Develop Reference

How to display Vietnamese in PDF what exported by Jasper report correctly?

I am using these dependencies
implementation ('net.sf.jasperreports:jasperreports:6.9.0')
implementation ('net.sf.jasperreports:jasperreports-fonts:6.9.0')
implementation ('net.sf.jasperreports:jasperreports-functions:6.9.0')
implementation ('net.sf.jasperreports:jasperreports-metadata:6.9.0')
implementation ('net.sf.jasperreports:jasperreports-fonts:6.9.0')
implementation ('net.sf.jasperreports:jasperreports-annotation-processors:6.9.0')
implementation ('net.sf.jasperreports:jasperreports-chart-themes:6.9.0')
implementation ('net.sf.jasperreports:jasperreports-chart-customizers:6.9.0')
implementation ('net.sf.jasperreports:jasperreports-custom-visualization:6.9.0')
compile 'com.lowagie:itext:2.1.7.js5'
with Jasper report for Eclipse 2019.6 . Vietnamese character display in error
Java code
#RequestMapping(value = "/ca_audit/minute_pdf", method = RequestMethod.GET)
public void generatePDFCashAuditMinute() throws JRException {
JasperReport jasperReport = JasperCompileManager.compileReport("D:/vy/template.jrxml");
Map<String, Object> parameters = new HashMap<>();
parameters.put("p1", "Example joint stock company"); // Tên tổ chức
parameters.put("p2", "EXKK002"); // Số biên bản
parameters.put("p3", 26); // Ngày
JRDataSource jrDataSource = new JREmptyDataSource();
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, jrDataSource);
JasperExportManager.exportReportToPdfFile(jasperPrint, "D:/foo/out.pdf");
}
The content of file *.jrxml
<?xml version="1.0" encoding="UTF-8"?>
<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="bien_ban_kiem_ke_quy_a4" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="7098c966-5c92-43e3-a729-b3d486fc858b">
<parameter name="p1" class="java.lang.String"/>
<parameter name="p2" class="java.lang.String"/>
<parameter name="p3" class="java.lang.Integer"/>
<queryString>
<![CDATA[select 1 as id]]>
</queryString>
<field name="id" class="java.lang.Integer"/>
<title>
<band height="84" splitType="Stretch">
<textField>
<reportElement x="14" y="6" width="100" height="30" uuid="2106c35d-3d5e-4203-950a-54a87b6952ea"/>
<textElement>
<font fontName="Arial"/>
</textElement>
<textFieldExpression><![CDATA[$P{p1}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="376" y="23" width="64" height="16" uuid="77d41a67-82d2-46d0-9a3e-5327ae3b450b"/>
<text><![CDATA[Số biên bản:]]></text>
</staticText>
<textField>
<reportElement x="440" y="23" width="50" height="16" uuid="a505da46-48af-4dcb-84bc-f9d27697919d"/>
<textFieldExpression><![CDATA[$P{p2}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="260" y="47" width="34" height="13" uuid="541c25ed-4b29-4cc4-a19d-05f295ae0340"/>
<text><![CDATA[ngày]]></text>
</staticText>
<textField>
<reportElement x="290" y="47" width="40" height="13" uuid="72e64426-d702-4694-bc25-81a2f3e43f82"/>
<textFieldExpression><![CDATA[$P{p3}]]></textFieldExpression>
</textField>
</band>
</title>
</jasperReport>
I create file jasperreports.properties in classpath
In Eclipse IDE (with Jaspersoft module)
How to fix it?

It's a font issue. Not a PDF encoding problem. Maybe try to use Arial Unicode MS
Inside your tag add the following
<font fontName="Arial Unicode MS" size="11" pdfFontName="Arial Unicode MS" pdfEncoding="Identity-H"/>
Also make sure that Arial font extension jar in class path. Search internet for arial font extension jar.

Try this:
Do not set a PDF Font Name for the font family that you created with the Arial ttf. You don't want to use Helvetica because it doesn't include glyphs for Vietnamese characters. Leave it empty so that the Arial ttf is used in PDF.
Set the PDF Encoding for the font family to Identity-H (Vietnamese uses horizontal writing).
The screenshot shows that the font family is called "times", so you'll have to use <font fontName="times"/> for the text element.
This will result in the Arial ttf being embedded in the PDF file (a subset of it actually) and used for the text. Therefore the PDF would show the Vietnamese characters, as long as the Arial ttf includes glyphs for them (and my Arial ttf copy does).
If for some reason you don't want to embed Arial in the PDF file, you can also use the DejaVu fonts included in net.sf.jasperreports:jasperreports-fonts:6.9.0, for instance <font fontName="DejaVu Sans"/>
You might also want to set the net.sf.jasperreports.default.pdf.encoding property to Identity-H, if you generally want to embed fonts in PDFs, or just leave it unset and specify the PDF encoding for each font family.

