java - 添加迄今为止的天数

Question

我通过这种方式向日期添加天数 "Add day" 这是标准程序， 但不幸的是，我的 Pentaho 应用程序在 c.setTime(dt); 上中断，我显然不知道原因，因为异常没有给出任何含义。
因此，另一种选择是解析日期并提取月、年和日，并对日 +1，但我必须处理 二月 和 奇数月。 我脑子里只有这两个选择。

有人可以指导我选择其他选项吗？

堆栈跟踪是

An unexpected error occurred in Spoon:  
(class: Processor, method: processRow signature: (Lorg/pentaho/di/trans/step/StepMetaInterface;Lorg/pentaho/di/trans/step/StepDataInterface;)Z) Register 11 contains wrong type
java.lang.VerifyError: (class: Processor, method: processRow signature: (Lorg/pentaho/di/trans/step/StepMetaInterface;Lorg/pentaho/di/trans/step/StepDataInterface;)Z) Register 11 contains wrong type
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
    at java.lang.Class.getMethod0(Unknown Source)
    at java.lang.Class.getMethod(Unknown Source)
    at org.pentaho.di.trans.steps.userdefinedjavaclass.UserDefinedJavaClassMeta.getStepIOMeta(UserDefinedJavaClassMeta.java:338)
    at org.pentaho.di.trans.TransPainter.drawLine(TransPainter.java:899)
    at org.pentaho.di.trans.TransPainter.drawHop(TransPainter.java:510)
    at org.pentaho.di.trans.TransPainter.drawHop(TransPainter.java:499)
    at org.pentaho.di.trans.TransPainter.drawTrans(TransPainter.java:184)
    at org.pentaho.di.trans.TransPainter.buildTransformationImage(TransPainter.java:144)
    at org.pentaho.di.ui.spoon.trans.TransGraph.getTransformationImage(TransGraph.java:2728)
    at org.pentaho.di.ui.spoon.trans.TransGraph.paintControl(TransGraph.java:2691)
    at org.pentaho.di.ui.spoon.trans.TransGraph$4.paintControl(TransGraph.java:487)
    at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
    at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
    at org.eclipse.swt.widgets.Composite.WM_PAINT(Unknown Source)
    at org.eclipse.swt.widgets.Control.windowProc(Unknown Source)
    at org.eclipse.swt.widgets.Canvas.windowProc(Unknown Source)
    at org.eclipse.swt.widgets.Display.windowProc(Unknown Source)
    at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
    at org.eclipse.swt.internal.win32.OS.DispatchMessage(Unknown Source)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
    at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1169)
    at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:6940)
    at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:553)
    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.pentaho.commons.launcher.Launcher.main(Launcher.java:134)

Answer 1

此外，如果您使用 Kettle/Pentaho 数据集成，则可以使用计算器步骤。提供的计算之一是“日期 A + B 天”。我经常使用它，而且它一直对我很有效。