存储过程

JAVA中对存储过程的调用方法(引)

一:Java如何实现对存储过程的调用:

A:不带输出参数的

---------------不带输出参数的----------------------------------

create procedure getsum

@n int =0<--此处为参数-->

as

declare @sum int<--定义变量-->

declare @i int

set @sum=0

set @i=0

while @i<=@n begin

set @sum=@sum+@i

set @i=@i+1

end

print 'the sum is '+ltrim(rtrim(str(@sum)))

--------------在SQL中执行:--------------------

exec getsum 100

------------在JAVA中调用:---------------------

JAVA可以调用 但是在JAVA程序却不能去显示该存储过程的结果 因为上面的存储

过程的参数类型int 传递方式是in(按值)方式

import java.sql.*;

public class ProcedureTest

{

public static void main(String args[]) throws Exception

{

//加载驱动

DriverManager.registerDriver(new sun.jdbc.odbc.JdbcOdbcDriver());

//获得连接

Connection conn=DriverManager.getConnection("jdbc:odbc:mydata","sa","");

//创建存储过程的对象

CallableStatement c=conn.prepareCall("{call getsum(?)}");

//给存储过程的参数设置值

c.setInt(1,100); //将第一个参数的值设置成100

//执行存储过程

c.execute();

conn.close();

}

}

B:带输出参数的

1:返回int

-------------------------带输出参数的----------------

alter procedure getsum

@n int =0,

@result int output

as

declare @sum int

declare @i int

set @sum=0

set @i=0

while @i<=@n begin

set @sum=@sum+@i

set @i=@i+1

end

set @result=@sum

-------------------在查询分析器中执行------------

declare @myResult int

exec getsum 100,@myResult output

print @myResult

------------在JAVA中调用---------------------

import java.sql.*;

public class ProcedureTest

{

public static void main(String args[]) throws Exception

{

//加载驱动

DriverManager.registerDriver(new sun.jdbc.odbc.JdbcOdbcDriver());

//获得连接

Connection conn=DriverManager.getConnection("jdbc:odbc:mydata","sa","");

//创建存储过程的对象

CallableStatement c=conn.prepareCall("{call getsum(?,?)}");

//给存储过程的第一个参数设置值

c.setInt(1,100);

//注册存储过程的第二个参数

c.registerOutParameter(2,java.sql.Types.INTEGER);

//执行存储过程

c.execute();

//得到存储过程的输出参数值

System.out.println (c.getInt(2));

conn.close();

}

}

2:返回varchar

----------------存储过程带游标----------------

---在存储过程中带游标 使用游标不停的遍历orderid

create procedure CursorIntoProcedure

@pname varchar(8000) output

as

--定义游标

declare cur cursor for select orderid from orders

--定义一个变量来接收游标的值

declare @v va
4000
rchar(5)

--打开游标

open cur

set @pname=''--给@pname初值

--提取游标的值

fetch next from cur into @v

while @@fetch_status=0

begin

set @pname=@pname+';'+@v

fetch next from cur into @v

end

print @pname

--关闭游标

close cur

--销毁游标

deallocate cur

------------执行存储过程--------------

exec CursorIntoProcedure ''

--------------JAVA调用------------------

import java.sql.*;

public class ProcedureTest

{

public static void main(String args[]) throws Exception

{

//加载驱动

DriverManager.registerDriver(new sun.jdbc.odbc.JdbcOdbcDriver());

//获得连接

Connection conn=DriverManager.getConnection("jdbc:odbc:mydata","sa","");

CallableStatement c=conn.prepareCall("{call CursorIntoProcedure(?)}");

c.registerOutParameter(1,java.sql.Types.VARCHAR);

c.execute();

System.out.println (c.getString(1));

conn.close();

}

}

C:删除数据的存储过程

------------------存储过程--------------------------

drop table 学生基本信息表

create table 学生基本信息表

(

StuID int primary key,

StuName varchar(10),

StuAddress varchar(20)

)

insert into 学生基本信息表 values(1,'三毛','wuhan')

insert into 学生基本信息表 values(2,'三毛','wuhan')

create table 学生成绩表

(

StuID int,

Chinese int,

PyhSics int

foreign key(StuID) references 学生基本信息表(StuID)

on delete cascade

on update cascade

)

insert into 学生成绩表 values(1,99,100)

insert into 学生成绩表 values(2,99,100)

--创建存储过程

create procedure delePro

@StuID int

as

delete from 学生基本信息表 where StuID=@StuID

--创建完毕

exec delePro 1 --执行存储过程

--创建存储过程

create procedure selePro

as

select * from 学生基本信息表

--创建完毕

exec selePro --执行存储过程

------------------在JAVA中调用----------------

import java.sql.*;

public class ProcedureTest

{

public static void main(String args[]) throws Exception

{

//加载驱动

DriverManager.registerDriver(new sun.jdbc.odbc.JdbcOdbcDriver());

