如何将Redis DB值写入Excel表格？

我正在使用Redis数据库pipe理器，客户端是Jedis。

我已经使用java执行了下面的两个查询

System.out.println("Alphabets:"+Jedis.smembers("SET Name"); System.out.println("Books:"+Jedis.hgetall("key","value"); 

输出结果如下，

1.首先打印语句输出

字母：[A，B，C，d，]

2.第二个打印语句输出

书籍：食谱= [Vishnu，JavaBook = Balaguru，Macbook =史蒂夫]

在这里我想用上面的格式将上面的输出值写入单个Excel表格

标题：字母表

没有字母

1. 一个
2. 乙
3. C
4. d

标题：书籍清单

没有书名。 BOOKAUTHOR

1. 食谱。 毗湿奴
2. JavaBook。 Balaguru
3. MacBook史蒂夫

Alphabets是Redis SET命令中的值， 用于获取SET值

Book Name是键，BookAuthor是Redis Hash for Second Print语句输出中的值

我看到很多教程从数组中获取值并dynamic地使用Apache poi写入Excel工作表。但是我得到的结果在这里看起来不像一个数组。

每次在结果中获得更多的价值，有没有办法dynamic地写入excel。

我的问题正是如何将打印的输出值传递到excel对象并dynamic地写入excel

请帮助我。

感谢您的帮助提前。

Answer 1

您可以使用Apache POI或Jasper Reports来完成。

Apache POI

 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( ); } } 

结果会是这样的：

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贾斯珀报告

你需要一个Jasper Report 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> 

对于这个例子，将它保存为Worksheet.jrxml某处，但请记住下一步我们将使用它的path。

对于Java实现：

 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( ); } } 

结果会是这样的：

在左边看到XLSX输出。 右边是PDF版本。

当然，还有很多优化的空间。
例如，您可以保存已编译的JRXML并加载它，这比每次需要编译时都快。

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运行它

如果你需要一个简单的类来运行这两个例子，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 ); } }