http://blog.csdn.net/louie520/archive/2008/11/18/3326892.aspx,这是原文的地址。
环境:Eclipse+Oracle9.0.2+Tomcat5.5
功能:采用存储过程、type组合来实现批量入库,以节省系统开销,提高效率。
*
sql脚本+测试代码:
* 1)create or replace type t_cableLine_point as object
(
ID NUMBER(10),
CABLELINEID NUMBER(10),
ROADPOINTID NUMBER(10),
ORDERNUM NUMBER(10),
REMARK NUMBER(10)
)
* 2)CREATE OR REPLACE TYPE ARRAY_cableLine_point AS table OF t_cableLine_point
* 3)create table RSC_CABLELINE_POINT
(
ID NUMBER(10) not null,
CABLELINEID NUMBER(10) not null,
ROADPOINTID NUMBER(10) not null,
ORDERNUM NUMBER(10),
REMARK NUMBER(10)
)
* 4)create or replace procedure batch_cableline_point(i_object in ARRAY_cableLine_point) is
begin
insert into RSC_CABLELINE_POINT
(ID, CABLELINEID, ROADPOINTID, ORDERNUM, REMARK)
select ID, CABLELINEID, ROADPOINTID, ORDERNUM, REMARK
from the (select cast(i_object as ARRAY_cableLine_point) from dual);
end batch_cableline_point;
* 5)测试代码:
1. public class Test {
2.
3. public static void main(String[] args){
4. try{
5. Class.forName("oracle.jdbc.driver.OracleDriver");
6. String url="jdbc:oracle:thin:@192.168.1.2:1521:***";
7. Connection con = DriverManager.getConnection(url, "***","***");
8. PreparedStatement pstmt = null;
9. String sql = "{call batch_cableline_point(?)}";
10.
11. pstmt = con.prepareCall(sql);
12. Object[][] object1=new Object[10][5];
13. int max = 3615142;//由于表有索引
14. for ( int i=0;i<10;i++){
15. object1[i][0]=++max;
16. object1[i][1]=158870593;
17. object1[i][2]= 333;
18. object1[i][3]= 444;
19. object1[i][4]= 555;
20. }
21.
22. oracle.sql.ArrayDescriptor desc = oracle.sql.ArrayDescriptor.createDescriptor("ARRAY_CABLELINE_POINT",con);
23. oracle.sql.ARRAY array = new oracle.sql.ARRAY(desc,con,object1);
24.
25. pstmt.setArray(1, array);
26. pstmt.executeUpdate();
27. } catch (Exception e) {
28. e.printStackTrace();
29. }
30. }
31. }
32.
备注:如果在入库的过程中发现字符串的值没有入进去,请检查有没有加载该类库nls_charset12.jar
* 该文章是参考“风雪”文章后个人试验的存档。
*
* 其他参考:(引用2008-5-24 04:49 Aowken)
* Tomcat+Oracle调用存储过程郁闷之旅
今天在改公司管理系统的时候,因为某个功能需要使用数组类型作为IN参数调用存储过程,看了看文档发现有Varray、nested table,但Varray有个最多数量的限制,也只好用nested table了,于是引发一连串的问题。
环境:
java version "1.6.0_05"
Java(TM) SE Runtime Environment (build 1.6.0_05-b13)
Java HotSpot(TM) Client VM (build 10.0-b19, mixed mode, sharing)
apache-tomcat-6.0.16
Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
PL/SQL Release 9.2.0.1.0 - Production
CORE 9.2.0.1.0 Production
TNS for 32-bit Windows: Version 9.2.0.1.0 - Production
NLSRTL Version 9.2.0.1.0 - Production
本来对Java这种据说很先进的东西就懵懵懂懂,索性就真的以为他非常牛X。使用几维数组作为参数调用存储过程还不是跟Set个String一样那么简单,但其实我错了,所以我也对java很失望,他远不如想象中那么XX。
Object arrInt[] = {0,1,2,3,4,5,6};
callStmt.SetObject(1, arrInt, Types.ARRAY);
要是想像上面这样操作他就会抛个java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to oracle.sql.ARRAY,于是我知道java他不会自己转,非得人工干预。但我突然发现自己很愚蠢,我都没告诉他procedure参数的类型,即使可以转过去又有个P用,百度了一下才知道得用下面的法子。
import oracle.sql.ARRAY;
import oracle.sql.ArrayDescriptor;
Connnection conn = DBConnManager.getConnection();
callStmt = conn.prepareCall(sql);
ArrayDescriptor arrDesc = ArrayDescriptor.createDescriptor("dbms_sql.Varchar2_Table", conn);
ARRAY arr = new ARRAY(arrDesc, conn, arrInt);
执行一下,结果异常。我靠数据库里能用dbms_sql.Varchar2_Table声明,他居然 java.sql.SQLException: 无效的名称模式: DBMS_SQL.VARCHAR2_TABLE。我心想是不是得写成SYS.dbms_sql.Varchar2_Table,结果还是一样。再百度,人们说这样不行,原因...不知道,但必须得自己定义类型才可以。于是我不得不
create type numbertable as table of number;
ArrayDescriptor arrDesc = ArrayDescriptor.createDescriptor("numbertable", conn);
ARRAY arr = new ARRAY(arrDesc, conn, arrInt);
结果又来了个java.sql.SQLException: 无效的名称模式: baby.numbertable。我无语还得百度!@#¥%....N久无果!但我发别人的码的代码里这个类型都是大写,于是我也写成 NUMBERTABLE。哈哈,果然不出那个异常了。但他NND又蹦个java.lang.ClassCastException: org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper cannot be cast to oracle.jdbc.OracleConnection出来。这下郁闷了,莫非从DBCP拿出来的Connection跟 OracleConnection不一样。晕了,别介呀,我对java不懂!又search了半天,发现了一个UnWrapper,本以为能把这个 Wrapper给干掉的,但搞了半天没搞明白。过了XX时间,不知道是在哪国网站上看到有人
ArrayDescriptor arrDesc = ArrayDescriptor.createDescriptor("NUMBERTABLE", ((DelegatingConnection)conn).getDelegate()));
他们用着都好用,到我这((DelegatingConnection)conn).getDelegate()出来的Connection是个null,很郁闷。后来又看到
public static Connection getNativeConnection(Connection con) throws SQLException {
if (con instanceof DelegatingConnection) {
Connection nativeCon = ((DelegatingConnection) con).getInnermostDelegate();
// For some reason, the innermost delegate can be null: not for a
// Statement's Connection but for the Connection handle returned by the pool.
