如何从jar文件中加载已编译的jasper报告，而不是通过硬盘上的特定路径加载？
我的报告在我的机器上工作正常，因为我已经设置了报告的路径：
jasperReport1 = (JasperReport) JRLoader.loadObjectFromFile("/Users/admin/Documents/HCCE/Semester 2/OOP/Projects2/TestApp/src/ie/test/OMACYTDReportFinalpg1.jasper");
jasperReport2 =(JasperReport) JRLoader.loadObjectFromFile("/Users/admin/Documents/HCCE/Semester 2/OOP/Projects2/TestApp/src/ie/test/OMACYTDReportFinalpg2.jasper");
但是当在另一台计算机上使用完成的jar工作时，报告没有加载。所以我试图使用输入流并将其传递给JasperFillManager，但没有任何工作 - InputStream没有找到文件。我的路径错了吗？
InputStream jasper1 = getClass().getResourceAsStream("src/ie/test/OMACYTDReportFinalpg1.jasper");
InputStream jasper2 = getClass().getResourceAsStream("src/ie/test/OMACYTDReportFinalpg2.jasper");
我原来的工作代码：
private void yTDReportBtnActionPerformed(java.awt.event.ActionEvent evt) {
try
{
JasperReport jasperReport1 = null;
JasperReport jasperReport2 = null;
JasperPrint jasperPrint = null;
JasperDesign jasperDesign = null;
Map parameters = new HashMap();
SimpleDateFormat formatter = new SimpleDateFormat("dd-mmm-yyyy");
String today = formatter.format(new java.util.Date());
//load just the compiled jasper files, to save time
//First merge the two jasper reports into one to get page1 and page 2 in same document
jasperReport1 = (JasperReport) JRLoader.loadObjectFromFile("/Users/admin/Documents/HCCE/Semester 2/OOP/Projects2/TestApp/src/ie/test/OMACYTDReportFinalpg1.jasper");
jasperReport2 =(JasperReport) JRLoader.loadObjectFromFile("/Users/admin/Documents/HCCE/Semester 2/OOP/Projects2/TestApp/src/ie/test/OMACYTDReportFinalpg2.jasper");
JasperPrint jp1 = JasperFillManager.fillReport(jasperReport1, parameters,new JRBeanCollectionDataSource(ie.test.BeanFactory.getCalcs()));
JasperPrint jp2 = JasperFillManager.fillReport(jasperReport2, parameters, new JRBeanCollectionDataSource(ie.test.BeanFactory.getCalcs()));
List pages = jp2 .getPages();
for (int j = 0; j < pages.size(); j++) {
JRPrintPage object = (JRPrintPage)pages.get(j);
jp1.addPage(object);
jp1.setName(unitNameLbl.getText() + " - Financial Year To Date - " + today );
}
JasperViewer.viewReport(jp1, false);
}
catch(Exception ex)
{
System.out.println("EXCEPTION: "+ex.getMessage() + ex);
}
}
现在更改的代码无效：
private void yTDReportBtnActionPerformed(java.awt.event.ActionEvent evt) {
try
{
JasperReport jasperReport1 = null;
JasperReport jasperReport2 = null;
JasperPrint jasperPrint = null;
JasperDesign jasperDesign = null;
Map parameters = new HashMap();
SimpleDateFormat formatter = new SimpleDateFormat("dd-mmm-yyyy");
String today = formatter.format(new java.util.Date());
//load just the compiled jasper files, to save time
//First merge the two jasper reports into one to get page1 and page 2 in same document
InputStream jasper1 = getClass().getResourceAsStream("src/ie/test/OMACYTDReportFinalpg1.jasper");
InputStream jasper2 = getClass().getResourceAsStream("src/ie/test/OMACYTDReportFinalpg2.jasper");
JasperPrint jp1 = JasperFillManager.fillReport(jasper1, parameters,new JRBeanCollectionDataSource(ie.test.BeanFactory.getCalcs()));
JasperPrint jp2 = JasperFillManager.fillReport(jasper2, parameters, new JRBeanCollectionDataSource(ie.test.BeanFactory.getCalcs()));
List pages = jp2 .getPages();
for (int j = 0; j < pages.size(); j++) {
JRPrintPage object = (JRPrintPage)pages.get(j);
jp1.addPage(object);
jp1.setName(unitNameLbl.getText() + " - Financial Year To Date - " + today );
}
JasperViewer.viewReport(jp1, false);
}
catch(Exception ex)
{
System.out.println("EXCEPTION: "+ex.getMessage() + ex);
}
}
任何帮助非常感谢！
Ok update：我通过创建一个名为“reports”并使用
的新包来使InputStreams正常工作InputStream jasper1 = getClass().getResourceAsStream("/reports/OMACYTDReportFinalpg1.jasper");
InputStream jasper2 = getClass().getResourceAsStream("/reports/OMACYTDReportFinalpg2.jasper");
这在Netbeans中工作得很好但是当我编译成jar时它仍然不会加载文件!!
