计算签名及beanshell断言

import org.apache.commons.codec.digest.DigestUtils;
import java.io.*;
import org.apache.jmeter.config.Arguments; 
Arguments args = sampler.getArguments(); 
String str1 = vars.get("body"); 
//String bodyStr = str1.substring(1, str1.length()).replace("(","").replace(")","");

String timestamptmp = String.valueOf(Long.valueOf("${__time(,)}"));

String query_str = "body=" + str1 + "&timestamp=" + timestamptmp + "&uid=" + "${mobile}" ; //&req_id=123
String sig = DigestUtils.sha256Hex(query_str).toUpperCase();

vars.put("timestamp",timestamptmp);
vars.put("sig",sig);
vars.put("query_str",query_str);


log.info("AAAAA"+ctx.getCurrentSampler());
//log.info("KKKKKKKKKK"+query_str);
//log.info("PPPPP"+bodyStr);

code=vars.get("rescode");


if (!code.equals("00000")) {   //响应信息的状态值status_str不等于0，则断言其他与实际值不一致
    Failure=true;       
    FailureMessage="请求失败";
};