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Asked: 2026-05-24T07:27:52+00:00

I’m making a web app that needs to load and save UTF-8 (Korean, specifically)

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I’m making a web app that needs to load and save UTF-8 (Korean, specifically) characters from a DB. I’ve been given an account on the Oracle 10g server, but it saves VARCHAR2 type columns as ASCII7, with each UTF-8 character taking 2 VARCHAR2 slots.

I assumed that since iBatis is writing in the same way that it is reading, if I treat everything from input to output as UTF-8 I will have no problems, but any Korean characters I input come out garbled.

Is there a way to do this properly without messing up the (someone else’s) DB?

Further information:

I’ve previously been able to load Korean strings using:

ResultSet rs = ps.executeQuery();
String koreanString = new String(rs.getBytes("colname"), "euc-kr");

And write Korean strings to db using:

PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, new String(koreanString.getBytes("euc-kr"), "ISO-8859-1"));

Attempts to change the JDBC connection url result in this message:

Description

Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The Connection descriptor used by the client was:
[ip]:myTablespace?useUnicode=true&characterEncoding=UTF-8

error dump 

javax.servlet.ServletException: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The Connection descriptor used by the client was:
[ip]:myTablespace?useUnicode=true&characterEncoding=UTF-8

at jeus.servlet.jsp2.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:859)
at jeus.servlet.jsp2.runtime.PageContextImpl.handlePageException(PageContextImpl.java:789)
at jeus_jspwork._jsp._500_managerAdmin_5fjsp._jspService(_500_managerAdmin_5fjsp.java:452)
at jeus.servlet.jsp2.runtime.HttpJspBase.service(HttpJspBase.java:95)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at jeus.servlet.jsp.JspServletWrapper.executeServlet(JspServletWrapper.java:147)
at jeus.servlet.servlets.JspServlet.execute(JspServlet.java:365)
at jeus.servlet.engine.HttpRequestProcessor.run(HttpRequestProcessor.java:284)

root cause

java.sql.SQLException: Listener refused the connection with the following error:
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
The Connection descriptor used by the client was:
[ip]:myTablespace?useUnicode=true&characterEncoding=UTF-8

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:261)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:441)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
at java.sql.DriverManager.getConnection(DriverManager.java:525)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at com.ibatis.common.jdbc.SimpleDataSource.popConnection(SimpleDataSource.java:580)
at com.ibatis.common.jdbc.SimpleDataSource.getConnection(SimpleDataSource.java:222)
at com.ibatis.sqlmap.engine.transaction.jdbc.JdbcTransaction.init(JdbcTransaction.java:48)
at com.ibatis.sqlmap.engine.transaction.jdbc.JdbcTransaction.getConnection(JdbcTransaction.java:89)
at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeQueryForObject(MappedStatement.java:120)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:518)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:493)
at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForObject(SqlMapSessionImpl.java:106)
at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForObject(SqlMapClientImpl.java:82)
at [].admRole.getCount(admRole.java:44)
at jeus_jspwork._jsp._500_managerAdmin_5fjsp._jspService(_500_managerAdmin_5fjsp.java:145)
at jeus.servlet.jsp2.runtime.HttpJspBase.service(HttpJspBase.java:95)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at jeus.servlet.jsp.JspServletWrapper.executeServlet(JspServletWrapper.java:147)
at jeus.servlet.servlets.JspServlet.execute(JspServlet.java:365)
at jeus.servlet.engine.HttpRequestProcessor.run(HttpRequestProcessor.java:284)
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1 Answer

  1. Editorial Team

    As I stated in the question, strings are stored and retrieved correctly if they are re-encoded as EUC-KR before being turned into ISO-8859-1 (to save, or vice versa to retrieve).

    I modified the two following classes:

    com.ibatis.sqlmap.engine.mapping.parameter.ParameterMap

    com.ibatis.sqlmap.engine.mapping.result.ResultMap

    In both cases, I took the Object[] array (parameters and columnValues), casted to String, and applied the encoding transformations.

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