// We'll fall back to the MetaData's Connection in this case, which is
// a native unwrapped Connection with Commons DBCP 1.1.
return (nativeCon != null ? nativeCon : con.getMetaData().getConnection());
}
return con;
}
可((DelegatingConnection) con).getInnermostDelegate();依然是null但con.getMetaData().getConnection());得到了一个OracleConnection,debug时看着eclipse variables的窗口心中一阵暗喜,该OK了吧!
哎,事实上最近一段时间总是事与愿违,执行-又异常了!郁闷,一次比一次郁闷,一次比一次怪异!
java.lang.ClassCastException: oracle.jdbc.driver.OracleConnection cannot be cast to oracle.jdbc.OracleConnection 由于字符串太长搜都搜不到,想了好久,尝试着各种各样的方法!终于有一个次把tomcat/lib目录classes12.jar删掉,没有异常,一切 OK!但后来把classes12.jar又仍进去了,还正常的,代码没有一点变化!很是郁闷,但既然问题没了,也就懒得看了!
最后的代码:
-----------------------------------------------------------------------------------
public static Connection getConnection() {
Connection con = null;
try {
Context ic = new InitialContext();
DataSource ds = (DataSource) ic.lookup("java:comp/env/jdbc/yoyo");
con = ds.getConnection();
} catch (Exception e) {
System.out.println("**** error DataSource");
}
return con;
}
-----------------------------------------------------------------------------------
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.CallableStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
import java.util.ArrayList;
import oracle.sql.ARRAY;
import oracle.sql.ArrayDescriptor;
import org.apache.tomcat.dbcp.dbcp.DelegatingConnection;
public class BussinessLog {
public static ArrayList CancelLog(String sLoginUser, Object[] arrLogID)
{
ArrayList arrList = new ArrayList();
Connection conn = null;
CallableStatement callStmt = null;
String sql = null;
ArrayDescriptor arrDesc = null;
try
{
conn = DbConnectionManager.getConnection();
sql = "{call P_CanceltLog(?,?,?,?)}";
callStmt = conn.prepareCall(sql);
arrDesc = ArrayDescriptor.createDescriptor("NUMBERTABLE", getNativeConnection(conn));
ARRAY arr = new ARRAY(arrDesc, getNativeConnection(conn), arrLogID);
callStmt.setString(1, sLoginUser);
callStmt.setObject(2, arr, Types.ARRAY);
callStmt.registerOutParameter(3, Types.VARCHAR);
callStmt.registerOutParameter(4, Types.INTEGER);
callStmt.execute();
arrList.add(callStmt.getInt(4));
arrList.add(callStmt.getString(3));
return arrList;
} catch (Exception e) {
System.out.println(e.toString());
} finally {
DbAction.clear(conn, callStmt);
}
return arrList;
}
public static Connection getNativeConnection(Connection con) throws SQLException {
if (con instanceof DelegatingConnection) {
Connection nativeCon = ((DelegatingConnection) con).getInnermostDelegate();
// For some reason, the innermost delegate can be null: not for a
// Statement's Connection but for the Connection handle returned by the pool.
// We'll fall back to the MetaData's Connection in this case, which is
// a native unwrapped Connection with Commons DBCP 1.1.
return (nativeCon != null ? nativeCon : con.getMetaData().getConnection());
}
return con;
}
}
-----------------------------------------------------------------------------------
A. 在这之前我还下载了最新的commons-dbcp-1.2.2.jar,但使用里面DelegatingConnection时,con instanceof DelegatingConnection是false,看来tomcat里出来的Connection就的配Tomcat\lib\tomcat- dbcp.jar里的DelegatingConnection,还真是什么枪打什么鸟。
B.偶尔发现 ((DelegatingConnection) con).getInnermostDelegate();之所以返回null是因为tomcat里Context.Resource的 accessToUnderlyingConnectionAllowed参数默认为false所致,被设置成true之后是可以取到 OracleConnection的.