如何从JDBC Callablestatement访问此存储过程? [英] How to access this stored Procedure from JDBC Callablestatement?

问题描述

如何从JDBC Callablestatement访问此存储过程?

How to access this stored Procedure from JDBC Callablestatement ??

public class TestOCIApp {

public static void main(String args[]) throws ClassNotFoundException,
SQLException {

try {
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection(
"jdbc:oracle:thin:@localhost:1521:orcle", "scott", "tiger");

CallableStatement cs = conn.prepareCall("{call test(?,?)}");
cs.setInt(1, 10);

cs.registerOutParameter(2, oracle.jdbc.OracleTypes.CURSOR);

ResultSet rs = (ResultSet)cs.getObject(2);

while(rs.next())
{
System.out.println(rs.getString(2));
}

conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}

我收到Exception

I am getting Exception as

java.sql.SQLException:无效的列索引 *位于oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:180)* *位于oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:222)* *位于oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:285)* *位于oracle.jdbc.driver.OracleStatement.prepare_for_new_get(OracleStatement.java:2804)* *位于oracle.jdbc.driver.OracleStatement.getObjectValue(OracleStatement.java:4983)* *位于oracle.jdbc.driver.OracleStatement.getObjectValue(OracleStatement.java:4964)* *位于oracle.jdbc.driver.OracleCallableStatement.getObject(OracleCallableStatement.java:586)* *位于TestOCIApp.main(TestOCIApp.java:23)*

java.sql.SQLException: Invalid column index * at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:180)* * at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:222)* * at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:285)* * at oracle.jdbc.driver.OracleStatement.prepare_for_new_get(OracleStatement.java:2804)* * at oracle.jdbc.driver.OracleStatement.getObjectValue(OracleStatement.java:4983)* * at oracle.jdbc.driver.OracleStatement.getObjectValue(OracleStatement.java:4964)* * at oracle.jdbc.driver.OracleCallableStatement.getObject(OracleCallableStatement.java:586)* * at TestOCIApp.main(TestOCIApp.java:23)*

create or replace procedure test( p_deptno IN number
, p_cursor OUT SYS_REFCURSOR)
is
begin
open p_cursor FOR
select *
from emp
where deptno = p_deptno;
end test;
/

推荐答案

与oracle游标不对齐时，CallableStatement对象被强制转换为OracleCallableStatement以使用getCursor方法，该方法是标准JDBC应用程序编程接口(API)的Oracle扩展. )，然后将REF CURSOR返回到ResultSet对象.

When dealign with oracle cursors,The CallableStatement object is cast to OracleCallableStatement to use the getCursor method, which is an Oracle extension to the standard JDBC application programming interface (API), and returns the REF CURSOR into a ResultSet object.

cstmt.registerOutParameter(1, OracleTypes.CURSOR);
cstmt.execute();
cursor = ((OracleCallableStatement)cstmt).getCursor(1);

while (cursor.next ()){
System.out.println (cursor.getString(1));
} 

但这会将您的代码耦合到oracle数据库[:(]

But this will couple your code to oracle database [:(]

这篇关于如何从JDBC Callablestatement访问此存储过程?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！