使用Beanshell PreProcessor生成一段随机字符串，可以用来赋值给变量，调用时使用${变量名}
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import java.util.Random;
String random(int s_length) {
strings= "ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
//int s_length = 10;
rstring ="";
for (int i=0; i<s_length ; i++) {
Random randomGenerator = new Random();
int randomInt = randomGenerator.nextInt(strings.length());
rstring += strings.substring(randomInt,randomInt+1);
}
return rstring ;
}
//log.info(random(10));
//log.info(random(20));
vars.put("random_10", random(10));
vars.put("random_20", random(20));
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常用变量
1、vars：实际引用jmeter线程的局部变量，连通jmeter和beanshell
vars.get("key") //获取变量值
vars.put("key","value") //存储value到变量key
2、log: 写入信息到日志中,log.info("")
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