File jasperreports.properties
net.sf.jasperreports.default.pdf.encoding=UTF-8
net.sf.jasperreports.export.character.encoding=UTF-8
https://community.jaspersoft.com/wiki/custom-font-font-extension
https://freefontsdownload.net/download/36926/arial-unicode-ms.zip
https://learn.microsoft.com/vi-vn/typography/font-list/arial-unicode-ms
What is the purpose of the 'Pdf embedded' option of the Static Text element in iReport 5.6.0?

Exporting to Excel with JasperReports: How to add AutoFilter for columns

I am using this code for create report in MS Excel format:
JRXlsExporter exporter = new JRXlsExporter();
From there I don't know if it's possible to tell JasperReports to apply an auto filter on each column.

I was facing the same issue i.e in my spreadsheet(.xls) I wanted to add auto filter to all the columns(15), so I have added one property(Properties expression )name = net.sf.jasperreports.export.xls.auto.filter and value as 'Start' at first column header and same property with value as End at last column header and it worked.

Go to the 'Exporter Parameters' pane and make sure none of the 'Start' or 'Stop' options are set for Auto Filter. Choose the empty space in the related list box (see the attached image). Then run the report again. This time you should see the filters in the right places.
http://community.jaspersoft.com/jaspersoft-studio/issues/6876

JasperReports engine can is able to apply autofilters for columns for MS Excel output format. For applying autofilters we have to use net.sf.jasperreports.export.xls.auto.filter property. We should apply this property for header cells. It is possible to set filter for only one column or for the several columns.
Working example
Datasource
I used the csv datasource in this sample:
language,framework
Java,Guava
Java,Lombok
Java,JasperReports
Java,Spring
Java,Vaadin
C#,ASP.NET MVC
C#,NancyFX
C#,Automapper
JavaScript,AngularJS
JavaScript,React
JavaScript,jQuery
The name of data adapter for this datasource in the example below is frameworks.csv
The report's template
I used Jaspersoft Studio (JSS) for designing a report template.
<?xml version="1.0" encoding="UTF-8"?>
<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="excel_filter" pageWidth="595" pageHeight="842" columnWidth="595" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="b521f87a-96ed-43bd-80bd-c7b81ef2e8aa">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="frameworks.csv"/>
<queryString>
<![CDATA[]]>
</queryString>
<field name="language" class="java.lang.String"/>
<field name="framework" class="java.lang.String"/>
<columnHeader>
<band height="30" splitType="Stretch">
<staticText>
<reportElement x="0" y="0" width="278" height="30" uuid="6b8ba60b-3df3-4c78-a780-79ee493ca5f8">
<property name="net.sf.jasperreports.export.xls.auto.filter" value="Start"/>
</reportElement>
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[Language]]></text>
</staticText>
<staticText>
<reportElement x="278" y="0" width="277" height="30" uuid="731ba580-2168-49f6-b844-d02549d3d83c">
<property name="net.sf.jasperreports.export.xls.auto.filter" value="End"/>
</reportElement>
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[Framework]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="30" splitType="Stretch">
<textField>
<reportElement x="0" y="0" width="278" height="30" uuid="7bf9acec-b13a-4261-91c1-0bf6f2c9c784"/>
<textFieldExpression><![CDATA[$F{language}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="278" y="0" width="277" height="30" uuid="d15bd48e-77ee-43df-b11f-4ec1a65811c0"/>
<textFieldExpression><![CDATA[$F{framework}]]></textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>
I've used the Detail band for showing data. For the first column I set the Start value to the net.sf.jasperreports.export.xls.auto.filter property for staticText in Column Header band (will be the column header in Excel file) and the End value for the second (last) column.
In case using of setting property for only one column the only one filter will be created.
We can easy set property with help of context menu "XLS Tags -> Autofilter -> Start (End)" in JSS.
Output result
The generated output file in MS Excel format contains autofilters for both columns. The file was generated with help of JSS.
Notes:
More information about applying different features for exported Excel files can be found on vendor site

