DBMS_XDB.CREATERESOURCE from JAVA

Question

Hi all,
i'm trying to load XML-data into the database with the following pseudocode:
SQLText := "DECLARE
              retB boolean;
              XMLDoc XMLType;
            BEGIN
              XMLDoc := XMLType(?);
              retB   := DBMS_XDB.CREATERESOURCE('Resourcename', XMLDoc);
            END";
SQLStmt := (OraclePreparedStatement) _conn.prepareStatement(SQLText);
SQLStmt.setString(1, xml);
SQLStmt.execute();
It works in JAVA with one exception. All characters using more than one byte in UTF-8 are double encoded. That means, if the XML-String contains an german umlaut ä (U+00E4) this character is encoded as "C3 A4" in the string. After submitting the XML to the database the ä has the value C3 83 C2 A4 => the value C3 is encoded as C3 83 and the value A4 is encoded as C2 A4.
Thats no problem if i query the documents from Java because the way back is the same. But if i retrieve the document over the protocoll server (WebDav or FTP) the character encoding is corrupted (2 characters for ä).
I am using Ora 11.2.0.1 on Linux with ojdbc6.jar. My NLS settings are as follows:
NLS_LANGUAGE             GERMAN
NLS_TERRITORY            GERMANY
NLS_CHARACTERSET         AL32UTF8
NLS_NCHAR_CHARACTERSET   AL16UTF16
On the client GERMAN_GERMANY.WE8MSWIN1252, but i also tried with SET NLS_LANG=GERMAN_GERMANY.AL32UTF8 because of the UTF coding of the XML string.
What I am doing the wrong way?
Thanks for your help,
regards
Frank

Answer 1

Hi odie_63,
thanks for your reply. I have extracted the relevant code of the program into a tiny test application.
package project1;
import java.sql.Connection;
import java.sql.DriverManager;
import java.text.MessageFormat;
import oracle.jdbc.OraclePreparedStatement;
import oracle.ucp.jdbc.PoolDataSource;
import oracle.ucp.jdbc.PoolDataSourceFactory;
public class Application1 {
    public static void main(String[] args) {
        try {
            doSimpleTest();
        } catch (Exception e) {
            e.printStackTrace();
    public static void doSimpleTest(){
        System.out.println("doing simple test case...");
        final String insertSQL    = "  DECLARE\n" +
                                    "    retB boolean;\n" +
                                    "    XMLDoc XMLType;\n" +
                                    "  BEGIN\n" +
                                    "    XMLDoc := XMLType(?);\n" +
                                    "    retB   := DBMS_XDB.CREATERESOURCE({0},XMLDoc);         \n" +
                                    "  END;";  
        final String xml            = "<?xml version=\"1.0\" encoding=\"utf-8\"?><test xmlns=\"http://www.gfai.de/Test\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xsi:schemaLocation=\"http://www.gfai.de/Test http://www.gfai.de/Test\">äöü</test>";
        String SQL_QUERY          = null;
        PoolDataSource _pds       = null;
        Connection _conn          = null;
        OraclePreparedStatement s = null;
        try{
            DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
            //Creating a pool-enabled data source
            _pds = PoolDataSourceFactory.getPoolDataSource();
            //Setting connection properties of the data source
            _pds.setConnectionFactoryClassName("oracle.jdbc.pool.OracleDataSource");
            _pds.setURL("jdbc:oracle:thin:@10.10.182.110:1521:ORALX64");
            _pds.setUser("test");
            _pds.setPassword("tset");
            //Setting pool properties
            _pds.setInitialPoolSize(5);
            _pds.setMinPoolSize(5);
            _pds.setMaxPoolSize(10);
            // connection           
            _conn = _pds.getConnection();  
            // Insert
            SQL_QUERY = MessageFormat.format(insertSQL, new Object[]{"'/public/test/test.xml'"});
            s = (OraclePreparedStatement) _conn.prepareStatement(SQL_QUERY);
            s.setString(1, new String(xml.getBytes("UTF-8")));
            s.execute();
            System.out.println("inserted...");
        catch(Exception ex){
            ex.printStackTrace();
        finally{
            try{s.close();_conn.close();}catch(Exception ex){};
        return;
Before running the test it's required to set up the user test and the XML-schema. I have done it with the following lines of code:
CONNECT SYSTEM;
CREATE USER TEST IDENTIFIED BY "tset";
GRANT CREATE SESSION TO TEST;
GRANT RESOURCE TO TEST;
DECLARE
  RETB BOOLEAN;
BEGIN
  RETB := DBMS_XDB.CREATEFOLDER('/sys/schemas/PUBLIC/www.gfai.de');
  RETB := DBMS_XDB.CREATEFOLDER('/sys/schemas/PUBLIC/www.gfai.de/test');
  RETB := DBMS_XDB.CREATEFOLDER('/public/test');
  COMMIT;
END;
CREATE OR REPLACE DIRECTORY TEST_DIR AS '/home/oracle';
GRANT  READ ON DIRECTORY TEST_DIR TO test;
BEGIN
  DBMS_XMLSCHEMA.registerSchema(
SCHEMAURL => 'http://www.gfai.de/Test',
SCHEMADOC => BFILENAME('TEST_DIR','Test.xsd'),
LOCAL => FALSE,
GENTYPES => TRUE,
GENTABLES => TRUE);
END;
After executing the test case i get the following results with sqlplus:
SQL> select dump(extractvalue(object_value,'/test')) from test_document;
DUMP(EXTRACTVALUE(OBJECT_VALUE,'/TEST'))
Typ=1 Len=12: 195,131,194,164,195,131,194,182,195,131,194,188
SQL>
The whole document is saved as
SQL> select xdburitype('/public/test/test.xml').getblob() from dual;
XDBURITYPE('/PUBLIC/TEST/TEST.XML').GETBLOB()
3C3F786D6C2076657273696F6E3D22312E302220656E636F64696E673D225554462D38223F3E0A3C
7465737420786D6C6E733D22687474703A2F2F7777772E676661692E64652F546573742220786D6C
6E733A7873693D22687474703A2F2F7777772E77332E6F72672F323030312F584D4C536368656D61
2D696E7374616E636522207873693A736368656D614C6F636174696F6E3D22687474703A2F2F7777
772E676661692E64652F5465737420687474703A2F2F7777772E676661692E64652F54657374223E
C383C2A4C383C2B6C383C2BC3C2F746573743E0A
SQL>
The schema definition file is as follows:
<?xml version="1.0" encoding="windows-1252" ?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            xmlns="http://www.gfai.de/Test"
            targetNamespace="http://www.gfai.de/Test"
            elementFormDefault="qualified"
            xmlns:xdb="http://xmlns.oracle.com/xdb"
            xdb:storeVarrayAsTable="true">
  <xsd:element name="test" xdb:defaultTableSchema="TEST"
               xdb:defaultTable="TEST_DOCUMENT">
    <xsd:complexType>
      <xsd:simpleContent>
        <xsd:extension base="xsd:string">
        </xsd:extension>
      </xsd:simpleContent>
    </xsd:complexType>
  </xsd:element>
</xsd:Schema>
thanks again,
regards
Frank