Question

我正在尝试使用this well-known plugin及其文档中的示例从报告中获取CSV，但它会引发异常。我想知道为什么，因为我刚从文档中复制了大部分代码。

我的代码是：

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.logging.Level;
import org.eclipse.birt.core.exception.BirtException;
import org.eclipse.birt.core.framework.Platform;
import org.eclipse.birt.report.engine.api.EngineConfig;
import org.eclipse.birt.report.engine.emitter.csv.CSVRenderOption;
import org.eclipse.birt.report.engine.api.IReportEngine;
import org.eclipse.birt.report.engine.api.IReportEngineFactory;
import org.eclipse.birt.report.engine.api.IReportRunnable;
import org.eclipse.birt.report.engine.api.IRunAndRenderTask;

public class RunReport {

    static void runReport() throws FileNotFoundException, BirtException {
        String resourcePath = "C:\\Users\\hpsa\\workspace\\My Reports\\";
        FileInputStream fs = new FileInputStream(resourcePath + "new_report_1.rptdesign");
        IReportEngine engine = null;
        EngineConfig config = new EngineConfig();
        config.setEngineHome("C:\\birtre\\birt-runtime-4_3_2\\");
        config.setLogConfig("C:\\birtre\\", Level.FINE);
        config.setResourcePath(resourcePath);
        Platform.startup(config);
        IReportEngineFactory factory = (IReportEngineFactory) Platform.createFactoryObject(IReportEngineFactory.EXTENSION_REPORT_ENGINE_FACTORY);
        engine = factory.createReportEngine(config);
        engine.changeLogLevel(Level.FINE);
        IReportRunnable design = engine.openReportDesign(fs);
        IRunAndRenderTask task = engine.createRunAndRenderTask(design);
        CSVRenderOption csvOption = new CSVRenderOption();
        String format = CSVRenderOption.OUTPUT_FORMAT_CSV;
        csvOption.setOutputFormat(format);
        csvOption.setOutputFileName("newBIRTcsv.csv");
        csvOption.setShowDatatypeInSecondRow(true);
        csvOption.setExportTableByName("SecondTable");
        csvOption.setDelimiter("\t");
        csvOption.setReplaceDelimiterInsideTextWith("-");
        task.setRenderOption(csvOption); 
        task.setEmitterID("org.eclipse.birt.report.engine.emitter.csv");
        task.run();
        task.close();
        Platform.shutdown();
        System.out.println("Report Generated Sucessfully!!");   
    }

    public static void main(String[] args) {
        try {
            runReport();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }  
}

我得到了例外：

    Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/core/runtime/CoreException
    at org.eclipse.birt.core.framework.Platform.createPlatformLauncher(Platform.java:115)
    at org.eclipse.birt.core.framework.Platform.startup(Platform.java:74)
    at com.demshin.birttest.RunReport.runReport(RunReport.java:26)
    at com.demshin.birttest.RunReport.main(RunReport.java:55)
Caused by: java.lang.ClassNotFoundException: org.eclipse.core.runtime.CoreException
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    ... 4 more

我找到了包org.eclipse.core.runtime并在构建路径中注册，但后来我得到了同样的异常。实际上，org.eclipse.core.runtime包中没有任何CoreException.class。我做错了什么？

Answer 1

不推荐将引擎设置为主页，并且大多数时候它会阻止平台启动，例如在您的情况下。删除这一行：

config.setEngineHome("C:\\birtre\\birt-runtime-4_3_2\\");

您只需确保birt运行时4.3.2位于上下文的类路径中。此外，我建议您首先尝试生成本地格式，如pdf，然后尝试使用csv格式。

Answer 2

我尝试了很多导入不同罐子的变种，但最后我发现了一个奇怪的决定here：

转到Project Explorer，右键单击属性项目，转到Java Build path，单击External Jars按钮，然后选择下面的所有库 C：\ birt_runtime \ birt-runtime-2_1_0 \ ReportEngine \ lib \ folder

这使得混乱，但至少它开始了。

BIRT csv发射器插件错误 -

2 个答案: