/**  * 使用org.apache.commons.beanutils进行转换  */  class A {            public static Object mapToObject(Map
     
       map, Class
       beanClass) throws Exception {            if (map == null)              return null;            Object obj = beanClass.newInstance();            org.apache.commons.beanutils.BeanUtils.populate(obj, map);            return obj;      }              public static Map
       objectToMap(Object obj) {          if(obj == null)              return null;             return new org.apache.commons.beanutils.BeanMap(obj);      }          }    /**  * 使用Introspector进行转换  */  class B {        public static Object mapToObject(Map
      
        map, Class
        beanClass) throws Exception {            if (map == null)               return null;              Object obj = beanClass.newInstance();            BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();            for (PropertyDescriptor property : propertyDescriptors) {              Method setter = property.getWriteMethod();                if (setter != null) {                  setter.invoke(obj, map.get(property.getName()));               }          }            return obj;      }              public static Map
       
         objectToMap(Object obj) throws Exception {            if(obj == null)              return null;                Map
        
          map = new HashMap
         
          ();             BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();            for (PropertyDescriptor property : propertyDescriptors) {                String key = property.getName();                if (key.compareToIgnoreCase("class") == 0) {                   continue;              }              Method getter = property.getReadMethod();              Object value = getter!=null ? getter.invoke(obj) : null;              map.put(key, value);          }              return map;      }          }    /**  * 使用reflect进行转换  */  class C {        public static Object mapToObject(Map
          
            map, Class
            beanClass) throws Exception { if (map == null) return null; Object obj = beanClass.newInstance(); Field[] fields = obj.getClass().getDeclaredFields(); for (Field field : fields) { int mod = field.getModifiers(); if(Modifier.isStatic(mod) || Modifier.isFinal(mod)){ continue; } field.setAccessible(true); field.set(obj, map.get(field.getName())); } return obj; } public static Map
           
             objectToMap(Object obj) throws Exception { if(obj == null){ return null; } Map
            
              map = new HashMap
             
              (); Field[] declaredFields = obj.getClass().getDeclaredFields(); for (Field field : declaredFields) { field.setAccessible(true); map.put(field.getName(), field.get(obj)); } return map; } }