生成的 Excel 文件上的 ZK API Range.insert 出现 NullPointerException (JExcel/Apache POI)

发布于 2024-10-27 06:21:21 字数 4499 浏览 1 评论 0原文

帮朋友的忙,她的疑问如下:

嗨!我目前正在使用 jexcelapi 创建excel文件,然后我读 他们使用 zk 电子表格。我尝试过 在文档中找到的代码 插入列和移动单元格 到右边但不幸的是,一个空 每当我出现指针异常 尝试插入/移动单元格。我也 尝试上传excel文件我 使用 jexcelapi 创建到 zssapp (只是为了确定)但是一个空指针 也出现了。但当我尝试阅读时 由 MS Excel 创建的 excel 文件, 工作正常。有谁遇到过 以前有这个问题吗?任何帮助都会 非常感谢。 PS:我也 尝试使用 POI 创建文件。我 还遇到空指针 异常。

这是错误:

  java.lang.NullPointerException
at org.zkoss.poi.hssf.record.XFExtRecord.cloneXFExtFrom(XFExtRecord.java:91)
at org.zkoss.poi.hssf.usermodel.HSSFCellStyle.cloneStyleFrom(HSSFCellStyle.java:835)
at org.zkoss.poi.hssf.usermodel.HSSFCellStyle.cloneStyleFrom(HSSFCellStyle.java:825)
at org.zkoss.zss.model.impl.BookHelper.copyFromStyleExceptBorder(BookHelper.java:3308)
at org.zkoss.zss.model.impl.HSSFSheetImpl.shiftColumnsRange(HSSFSheetImpl.java:601)
at org.zkoss.zss.model.impl.BookHelper.insertHSSFRange(BookHelper.java:1942)
at org.zkoss.zss.model.impl.BookHelper.insertRange(BookHelper.java:1931)
at org.zkoss.zss.model.impl.RangeImpl.insert(RangeImpl.java:649)
at data.InitWindow.onClick$shiftCellRight(InitWindow.java:102)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.zkoss.zk.ui.event.GenericEventListener.onEvent(GenericEventListener.java:81)
at org.zkoss.zk.ui.impl.EventProcessor.process0(EventProcessor.java:192)
at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:138)
at org.zkoss.zk.ui.event.Events.sendEvent(Events.java:305)
at org.zkoss.zk.ui.event.Events.sendEvent(Events.java:328)
at org.zkoss.zk.ui.AbstractComponent$ForwardListener.onEvent(AbstractComponent.java:3022)
at org.zkoss.zk.ui.impl.EventProcessor.process0(EventProcessor.java:192)
at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:138)
at org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1603)
at org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1387)
at org.zkoss.zk.ui.impl.UiEngineImpl.execUpdate(UiEngineImpl.java:1107)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.process(DHtmlUpdateServlet.java:563)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.doGet(DHtmlUpdateServlet.java:457)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.doPost(DHtmlUpdateServlet.java:465)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
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:127)
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:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)

这是我用来创建的代码 文件。我在这里所做的是创建一个 每当创建表单时都会生成 excel 文件:

public void createExcel(Integer formID, String loc){
    try {
        File path = new File(loc);
        if (!path.exists()) {
            boolean status = path.mkdirs();
        }
        String filename = loc + formID +".xls";
        WorkbookSettings ws = new WorkbookSettings();
        ws.setLocale(new Locale("en", "EN"));
        WritableWorkbook workbook;
        workbook = Workbook.createWorkbook(new File(filename), ws);
        workbook.createSheet("Sheet1", 0);
        workbook.write();
        workbook.close();  
    } catch (IOException e) {
        e.printStackTrace();
    } catch (WriteException e) {
        e.printStackTrace();
    }   
}

据我所知,她使用 gwt 框架作为使用 zk 类的桥梁。

此查询的原始帖子可以在这里找到: http://www.zkoss.org/forum/ listComment/15683

非常感谢大家!

