Sunday, November 12, 2017

Read and Parse XML using JAXB and write to a flat file with fixed length format using fixedFormat4j and Java

This post will explain, how to read xml ,parse xml and write to a flat file with fixed length format.

Step 1: Create a maven project -< xmltofile>

Step2: paste the below code into pom.xml file.



Step 3: Now we need to create company.xml file under project- create one xml file add the below xml to that file.

Present Bangalore Karnataka India
Permanent Kadapa AndharaPradesh India
Sanjay 27 Male 55000 01/07/1988
Present Bangalore Karnataka India
Permanent Hyderabad Telangana India
Madhan 34 Male 800000 01/07/1983
Present and Permanent Bangalore Karnataka India

Step 4: Create pojo classes , which need to be parsed as per above xml.

i have created 3 classes - -> List of -> List Of - xmlroot elment is company which is there in xml.

package xmltofile;

import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

public class Company {
 private List employee = new ArrayList();

 public List getEmployee() {
  return employee;

 public void setEmployee(List employee) {
  this.employee = employee;


package xmltofile;

import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.annotation.XmlElement;
public class Employee {
 private String name;
 private int age;
 private String gender;
 private Double salary;
 private String dob;
address = new ArrayList
(); public String getName() { return name; } public void setName(String name) { = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getGender() { return gender; } public void setGender(String gender) { this.gender = gender; } public Double getSalary() { return salary; } public void setSalary(Double salary) { this.salary = salary; } @XmlElement public List
getAddress() { return address; } public void setAddress(List
address) { this.address = address; } public String getDob() { return dob; } public void setDob(String dob) { this.dob = dob; } }

package xmltofile;

import javax.xml.bind.annotation.XmlRootElement;

public class Address {
 private String city;
 private String type;
 private String state;
 private String country;
 public String getCity() {
  return city;
 public void setCity(String city) { = city;
 public String getType() {
  return type;
 public void setType(String type) {
  this.type = type;
 public String getState() {
  return state;
 public void setState(String state) {
  this.state = state;
 public String getCountry() {
  return country;
 public void setCountry(String country) { = country;


Step 5: Now we need to write class using fixedformat4j API-

package xmltofile.fixedformat;

import com.ancientprogramming.fixedformat4j.annotation.Field;
import com.ancientprogramming.fixedformat4j.annotation.Record;

public class CompanyHeader {
 private String header1;
 private String header2;
 private String header3;
 @Field(offset = 1, length = 20)
 public String getHeader1() {
  return header1;
 public void setHeader1(String header1) {
  this.header1 = header1;
 @Field(offset = 30, length = 50)
 public String getHeader2() {
  return header2;
 public void setHeader2(String header2) {
  this.header2 = header2;
 @Field(offset = 60, length = 100)
 public String getHeader3() {
  return header3;
 public void setHeader3(String header3) {
  this.header3 = header3;

} This class will have - each filed -at what is the starting index and data length of the eachfiled

package xmltofile.fixedformat;

import com.ancientprogramming.fixedformat4j.annotation.Field;
import com.ancientprogramming.fixedformat4j.annotation.Record;

public class EmployeeHeader {

 private String nameHeader;
 private String ageHeader;
 private String genderHeader;
 private String salaryHeader;
 private String dobHeader;
 private String addressHeader;
 @Field(offset = 1, length = 50)
 public String getNameHeader() {
  return nameHeader;
 public void setNameHeader(String nameHeader) {
  this.nameHeader = nameHeader;
 @Field(offset = 55, length = 3)
 public String getAgeHeader() {
  return ageHeader;
 public void setAgeHeader(String ageHeader) {
  this.ageHeader = ageHeader;
 @Field(offset = 60, length = 10)
 public String getGenderHeader() {
  return genderHeader;
 public void setGenderHeader(String genderHeader) {
  this.genderHeader = genderHeader;
 @Field(offset = 75, length = 10)
 public String getSalaryHeader() {
  return salaryHeader;
 public void setSalaryHeader(String salaryHeader) {
  this.salaryHeader = salaryHeader;
 @Field(offset = 90, length = 15)
 public String getDobHeader() {
  return dobHeader;
 public void setDobHeader(String dobHeader) {
  this.dobHeader = dobHeader;
 @Field(offset = 120, length = 200)
 public String getAddressHeader() {
  return addressHeader;
 public void setAddressHeader(String addressHeader) {
  this.addressHeader = addressHeader;


Step 6: Now we need to write test class to Parse the employee.xml using JAXB context and create the Flat file
and write the xml data into file at specified index.

package xmltofile;


import javax.xml.bind.JAXBContext;
import javax.xml.bind.Unmarshaller;

import com.ancientprogramming.fixedformat4j.format.FixedFormatManager;
import com.ancientprogramming.fixedformat4j.format.impl.FixedFormatManagerImpl;

import xmltofile.fixedformat.CompanyHeader;
import xmltofile.fixedformat.EmployeeHeader;

public class XMLReaderAndWriteToFile {

 public static void main(String[] args) {
  BufferedWriter bw = null;
  try {
   JAXBContext context = JAXBContext.newInstance(Company.class);
   // Create Unmarshaller using JAXB context
   Unmarshaller unmarshaller = context.createUnmarshaller();
   System.out.println("xml file started to load...");
   Company company = (Company) unmarshaller.unmarshal(new File("employee.xml"));
            System.out.println("xml file loaded and parsed successfully..");
   // Write to file with fixedformat
            System.out.println("Flat file started to create...");
   bw = new BufferedWriter(new FileWriter("fixedLength.txt", true));
   System.out.println("empty flat file created...");
   System.out.println("company header written successfully to file.");
   System.out.println("employee header written successfully to file.");
   for (Employee employee : company.getEmployee()) {
    EmployeeHeader employeeDetails = new EmployeeHeader();
    String completeAddress = "  ";
    for (Address address : employee.getAddress()) {
     String addressDetails = address.getCity() + " " + address.getState() + " " + address.getCountry()
       + " - " + address.getType();
     completeAddress = completeAddress.concat(addressDetails) + "     ";
    FixedFormatManager manager1 = new FixedFormatManagerImpl();
    String data1 = manager1.export(employeeDetails);

