In this tutorials, we will see how to work with Spring Boot PDF with iText using String Template.
Spring Boot PDF iText integration:
Technologies:
- SpringBoot 1.4.5.RELEASE
- iTextpdf 5.2.0
- String Template 3.2
- iText Pdf tool xmlworker 1.1
- HTML cleaner 2.2
- Java 8
Example Spring Boot PDF iText:
Project Structure:
pom.xml
Included iText pdf, StringTemplate, htmlcleaner and recommended dependencies.
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.onlinetutorialspoint</groupId>
<artifactId>SpringBoot-iText-Pdf-Example</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>SpringBoot-iText-Pdf-Example</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.5.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.2.0</version>
</dependency>
<dependency>
<groupId>org.antlr</groupId>
<artifactId>stringtemplate</artifactId>
<version>3.2</version>
</dependency>
<dependency>
<groupId>com.itextpdf.tool</groupId>
<artifactId>xmlworker</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>net.sourceforge.htmlcleaner</groupId>
<artifactId>htmlcleaner</artifactId>
<version>2.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Data.java
It is used to provide dynamic data to String template.
package com.onlinetutorialspoint.beans;
public class Data {
private String empNumber;
private String empName;
private String joiningDate;
private String salary;
private String deptNo;
private String managerId;
public Data(String empNumber, String empName,String joiningDate, String salary, String deptNo, String managerId) {
super();
this.empNumber = empNumber;
this.empName = empName;
this.joiningDate = joiningDate;
this.salary = salary;
this.deptNo = deptNo;
this.managerId = managerId;
}
public String getEmpNumber() {
return empNumber;
}
public void setEmpNumber(String empNumber) {
this.empNumber = empNumber;
}
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName;
}
public String getJoiningDate() {
return joiningDate;
}
public void setJoiningDate(String joiningDate) {
this.joiningDate = joiningDate;
}
public String getSalary() {
return salary;
}
public void setSalary(String salary) {
this.salary = salary;
}
public String getDeptNo() {
return deptNo;
}
public void setDeptNo(String deptNo) {
this.deptNo = deptNo;
}
public String getManagerId() {
return managerId;
}
public void setManagerId(String managerId) {
this.managerId = managerId;
}
}
Exports.java
Export Controller is used to handling actual pdf export logic. Where we create Data object and passed dynamic data to the StringTemplate object.
package com.onlinetutorialspoint.controller;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.html.simpleparser.HTMLWorker;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.tool.xml.Pipeline;
import com.itextpdf.tool.xml.XMLWorker;
import com.itextpdf.tool.xml.XMLWorkerHelper;
import com.itextpdf.tool.xml.html.Tags;
import com.itextpdf.tool.xml.parser.XMLParser;
import com.itextpdf.tool.xml.pipeline.css.CSSResolver;
import com.itextpdf.tool.xml.pipeline.css.CssResolverPipeline;
import com.itextpdf.tool.xml.pipeline.end.PdfWriterPipeline;
import com.itextpdf.tool.xml.pipeline.html.HtmlPipeline;
import com.itextpdf.tool.xml.pipeline.html.HtmlPipelineContext;
import com.onlinetutorialspoint.beans.Data;
import org.antlr.stringtemplate.StringTemplate;
import org.antlr.stringtemplate.StringTemplateGroup;
import org.htmlcleaner.HtmlCleaner;
import org.htmlcleaner.TagNode;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.StringReader;
@Controller
public class Exports {
@RequestMapping(value = "generatePDF.htm", method = RequestMethod.GET)
public void exportToPDF(final HttpServletRequest request, final HttpServletResponse response) throws IOException {
OutputStream os = null;
