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 varchar(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();
}
}