Java调用MySQL存储过程

Posted 2020-08-19 shootercheng

    Java调用mysql的存储过程，需要用JDBC连接，环境eclipse

    首先查看MySQL中的数据库的存储过程，接着编写代码调用

   

mysql> show procedure status;
+------+-------------+-----------+----------------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
| Db   | Name        | Type      | Definer        | Modified            | Created             | Security_type | Comment | character_set_client | collation_connection | Database Collation |
+------+-------------+-----------+----------------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
| book | findAllBook | PROCEDURE | root@localhost | 2016-09-04 11:13:31 | 2016-09-04 11:13:31 | DEFINER       |         | gbk                  | gbk_chinese_ci       | utf8_general_ci    |
| book | pro_test    | PROCEDURE | root@localhost | 2016-11-13 08:27:17 | 2016-11-13 08:27:17 | DEFINER       |         | gbk                  | gbk_chinese_ci       | utf8_general_ci    |
| book | pro_user    | PROCEDURE | root@localhost | 2016-11-13 08:44:34 | 2016-11-13 08:44:34 | DEFINER       |         | gbk                  | gbk_chinese_ci       | utf8_general_ci    |
+------+-------------+-----------+----------------+---------------------+---------------------+---------------+---------+----------------------+----------------------+--------------------+
3 rows in set (0.01 sec)

mysql> show create procedure findAllBook;
+-------------+------------------------+---------------------------------------------------------------------------------------------------+----------------------+----------------------+--------------------+
| Procedure   | sql_mode               | Create Procedure                                                                                  | character_set_client | collation_connection | Database Collation |
+-------------+------------------------+---------------------------------------------------------------------------------------------------+----------------------+----------------------+--------------------+
| findAllBook | NO_ENGINE_SUBSTITUTION | CREATE DEFINER=`root`@`localhost` PROCEDURE `findAllBook`()
begin
    select * from tb_books;
end | gbk                  | gbk_chinese_ci       | utf8_general_ci    |
+-------------+------------------------+---------------------------------------------------------------------------------------------------+----------------------+----------------------+--------------------+
1 row in set (0.00 sec)

 

   1.工程目录结构

   2.Book.java

   

package com.scd.book;

public class Book {
    private String name;  //图书名称
    private double price;  //价格
    private int bookCount; //数量
    private String author; //作者

    public String getName()
    {
        //System.out.println(name);
        return name;
    }
    public void setName(String name)
    {
        this.name = name;
    }
    public double getPrice()
    {
        return price;
        
    }
    public void setPrice(double price)
    {
        this.price = price;
    }
    public int getBookCount()
    {
        return bookCount;
    }
    public void setBookCount(int bookCount)
    {
        this.bookCount = bookCount;
    }
    public String getAuthor()
    {
        return author;
    }
    public void setAuthor(String author)
    {
        //System.out.println(author);
        this.author = author;
    }

}

  2.FindBook.java

 

package com.scd.book;

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

public class FindBook {
    /**
     * 获取数据库连接
     * @return Connection对象
     */
    public Connection getConnection()
    {
        Connection conn = null;   //数据库连接
        try
        {
            Class.forName("com.mysql.jdbc.Driver"); //加载数据库驱动，注册到驱动管理器
            /*数据库链接地址*/
            String url = "jdbc:mysql://localhost:3306/book?useUnicode=true&characterEncoding=UTF-8";
            String username = "root";
            String password = "123456";
            /*创建Connection链接*/
            conn = DriverManager.getConnection(url, username, password); 
            
        }
        catch (ClassNotFoundException e){
            
            e.printStackTrace();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return conn;  //返回数据库连接
        
    }
    /**
     * 通过存储过程查询数据
     * @return List<Book>
     */
    public List<Book> findAll() 
    {
        List <Book> list = new ArrayList<Book>(); //实例化List对象
        Connection conn = getConnection();  //创建数据库连接
        try
        {
            //调用存储过程
            CallableStatement cs = conn.prepareCall("{call findAllBook()}");
            ResultSet rs = cs.executeQuery(); //执行查询操作，并获取结果集
            while(rs.next())
            {
                Book book = new Book(); //实例化Book对象
                book.setName(rs.getString("name"));  //对name属性赋值
                book.setPrice(rs.getDouble("price")); //对price属性赋值
                book.setBookCount(rs.getInt("bookCount")); //对bookCount属性赋值
                book.setAuthor(rs.getString("author")); //对author属性赋值
                list.add(book);
            }
            
        }catch(Exception e)
        {
            e.printStackTrace();
        }        
        return list;     //返回list
    }
    /**
     * 主函数 调用存储过程(测试使用)
     * @param args
     */
    public static void main(String[] args)
    {
        FindBook fb = new FindBook();
        //System.out.println(fb.findAll());
        for (Book book : fb.findAll())
        {
            System.out.print(book.getName() + "--" + book.getPrice() + "--");
            System.out.print(book.getBookCount() + "--" + book.getAuthor());
            System.out.println();
        }
    }
}

3.右键 Run As --> Java Application, 控制台输出

4.执行存储过程中的 sql语句

mysql> select * from tb_books;
+------------------+-------+-----------+----------+
| name             | price | bookCount | author   |
+------------------+-------+-----------+----------+
| Java丛入门到精通 | 56.78 |        13 | Mr. Sun  |
| 数据结构         |  67.3 |      8962 | Mr. Sun  |
| 编译原理         | 78.66 |      5767 | Mr. Sun  |
| 数据结构         | 67.42 |       775 | Mr.Cheng |
+------------------+-------+-----------+----------+
4 rows in set (0.00 sec)

mysql> call findAllBook();
+------------------+-------+-----------+----------+
| name | price | bookCount | author |
+------------------+-------+-----------+----------+
| Java丛入门到精通 | 56.78 | 13 | Mr. Sun |
| 数据结构 | 67.3 | 8962 | Mr. Sun |
| 编译原理 | 78.66 | 5767 | Mr. Sun |
| 数据结构 | 67.42 | 775 | Mr.Cheng |
+------------------+-------+-----------+----------+
4 rows in set (0.00 sec)