如何将 Redis DB 值写入 excel sheet？
How to write the Redis DB values into excel sheet?
我正在使用 Redis 数据库管理器，客户端是 Jedis。
我已经使用 java
执行了以下两个查询
System.out.println("Alphabets:"+Jedis.smembers("SET Name");
System.out.println("Books:"+Jedis.hgetall("key","value");
输出如下，
1.First Print Statement output
Alphabets:[A,B,C,D,]
2.Second Print Statement output
Books : Cookbook=[Vishnu,JavaBook=Balaguru,Macbook=Steve]
这里我想把上面的输出值写成一个excelsheet格式如下
标题：字母列表
No Alphabets
- A
- B
- C
- D
Title : Books List
No. Book Name. BookAuthor
- Cookbook. Vishnu
- JavaBook. Balaguru
- MacBook Steve
字母是 Redis SET Command to get the SET values
中的值
Book Name 是键，BookAuthor 是 Redis Hash 中的值，用于第二个打印语句输出
我看过很多教程从数组中获取值并使用 Apache excel sheet 动态写入 poi.but 我得到的结果在这里看起来不像数组。
每次我在结果中得到更多的值，有没有办法动态写入 excel。
我的问题是如何将打印的输出值传递到 excel objects 并动态写入 excel
请帮我解决这个问题。
提前感谢您的帮助。
您可以使用 Apache POI 或 Jasper Reports 来完成。
Apache 兴趣点
package q46617008;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.StandardOpenOption;
import java.util.Iterator;
import java.util.Map.Entry;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ApacheExample
{
public void build( WorksheetExample w ) throws Exception
{
Workbook wb = new XSSFWorkbook( );
Sheet s = wb.createSheet( );
// If you need to name it:
// String name = WorkbookUtil.createSafeSheetName( "the name!" );
// Sheet s = wb.createSheet( name );
Row titleRow = s.createRow( 0 );
Cell titleCell = titleRow.createCell( 0 );
titleCell.setCellValue( "Alphabets List" );
Row r;
Cell c;
int i = 1;
Iterator< String > alphabetsIterator = WorksheetExample.alphabets.iterator( );
while ( alphabetsIterator.hasNext( ) )
{
String alphabet = alphabetsIterator.next( );
r = s.createRow( i );
c = r.createCell( 0 );
c.setCellValue( alphabet );
i++;
}
// Skip one line to start books list title.
// If you need this in another sheet, just create it:
// s = wb.createSheet();
i++;
titleRow = s.createRow( i );
titleCell = titleRow.createCell( 0 );
titleCell.setCellValue( "Books List" );
// Skip one line to start books list.
i++;
Iterator< Entry< String, String > > booksIterator = WorksheetExample.books.entrySet( ).iterator( );
while ( booksIterator.hasNext( ) )
{
Entry< String, String > book = booksIterator.next( );
r = s.createRow( i );
c = r.createCell( 0 );
c.setCellValue( book.getKey( ) + ". " + book.getValue( ) );
i++;
}
OutputStream fileOut = Files.newOutputStream( w.file, StandardOpenOption.CREATE );
wb.write( fileOut );
fileOut.close( );
wb.close( );
}
}
结果将类似于：
贾斯珀报道
您需要一份 Jasper 报告 JRXML 文件：
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.3.1.final using JasperReports Library version 6.3.1 -->
<!-- 2017-10-13T16:31:09 -->
<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" name="Worksheet" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="0c9a4a90-2d7f-4793-bf61-9f72221b82b4">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
<property name="net.sf.jasperreports.export.xls.white.page.background" value="false"/>
<property name="net.sf.jasperreports.export.xls.detect.cell.type" value="true"/>
<property name="net.sf.jasperreports.print.keep.full.text" value="true"/>
<style name="Table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="AlphabetsDataSet" uuid="725922ca-545f-4070-b9ed-5d9cd64508ff">
<queryString>
<![CDATA[]]>
</queryString>
<field name="_THIS" class="java.lang.String"/>
</subDataset>
<subDataset name="BooksDataSet" uuid="f06a8881-d9b9-42dc-90c3-ee1f748045e6">
<queryString>
<![CDATA[]]>
</queryString>
<field name="_THIS" class="java.util.Map.Entry"/>
</subDataset>
<parameter name="Alphabets" class="java.util.Set" nestedType="String">
<parameterDescription><![CDATA[]]></parameterDescription>
</parameter>
