一:无返回值的存储过程
存储过程为:
create or replace
procedure adddept(deptno number,dname varchar2,loc varchar2)
as
begin
insert into dept values(deptno,dname,loc);
end;
然后呢,在java里调用时就用下面的代码:
public class TestProcedure {
Connection conn=null ;
CallableStatement
cstmt=null ;
PreparedStatement pstmt=null ;
String
url="jdbc:oracle:thin:@localhost:1521:mydb";
String
driver="oracle.jdbc.driver.OracleDriver";
String
name="";
public TestProcedure() {
try {
Class.forName(driver);
conn=DriverManager.getConnection(url,"scott","tiger");
cstmt=conn.prepareCall("{call
adddept(?,?,?)}");
cstmt.setInt(1,13);
cstmt.setString(2,"间谍部2");
cstmt.setString(3,"ningbo2");
cstmt.executeUpdate();
System.out.println("success");
}
catch (Exception e){e.printStackTrace();}
finally{
cstmt.close();
conn.close();
}
}
}
dept表为oracle数据库方案scott中的一个表
二:有返回值的存储过程(非列表)
存储过程为:
CREATE OR REPLACE
PROCEDURE TESTB(PARA1 IN
VARCHAR2,PARA2 OUT VARCHAR2) AS
BEGIN
SELECT INTO PARA2
FROM TESTTB WHERE I_ID= PARA1;
END TESTB;
在java里调用时就用下面的代码:
package
com.hyq.src;
public class
TestProcedureTWO {
public
TestProcedureTWO() {
}
public static void
main(String[] args ){
String driver =
"oracle.jdbc.driver.OracleDriver";
String strUrl =
"jdbc:oracle:thin:@127.0.0.1:1521:hyq";
Statement stmt =
null;
ResultSet rs =
null;
Connection conn =
null;
try {
Class.forName(driver);
conn =
DriverManager.getConnection(strUrl, " hyq ", " hyq ");
CallableStatement
proc = null;
proc = conn.prepareCall("{
call HYQ.TESTB(?,?) }");
proc.setString(1,
"100");
proc.registerOutParameter(2,
Types.VARCHAR);
proc.execute();
String testPrint =
proc.getString(2);
System.out.println("=testPrint=is="+testPrint);
}
catch
(SQLException ex2) {
ex2.printStackTrace();
}
catch (Exception
ex2) {
ex2.printStackTrace();
}
finally{
try {
if(rs != null){
rs.close();
if(stmt!=null){
stmt.close();
}
if(conn!=null){
conn.close();
}
}
}
catch
(SQLException ex1) {
}
}
}
}
}
注意,这里的proc.getString(2)中的数值2并非任意的,而是和存储过程中的out列对应的,如果out是在第一个位置,那就是proc.getString(1),如果是第三个位置,就是proc.getString(3),当然也可以同时有多个返回值,那就是再多加几个out参数了。
三:返回列表
由于oracle存储过程没有返回值,它的所有返回值都是通过out参数来替代的,列表同样也不例外,但由于是集合,所以不能用一般的参数,必须要用pagkage了.所以要分两部分,
1, 建一个程序包。如下:
CREATE OR REPLACE
PACKAGE TESTPACKAGE AS
TYPE Test_CURSOR
IS REF CURSOR;
end TESTPACKAGE;
2,建立存储过程,存储过程为:
CREATE OR REPLACE
PROCEDURE TESTC(p_CURSOR out TESTPACKAGE.Test_CURSOR) IS
BEGIN
OPEN p_CURSOR FOR
SELECT * FROM HYQ.TESTTB;
END TESTC;
可以看到,它是把游标(可以理解为一个指针),作为一个out 参数来返回值的。
在java里调用时就用下面的代码:
package
com.hyq.src;
import java.sql.*;
import
java.io.OutputStream;
import
java.io.Writer;
import
java.sql.PreparedStatement;
import
java.sql.ResultSet;
import
oracle.jdbc.driver.*;
public class
TestProcedureTHREE {
public
TestProcedureTHREE() {
}
public static void
main(String[] args ){
String driver =
"oracle.jdbc.driver.OracleDriver";
String strUrl =
"jdbc:oracle:thin:@127.0.0.1:1521:hyq";
Statement stmt =
null;
ResultSet rs =
null;
Connection conn =
null;
try {
Class.forName(driver);
conn =
DriverManager.getConnection(strUrl, "hyq", "hyq");
CallableStatement
proc = null;
proc =
conn.prepareCall("{ call hyq.testc(?) }");
proc.registerOutParameter(1,oracle.jdbc.OracleTypes.CURSOR);
proc.execute();
rs = (ResultSet)proc.getObject(1);
while(rs.next())
{
System.out.println( rs.getString(1) +
" "+rs.getString(2));
}
}
catch (SQLException ex2) {
ex2.printStackTrace();
}
catch (Exception ex2) {
ex2.printStackTrace();
}
finally{
try {
if(rs != null){
rs.close();
if(stmt!=null){
stmt.close();
}
if(conn!=null){
conn.close();
}
}
}
catch (SQLException ex1) {
}
}
}
}