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📜  JasperReports-导出报告

📅  最后修改于: 2020-11-16 07:51:12             🧑  作者: Mango

在上一章中，我们已经了解了如何打印和查看JasperReport生成的文档。在这里，我们将看到如何将这些报告转换或导出为其他格式，例如PDF，HTML和XLS。提供了外观类net.sf.jasperreports.engine.JasperExportManager来实现此功能。导出意味着将JasperPrint对象(.jrprint文件)转换为不同的格式。

以下代码(JasperReportExport.java)演示了JasperReport文档的导出过程。 JasperExportManager提供仅将报告导出为PDF，HTML和XML的方法。要导出为XLS格式，我们使用了类net.sf.jasperreports.engine.export.JRXlsExporter 。这段代码生成以下三个文件-

  • sample_report.pdf
  • sample_report.html
  • sample_report.xls

导出为其他格式

让我们编写一个报告模板。 JRXML文件的内容(C：\ tools \ jasperreports-5.0.1 \ test \ jasper_report_template.jrxml)如下-

接下来，POJO文件C：\ tools \ jasperreports-5.0.1 \ test \ src \ com \ tutorialspoint \ DataBean.java的内容如下-

package com.tutorialspoint;

public class DataBean {
   private String name;
   private String country;

   public String getName() {
      return name;
   }

   public void setName(String name) {
      this.name = name;
   }

   public String getCountry() {
      return country;
   }

   public void setCountry(String country) {
      this.country = country;
   }
}

文件C：\ tools \ jasperreports-5.0.1 \ test \ src \ com \ tutorialspoint \ DataBeanList.java的内容如下所示-

package com.tutorialspoint;

import java.util.ArrayList;

public class DataBeanList {
   public ArrayList getDataBeanList() {
      ArrayList dataBeanList = new ArrayList();

      dataBeanList.add(produce("Manisha", "India"));
      dataBeanList.add(produce("Dennis Ritchie", "USA"));
      dataBeanList.add(produce("V.Anand", "India"));
      dataBeanList.add(produce("Shrinath", "California"));

      return dataBeanList;
   }

   /**
    * This method returns a DataBean object,
    * with name and country set in it.
    */
   private DataBean produce(String name, String country) {
      DataBean dataBean = new DataBean();
      dataBean.setName(name);
      dataBean.setCountry(country);
      
      return dataBean;
   }
}

编写一个主类文件JasperReportFill.java ，该文件从类(DataBeanList)获取Java bean集合并将其传递给JasperReports引擎，以填充报告模板。将其保存到目录C：\ tools \ jasperreports-5.0.1 \ test \ src \ com \ tutorialspoint 。

package com.tutorialspoint;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRExporterParameter;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import net.sf.jasperreports.engine.export.JRXlsExporter;

public class JasperReportFill {
   @SuppressWarnings("unchecked")
   public static void main(String[] args) {
      String sourceFileName = "c://tools/jasperreports-5.0.1/"
         + "test/jasper_report_template.jasper";
      String printFileName = null;
      DataBeanList DataBeanList = new DataBeanList();
      ArrayList dataList = DataBeanList.getDataBeanList();
      JRBeanCollectionDataSource beanColDataSource =
         new JRBeanCollectionDataSource(dataList);

      Map parameters = new HashMap();
      try {
         printFileName = JasperFillManager.fillReportToFile(sourceFileName,
            parameters, beanColDataSource);
         if (printFileName != null) {
            /**
             * 1- export to PDF
             */
            JasperExportManager.exportReportToPdfFile(printFileName,
               "C://sample_report.pdf");

            /**
             * 2- export to HTML
             */
            JasperExportManager.exportReportToHtmlFile(printFileName,
               "C://sample_report.html");

            /**
             * 3- export to Excel sheet
             */
            JRXlsExporter exporter = new JRXlsExporter();

            exporter.setParameter(JRExporterParameter.INPUT_FILE_NAME,
               printFileName);
            exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME,
               "C://sample_report.xls");

            exporter.exportReport();
         }
      } catch (JRException e) {
         e.printStackTrace();
      }
   }
}

在这里，我们包含了将碧玉打印文件导出为pdf，html和xls格式的逻辑。

生成报告

让我们使用常规的ANT构建过程编译并执行上述文件。 build.xml文件如下所示-

转到命令提示符，然后转到目录build：xml放置在目录C：\ tools \ jasperreports-5.0.1 \ test中。最后，执行命令ant -Dmain-class = com.tutorialspoint.JasperReportFill 。输出如下-

C:\tools\jasperreports-5.0.1\test>ant -Dmain-class=com.tutorialspoint.JasperReportFill
Buildfile: C:\tools\jasperreports-5.0.1\test\build.xml

clean-sample:
   [delete] Deleting directory C:\tools\jasperreports-5.0.1\test\classes
   [delete] Deleting: C:\tools\jasperreports-5.0.1\test\jasper_report_template.jasper
   [delete] Deleting: C:\tools\jasperreports-5.0.1\test\jasper_report_template.jrprint

compile:
   [mkdir] Created dir: C:\tools\jasperreports-5.0.1\test\classes
   [javac] C:\tools\jasperreports-5.0.1\test\baseBuild.xml:28:
   warning: 'includeantruntime' was not set, defaulting t
   [javac] Compiling 4 source files to C:\tools\jasperreports-5.0.1\test\classes

compilereportdesing:
   [jrc] Compiling 1 report design files.
   [jrc] log4j:WARN No appenders could be found for logger
   (net.sf.jasperreports.engine.xml.JRXmlDigesterFactory).
   [jrc] log4j:WARN Please initialize the log4j system properly.
   [jrc] log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
   [jrc] File : C:\tools\jasperreports-5.0.1\test\jasper_report_template.jrxml ... OK.

run:
   [echo] Runnin class : com.tutorialspoint.JasperReportFill
   [java] log4j:WARN No appenders could be found for logger
   (net.sf.jasperreports.extensions.ExtensionsEnvironment).
   [java] log4j:WARN Please initialize the log4j system properly.

executereport:
   [echo] Im here

BUILD SUCCESSFUL
Total time: 32 seconds

作为上述执行的结果，您将在C：\目录中找到三个文件sample_report.pdf，sample_report.html，sample_report.xls。