jdbc.properties配置连接Sql

package com.jdbc.java;

import java.sql.Statement;
import java.io.IOException;
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.util.Properties;

public class JdbcTools {
public static void update(String sql,Object...args){
        PreparedStatement preparedStatement = null;
        Connection conn = null;
        ResultSet rs = null;
        try {
conn = JdbcTools.getConnection();
preparedStatement = conn.prepareStatement(sql);
for(int i=0;i<args.length;i++){
preparedStatement.setObject(i+1, args[i]);
}
preparedStatement.executeUpdate();
//statement.executeUpdate(sql);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block