Jmeter获取csv文件行数

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
String rowNum1;
int rowNum=0;
try{	BufferedReader br=new BufferedReader(new FileReader("E:\Git\Documentation\111.csv"));
String tmpStr="";
while((tmpStr=br.readLine())!=null)
{		rowNum++;
}
rowNum=rowNum-1;
}
catch (IOException ioe)
{	
	ioe.printStackTrace();
}
vars.put("rowNum",String.valueOf(rowNum));
//log.info("文件行数："+rowNum);