writing to file

[yuvaraj vanarase]

hi
i want to update the properties [may be present in build.properties or project.properties file] ..i mean setting the values [e.g if 'firstOpt=true' i want to make it 'false' etc] through maven.xml
...can i do this..? How..?

i am using jelly script in maven.xml ... i can read properties well from these properties file but i cant reset them dynamically...
should i go for some plugin...again i dont know if we can set values to properties in plugin...

can some body help me in this regard..?

yuvaraj,

[san-chang chen]

hello

 
import java.io.*;
import java.util.Properties;
 
public class PropertiesTest {
   public static void main(String[] args) throws IOException{
     //list system variable
     System.getProperties().list(System.out);
 
     System.out.println("===============");
     System.out.println(System.getProperty("java.runtime.name"));
     System.out.println("===============");
 
     //set of the system variable
     System.setProperty("Test.System","TestOK");
     System.out.println(System.getProperty("Test.System"));
 
     FileInputStream f = new FileInputStream("D:/JavaBeanSource/Test.txt");
 
     Properties p = new Properties();
 
     //load to properties 
     p.load(f);
 
     //set of the properties variable
     p.setProperty("Test.property","Test");
     p.setProperty("Test1.property","Test1");
 
     //get of the properties variable
     System.out.println(p.getProperty("Test.property"));
     System.out.println(p.getProperty("Test1.property"));
 
     FileOutputStream outF = new FileOutputStream("D:/JavaBeanSource/Test.txt");
 
     p.store(outF,"set of properties");
 
     //properties variable set to system variable
     System.setProperties(p);
     System.out.println("===============");
     //list system variable
     System.getProperties().list(System.out);
   }
}