//获得连接

Connection conn=DriverManager.getConnection("jdbc:odbc:mydata","sa","");

//创建存储过程的对象

CallableStatement c=conn.prepareCall("{call delePro(?)}");

c.setInt(1,1);

c.execute();

c=conn.prepareCall("{call selePro}");

ResultSet rs=c.executeQuery();

while(rs.next())

{

String Stu=rs.getString("StuID");

String name=rs.getString("StuName");

String add=rs.getString("StuAddress");

System.out.println ("学号:"+" "+"姓名:"+" "+"地址");

System.out.println (Stu+" "+name+" "+add);

}

c.close();

}

}

D:修改数据的存储过程

---------------------创建存储过程---------------------

create procedure ModPro

@StuID int,

@StuName varchar(10)

as

update 学生基本信息表 set StuName=@StuName where StuID=@StuID

-------------执行存储过程-------------------------

exec ModPro 2,'四毛'

---------------JAVA调用存储过程--------------------

import java.sql.*;

public class ProcedureTest

{

public static void main(String args[]) throws Exception

{

//加载驱动

DriverManager.registerDriver(new sun.jdbc.odbc.JdbcOdbcDriver());

//获得连接

Connection conn=DriverManager.getConnection("jdbc:odbc:mydata","sa","");

//创建存储过程的对象

CallableStatement c=conn.prepareCall("{call ModPro(?,?)}");

c.setInt(1,2);

c.setString(2,"美女");

c.execute();

c=conn.prepareCall("{call selePro}");

ResultSet rs=c.executeQuery();

while(rs.next())

{

String Stu=rs.getString("StuID");

String name=rs.getString("StuName");

String add=rs.getString("StuAddress");

System.out.println ("学号:"+" "+"姓名:"+" "+"地址");

System.out.println (Stu+" "+name+" "+add);

}

c.close();

}

}

E:查询数据的存储过程(模糊查询)

-----------------存储过程---------------------

create procedure FindCusts

@cust varchar(10)

as

select customerid from orders where customerid

like '%'+@cust+'%'

---------------执行---------------------------

execute FindCusts 'alfki'

-------------在JAVA中调用--------------------------

import java.sql.*;

public class ProcedureTest

{

public static void main(String args[]) throws Exception

{

//加载驱动

DriverManager.registerDriver(new sun.jdbc.odbc.JdbcOdbcDriver());

//获得连接

Connection conn=DriverManager.getConnection("jdbc:odbc:mydata","sa","");

//创建存储过程的对象

CallableStatement c=conn.prepareCall("{call FindCusts(?)}");

c.setString(1,"Tom");

ResultSet rs=c.executeQuery();

while(rs.next())

{

String cust=rs.getString("customerid");

System.out.println (cust);

}

c.close();

}

}

F:增加数据的存储过程

------------存储过程--------------------

create procedure InsertPro

@StuID int,

@StuName varchar(10),

@StuAddress varchar(20)

as

insert into 学生基本信息表 values(@StuID,@StuName,@StuAddress)

-----------调用存储过程---------------

exec InsertPro 5,'555','555'

-----------在JAVA中执行-------------

import java.sql.*;

public class ProcedureTest

{

public static void main(String args[]) throws Exception

{

//加载驱动

DriverManager.registerDriver(new sun.jdbc.odbc.JdbcOdbcDriver());

//获得连接

Connection conn=DriverManager.getConnection("jdbc:odbc:mydata","sa","");

//创建存储过程的对象

CallableStatement c=conn.prepareCall("{call InsertPro(?,?,?)}");

c.setInt(1,6);

c.setString(2,"Liu");

c.setString(3,"wuhan");

c.execute();

c=conn.prepareCall("{call selePro}");

ResultSet rs=c.executeQuery();

while(rs.next())

{

String stuid=rs.getString("StuID");

String name=rs.getString("StuName");

String address=rs.getString("StuAddress");

System.out.println (stuid+" "+name+" "+address);

}

c.close();

}

}

G:在JAVA中创建存储过程 并且在JAVA中直接调用

import java.sql.*;

public class ProcedureTest

{

public static void main(String args[]) throws Exception

{

//加载驱动

DriverManager.registerDriver(new sun.jdbc.odbc.JdbcOdbcDriver());

//获得连接

Connection conn=DriverManager.getConnection("jdbc:odbc:mydata","sa","");

Statement stmt=conn.createStatement();

//在JAVA中创建存储过程

stmt.executeUpdate("create procedure OOP as select * from 学生成绩表");

CallableStatement c=conn.prepareCall("{call OOP}");

ResultSet rs=c.executeQuery();

while(rs.next())

{

String chinese=rs.getString("Chinese");

System.out.println (chinese);

}

conn.close();

}

}