java - 在 focframework 中，我如何制作一个按钮来打印多个 Jasper 报告，这些报告在一次打印中连接在一起

Question

我正在使用 focframework构建我的网络应用程序。我已经在 focframework 中独立开发并正常工作了一些独立的 Jasper 报告。现在我想要一个按钮，通过将它们连接在同一个 PDF 文件中，可以一次打印它们。

显然我会使用 Vaadin BrowserWindowOpener 如下。但是我应该准备一个资源对象。

StreamResource resource = ???;
BrowserWindowOpener browserWindowOpener = new BrowserWindowOpener(resource);
browserWindowOpener.extend(button);

知道如何将 Jasper 报告的串联放置在 StreamResource 对象中吗？

我知道有一些答案可以解释一般如何做，但因为我使用的是 focframework我想要一个更有针对性的答案，允许我使用现有的焦点开发(如果有的话)。

Answer 1

正如您在问题中提到的，使用 BrowserWindowOpener 看起来是正确的方法。

StreamResource resource = ???;
BrowserWindowOpener browserWindowOpener = new BrowserWindowOpener(resource);
browserWindowOpener.extend(button);

要获取“StreamResource 资源”，我们可以执行以下操作:

StreamResource resource = new StreamResource(streamSource, "printnig_"+System.currentTimeMillis()+".pdf");
resource.setMIMEType("application/pdf");

现在我们需要一个 com.vaadin.server.StreamSource 类型的 streamSource。为此，我们有一个连接报告的专用类，我希望这能满足您的需求:

FStreamSource_Report<MyUserDataClass> streamSource = new FStreamSource_Report<MyUserDataClass>(myUserDataClassInstance) {
protected void init(int reportIndex){
    //init to print the report at reportIndex.
}

protected void shut(int reportIndex){
    //dispose the necessary data for reportIndex
}

protected boolean next(int reportIndex){
    //Return true if you have a report to print at reportIndex
}

protected String getReportFileName(int reportIndex){
    //Return the report filename at reportIndex
}

protected JRFocObjectParameters getParams(int reportIndex){
    //Return the JRFocObjectParameters needed for reportIndex
}

protected JRFocListDataSource getDataSource(int reportIndex){
    //Return the Jasper/foc Data source for the Jasper details section at reportIndex
}

您显然必须实现上面列出的不同方法。这些方法调用将告诉 FStreamSource_Report 它有多少底层报表，并且每次都会调用它们来为这些报表准备数据。

MyUserDataClass:是您选择的一个类，您可以使用 getUserData() 在不同的方法实现中访问它；

这是一个例子: FStreamSource_Report streamSource = new FStreamSource_Report(prodProgram) {

    private PrintingAction printingAction = null;

    @Override
    protected void init(int reportIndex) {
        if(reportIndex == 0){//Raw Material printout 
            ProductionProgram productionProgram = getUserData();
            printingAction = RawMaterialReportDesc.getInstance().newPrintingAction();
            printingAction.setObjectToPrint(productionProgram);
            printingAction.initLauncher();

        }else if(reportIndex == 1){//Production Steps
            ProductionProgram productionProgram = getUserData();
            printingAction = ProductionStepsReportDesc.getInstance().newPrintingAction();
            printingAction.setObjectToPrint(productionProgram);
            printingAction.initLauncher();

        }else if(reportIndex == 2){//Production Steps                   
            ProductionProgram productionProgram = getUserData();
            printingAction = FinishedProductsReportDesc.getInstance().newPrintingAction();
            printingAction.setObjectToPrint(productionProgram);
            printingAction.initLauncher();
        }
    }

    @Override
    protected void shut(int reportIndex) {
        if(printingAction != null){
            printingAction.dispose();
        }
    }

    @Override
    protected String getReportFileName(int reportIndex) {
        String fileName = null;
        PrnContext prnContext = ReportFactory.getInstance().findContext("PRODUCTION_CONTEXT");
        if (prnContext != null) {
            PrnLayout prnLayout = null;
            if(reportIndex == 0) {
                prnLayout = prnContext.getLayoutByName("RAW_MATERIAL");
            }else if(reportIndex == 1) {
                prnLayout = prnContext.getLayoutByName("STEPS");
            }else if(reportIndex == 2) {
                prnLayout = prnContext.getLayoutByName("FINISHED_PRODUCTS");
            }
            if (prnLayout != null) {
                fileName = printingAction != null ? 
                printingAction.getLauncher().getReportFileName(prnLayout) : null;   
            }
        }
        return fileName;
    }

    @Override
    protected JRFocObjectParameters getParams(int reportIndex) {
        JRFocObjectParameters params = null;
        if(reportIndex == 0 || reportIndex == 1 || reportIndex == 2){
            //I am using the same header FocObject for all 3 reports
            ProductionProgram productionProgram = getUserData();
            params = new JRFocObjectParameters(productionProgram);  
        }
    }

    @Override
    protected JRFocListDataSource getDataSource(int reportIndex) {
        JRFocListDataSource source = null;
        if(reportIndex == 0){//Raw material
            ProductionProgram productionProgram = getUserData();
            source = new JRFocListDataSource(productionProgram.getRawMaterialFocList());
        }else if(reportIndex == 1){//Production Steps
            ProductionProgram productionProgram = getUserData();
            source = new JRFocListDataSource(productionProgram.getProductionStepsFocList());
        }else if(reportIndex == 2){//Production Steps
            ProductionProgram productionProgram = getUserData();
            source = new JRFocListDataSource(productionProgram.getFinishedGoodsFocList());                  
        }

        return source;
    }

    @Override
    protected boolean next(int reportIndex) {
        return reportIndex <= 2;//Because we have 3 printouts 1,2,3
    }
};