mysql 5.5 Java调用存储过程

# 创建并选择数据库
 create database mydata;
use mydata

# 显示数据库
show databases;
# 显示表
show tables；
# 查看表
 desc 表的名字;

# 客户表
 create table customers
(
 cust_id int primary key, #主键
 cust_name varchar(20),
 cust_emil varchar(50)
);

# 订单表
 create table orders
(
 orders_num int primary key,
orders_date datetime,
 cust_id int, #客户id 外键
 foreign key (cust_id) references customers(cust_id)
);

 insert into prod values (1, 'm', 'apq', '20', '1998-02-28');
 commit;

 select * from prod;

# 删除表
 drop table orders;

# 删除表数据
 delete from orders where orders_num=100; #删除一行
 delete from orders; #删除表里的所有数据

# 自动递增字段
 create table article
(
 id int primary key auto_increment,
 title varchar(10)
);

# 自动递增字段表里插入数据
 insert into article (title) values('a');
 insert into article (title) values('b');
 +----+-------+
| id | title |
 +----+-------+
|  1 | a     |
|  2 | b     |
 +----+-------+

 select * from prod limit 0,2;
 select * from prod order by prod_id desc limit 3,2;

# 日期格式化
 select date_format(now(), '%y-%m-%d %h:%i:%s');

可以显示数据库的编码
 show create table table_name;

在写SQL语句之前，请加上这一句，以保证前台和后台的编码一致
 set names gbk;
MySql安装目录下，请找到my.ini文件，在[mysql]下面把编码改成gbk, 在[mysqld]下面
 编码改成utf8 这样以后就不用写set names gbk了!!之后重启MYSql
[mysql]
# 客户端的编码
 default-character-set=gbk
[mysqld]
# 服务器端的编码
 default-character-set=utf8

# 创建并选择数据库
create database mydata;
use mydata

# 显示数据库
show databases;
# 显示表
show tables；
# 查看表
desc 表的名字;

# 客户表
create table customers
(
cust_id int primary key, #主键
cust_name varchar(20),
cust_emil varchar(50)
);

# 订单表
create table orders
(
orders_num int primary key,
orders_date datetime,
cust_id int, #客户id 外键
foreign key (cust_id) references customers(cust_id)
);

insert into prod values (1, 'm', 'apq', '20', '1998-02-28');
commit;

select * from prod;

# 删除表
drop table orders;

# 删除表数据
delete from orders where orders_num=100; #删除一行
delete from orders; #删除表里的所有数据

# 自动递增字段
create table article
(
id int primary key auto_increment,
title varchar(10)
);

# 自动递增字段表里插入数据
insert into article (title) values('a');
insert into article (title) values('b');
+----+-------+
| id | title |
+----+-------+
|  1 | a     |
|  2 | b     |
+----+-------+

select * from prod limit 0,2;
select * from prod order by prod_id desc limit 3,2;

# 日期格式化
select date_format(now(), '%y-%m-%d %h:%i:%s');

可以显示数据库的编码
show create table table_name;

在写SQL语句之前，请加上这一句，以保证前台和后台的编码一致
set names gbk;
MySql安装目录下，请找到my.ini文件，在[mysql]下面把编码改成gbk, 在[mysqld]下面
编码改成utf8 这样以后就不用写set names gbk了!!之后重启MYSql
[mysql]
# 客户端的编码
default-character-set=gbk
[mysqld]
# 服务器端的编码
default-character-set=utf8

# 创建存储过程(不带参数的)
delimiter //
 create procedure user_avg()
 begin
     select avg(money) as avg_money from user;
 end //
delimiter ;

# 调用存储过程
call user_avg();

# 删除存储过程
 drop procedure if exists user_avg;

 -------------------------------------
 # 创建存储过程(带参数的), out是输出值
delimiter //
 create procedure proce(
     out low decimal(8, 2),
     out high decimal(8, 2),
     out average decimal(8, 2)
)

 begin
     select min(money) from user into low;
     select max(money) from user into high;
     select avg(money) from user into average;
 end //
delimiter ;

# 调用存储过程
call proce(@low, @high, @average);

# 检索
 select @low;
 select @high;
 select @average;
 select @low, @high, @average;

 -------------------------------------
 # 创建存储过程(带参数的), in是输入值
 create table products
(
     id int primary key auto_increment,
     name varchar(30),
     price float,
     quantity int
);

 insert into products(name, price, quantity) values('umbrella', 20.0, 5);
 insert into products(name, price, quantity) values('knife', 200.0, 10);
 insert into products(name, price, quantity) values('trousers', 300.0, 20);

delimiter //
 create procedure ordertotal(
     in number int,
     out total decimal(8, 2)
)
 begin
     select sum(price * quantity) from products where id = number into total;
 end //
delimiter ;

 call ordertotal(1, @sum);
 select @sum;

 -------------------------------------
# 显示所有存储过程
 show procedure status;
# 删除存储过程
 drop procedure if exists ordertotal;
 -------------------------------------

 -------------------------------------
 # \. D:\\SQL\\procedure.sql
 -------------------------------------

 public class Procedure {

     public static void main(String[] args) throws Exception {
         orderTotal("umbrella", 1); //umbrella: 100.0
         orderTotal("knife", 2); //knife: 2000.0
         orderTotal("trousers", 3); //trousers: 6000.0
    }

     static void orderTotal(String name, int id) throws Exception {
         Connection conn = null;
         CallableStatement cs = null;
         ResultSet rs = null;
        try {
            conn = JdbcUtils.getConnection();
            //创建语句
             String sql = "{ call ordertotal(?,?) }";
            cs = conn.prepareCall(sql);
            //注册输出参数
             cs.registerOutParameter(2, Types.DECIMAL);
            cs.setInt(1, id);
            cs.executeUpdate();

            //拿出输出参数
             float total = cs.getFloat(2);
             System.out.println(name + ": " + total);
        } finally {
             JdbcUtils.free(rs, cs, conn);
        }
    }

}