java - 在 Oracle DB 上执行 PreparedStatement 插入 Blob 时出现 NullPointerException

Question

有没有人知道我在这里做错了什么？我正在尝试将一个 blob(其中包含一个 pdf，以防万一)连同一些其他信息一起插入到 oracle 数据库中。我正在使用 PreparedStatement

代码:

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 以正确的形式放置日期，例如返回:
日期 to_date('2013-04-15 09:34:38','yyyy-mm-dd hh24:mi:ss')

执行 PrepStatement 时出现以下异常:

{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)}

我使用的是 Oracle 数据库 10g 10.2.0.3.0 版。请帮忙!

Answer 1

在我的应用程序中，我使用 File 而不是 Blob 作为方法输入，并以这种方式插入 BLOB:

public void insertBlob(String filedesc, File file) {
    Connection con = DriverManager.getConnection(url, username, password);

    InputStream input = new FileInputStream(file);

    PreparedStatement pstmt = con.prepareStatement(
        "insert into schema.table values(?,?)");
    pstmt.setString(1, filedesc);
    pstmt.setBinaryStream(2, input);

    pstmt.execute();
}

也许您需要一些try-catch，但我希望这对您有所帮助。