try {
Data data = new Data("8596582","CHANDRA SHEKHAR","03/30/2016","$2,000.00","1005205",
"452562");
StringTemplate page = getStringTemplate();
page.setAttribute("data",data);
String content = page.toString();
final HtmlCleaner htmlCleaner = new HtmlCleaner();
final TagNode tagNode = htmlCleaner.clean(content);
content = htmlCleaner.getInnerHtml(tagNode);
os = response.getOutputStream();
Document document = null;
document = new Document(PageSize.A4);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final PdfWriter writer = PdfWriter.getInstance(document, baos);
document.open();
final HtmlPipelineContext htmlContext = new HtmlPipelineContext();
htmlContext.setTagFactory(Tags.getHtmlTagProcessorFactory());
final CSSResolver cssResolver = XMLWorkerHelper.getInstance().getDefaultCssResolver(true);
final Pipeline<?> pipeline = new CssResolverPipeline(cssResolver, new HtmlPipeline(htmlContext,
new PdfWriterPipeline(document, writer)));
final XMLWorker worker = new XMLWorker(pipeline, true);
final XMLParser parser = new XMLParser(worker);
try {
parser.parse(new StringReader(content));
} catch (final Exception e) {
e.printStackTrace();
}
document.close();
response.setContentType("Content-Type: text/html; charset=UTF-8");
response.addHeader(
"Content-Disposition",
"attachment; filename=employee_details.pdf");
response.setContentLength(baos.size());
baos.writeTo(os);
} catch (final IOException | DocumentException e) {
e.printStackTrace();
} finally {
try {
if (os != null) {
os.flush();
os.close();
}
} catch (final IOException e) {
e.printStackTrace();
}
}
}
StringTemplate getStringTemplate() {
final StringTemplateGroup group = new StringTemplateGroup("Generators");
return group.getInstanceOf("employee_details");
}
}
HomeController.java
package com.onlinetutorialspoint.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
public class HomeController {
@RequestMapping(value = "index", method = RequestMethod.GET)
public String init(Model model) {
return "index.jsp";
}
}
Creating StringTemplate.
employee_details.st
<html>
<body leftmargin='10.0' rightmargin='10.0' topmargin='10.0' bottommargin='10.0' style='font-family: Arial; font-size: 14.0pt; '>
<div>
<table style='font-size:8.0pt; font-family:Arial; border: 0.5px thick #000000; border-collapse: collapse; width: 1500pt;'>
<tr>
<td colspan='2' style='text-align:left; padding: .1pt .1pt .1pt .1pt;'>
<p style='color: green;line-height: 12.0pt' >
</p>
</td>
<td colspan='4' style='text-align:left; padding: .1pt .1pt .1pt .1pt;'>
<p style='color: black;line-height: 12.0pt' >
<b><span style='font-size:16.0pt;font-family:Arial;color:00a8ff'>EMPLOYEE DETAILS</span></b>
</p>
</td>
</tr>
<tr>
<td colspan='6' style='text-align:left; background-color:00b894;'>
<br/>
</td>
</tr>
</table>
<div>
</div>
<div leftmargin='36.0' rightmargin='36.0' topmargin='36.0' bottommargin='36.0'>
<table style='font-size:8.0pt; font-family:Arial; border-collapse: collapse; width: 900pt;'>
<tr>
<td style='text-align:left; width:50%;padding: .1pt .1pt .1pt .1pt;'>
<p style='line-height: 12.0pt' >
<b><span style='font-size:10.0pt;font-family:Arial;'>Employee Number</span></b>
</p>
</td>
<td style='text-align:left; width:50%;padding: .1pt .1pt .1pt .1pt;'>
<p style='line-height: 12.0pt' >
<b><span style='font-size:10.0pt;font-family:Arial;'>Joining Date</span></b>
</p>
</td>
</tr>
<tr>
<td style='text-align:left; width:50%; padding: .1pt .1pt .1pt .1pt;'>
<p style='line-height: 12.0pt' >
<b><span style='font-size:10.0pt;font-family:Arial;'>$data.empNumber$</span></b>
</p>
</td>
<td style='text-align:left; width:50%; padding: .1pt .1pt .1pt .1pt;'>
<p style='line-height: 12.0pt' >
<b><span style='font-size:10.0pt;font-family:Arial;'>$data.joiningDate$</span></b>