Favor for a friend, here's her query:

Hi! I am currently using jexcelapi to
create excel files and then I read
them using zk spreadsheet. I tried the
code found in the documentation for
inserting columns and shifting cells
to the right but unfortunately, a null
pointer exception shows up whenever I
try to insert/shift cells. I also
tried uploading the excel files I
created using jexcelapi to the zssapp
(just to be sure) but a null pointer
also shows up. But when I try to read
excel files created by MS Excel, it
works fine. Has anyone encountered
this problem before? Any help would
greatly be appreciated. PS: I also
tried using POI to create files. I
also encounter a null pointer
exception.

Here is the error:

  java.lang.NullPointerException
at org.zkoss.poi.hssf.record.XFExtRecord.cloneXFExtFrom(XFExtRecord.java:91)
at org.zkoss.poi.hssf.usermodel.HSSFCellStyle.cloneStyleFrom(HSSFCellStyle.java:835)
at org.zkoss.poi.hssf.usermodel.HSSFCellStyle.cloneStyleFrom(HSSFCellStyle.java:825)
at org.zkoss.zss.model.impl.BookHelper.copyFromStyleExceptBorder(BookHelper.java:3308)
at org.zkoss.zss.model.impl.HSSFSheetImpl.shiftColumnsRange(HSSFSheetImpl.java:601)
at org.zkoss.zss.model.impl.BookHelper.insertHSSFRange(BookHelper.java:1942)
at org.zkoss.zss.model.impl.BookHelper.insertRange(BookHelper.java:1931)
at org.zkoss.zss.model.impl.RangeImpl.insert(RangeImpl.java:649)
at data.InitWindow.onClick$shiftCellRight(InitWindow.java:102)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.zkoss.zk.ui.event.GenericEventListener.onEvent(GenericEventListener.java:81)
at org.zkoss.zk.ui.impl.EventProcessor.process0(EventProcessor.java:192)
at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:138)
at org.zkoss.zk.ui.event.Events.sendEvent(Events.java:305)
at org.zkoss.zk.ui.event.Events.sendEvent(Events.java:328)
at org.zkoss.zk.ui.AbstractComponent$ForwardListener.onEvent(AbstractComponent.java:3022)
at org.zkoss.zk.ui.impl.EventProcessor.process0(EventProcessor.java:192)
at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:138)
at org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1603)
at org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1387)
at org.zkoss.zk.ui.impl.UiEngineImpl.execUpdate(UiEngineImpl.java:1107)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.process(DHtmlUpdateServlet.java:563)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.doGet(DHtmlUpdateServlet.java:457)
at org.zkoss.zk.au.http.DHtmlUpdateServlet.doPost(DHtmlUpdateServlet.java:465)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
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:127)
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:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)

And here is the code I use to create
files. What I do here is create an
excel file whenever a form is created:

public void createExcel(Integer formID, String loc){
    try {
        File path = new File(loc);
        if (!path.exists()) {
            boolean status = path.mkdirs();
        }
        String filename = loc + formID +".xls";
        WorkbookSettings ws = new WorkbookSettings();
        ws.setLocale(new Locale("en", "EN"));
        WritableWorkbook workbook;
        workbook = Workbook.createWorkbook(new File(filename), ws);
        workbook.createSheet("Sheet1", 0);
        workbook.write();
        workbook.close();  
    } catch (IOException e) {
        e.printStackTrace();
    } catch (WriteException e) {
        e.printStackTrace();
    }   
}

From what I've found out, she's using a gwt frame as a bridge to use zk classes.

The original post of this query can be found here: http://www.zkoss.org/forum/listComment/15683

Thanks very much guys!

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当爱已成负担 2024-11-03 06:21:21

这是错误的根源:

public void onClick$insertCol() {
    int tRow = currSheet.getFirstRowNum();
    int bRow = currSheet.getPhysicalNumberOfRows();
    Ranges.range(currSheet, tRow, colIndex, bRow, colIndex).insert(Range.SHIFT_RIGHT, Range.FORMAT_RIGHTBELOW);
}

如果我将单元格向右移动,该错误也会显示。

Here is where the error originated:

public void onClick$insertCol() {
    int tRow = currSheet.getFirstRowNum();
    int bRow = currSheet.getPhysicalNumberOfRows();
    Ranges.range(currSheet, tRow, colIndex, bRow, colIndex).insert(Range.SHIFT_RIGHT, Range.FORMAT_RIGHTBELOW);
}

The error also shows up if I shift cells to the right.

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