一、Java怎样实现对存储过程的调用:
A:不带输出參数的
create procedure getsum
@n int =0<--此处为參数-->
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)))
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在
SQL中运行:
exec getsum 100
在JAVA中调用:
JAVA能够调用 可是在JAVA程序却不能去显示该存储过程的结果 由于上面的存储过程的參数类型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
{
//载入驱动
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(?)}");
//给存储过程的參数设置值
c.setInt(1,100); //将第一个參数的值设置成100
//运行存储过程
c.execute();
conn.close();
}
}
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B:带输出參数的
1:返回int
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
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在查询分析器中运行:
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
{
//载入驱动
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參数设置值
c.setInt(1,100);
//注冊存储过程的第二个參数
c.registerOutParameter(2,java.sql.Types.INTEGER);
//运行存储过程
c.execute();
//得到存储过程的输出參数值
System.out.println (c.getInt(2));
conn.close();
}
}
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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
运行存储过程:
exec CursorIntoProcedure ''
JAVA调用:
import java.sql.*;
public class ProcedureTest
{
public static void main(String args[]) throws Exception
{
//载入驱动
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();
}
}
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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)
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创建存储过程:
create procedure delePro
@StuID int
as
delete from 学生基本信息表 where StuID=@StuID
--创建完成
exec delePro 1 --运行存储过程
--创建存储过程
create procedure selePro
as
select * from 学生基本信息表
--创建完成
exec selePro --运行存储过程
在JAVA中调用:
import java.sql.*;
public class ProcedureTest
{
public static void main(String args[]) throws Exception
{
//载入驱动
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();
}
}
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D:改动数据的存储过程
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
运行存储过程:
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
{
//载入驱动
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();
}
}
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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+'%'
运行:
execute FindCusts 'alfki'
在JAVA中调用:
import java.sql.*;
public class ProcedureTest
{
public static void main(String args[]) throws Exception
{
//载入驱动
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();
}
}
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F:添加数据的存储过程
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中运行:
import java.sql.*;
public class ProcedureTest
{
public static void main(String args[]) throws Exception
{
//载入驱动
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();
}
}
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G:在JAVA中创建存储过程 而且在JAVA中直接调用
import java.sql.*;
public class ProcedureTest
{
public static void main(String args[]) throws Exception
{
//载入驱动
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();
}
}
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最新内容请见作者的GitHub页:http://qaseven.github.io/