</p>
</td>
</tr>
<tr>
<td colspan=2 style='width:100%;'>
<p style='line-height: 12.0pt' >
</p>
</td>
</tr>
</table>
<div>
</div>
<table style='font-size:8.0pt; font-family:Arial; border: 0.5px thick #000000; border-collapse: collapse; width: 900pt;'>
<tr>
<td colspan='2' style='padding: .1pt .1pt .1pt .1pt; width : 100%'>
<b><span style='font-size:10.0pt;font-family:Arial;'>EMPLOYEE NAME</span></b>
</td>
</tr>
<tr>
<td colspan='2' style='padding: .1pt .1pt .1pt .1pt; width : 100%'>
<b><span style='font-size:10.0pt;font-family:Arial;'>$data.empName$</span></b>
</td>
</tr>
<tr>
<td colspan='2' style='padding: .1pt .1pt .1pt .1pt; width : 100%'>
<span style='font-size:10.0pt;font-family:Arial;'>DEPARTMENT NUMBER</span>
</td>
</tr>
<tr>
<td colspan='2' style='padding: .1pt .1pt .1pt .1pt; width : 100%'>
<span style='font-size:10.0pt;font-family:Arial;'>$data.deptNo$</span>
</td>
</tr>
<tr>
<td colspan='2' style='padding: .1pt .1pt .1pt .1pt; width : 100%'>
</td>
</tr>
<tr>
<td colspan='2' style='padding: .1pt .1pt .1pt .1pt; width : 100%'>
<span style='font-size:10.0pt;font-family:Arial;'>SALARY</span>
</td>
</tr>
<tr>
<td colspan='2' style='padding: .1pt .1pt .1pt .1pt; width : 100%'>
<span style='font-size:10.0pt;font-family:Arial;'>$data.salary$ </span>
</td>
</tr>
<tr>
<td colspan='2' style='padding: .1pt .1pt .1pt .1pt; width : 100%'>
</td>
</tr>
<tr>
<td style='padding: .1pt .1pt .1pt .1pt; width : 50%'>
<span style='font-size:10.0pt;font-family:Arial;'></span>
</td>
<td style='padding: .1pt .1pt .1pt .1pt; width : 50%'>
<span style='font-size:10.0pt;font-family:Arial;'>MANAGER ID</span>
</td>
</tr>
<tr>
<td style='padding: .1pt .1pt .1pt .1pt; width : 50%'>
<span style='font-size:10.0pt;font-family:Arial;'></span>
</td>
<td style='padding: .1pt .1pt .1pt .1pt; width : 50%'>
<span style='font-size:10.0pt;font-family:Arial;'>$data.managerId$</span>
</td>
</tr>
<tr>
<td colspan='2' style='padding: .1pt .1pt .1pt .1pt; width : 16%'>
</td>
</tr>
</table>
<div><br/></div>
</div>
</div>
</body>
</html>
Spring Boot Application.java
package com.onlinetutorialspoint;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
Run Application:
mvn clean install mvn spring-boot:run [INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ SpringBoot-iText-Pdf-Example --- [INFO] No sources to compile [INFO] [INFO] <<< spring-boot-maven-plugin:1.4.5.RELEASE:run (default-cli) < test-compile @ SpringBoot-iText-Pdf-Example <<< [INFO] [INFO] --- spring-boot-maven-plugin:1.4.5.RELEASE:run (default-cli) @ SpringBoot-iText-Pdf-Example --- . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v1.4.5.RELEASE) 2018-05-20 18:40:47.665 INFO 5616 --- [ main] com.onlinetutorialspoint.Application : Starting Application on DESKTOP-RN4SMHT with PID 5616 (E:\work\SpringBoot-iText-Pdf-Example\target\classes started by Lenovo in E:\work\SpringBoot-iText-Pdf-Example) 2018-05-20 18:40:47.665 INFO 5616 --- [ main] com.onlinetutorialspoint.Application : No active profile set, falling back to default profiles: default 2018-05-20 18:40:47.790 INFO 5616 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@68db8c58: startup date [Sun May 20 18:40:47 IST 2018]; root of context hierarchy 2018-05-20 18:40:50.684 INFO 5616 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http) 2018-05-20 18:40:50.705 INFO 5616 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat 2018-05-20 18:40:50.705 INFO 5616 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.11 .... ....
Output:
Access application using : http://localhost:8080/index
Click on Download button, then the pdf will download into your local system.
Happy Learning 🙂
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