Connection con , Statement state){//關閉資料庫連線
             if(rs != null)
             {
                    try {
                           rs.close();
                    } catch (SQLException e) {
                           e.printStackTrace();
                    }
             }
             if(state != null){
                    try {
                           state.close();
                    } catch (SQLException e) {
                           e.printStackTrace();
                    }
             }
             if(con != null){
                    try {
                           con.close();
                    } catch (SQLException e) {
                           e.printStackTrace();
                    }
             }
       }
}