ORACLE存储过程的数组参数 http://www.examw.com/biancheng/oracle/158294/ 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: package com.nilpower.test; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; public class Test { public static void main(String[] args) { try { Class.forName(“oracle.jdbc.driver.OracleDriver”); String url = “jdbc:oracle:thin:@127.0.0.1:1521:nilpower”; Connection con = DriverManager.getConnection(url, “scott”, “tiger”); PreparedStatement pstmt = null; String sql = “{call batch_cableline_point(?)}”; pstmt = con.prepareCall(sql); Object[][] object1 = new Object[10][5]; int max = 3615142;// 由于表有索引 for (int i = 0; i 《 10; i++) { object1[i][0] = ++max; object1[i][1] = 158870593; object1[i][2] = 333; object1[i][3] = 444; object1[i][4] = 555; } oracle.sql.ArrayDescriptor desc = oracle.sql.ArrayDescriptor .createDescriptor(“ARRAY_CABLELINE_POINT”, con); oracle.sql.ARRAY array = new oracle.sql.ARRAY(desc, con, object1); pstmt.setArray(1, array); pstmt.executeUpdate();
} catch (Exception e) { e.printStackTrace(); } } } 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. |
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