我试图将图像从PostgreSQL数据库加载到jaspersoft ireports(4.0),但我收到一个错误.
在PostgreSQL中,图像存储为bytea对象.在ireports中,我将图像字段的属性更改为java.io.InputStream.
将图像放入报表后,设置了以下属性:
表达式类:java.io.InputStream
图像表达式:image field
我也试过这个教程在ireport中显示blob图像.
显示以下错误:
Error filling print... Image read failed.
Setting up the file resolver...
net.sf.jasperreports.engine.JRException: Image read failed.
at net.sf.jasperreports.engine.util.JRJdk14ImageReader.readImage(JRJdk14ImageReader.java:73)
at net.sf.jasperreports.engine.util.JRImageLoader.loadImage(JRImageLoader.java:245)
at net.sf.jasperreports.engine.JRImageRenderer.getImage(JRImageRenderer.java:476)
at net.sf.jasperreports.engine.JRImageRenderer.getDimension(JRImageRenderer.java:512)
at net.sf.jasperreports.engine.fill.JRFillImage.fitImage(JRFillImage.java:1251)
at net.sf.jasperreports.engine.fill.JRFillImage.prepare(JRFillImage.java:1173)
at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:329)
at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:419)
at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:378)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2038)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:760)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:270)
at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:128)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:946)
at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:845)
at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:58)
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:417)
at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:247)
at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:877)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)
Print not filled. Try to use an EmptyDataSource...
我在R中使用Rgooglemaps包.
我想使用绘制点上的文本显示PlotOnStaticMap.还有一个命名TextOnStaticMap用于在指定坐标上绘制文本的函数.
但是在输出图中,要么打印文本,要么绘制点,但我需要两者.