java JasperReports 类路径
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JasperReports class path
提问by Débora
I want to include the .jrxmlfile in my NetBeansswing project. I use NetBeans 7.0.1. I created a package inside source package called "rep" and created a simple .jrxmlfile called "rp.jrxml". I have installed the iReportplugin in NetBeans. When I set a outer .jrxmlfile, it is showed ("D:/MyReports/firstreport.jrxml") but when I set the NetBeanspackage path, it was not shown. Here is my code.
我想在我的NetBeans摆动项目中包含.jrxml文件。我使用NetBeans 7.0.1。我在源包中创建了一个名为“rep”的包，并创建了一个名为“rp.jrxml”的简单.jrxml文件。我已经在NetBeans 中安装了iReport插件。当我设置外部.jrxml文件时，它会显示（“D:/MyReports/firstreport.jrxml”）但是当我设置NetBeans包路径时，它没有显示。这是我的代码。
try {
String reportSource="/rep/rp.jrxml"; //and also "rep/rp.jrxml" is used.no result.
Map<String, Object> params = new HashMap<String, Object>();
JasperReport jasperReport = JasperCompileManager.compileReport(reportSource);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, new JREmptyDataSource());
JasperViewer.viewReport(jasperPrint, false);
} catch (Exception e) {e.printStackTrace();
}
Then the following error is given;
然后给出以下错误；
net.sf.jasperreports.engine.JRException: java.io.FileNotFoundException: rep\rp.jrxml (The system cannot find the path specified)
How I can keep jrxmlfiles inside my NetBeansproject and use jrxmlfiles inside the project?
如何将jrxml文件保存在NetBeans项目中并在项目中使用jrxml文件？
回答by Alex K
This code works for me:
这段代码对我有用：
public class TestJasper {
public static void main(String[] args) {
try {
String reportSource = "resources/report1.jrxml";
Map<String, Object> params = new HashMap<String, Object>();
JasperReport jasperReport = JasperCompileManager.compileReport(reportSource);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, new JREmptyDataSource());
JasperViewer.viewReport(jasperPrint, false);
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
}
My project structure:
我的项目结构：
build
classes
TestJasper.class
dist
nbproject
resources
report1.jrxml
src
TestJasper.java
UPDATED:
For solving net.sf.jasperreports.engine.JRException: No report compiler set for language : nullproblem you can try to set groovyreport language and add groovy-all-jdk14library to classpath.
You can get groovy library here.
更新：
为了解决net.sf.jasperreports.engine.JRException: No report compiler set for language : null问题，您可以尝试设置groovy报告语言并将groovy-all-jdk14库添加到类路径。
你可以在这里获得 groovy 库。
The sample of report header with language set to groovy:
语言设置为 的报告标题示例groovy：
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd"
...
language="groovy"
...>
回答by Débora
Here the solution.It is better to provide an absolute path in the jar file itself.Also when the jar is run,using *.jasper file is better to use instead of .jrxml it may cause for the speed of generating the report as well.Then that .jasper can be sent to JasperFillManager as a inputstream. That is it.
这里的解决方案。最好在jar文件中提供一个绝对路径。另外在运行jar时，最好使用*.jasper文件而不是.jrxml，这也可能导致生成报告的速度.然后可以将 .jasper 作为输入流发送到 JasperFillManager。这就对了。