JasperReport Components

New to JasperReports and attempting to either: (a) manually write a JRXML or (b) manually program a JasperDesign myself (not using a template). My understanding is that both the XML and the Java object represent the same concept: an empty "shell" of a report without any data in it.
I'm trying to figure out what JR components would be suit my needs, and the reference, the samples as well as many online searches haven't turned back anything that is clear-cut. Most JR documentation seems, at least to a newbie, to be written from an "assumed knowledge" standpoint.
What is the difference between, and appropriate usages for, the following "components" (not really sure what else to call them):
Text
TextField
TextElement
StaticText
This images example here shows most of these elements being used, seemingly willy-nilly in a not-so-obvious format.
The root of my question is that I wish to display two types of text-based information; one I am referring to as "fields" (not to be confused with JR fields) and the other I am calling "text blocks" consisting of a header and a body. I would like these fields/text blocks rendered as follows:
"Field":
Name: John Smith
Age: 42
Summary: This is an example of a field
And a "text block":
Name:
John Smith
Age:
42
Summary:
This is an example of a text block. "Summary:" is the head, and this is the body.
Same information, just presented differently. I believe that one/several of the JR components listed above are the one's I need to use, but I can't seem to find any documentation that confirms/rejects that.
Anybody have any ideas on this? Thanks in advance!

You're right in that the .jrxml and the JasperDesign object are analogous and represent an empty report design. This design can then be compiled into a .jasper file or JasperReport object, which is then filled with data to produce an actual report.
Out of the four "components" you listed, only TextField and StaticText are really report components. The others simply hold properties of a parent element.
StaticText holds text that never changes. It is set in the design and that's it.
A TextField has an expression that is executed when the report is filled. These are the elements you will you to put data into your report.
Text is a tag that holds the actual text content of a StaticText element. This is the only place it will appear.
TextElement declares properties that are specific to how the report should render text. Every TextField or StaticText can include this tag. Properties include text alignment, rotation, typeface, font size, etc.
To solve your problem, you will need to use StaticText components for the name, age and summary labels, as they will always be the same; and TextField components for the actual report data.
As others have suggested, I would recommend iReport. I would do most of the design using it, then make and changes to the JRXML by hand (The xml it produces is a bit bloated). The designer will hide Text and TextElement from you and it will appear as though the properties are being set on the text components themselves. This isn't a problem, but if you're going to change the JRXML by hand you should be aware of it so you don't add attributes to the wrong tags. Looking at the output of iReport is also a good way to learn valid JRXML, as the error messages you get for an incorrect .jrxml file are not always helpful.
Hope that helps!

If you don't want to use iReport you can try to build reports dynamically with help of DynamicJasper Java API or JasperReports Java API.
My advice to you: do not try to reinvent the wheel. Try to use iReport designer, it is a really helpful tool for building both easy and complex reports.
Just one cross of using iReport: the JasperServer application (ready for use web application for deploying, building reports and exporting data to different formats) works with jrxml templates.
The iReport Ultimate Guide and JasperReports Ultimate Guide are very valuable books. You can find some manuals here.
This is the snippet of jrxml template relevant to your question (I hope). It was written with iReport.
<detail>
<band height="60" splitType="Stretch">
<staticText>
<reportElement x="0" y="0" width="63" height="20"/>
<box leftPadding="10">
<topPen lineWidth="1.0"/>
<leftPen lineWidth="1.0"/>
</box>
<textElement/>
<text><![CDATA[Name:]]></text>
</staticText>
<staticText>
<reportElement x="0" y="20" width="63" height="20"/>
<box leftPadding="10">
<leftPen lineWidth="1.0"/>
</box>
<textElement/>
<text><![CDATA[Age:]]></text>
</staticText>
<staticText>
<reportElement x="0" y="40" width="63" height="20"/>
<box leftPadding="10">
<leftPen lineWidth="1.0"/>
<bottomPen lineWidth="1.0"/>
</box>
<textElement/>
<text><![CDATA[Summary:]]></text>
</staticText>
<textField>
<reportElement x="63" y="0" width="290" height="20"/>
<box leftPadding="10">
<topPen lineWidth="1.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$F{Name}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="63" y="20" width="290" height="20"/>
<box leftPadding="10">
<pen lineWidth="1.0"/>
<topPen lineWidth="0.0"/>
<leftPen lineWidth="0.0"/>
<bottomPen lineWidth="0.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$F{Age}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="63" y="40" width="290" height="20"/>
<box leftPadding="10">
<bottomPen lineWidth="1.0"/>
<rightPen lineWidth="1.0"/>
</box>
<textElement/>
<textFieldExpression><![CDATA[$F{Summary}]]></textFieldExpression>
</textField>
</band>
</detail>
The result will be:
It takes me just 5 minutes.

