将List转为Map 如List<javaBean>转为Map<String,javaBean>

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/*
* 将List转为Map 如List<javaBean>转为Map<String,javaBean>
* 参数List<?>为实体类的列表，getkey为获取主键的方法名
* 返回值为Map<String,javaBean>
* rcqjl
* */
public static Map<String,Object> listToMap( List<?> list,String getkey) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException, NoSuchMethodException, SecurityException{
  Map<String,Object> map = new HashMap<String,Object>();
  for(int i=0;i<list.size();i++){
   Class cl = list.get(i).getClass();
         Method m1 = cl.getDeclaredMethod(getkey);
         String dvcd = (String) m1.invoke(list.get(i));
    map.put(dvcd , list.get(i));

  }
  return map;
}

测试类

public class ListToMap {

public static void main(String[] args) throws Exception {

        /*
         * 实列化类方法2
         */
   VideoImage bean = new VideoImage();
        bean.setDvcd("1111111111");
        bean.setPath("d");
        VideoImage bean1 = new VideoImage();
        bean1.setDvcd("1111111112");
        bean1.setPath("d");

         List<VideoImage> list = new ArrayList<VideoImage>();
         list.add(bean);
         list.add(bean1);
        //得到类对象
         Map<String,Object> m = listToMap(list,"getDvcd");
         System.out.println(m.get("1111111111").toString());
         System.out.println(m.get("1111111112").toString());
     }
/*
* 将List转为Map 如List<javaBean>转为Map<String,javaBean>
* 参数List<?>为实体类的列表，getkey为获取主键的方法名
* 返回值为Map<String,javaBean>
* rcqjl
* */
public static Map<String,Object> listToMap( List<?> list,String getkey) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException, NoSuchMethodException, SecurityException{
  Map<String,Object> map = new HashMap<String,Object>();
  for(int i=0;i<list.size();i++){
   Class cl = list.get(i).getClass();
         Method m1 = cl.getDeclaredMethod(getkey);
         String dvcd = (String) m1.invoke(list.get(i));
    map.put(dvcd , list.get(i));

  }
  return map;
}
}

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