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用Java实现Oracle数据库增删集合元素

  Oracle数据库中增删集合元素的操作该如何实现呢?其实利用Java Function就可以轻松的实现,本文我们就主要介绍这一实现方法。

  源程序如下:以下是代码片段:package zgdx.action; import java.math.BigDecimal;

  import java.sql.Array;

  //import java.sql.Connection;

  import java.sql.DriverManager;

  import java.sql.SQLException;

  import java.util.ArrayList;

  import java.util.logging.Level;

  import java.util.logging.Logger;

  import oracle.jdbc.*;

  import oracle.sql.ARRAY;

  import oracle.sql.ArrayDescriptor; public class OraTools {

  static public Array addElementOfArray(ARRAY ary, Object e){

  try {

  Object[] bigs = null;

  if(ary==null) bigs = new Object[0];

  else bigs = (Object[]) ary.getArray();

  for(int i=0; i

  if(e.equals(bigs[i])){ return ary; }

  Object[] objs = new Object[bigs.length+1];

  for(int i=0; i

  objs[objs.length-1] = e;

  OracleConnection conn = (OracleConnection) DriverManager.getConnection("jdbc:default:connection:");

  //((OracleConnection)conn.unwrap(OracleConnection.class))

  //Array arr = conn.createARRAY(typeName.toUpperCase(), objs ); //11g r1

  Array arr = new ARRAY(ArrayDescriptor.createDescriptor( ary.getSQLTypeName(), conn), conn, objs);

  return arr;

  } catch (SQLException ex) {

  //Logger.getLogger(OraTools.class.getName())。log(Level.SEVERE, null, ex);

  System.err.println("ERROR! addElementOfVarray: " + ex.getMessage());

  return ary; } static public Array delElementOfArray(ARRAY ary, Object e){

  try {

  if( ary==null) return null;

  Object[] bigs = (Object[]) ary.getArray();

  ArrayList list = new ArrayList(bigs.length);

  for(int i=0; i

  if( ! e.equals(bigs[i])){ list.add(bigs[i]); }

  if(list.size()==bigs.length) return ary;

  Object[] objs = list.toArray();

  OracleConnection conn = (OracleConnection) DriverManager.getConnection("jdbc:default:connection:");

  //Array arr = conn.createARRAY(typeName.toUpperCase(), objs ); //11g r1

  Array arr = new ARRAY(ArrayDescriptor.createDescriptor(ary.getSQLTypeName(), conn), conn, objs);

  return arr;

  } catch (SQLException ex) {

  System.err.println("ERROR! addElementOfVarray: " + ex.getMessage());

  return ary; }

  }然后发布:loadjava -f -v -user username/passwd -r OraTools.java建call spec:以下是代码片段:CREATE OR REPLACE function addElementOfInt_nt(ary int_nt, dept_id NUMBER)

  return int_nt AS LANGUAGE JAVA NAME 'zgdx.action.OraTools.addElementOfArray(java.sql.Array, java.lang.Object)

  return java.sql.Array';测试:update test1 set cates = addElementOfInt_nt(cates, 10) where code=1;关于Oracle数据库中增删集合元素的Java Function的实现方法就介绍到这里了,希望本次的介绍能够对您有所帮助。