Abort Jasper report generation on NullPointerException

I'm creating reports with Jasper Reports (4.0.0) for our project (JRE 1.6.x).
I'm getting bothered with NullPointerExceptions in my scriptlets, as they do not cause the report to abort, they just make the field be silently evaluated to null. As far as I tested, it happens only to NPE's.
The generated reports are quite important and should not have any errors. So, if an exception occurs (like NPE's for some missing data), it should stop the generation, and the database and/or report should be fixed. Such behavior may hide some report coding errors, unless someone spots the missing field.
What is the reason for this behavior with NPE's? Is there any compilation option or execution flag I can switch to make NPE's bubble up as other exceptions do?
I really wish I won't have to wrap every scriptlet method in a try..catch block and throw another exception on NPE's.
Thanks!
Ok, a sample report. It does not uses scriptlets, but generate the NPE directly on a field evaluation (the result is the same), and can be executed directly on iReport preview without parameters:
<?xml version="1.0" encoding="UTF-8"?>
<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="NPE_Report" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<variable name="NullVariable" class="java.lang.Integer" calculation="System">
<initialValueExpression><![CDATA[null]]></initialValueExpression>
</variable>
<variable name="NotNullVariable" class="java.lang.Integer" calculation="System">
<initialValueExpression><![CDATA[200]]></initialValueExpression>
</variable>
<title>
<band height="72" splitType="Stretch">
<staticText>
<reportElement x="11" y="10" width="179" height="22"/>
<textElement>
<font size="14"/>
</textElement>
<text><![CDATA[Successful field evaluation:]]></text>
</staticText>
<textField>
<reportElement x="190" y="10" width="296" height="22"/>
<textElement>
<font size="14"/>
</textElement>
<textFieldExpression class="java.lang.String"><![CDATA["0x"+Integer.toHexString($V{NotNullVariable}.intValue()+55)]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="11" y="32" width="179" height="22"/>
<textElement>
<font size="14"/>
</textElement>
<text><![CDATA[NPE on field evaluation:]]></text>
</staticText>
<textField>
<reportElement x="190" y="32" width="296" height="22"/>
<textElement>
<font size="14"/>
</textElement>
<textFieldExpression class="java.lang.String"><![CDATA["0x"+Integer.toHexString($V{NullVariable}.intValue()+55)]]></textFieldExpression>
</textField>
</band>
</title>
<detail>
<band height="24" splitType="Stretch"/>
</detail>
</jasperReport>

It doesn't sound like a null pointer expression problem. It sounds like your data source allows null fields. JasperReports is robust enough to handle a report where some information is missing. There is a property you can set so that when information is missing the field prints "null" or is left blank. If you don't want the report to generate at all if the data field is null, modify your data source so the fields are "not null".
Alternatively, drop on a conditional statement so that your scriptlet only runs if th fields are not null and break if they are. Then when the report hits a null field it will stop.

stretch a row to fit the data in jasper reports using iReport

I use iReport 2.0.5 to generate jrxml file and use the same in my java web propject, I have used all the flags to stretch to fit the data, but it doesn't work
The example:
<textField isStretchWithOverflow="true" isBlankWhenNull="true" evaluationTime="Now" hyperlinkType="None" hyperlinkTarget="Self" >
<reportElement style="dNew" mode="Opaque" x="55" y="0" width="55" height="19" key="value-1" stretchType="RelativeToTallestObject" positionType="Float" isPrintWhenDetailOverflows="true"/>
<box></box>
<textElement>
<font/>
</textElement>
<textFieldExpression class="java.lang.String"><![CDATA[$F{value1}]]></textFieldExpression>
</textField>

It should be able to stretch down based on the band.
If it is a TextField you can set the option "Stretch with Overflow" AFAIK straight StaticTexts will not overflow.

Add the following two properties in your reportElement tag.
name="net.sf.jasperreports.print.keep.full.text" value="true"
name="net.sf.jasperreports.export.xls.wrap.text" value="false"