<parameter name="Books" class="java.util.Map"/>
<queryString>
<![CDATA[]]>
</queryString>
<detail>
<band height="120" splitType="Stretch">
<staticText>
<reportElement positionType="Float" x="0" y="0" width="555" height="20" uuid="6b9870c0-49f9-4540-ba5e-f131def81859"/>
<text><![CDATA[Alphabets List]]></text>
</staticText>
<staticText>
<reportElement positionType="Float" x="0" y="70" width="555" height="20" uuid="5d2a371c-4141-4728-afcf-6bdd326d4a40"/>
<text><![CDATA[Books List]]></text>
</staticText>
<componentElement>
<reportElement positionType="Float" x="0" y="20" width="555" height="30" uuid="5bca4983-9df0-4eee-8a5b-9cf3d5ef6965">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.table.style.table_header" value="Table_TH"/>
<property name="com.jaspersoft.studio.table.style.column_header" value="Table_CH"/>
<property name="com.jaspersoft.studio.table.style.detail" value="Table_TD"/>
</reportElement>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="AlphabetsDataSet" uuid="e998d7ad-a964-447e-b3e7-b7ebfd6ed06b">
<dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{Alphabets})]]></dataSourceExpression>
</datasetRun>
<jr:column width="120" uuid="739ad6b0-e886-4d7f-92d6-2cf0ef204ed6">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column1"/>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="120" height="30" uuid="c02e9247-104c-426b-b538-27c048d213ac"/>
<box padding="5"/>
<textFieldExpression><![CDATA[$F{_THIS}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
<componentElement>
<reportElement positionType="Float" x="0" y="90" width="555" height="30" uuid="1ecc6ba3-a20e-4978-aee9-4113907135c7">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.table.style.table_header" value="Table_TH"/>
<property name="com.jaspersoft.studio.table.style.column_header" value="Table_CH"/>
<property name="com.jaspersoft.studio.table.style.detail" value="Table_TD"/>
</reportElement>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="BooksDataSet" uuid="c09b4524-202e-436e-b6ba-74571e14c9af">
<dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{Books}.entrySet())]]></dataSourceExpression>
</datasetRun>
<jr:column width="120" uuid="397f69ae-2f85-44fd-85fc-bca177628dab">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column1"/>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="120" height="30" uuid="8d5fd0a8-7921-4871-8aa8-5360ac440f49"/>
<box padding="5"/>
<textFieldExpression><![CDATA[$F{_THIS}.getKey()+". "+$F{_THIS}.getValue()]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
</jasperReport>
对于此示例，将其保存为 Worksheet.jrxml 某处，但请记住路径，因为我们将在下一步中使用它。
对于 Java 实施：
package q46617008;
import java.nio.file.Files;
import java.nio.file.StandardOpenOption;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JREmptyDataSource;
import net.sf.jasperreports.engine.JRParameter;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.export.JRPdfExporter;
import net.sf.jasperreports.engine.export.ooxml.JRXlsxExporter;
import net.sf.jasperreports.export.SimpleExporterInput;
import net.sf.jasperreports.export.SimpleOutputStreamExporterOutput;
public class JasperExample
{
private Map< String, Object > parameters;
private String filePath = "C:\Path\To\Your\Worksheet.jrxml";
public JasperExample( ) {
parameters = new HashMap<>( );
// Define your locale or set it as a parameter
parameters.put( JRParameter.REPORT_LOCALE, new Locale( "pt", "BR" ) );
parameters.put( "Alphabets", WorksheetExample.alphabets );
parameters.put( "Books", WorksheetExample.books );
}
public void exportPDF( WorksheetExample w ) throws Exception
{
JRDataSource reportDataSource = new JREmptyDataSource( 1 );
JasperReport report = JasperCompileManager.compileReport( filePath );
