package com.nemo.web.modules.map.utils;  
import org.apache.commons.beanutils.BeanUtils; 
import org.apache.commons.collections.map.HashedMap;   
import java.beans.BeanInfo;  
import java.beans.Introspector; 
import java.beans.PropertyDescriptor;  
import java.lang.reflect.Method; 
import java.util.Map; 
 
/**  * Created by nemo on 16-6-23.  * Bean 操作类  */  
public class BeanUtil {

/**
 * // Map --> Bean 2: 利用org.apache.commons.beanutils 工具类实现 Map --> Bean
 * @param map
 * @param obj
 * @return
 */
 public static Object transMap2Bean2(Map, Object> map, Object obj) {
             if (map == null || obj == null) {
                 return new Object();  
             }

             try {
  
              BeanUtils.populate(obj, map);
             } catch (Exception e) {
                System.out.println("transMap2Bean2 Error " + e);
             }
             return obj;   
 }

 /**
  * Map --> Bean 1: 利用Introspector,PropertyDescriptor实现 Map --> Bean
  * @param map
  * @param obj
  * @return
  */        
 public static Object transMap2Bean(Map, Object> map, Object obj) {
       try {
            BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());  
            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
             for (PropertyDescriptor property : propertyDescriptors) {
                 String key = property.getName();
                 if (map.containsKey(key)) {
                        Object value = map.get(key);  // 得到property对应的setter方法   
                        Method setter = property.getWriteMethod();
                        setter.invoke(obj, value);   
                 }
             }

          } catch (Exception e) {
            System.out.println("transMap2Bean Error " + e);
          }
      return obj;
 }

 /**
  * Bean --> Map 1: 利用Introspector和PropertyDescriptor 将Bean --> Map
  * @param obj
  * @return
  */
 public static Map, Object> transBean2Map(Object obj) {
     if(obj == null){ 
        return null;
      }
      Map, Object> map = new HashedMap();
      try {
            BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();  
            for (PropertyDescriptor property : propertyDescriptors) {
                String key = property.getName();    // 过滤class属性  
                if (!key.equals("class")) { // 得到property对应的getter方法  
                    Method getter = property.getReadMethod();   
                    Object value = getter.invoke(obj);   
                    map.put(key, value);  
                }
            }
        } catch (Exception e) {
            System.out.println("transBean2Map Error " + e);  
        } 
        return map;
     }
}