   System.out.println("Employee details written successfully to file.");

  } catch (Exception ex) {
  } finally {
   try {
   } catch (IOException e) {


 private static void getEmployeeHeader(BufferedWriter bw) throws IOException {
  EmployeeHeader employeeHeader = new EmployeeHeader();
  employeeHeader.setNameHeader("Employee Name");
  FixedFormatManager manager = new FixedFormatManagerImpl();
  String data = manager.export(employeeHeader);

 private static void getCompanyHeader(BufferedWriter bw) throws IOException {
  CompanyHeader companyHeader = new CompanyHeader();
  companyHeader.setHeader1("ABC Company");
  FixedFormatManager manager = new FixedFormatManagerImpl();
  String data = manager.export(companyHeader);



Output file will be like this.

ABC Company                  Bangalore                                                                                                                         

Employee Name                                         Age  Gender         Salary         DOB                           Address                                                                                                                                                                                                 

siva                                                         34   Male           35000.0        01/07/1983                      Bangalore Karnataka India - Present     Kadapa AndharaPradesh India - Permanent                                                                                                                       
Sanjay                                                     27   Male           55000.0        01/07/1988                      Bangalore Karnataka India - Present     Hyderabad Telangana India - Permanent                                                                                                                         
Madhan                                                   34   Male           800000.0       01/07/1983                     Bangalore Karnataka India - Present and Permanent                                                                                                                                                     

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Monday, November 6, 2017 PKIX path building failed: Gradle eclipse PKIX path building failed:

If you are getting this error . While running the gradle build task from eclipse.
cacert might becorrupted.. which is there inside jdk/jre/lib

to change this copy or download the latest cacert from other system or internt.

create file and place it inside your .gradle home, which is configured in eclipse.\\Users\\ca-certs

Wednesday, November 1, 2017

Getting Started with Spring Boot Application on Pivotal Cloud Foundry Platform On Windows Environment , Pivotal Webservice Console and Microservice

This Post will explain , how to Deploy Spring Boot Application on Pivotal Cloud Foundry Platform

Now a days Cloud Computing and Microservice have become very popular concept and almost all the organizations are investing and adapting it very fast. Currently there are only

few popular cloud providers in the market and Pivotal Cloud Foundry is one of them. It is a PaaS(Platform AS A Servcie) service where we can easily deploy and manage our

applications and the Cloud Foundry will take care of the rest of the cloud based offerings like scalability, high availability etc.

Today we will learn to deploy spring boot application in Pivotal cloud foundry platform called as Pivotal Web Services.

Step 1: What is Cloud Foundry?

Cloud Foundry is an open-source platform as a service (PaaS) that provides you with a choice of clouds, developer frameworks, and application services. It is open source and it is governed by the Cloud Foundry Foundation. The original Cloud Foundry was developed by VMware and currently it is managed by Pivotal

Step 2: Now we need to install Cloud Foundary on Windows

Step 3: Download Cloud Foundary Windows Installer using this link

Step 4: Unzip the file, From the place where you have saved the downloaded file.

Step 5: Double Click on the cf_installer.exe file and click on the next.. next buttons until it completes

Step 6: If you have successfully installed then you can check the CLI version or other details

Enter cf command prompt. It will give list of options which cf will accept.
c:/> cf vesion -  will give full CLI version details

Step 7: Now we need to be setup Pivotal Webservice Console (PWS)

Step 8: Provide necessary details and sign up the same.

Once sign up is completed, we can log into the Pivotal webservice console through the login screen of the pivotal web service console.

After providing login credentials successfully we will get into the cloud foundry console where we can see all the deployed applications, can monitor the applications and do many more activities. Here we need to add org and space etc...

Step 9: Once we have created org and space successfully.. now we need to deploy the spring boot application in PCF.

Step 10: Before that , Login in to PWS (Pivotal Webservice Console) using CLI

c:/> cf login -a

Provide username and password which is given , while registering the PWS.

same way we can use Logout
c:/> cf logout

Step 11: Now login and logout is working with out any issues.

Step 12: Now write simple spring boot application and run the same in locally.

If you want to write simple one follow the - which will create sample spring boot application for you and modify as per your requirment.

i have created one sample arthimetic operations spring boot application.. check in
my previous post for the same.

add the below code into under src\main\resources

server.contextPath = /
       = false

Step 13: Once we have completed the Spring boot application and executed successfully in local environment.

Now we need to push the same into Pivotal cloud Foundary.

Step 14: login into PWS using CLI c:/> cf login -a

Step 15: Go to where spring boot application is saved . Then push to PCF

F:\spring_boot_example\helloworld-springboot>cf push helloworld-springboot -p target\helloworld-springboot-0.0.1-SNAPSHOT.jar

Step 16: Now we have deployed spring boot application into Pivotal Cloud Foundary Successfully.

Step 17: Open the PWS console and check the details. whether pushed application through CLI is available or not in PWS console.

Step 18: Open the below links and you can see the output as follows.

Step 19: This is how we will implement spring boot application and we can deploy the same in Pivotal Cloud Foundary.

Thank you very much for viewing this post. if you like this please share the same
If you face any issues.. write a comment and you will get reply the same


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