数据库开发 - JDBC单元作业

为什么80%的码农都做不了架构师？>>>   

#JDBC 单元作业

#解答：
##MySQL建立表格

CREATE TABLE `product` (
`Id`  int NOT NULL AUTO_INCREMENT ,
`ProductName`  varchar(100) NULL ,
`Inventory`  int NULL ,
PRIMARY KEY (`Id`)
)
;

##初始化表格数据

INSERT INTO `product` (`Id`, `ProductName`, `Inventory`) VALUES ('1', 'bread', '11');
INSERT INTO `product` (`Id`, `ProductName`, `Inventory`) VALUES ('2', 'milk', '8');

##读取商品ID为1的商品记录，输出商品名称和库存数量

package com.hava.jdbc;

import java.sql.*;

/**
 * Created by yanfa on 2016/9/22.
 */
public class ProductJDBC {

    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";

    static final String DB_URL = "jdbc:mysql://192.168.1.200/test";

    static final String USER = "root";

    static final String PASSWORD = "dVHJtG0T:pf*";

    public static void findFirstOne() throws ClassNotFoundException {
        Connection connection = null;

        Statement statement = null;

        ResultSet resultSet = null;


        // 1. add Driver
        Class.forName(JDBC_DRIVER);

        // 2. create db connnection
        try {
            connection = DriverManager.getConnection(DB_URL,USER,PASSWORD);

            // 3.run SQL

            statement = connection.createStatement();
            resultSet = statement.executeQuery("SELECT * FROM `product` WHERE `Id` = '1' LIMIT 0, 1000");

            // 4.get userName
            while(resultSet.next())
            {
                Integer index = resultSet.getRow();
                Integer Id = resultSet.getInt("Id");
                String ProductName = resultSet.getString("ProductName");
                Integer Inventory = resultSet.getInt("Inventory");
                System.out.println("resultSet [row]:" + index + " [product.Id]:" + Id + " [product.ProductName]:" + ProductName + " [product.Inventory]:" + Inventory);
            }
        } catch (SQLException e) {
            // Exception
            e.printStackTrace();
        } finally {
            try {

                // 5. close connection
                if(connection != null)
                    connection.close();
                if(statement != null)
                    statement.close();
                if(resultSet != null)
                    resultSet.close();

            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}

##测试类

package com.hava.jdbc;

import junit.framework.TestCase;

/**
 * Created by zhanpeng on 2016/9/22.
 */
public class ProductJDBCTest extends TestCase {
    public void testFindFirstOne() throws Exception {
        System.out.println("Class ProductJDBCTest Method testFindFirstOne");
        ProductJDBC.findFirstOne();
    }

}

##打印输出

Class ProductJDBCTest Method testFindFirstOne

resultSet [row]:1 [product.Id]:1 [product.ProductName]:bread [product.Inventory]:11

Process finished with exit code 0

转载于:https://my.oschina.net/hava/blog/750404