jmeter將返回數據保存在本地文件

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

try {
    FileWriter fstream=new FileWriter("E:\\pk.txt",true);
    BufferedWriter out=new BufferedWriter(fstream);

    if (!vars.get("token").equals("null")) { 
        log.info("ssssssssssssssssssssssssssssssssssssssssssssssssssssss");
        log.info(vars.get("token"));
        out.write(vars.get("token")+"\n");
    }
    out.close();
    fstream.close();
} catch (IOException e) {
    e.printStackTrace();
}