错误org.quartz.core.JobRunShell - 作业group1.JobReport抛出未处理的异常

Question

使用QUARTZ调度程序生成报告时出现奇怪的问题

我可以生成一份报告！没问题。

方法（reportsBean）正常工作，但是通过石英时会出现问题

有什么想法吗？我不知道该怎么做了：/

13449 [MyScheduler_Worker-1] ERROR org.quartz.core.JobRunShell - 作业group1.JobReport在com.changes的com.changes.bean.ReportsBean.createPdfCriticalChanges（ReportsBean.java:104）处抛出了一个未处理的异常：java.lang.NullPointerException orquart.quartz.core.JobRunShell.run（JobRunShell.java:202）中的.quartz.JobReport.execute（JobReport.java:36）org.quartz.simpl.SimpleThreadPool $ WorkerThread.run（SimpleThreadPool.java:573)13452 [MyScheduler_Worker-1] ERROR org.quartz.core.ErrorLogger - Job（group1.JobReport抛出异常.org.quartz.SchedulerException：Job在org.quartz处抛出了一个未处理的异常。[请参见嵌套异常：java.lang.NullPointerException] .core.JobRunShell.run（JobRunShell.java:213）at org.quartz.simpl.SimpleThreadPool $ WorkerThread.run（SimpleThreadPool.java:573）引起：com.changes.bean.ReportsBean.createPdfCriticalChanges的java.lang.NullPointerException （ReportsBean.java:104）位于org.quartz.core.JobRunShell.r的com.changes.quartz.JobReport.execute（JobReport.java:36）联合国（JobRunShell.java:202）

reportsbean

public class JobReport implements Job {


    public void execute(JobExecutionContext context) throws JobExecutionException {


        //BasicConfigurator.configure();
        try {
            ReportsBean reportsBean = new ReportsBean();
            reportsBean.createPdfCriticalChanges();
            SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy – hh:mm:ss");
            System.out.println("Rodou: " + dateFormat.format( new Date() ));
        } catch (JRException | SQLException e) {
            e.printStackTrace();
        }

    }

}

quartz.properties

org.quartz.scheduler.instanceName = MyScheduler
org.quartz.threadPool.threadCount = 3
org.quartz.jobStore.class = org.quartz.simpl.RAMJobStore
org.quartz.plugin.jobInitializer.class =org.quartz.plugins.xml.XMLSchedulingDataProcessorPlugin
org.quartz.plugin.jobInitializer.fileNames = com/changes/quartz/quartz-config.xml
org.quartz.plugin.jobInitializer.failOnFileNotFound = true

veb.hml

<!-- Inicio Quartz -->
<servlet>
    <servlet-name>QuartzServlet</servlet-name>
    <servlet-class>com.changes.quartz.servlet.QuartzServlet</servlet-class>
</servlet>
<servlet>
    <servlet-name>QuartzInitializer</servlet-name>
    <servlet-class>org.quartz.ee.servlet.QuartzInitializerServlet</servlet-class>
    <init-param>
        <param-name>config-file</param-name>
        <param-value>quartz.properties</param-value>
    </init-param>
    <init-param>
        <param-name>shutdown-on-unload</param-name>
        <param-value>true</param-value>
    </init-param>
    <init-param>
        <param-name>start-scheduler-on-load</param-name>
        <param-value>true</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
</servlet>
<!-- Fim Quartz -->

Answer 1

问题是您的ReportsBean中有NullPointerException。

由于Quartz执行方法的签名是

public void execute(JobExecutionContext context) throws JobExecutionException

Quartz只能处理将在此方法中抛出的JobExecutionException。但在您的情况下，它会出现意外的NullPointerException。

要解决此问题，您应该删除NullPointer的原因。从上面的源代码我无法弄清楚这个异常的原因，因为它发生在您的ReportsBean中。

当然，您的方法ReportsBean.createPdfCriticalChanges可以访问未初始化的成员。

Answer 2

在第104行：String report FacesContext.getCurrentInstance().getExternalContext().getRealPath("/web/reports/criticalcr.jrxml");

请记住：它的工作原理是石英。

ReportsBean

public void createPdfCriticalChanges() throws JRException,SQLException {
            System.out.println("generating report...");

            String report = FacesContext.getCurrentInstance().getExternalContext().getRealPath("/web/reports/criticalcr.jrxml");
            JasperReport pathjrxml = JasperCompileManager.compileReport(report);
            //JasperReport pathjrxml = JasperCompileManager.compileReport("web/reports/criticalcr.jrxml"); //Funciona com o inicia Agenda em XML "web/reports/changetracker_criticalcr.jrxml"
            JasperPrint printReport = JasperFillManager.fillReport(pathjrxml, null, conn.getConn());
            JasperExportManager.exportReportToPdfFile(printReport, "/web/reports/changetracker_criticalcr.pdf"); //Funciona com o inicia Agenda em XML "web/reports/criticalcr.pdf"
            System.out.println("report generated!");
    }

Answer 3

它不会抛出JobExecutionExceptionnb使用@postController和@override方法init