作用：创建的Statement对象执行SQL语句

(1)对象有Connection对象调用createStatement()方法创建

(2)有Statement对象调用executeUpdate()方法执行SQL语句

(3)调用的SQL语句可以是insert delete update但不可以是select

import com.mysql.jdbc.Statement;
import java.sql.Connection;
import java.sql.Driver;
import java.sql.ResultSet;
import java.util.Properties;

/**
 * Created by I am master on 2016/9/29.
 */
public class finallyjdbc {
    public static void main(String[] args) throws Exception{
            Connection connection=null;
            Statement  statement=null;
            //防止抛出的异常导致文件关闭失败
            try {
                Driver driver = new com.mysql.jdbc.Driver();
                String url = "jdbc:mysql://localhost:3306/student";
                Properties properties = new Properties();
                properties.put("user", "root");
                properties.put("password", "root");
                connection = driver.connect(url, properties);
                statement = (Statement) connection.createStatement();
                String query = "insert into  studentInfo value('5','小五','17','计算机科学')";
                statement.executeUpdate(query);
                System.out.println("加入成功");
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                try {
                    statement.close();
                }catch (Exception e){
                    e.printStackTrace();
                }finally {
                    connection.close();

                }

            }
    }
}