在Oracle DB上执行PreparedStatement以插入Blob时出现NullPointerException

Question

有没有人知道我在这里做错了什么？我试图将一个blob(包含一个重要的pdf)插入一个oracle db以及一些其他信息.我正在使用PreparedStatement

码:

public void saveReportErgebnis(int reportId, Date erzeugung, int archiv,
        Blob pdf, String kommentar) throws Exception {

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    byte[] tmp = new byte[(int) pdf.length()];
    if(kommentar == null){
        kommentar = "";
    }

    SimpleDateFormat erstellungSdf = new SimpleDateFormat(
            "yyyy-MM-dd HH:mm:ss");

    try {
    pdf.getBinaryStream().read(tmp);

    oracle.sql.BLOB oracleBlob = new oracle.sql.BLOB((OracleConnection) getConnection(), tmp);
    PreparedStatement prepStmt = getRTTDBHandler()
            .createPreparedStatement(
                    "INSERT INTO reportergebnis(report_id, erzeugung, archiv, pdf, kommentar) VALUES (?,?,?,?,?)");
    System.out.println("debug 2 oracle");
        prepStmt.setInt(1, reportId);
        prepStmt.setString(2, formatDateString(erstellungSdf.format(erzeugung)));
        prepStmt.setInt(3, archiv);
        prepStmt.setBlob(4, oracleBlob);
        prepStmt.setString(5, kommentar);
        prepStmt.execute();
    } catch (Exception e) {
        e.printStackTrace();
        loghandler.error(e.toString());
        throw e;
    }

}

(formatCode将Date设置为正确的形式,例如返回:
date to_date('2013-04-15 09:34:38','yyyy-mm-dd hh24:mi:ss')

执行PrepStatement时,我得到以下异常:

{java.lang.ArrayIndexOutOfBoundsException
        at java.lang.System.arraycopy(Native Method)
        at oracle.jdbc.driver.DatumBinder.bind(OraclePreparedStatement.java:18279)
        at oracle.jdbc.driver.OraclePreparedStatement.setupBindBuffers(OraclePreparedStatement.java:3137)
        at oracle.jdbc.driver.OraclePreparedStatement.processCompletedBindRow(OraclePreparedStatement.java:2355)
        at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3579)
        at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3685)
        at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1088)
        at com.nundp.mc.modules.regressionsTest.db.OracleRTTDBHandler.saveReportErgebnis(OracleRTTDBHandler.java:963)
        at com.nundp.mc.modules.regressionsTest.report.ReportController.executeReport(ReportController.java:237)
        at org.apache.jsp.jsp.modules.Testszenario.ReportHandler_jsp._jspService(ReportHandler_jsp.java:156)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
        at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:535)
        at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:472)
        at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
        at org.apache.jsp.jsp.McFrame_jsp._jspService(McFrame_jsp.java:284)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)}

我正在使用Oracle数据库10g版本10.2.0.3.0.请帮忙!

Answer 1

尝试在 oracle.sql.BLOB 上使用 *createTemporary(yourConnection, false, oracle.sql.BLOB.DURATION_CALL)* 函数来创建实例。之后只需使用 setBytes(...) 来设置其内容。