JasperPrint jasperPrint = JasperFillManager.fillReport( report, parameters, reportDataSource );
JRPdfExporter exporter = new JRPdfExporter( );
exporter.setExporterInput( new SimpleExporterInput( jasperPrint ) );
exporter.setExporterOutput( new SimpleOutputStreamExporterOutput( Files.newOutputStream( w.file, StandardOpenOption.CREATE ) ) );
exporter.exportReport( );
}
public void exportXLSX( WorksheetExample w ) throws Exception
{
JRDataSource reportDataSource = new JREmptyDataSource( 1 );
JasperReport report = JasperCompileManager.compileReport( filePath );
JasperPrint jasperPrint = JasperFillManager.fillReport( report, parameters, reportDataSource );
JRXlsxExporter exporter = new JRXlsxExporter( );
exporter.setExporterInput( new SimpleExporterInput( jasperPrint ) );
exporter.setExporterOutput( new SimpleOutputStreamExporterOutput( Files.newOutputStream( w.file, StandardOpenOption.CREATE ) ) );
exporter.exportReport( );
}
}
结果将类似于：
在左侧，您会看到 XLSX 输出。右边是PDF版。
当然还有很多space可以优化。
例如，您可以保存编译后的 JRXML 并加载它，这比每次需要时都编译它要快得多。
运行它
如果你需要一个简单的 class 到 运行 这两个例子，使用这个：
package q46617008;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
public class WorksheetExample
{
public static final Set< String > alphabets = new HashSet<>( );
public static final Map< String, String > books = new HashMap<>( );
public final Path file;
public WorksheetExample( String fileName ) {
file = Paths.get( "C:", "Path", "To", "Your", fileName );
}
static
{
alphabets.add( "A" );
alphabets.add( "B" );
alphabets.add( "C" );
alphabets.add( "D" );
books.put( "Cookbook", "Vishnu" );
books.put( "JavaBook", "Balaguru" );
books.put( "MacBook", "Steve" );
}
public static void main( String[ ] args ) throws Exception
{
WorksheetExample w;
w = new WorksheetExample( "ApacheExample.xlsx" );
new ApacheExample( ).build( w );
w = new WorksheetExample( "JasperExample.xlsx" );
new JasperExample( ).exportXLSX( w );
w = new WorksheetExample( "JasperExample.pdf" );
new JasperExample( ).exportPDF( w );
}
}
我正在使用 Redis 数据库管理器，客户端是 Jedis。
我已经使用 java
执行了以下两个查询System.out.println("Alphabets:"+Jedis.smembers("SET Name");
System.out.println("Books:"+Jedis.hgetall("key","value");
输出如下，
1.First Print Statement output
Alphabets:[A,B,C,D,]
2.Second Print Statement output
Books : Cookbook=[Vishnu,JavaBook=Balaguru,Macbook=Steve]
这里我想把上面的输出值写成一个excelsheet格式如下
标题：字母列表
No Alphabets
- A
- B
- C
- D
Title : Books List
No. Book Name. BookAuthor
- Cookbook. Vishnu
- JavaBook. Balaguru
- MacBook Steve
字母是 Redis SET Command to get the SET values
中的值Book Name 是键，BookAuthor 是 Redis Hash 中的值，用于第二个打印语句输出
我看过很多教程从数组中获取值并使用 Apache excel sheet 动态写入 poi.but 我得到的结果在这里看起来不像数组。
每次我在结果中得到更多的值，有没有办法动态写入 excel。
我的问题是如何将打印的输出值传递到 excel objects 并动态写入 excel
请帮我解决这个问题。
提前感谢您的帮助。
您可以使用 Apache POI 或 Jasper Reports 来完成。
Apache 兴趣点
package q46617008;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.StandardOpenOption;
import java.util.Iterator;
import java.util.Map.Entry;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ApacheExample
{
public void build( WorksheetExample w ) throws Exception
{
Workbook wb = new XSSFWorkbook( );
Sheet s = wb.createSheet( );
// If you need to name it:
// String name = WorkbookUtil.createSafeSheetName( "the name!" );
// Sheet s = wb.createSheet( name );
Row titleRow = s.createRow( 0 );
Cell titleCell = titleRow.createCell( 0 );
titleCell.setCellValue( "Alphabets List" );
Row r;
Cell c;
int i = 1;
Iterator< String > alphabetsIterator = WorksheetExample.alphabets.iterator( );
while ( alphabetsIterator.hasNext( ) )
{
String alphabet = alphabetsIterator.next( );
r = s.createRow( i );
c = r.createCell( 0 );
c.setCellValue( alphabet );
i++;
}
// Skip one line to start books list title.
