How to read data from properties file and store in to Map

In this article we are going to discuss about how to read data from properties and store in to map.

Filename: sample.properties

## Web Site information
site1 = www.google.com
site2 = www.becbe.com
site3 = www.linux.com
site4 = www.motorola.com
site5 = www.apple.com

Filename: ReadPropertiesFileToMap.java

package com.becbe.sample;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;

/**
 * 
 */

/**
 * @author tponnam
 *
 */
public class ReadPropertiesFileToMap {
 private String filePath="d:\\sample.properties";
 
 /**
  * This method validate the file existence 
  * @return
  */
 private File getPropertiesFile()
 {
  File file = new File(filePath);
  if( !file .exists()){
   try {
    file.createNewFile();
    
   } catch (IOException e) {
    
   }
  }
  return file;
 }
 
 /**
  * This Method reads data from properties file and store into Map
  * @return
  */
 public HashMap getSBX5kNodeToProxyPortMap(){
     HashMap map = new HashMap();
  Properties properties = new Properties();
  try {
   properties.load(new FileInputStream(getPropertiesFile()));
     for (String key : properties.stringPropertyNames()) {
         String value = properties.getProperty(key);
         map.put(key, value);
       }

  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
  return map;
  
 }
 public static void main(String[] args) {
  
  ReadPropertiesFileToMap fileToMap = new ReadPropertiesFileToMap();
  HashMap map = fileToMap.getSBX5kNodeToProxyPortMap();
  Iterator iter = map.entrySet().iterator();
   
  while (iter.hasNext()) {
   Map.Entry mEntry = (Map.Entry) iter.next();
   System.out.println(mEntry.getKey() + " : " + mEntry.getValue());
  }
 }
}

Output:

site5 : www.apple.com
site4 : www.motorola.com
site3 : www.linux.com
site2 : www.becbe.com
site1 : www.google.com

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