package com.edwin.common;import java.lang.reflect.Method;import java.util.List;public class RunTime {    public static long invokeStaticMethod(String clsName, String methodName,            Object[] args) throws Exception {        long start = System.nanoTime();        try {            Class c = Class.forName(clsName);            Class[] argsClass = new Class[] {List.class};            Method method = c.getMethod(methodName, argsClass);            method.invoke(c, args);        } catch (Exception e) {            e.printStackTrace();        }        long end = System.nanoTime();        return end - start;    }}

package com.edwin.common;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.List; import org.apache.commons.collections.CollectionUtils;import org.apache.commons.collections.Transformer;public class Test {     /**     * @param args     */    public static List
    
      StringToIntegerLst(List
     
       inList){        List
      
        iList =new ArrayList
       
        (inList.size());        try{              for(int i=0,j=inList.size();i
        
         
           CollStringToIntegerLst(List
          
            inList){        List
           
             iList =new ArrayList
            
             (inList.size());        CollectionUtils.collect(inList,                   new Transformer(){                    public java.lang.Object transform(java.lang.Object input){                      return new Integer((String)input);                    }                  } ,iList );        return iList;    }    public static void main(String[] args) {        List
             
               sList = new ArrayList
              
               ();        for (int i=0;i<1000;i++) {             sList.add(String.valueOf(i));        }        Object[] param=new Object[]{sList};        try {            long runTime=RunTime.invokeStaticMethod("com.edwin.common.Test", "StringToIntegerLst", param);            System.out.println("采用顺序转化方法执行时间"+runTime);            long runTimeByColl=RunTime.invokeStaticMethod("com.edwin.common.Test", "CollStringToIntegerLst", param);            System.out.println("采用org.apache.commons.collections.CollectionUtils执行时间"+runTimeByColl);            System.out.println("微秒相差(runTimeByColl-runTime)=" +String.valueOf(runTimeByColl-runTime));        } catch (Exception e) {            e.printStackTrace();        }    }}