// If you need this in another sheet, just create it:
// s = wb.createSheet();
i++;
titleRow = s.createRow( i );
titleCell = titleRow.createCell( 0 );
titleCell.setCellValue( "Books List" );
// Skip one line to start books list.
i++;
Iterator< Entry< String, String > > booksIterator = WorksheetExample.books.entrySet( ).iterator( );
while ( booksIterator.hasNext( ) )
{
Entry< String, String > book = booksIterator.next( );
r = s.createRow( i );
c = r.createCell( 0 );
c.setCellValue( book.getKey( ) + ". " + book.getValue( ) );
i++;
}
OutputStream fileOut = Files.newOutputStream( w.file, StandardOpenOption.CREATE );
wb.write( fileOut );
fileOut.close( );
wb.close( );
}
}
结果将类似于：
贾斯珀报道
您需要一份 Jasper 报告 JRXML 文件：
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.3.1.final using JasperReports Library version 6.3.1 -->
<!-- 2017-10-13T16:31:09 -->
<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" name="Worksheet" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="0c9a4a90-2d7f-4793-bf61-9f72221b82b4">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
<property name="net.sf.jasperreports.export.xls.white.page.background" value="false"/>
<property name="net.sf.jasperreports.export.xls.detect.cell.type" value="true"/>
<property name="net.sf.jasperreports.print.keep.full.text" value="true"/>
<style name="Table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="AlphabetsDataSet" uuid="725922ca-545f-4070-b9ed-5d9cd64508ff">
<queryString>
<![CDATA[]]>
</queryString>
<field name="_THIS" class="java.lang.String"/>
</subDataset>
<subDataset name="BooksDataSet" uuid="f06a8881-d9b9-42dc-90c3-ee1f748045e6">
<queryString>
<![CDATA[]]>
</queryString>
<field name="_THIS" class="java.util.Map.Entry"/>
</subDataset>
<parameter name="Alphabets" class="java.util.Set" nestedType="String">
<parameterDescription><![CDATA[]]></parameterDescription>
</parameter>
<parameter name="Books" class="java.util.Map"/>
<queryString>
<![CDATA[]]>
</queryString>
<detail>
<band height="120" splitType="Stretch">
<staticText>
<reportElement positionType="Float" x="0" y="0" width="555" height="20" uuid="6b9870c0-49f9-4540-ba5e-f131def81859"/>
<text><![CDATA[Alphabets List]]></text>
</staticText>
<staticText>
<reportElement positionType="Float" x="0" y="70" width="555" height="20" uuid="5d2a371c-4141-4728-afcf-6bdd326d4a40"/>
<text><![CDATA[Books List]]></text>
</staticText>
<componentElement>
<reportElement positionType="Float" x="0" y="20" width="555" height="30" uuid="5bca4983-9df0-4eee-8a5b-9cf3d5ef6965">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.table.style.table_header" value="Table_TH"/>
<property name="com.jaspersoft.studio.table.style.column_header" value="Table_CH"/>
<property name="com.jaspersoft.studio.table.style.detail" value="Table_TD"/>
</reportElement>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="AlphabetsDataSet" uuid="e998d7ad-a964-447e-b3e7-b7ebfd6ed06b">
<dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{Alphabets})]]></dataSourceExpression>
</datasetRun>
<jr:column width="120" uuid="739ad6b0-e886-4d7f-92d6-2cf0ef204ed6">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column1"/>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="120" height="30" uuid="c02e9247-104c-426b-b538-27c048d213ac"/>
<box padding="5"/>
<textFieldExpression><![CDATA[$F{_THIS}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
<componentElement>
<reportElement positionType="Float" x="0" y="90" width="555" height="30" uuid="1ecc6ba3-a20e-4978-aee9-4113907135c7">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.table.style.table_header" value="Table_TH"/>
<property name="com.jaspersoft.studio.table.style.column_header" value="Table_CH"/>
<property name="com.jaspersoft.studio.table.style.detail" value="Table_TD"/>
