jmeter导入jar包后，用beanshell时报引入包错误 Typed variable declaration : Object constructor

[爱笑的人更可爱]

最近用jmeter的beanshell功能，我想根据图片的url地址，把图片下载并保存到指定目录，
1.我先在测试计划里把需要导入的jar包都导入进去了，如下图1所示：
2.然后添加了一个beanshell sampler，并在里面写上如下的源代码并运行（代码在java环境自测过，能下载图片并保存到本地）；
3.运行时，发现走到这里（ // 输出的文件流 OutputStream os = new FileOutputStream(filename);）就报错了，看错误日志，以为是导入jar包的问题，后来又有人说可能是参数出错，会提示引入的包报错，让人误以为是引入错误。但我自己真不知道怎么改了，请哪位大神帮我看看是哪里出问题了。

【源代码】

import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;
    
	log.info("-----------------------------------------");
	String urlString ="${questionUrl}";
	urlString = urlString.trim();
	String filename= "D:\\testpic.jpg";
		
    // 构造URL
    URL url = new URL("http://"+urlString);  
    log.info("url:" +url); 
 
    // 打开连接
    URLConnection con = url.openConnection();
   
    // 输入流
    InputStream is = con.getInputStream();
    
    // 1K的数据缓冲
    byte[] bs = new byte[1024];
     log.info("running line11 -----------------------------------------");
    // 读取到的数据长度
    int len;
    log.info("running line12 -----------------------------------------");
    // 输出的文件流
    OutputStream os = new FileOutputStream(filename);
 
    log.info("running line13 -----------------------------------------");
    // 开始读取
    while ((len = is.read(bs)) != -1) {
      os.write(bs, 0, len);
    }
    // 完毕，关闭所有链接
    os.close();
    is.close();

【jmeter报错日志】

2017/06/22 17:35:44 INFO  - jmeter.engine.StandardJMeterEngine: Running the test! 
2017/06/22 17:35:44 INFO  - jmeter.samplers.SampleEvent: List of sample_variables: [] 
2017/06/22 17:35:44 INFO  - jmeter.testelement.TestPlan: add D:\software\apache-jmeter-3.0\practicejar\tools.jar to classpath 
2017/06/22 17:35:44 INFO  - jmeter.testelement.TestPlan: add D:\software\apache-jmeter-3.0\practicejar\dt.jar to classpath 
2017/06/22 17:35:44 INFO  - jmeter.testelement.TestPlan: add D:\software\apache-jmeter-3.0\practicejar\junit-test.jar to classpath 
2017/06/22 17:35:44 INFO  - jmeter.gui.util.JMeterMenuBar: setRunning(true,*local*) 
2017/06/22 17:35:44 INFO  - jmeter.engine.StandardJMeterEngine: Starting ThreadGroup: 1 : 正常卷判分 
2017/06/22 17:35:44 INFO  - jmeter.engine.StandardJMeterEngine: Starting 1 threads for group 正常卷判分. 
2017/06/22 17:35:44 INFO  - jmeter.engine.StandardJMeterEngine: Thread will continue on error 
2017/06/22 17:35:44 INFO  - jmeter.threads.ThreadGroup: Starting thread group number 1 threads 1 ramp-up 0 perThread 0.0 delayedStart=false 
2017/06/22 17:35:44 INFO  - jmeter.threads.ThreadGroup: Started thread group number 1 
2017/06/22 17:35:44 INFO  - jmeter.engine.StandardJMeterEngine: All thread groups have been started 
2017/06/22 17:35:44 INFO  - jmeter.threads.JMeterThread: Thread started: 正常卷判分 1-1 
2017/06/22 17:35:44 INFO  - jmeter.services.FileServer: Stored: D:\scriptFile\jmeter\parameter\yjxdata.csv 
2017/06/22 17:35:45 INFO  - jmeter.util.BeanShellTestElement: ----------------------------------------- 
2017/06/22 17:35:45 INFO  - jmeter.util.BeanShellTestElement: url:http://图片地址.jpg 
2017/06/22 17:35:45 INFO  - jmeter.util.BeanShellTestElement: running line11 ----------------------------------------- 
2017/06/22 17:35:45 INFO  - jmeter.util.BeanShellTestElement: running line12 ----------------------------------------- 
2017/06/22 17:35:45 ERROR - jmeter.util.BeanShellInterpreter: Error invoking bsh method: eval	Sourced file: inline evaluation of: ``import java.io.FileOutputStream; import java.io.InputStream; import java.io.Outp . . . '' : Typed variable declaration : Object constructor 
2017/06/22 17:35:45 WARN  - jmeter.protocol.java.sampler.BeanShellSampler: org.apache.jorphan.util.JMeterException: Error invoking bsh method: eval	Sourced file: inline evaluation of: ``import java.io.FileOutputStream; import java.io.InputStream; import java.io.Outp . . . '' : Typed variable declaration : Object constructor 

[爱笑的人更可爱]

问题已解决，是因为log语句不能有空格，也不能把加号变为别的符号，改成如下的样式就正常了。 log.info("url:"+url);