任何想法我做错了什么？
答案 0 :(得分：1)
InputStream jasper1 = getClass().getResourceAsStream("src/ie/test/OMACYTDReportFinalpg1.jasper");
InputStream jasper2 = getClass().getResourceAsStream("src/ie/test/OMACYTDReportFinalpg2.jasper");
答案 1 :(得分：0)
旧主题，但可能有用。 我的jar里面没有 src 文件夹。
InputStream jasper2 = getClass().getResourceAsStream("/ie/test/OMACYTDReportFinalpg2.jasper");
哪里有更高级的方式： 将您的碧玉报告，图像和其他资源放入jar中。
将 YourClass 放在jar文件中并使用class.getResourceAsStream（）加载资源，并且需要在加载资源之前添加加载器扩展
(JasperReport) JRLoader.loadObject("stream or path");
// DefaultJasperReportsContext user ExtensionsEnvironment
ExtensionsEnvironment.setThreadExtensionsRegistry(LoaderExtention.INSTANCE);
以下加载资源的示例
public class LoaderService
implements RepositoryService
{
public static final RepositoryService INSTANCE = new LoaderService();
@Override
public void setContext(RepositoryContext repositoryContext)
{
}
@Override
public void revertContext()
{
}
@Override
public InputStream getInputStream(String file)
{
LOGGER.fine(String.format("getInputStream('%s')", file));
return <YourClass>.class.getResourceAsStream(file);
}
@Override
public Resource getResource(String file)
{
LOGGER.fine(String.format("getResource('%s') not implemented", file));
return null;
}
@Override
public <K extends Resource> K getResource(String file, Class<K> cls)
{
LOGGER.fine(String.format("getResource('%s', %s)", file, cls != null? cls.getName(): null));
try
{
if (cls == ReportResource.class)
{
InputStream resource = getInputStream(file);
if (resource != null)
{
JasperReport report = (JasperReport) JRLoader.loadObject(resource);
if (report != null)
{
ReportResource res = new ReportResource();
res.setName(file);
res.setReport(report);
return (K) res;
}
}
}
else if (cls == InputStreamResource.class)
{
InputStream resource = getInputStream(file);
if (resource != null)
{
InputStreamResource res = new InputStreamResource();
res.setInputStream(resource);
return (K) res;
}
}
}
catch (JRException e)
{
}
return null;
}
@Override
public void saveResource(String string, Resource resource)
{
// TODO Implement this method
}
}
public class LoaderExtention
implements ExtensionsRegistry
{
public static final LoaderExtention INSTANCE = new LoaderExtention();
@Override
public <T extends Object> List<T> getExtensions(Class<T> cls)
{
ExtensionsRegistry system = ExtensionsEnvironment.getSystemExtensionsRegistry();
List<T> services = null;
if (system != null)
services = system.getExtensions(cls);
if (cls == RepositoryService.class)
{
List<T> servicesAll = new ArrayList<T>();
if (services != null)
servicesAll.addAll(services);
servicesAll.add((T) LoaderService.INSTANCE); // Try to use system resource loaders then my
services = servicesAll;
}
LOGGER.fine(String.format("getExtensions(%s) = %s", cls.getName(), services));
return services;
}
}
我使用JasperReport 5.5 玩得开心。
答案 2 :(得分：0)
你应该把jasper报告放在
中<强> yourapp / SRC /主/资源/报告
然后从类java
调用该报告JasperReport jp = JasperCompileManager.compileReport(getClass().getResourceAsStream("/reports/yourReport.jrxml"));
见到你！