</reportElement>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="BooksDataSet" uuid="c09b4524-202e-436e-b6ba-74571e14c9af">
<dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{Books}.entrySet())]]></dataSourceExpression>
</datasetRun>
<jr:column width="120" uuid="397f69ae-2f85-44fd-85fc-bca177628dab">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column1"/>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="120" height="30" uuid="8d5fd0a8-7921-4871-8aa8-5360ac440f49"/>
<box padding="5"/>
<textFieldExpression><![CDATA[$F{_THIS}.getKey()+". "+$F{_THIS}.getValue()]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
</jasperReport>
对于此示例，将其保存为 Worksheet.jrxml 某处，但请记住路径，因为我们将在下一步中使用它。
对于 Java 实施：
package q46617008;
import java.nio.file.Files;
import java.nio.file.StandardOpenOption;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import net.sf.jasperreports.engine.JRDataSource;
import net.sf.jasperreports.engine.JREmptyDataSource;
import net.sf.jasperreports.engine.JRParameter;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.export.JRPdfExporter;
import net.sf.jasperreports.engine.export.ooxml.JRXlsxExporter;
import net.sf.jasperreports.export.SimpleExporterInput;
import net.sf.jasperreports.export.SimpleOutputStreamExporterOutput;
public class JasperExample
{
private Map< String, Object > parameters;
private String filePath = "C:\Path\To\Your\Worksheet.jrxml";
public JasperExample( ) {
parameters = new HashMap<>( );
// Define your locale or set it as a parameter
parameters.put( JRParameter.REPORT_LOCALE, new Locale( "pt", "BR" ) );
parameters.put( "Alphabets", WorksheetExample.alphabets );
parameters.put( "Books", WorksheetExample.books );
}
public void exportPDF( WorksheetExample w ) throws Exception
{
JRDataSource reportDataSource = new JREmptyDataSource( 1 );
JasperReport report = JasperCompileManager.compileReport( filePath );
JasperPrint jasperPrint = JasperFillManager.fillReport( report, parameters, reportDataSource );
JRPdfExporter exporter = new JRPdfExporter( );
exporter.setExporterInput( new SimpleExporterInput( jasperPrint ) );
exporter.setExporterOutput( new SimpleOutputStreamExporterOutput( Files.newOutputStream( w.file, StandardOpenOption.CREATE ) ) );
exporter.exportReport( );
}
public void exportXLSX( WorksheetExample w ) throws Exception
{
JRDataSource reportDataSource = new JREmptyDataSource( 1 );
JasperReport report = JasperCompileManager.compileReport( filePath );
JasperPrint jasperPrint = JasperFillManager.fillReport( report, parameters, reportDataSource );
JRXlsxExporter exporter = new JRXlsxExporter( );
exporter.setExporterInput( new SimpleExporterInput( jasperPrint ) );
exporter.setExporterOutput( new SimpleOutputStreamExporterOutput( Files.newOutputStream( w.file, StandardOpenOption.CREATE ) ) );
exporter.exportReport( );
}
}
结果将类似于：
在左侧，您会看到 XLSX 输出。右边是PDF版。
当然还有很多space可以优化。
例如，您可以保存编译后的 JRXML 并加载它，这比每次需要时都编译它要快得多。
运行它
如果你需要一个简单的 class 到 运行 这两个例子，使用这个：
package q46617008;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
public class WorksheetExample
{
public static final Set< String > alphabets = new HashSet<>( );
public static final Map< String, String > books = new HashMap<>( );
public final Path file;
public WorksheetExample( String fileName ) {
file = Paths.get( "C:", "Path", "To", "Your", fileName );
}
static
{
alphabets.add( "A" );
alphabets.add( "B" );
alphabets.add( "C" );
alphabets.add( "D" );
books.put( "Cookbook", "Vishnu" );
books.put( "JavaBook", "Balaguru" );
books.put( "MacBook", "Steve" );
}
public static void main( String[ ] args ) throws Exception
{
WorksheetExample w;
w = new WorksheetExample( "ApacheExample.xlsx" );
new ApacheExample( ).build( w );
w = new WorksheetExample( "JasperExample.xlsx" );
new JasperExample( ).exportXLSX( w );
w = new WorksheetExample( "JasperExample.pdf" );
new JasperExample( ).exportPDF( w );
}
}