Create output file using bean shell

import org.apache.jmeter.services.FileServer;
import java.util.Date;
import java.text.SimpleDateFormat;




String DirPath = FileServer.getFileServer().getBaseDir()+File.separator;
String fileName="jmeterDemo.txt";
//log.info(DirPath);
//System.out.println(DirPath);
f = new FileOutputStream(DirPath+"jmeterDemo2.txt", false);
p = new PrintStream(f);


SimpleDateFormat formatter = new SimpleDateFormat( "yyMMddHHmmssZ" ); 
String datetime = formatter.format( new java.util.Date() );

SimpleDateFormat formatter2 = new SimpleDateFormat( "dd/M/yyyy" ); 
String exportedDate = formatter2.format( new java.util.Date() );


for(int i=1;i<=100;i++) {

    if(i==1){
     p.println("id,primar_id,email,first_name,last_name,dob,team_name,dependent_type,start_date,end_date,export_date");
    }
    email="perf_"+datetime+""+i+"@google.com";
    p.println(i+",,"+email+",first,last,01/01/1980,,self,06/23/2016,,"+exportedDate);
}
p.close();
f.close();

Jmeter Beanshell script

import org.apache.jmeter.services.FileServer;
import org.apache.jmeter.services.FileServer;
import java.util.Date;
import java.text.SimpleDateFormat;

SimpleDateFormat formatter = new SimpleDateFormat( "yyyyMMddHHmmss" );  
String datetime = formatter.format( new java.util.Date() ); 

1 Get current running counter value(C refrence name deifned in Counter config element)

String counter= vars.get("C");

2 Get Jmeter variable value in bean shell script by vars.get method

String timer= vars.get("JmeterTimerVariable");

here JmeterTimerVariable defined in User Defined variable config element

3 Display value in Console

System.out.println("Current counter value = " + counter);

System.out.println("JmeterTimerVariable value = " + timer);

4 Store beanshell script variable into Jmeter variable by using vars.put method and we will use this jmetervariable in Wikisearch http request

vars.put("JmeterSearchVariable",datetime+counter);

5 Get JmeterSearchVariable value in beanshell script

String SearchVariable = vars.get("JmeterSearchVariable");

System.out.println("SearchVariable value = " + SearchVariable);

6 Here we can get the directory path of Jmeter script file

String DirPath = FileServer.getFileServer().getBaseDir();

7 Write into jmeter.log file under Jmeter/bin directory

log.info(DirPath);

System.out.println("Directory path of Jmeter script file = " + FileServer.getFileServer().getBaseDir());

8 We will create a file under directory of jmeter script file with name JmeterReords using File system True file will be created if not and data will //append into the file False will create a new file with fresh data

f = new FileOutputStream(FileServer.getFileServer().getBaseDir()+"\\JmeterReords.txt", true); 
p = new PrintStream(f); 

9 Write data into file

p.println("Current counter value = " + counter);
p.println("JmeterTimerVariable value = " + timer);
p.println("Directory path of Jmeter script file = " +DirPath);
p.close();
f.close();

10 If you want to create unique file for each loop counter refer below script

String uniquefilename = timer+counter;
f = new FileOutputStream(FileServer.getFileServer().getBaseDir()+"\\"+uniquefilename+".log", true); 
p = new PrintStream(f); 

11 Write data into file

p.println("Current counter value = " + counter);
p.println("JmeterTimerVariable value = " + timer);
p.println("Directory path of Jmeter script file = " +DirPath);
p.close();
f.close(); 

I ran into a similar situation a while ago where I had to upload a signature file as part of a POST request. This signature file lived relative to the folder structure in which my JMeter scripts were located.

Try using the following BeanShell expression (which can be accessed as a system-level property) to resolve the relative path from the location in which your JMeter test-cases are located/executed.

${__BeanShell(import org.apache.jmeter.services.FileServer; FileServer.getFileServer().getBaseDir();)}${__BeanShell(File.separator,)}

• You can enter this with the name of the file you want to send/POST in the "Send Files With the Request" field by simply appending the file name.
  ${__BeanShell(import org.apache.jmeter.services.FileServer; FileServer.getFileServer().getBaseDir();)}${__BeanShell(File.separator,)}fileName.sig
• A more cleaner implementation would be declare this as a variable (local or global depending on the scope) and use this variable within the appropriate fields.
  absolutePath = ${__BeanShell(import org.apache.jmeter.services.FileServer; FileServer.getFileServer().getBaseDir();)}${__BeanShell(File.separator,)}
  ${absolutePath}fileName.sig

NOTE: This approach is super useful if you intend to plug your JMeter test files into a Continuous Integration system such as Jenkins. It makes your test-cases more maintainable.