接上一篇未解决的问题，继续...

beanshell前置处理器貌似因为作用域的问题解决不了，那这个问题怎么解决呢？

jmeter函数，可以自定义函数调用吗？答案是肯定的，下面附上代码：

其中FileRowColContainer为jmeter内部的类，刚好有文件行数的方法直接拿过来用，博友们也可以像上一篇beanshell中那样自己写

package try.jmeter.functions;import java.io.FileNotFoundException;import java.io.IOException;import java.util.Collection;import java.util.LinkedList;import java.util.List;import org.apache.jmeter.engine.util.CompoundVariable;import org.apache.jmeter.functions.AbstractFunction;import org.apache.jmeter.functions.FileRowColContainer;import org.apache.jmeter.functions.InvalidVariableException;import org.apache.jmeter.samplers.SampleResult;import org.apache.jmeter.samplers.Sampler;import org.apache.jmeter.util.JMeterUtils;public class FileRowCount extends AbstractFunction{    private Object[] values;    private FileRowColContainer fc;    private static final List
     
       desc = new LinkedList
      
       ();        static      {        desc.add(JMeterUtils.getResString("read_file_name"));      }    public List
       
         getArgumentDesc() {        // TODO Auto-generated method stub        return desc;    }    public synchronized String execute(SampleResult previousResult, Sampler currentSampler)            throws InvalidVariableException {        // TODO Auto-generated method stub         String myValue = "";         String fileName = ((CompoundVariable)this.values[0]).execute();         try {            fc = new FileRowColContainer(fileName);            myValue = String.valueOf(fc.getSize());         } catch (FileNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return myValue;    }    public String getReferenceKey() {        // TODO Auto-generated method stub        return "__FileRowCount";    }    public synchronized void setParameters(Collection
        
          parameters)            throws InvalidVariableException {        // TODO Auto-generated method stub        this.values = parameters.toArray();        checkParameterCount(parameters, 1);    }    }
        
       
      
     

注意事项：

1.包名必须包含.functions

2.继承AbstractFunction，实现抽象方法

3.打包成jar包放到jmeter/lib/ext下

查看调用图：

 

参数文件中共三行，问题终于解决了~~~