package util; 
  
 import java.beans.BeanInfo; 
 import java.beans.Introspector; 
 import java.beans.PropertyDescriptor; 
 import java.lang.reflect.Method; 
 import java.util.HashMap; 
 import java.util.Map; 
  
 public class BeanMap{ 
 	private Object bean; 
 	private Map <String,Method> readMethods; 
 	private Map <String,Method> writeMethods; 
 	private Map <String,Class <Object>> types; 
 	 
 	public BeanMap(Object bean){ 
 		this.bean = bean; 
 		initialise(); 
 	} 
 	 
 	/** 
 	 * 为bean属性设置值 
 	 * @param name 属性名称 
 	 * @param value 属性值 
 	 * @throws Exception 当属性不存在或者属性类型不匹配时可能会抛出异常 
 	 */ 
 	public void set(String name, Object value) throws Exception{ 
 		if(name.indexOf(".")>0){ 
 			Object obj = this.get(name.substring(0, name.indexOf("."))); 
 			BeanMap bm = new BeanMap(obj); 
 			bm.set(name.substring(name.indexOf(".")+1), value); 
 		}else{ 
 			Class <Object> type = types.get(name); 
 			Method method = writeMethods.get(name); 
 			if(type==null || method==null){ 
 				throw new java.lang.NoSuchFieldException(); 
 			} 
 			method.invoke(bean, value); 
 		} 
 	} 
 	 
 	/** 
 	 * 取得bean的属性值 
 	 * @param name 
 	 * @return 
 	 * @throws Exception 
 	 */ 
 	public Object get(String name) throws Exception{ 
 		if(name.indexOf(".")>0){ 
 			Object obj = this.get(name.substring(0, name.indexOf("."))); 
 			BeanMap bm = new BeanMap(obj); 
 			return bm.get(name.substring(name.indexOf(".")+1)); 
 		}else{ 
 			Class <Object> type = types.get(name); 
 			Method method = readMethods.get(name); 
 			if(type==null || method==null){ 
 				throw new java.lang.NoSuchFieldException(); 
 			} 
 			return method.invoke(bean); 
 		} 
 	} 
 	 
 	@SuppressWarnings("unchecked") 
 	/** 
 	 * 为bean map进行初始化 
 	 */ 
 	private void initialise() 
   { 
 		readMethods = new HashMap <String,Method>(); 
 		writeMethods = new HashMap <String,Method>(); 
 		types = new HashMap <String,Class <Object>>(); 
     if(bean == null) return; 
     Class  beanClass = bean.getClass(); 
     try  
     { 
       BeanInfo beanInfo = Introspector.getBeanInfo(beanClass); 
       PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors(); 
       if ( propertyDescriptors != null )  
       { 
         for ( int i = 0; i  < propertyDescriptors.length; i++ )  
         { 
           PropertyDescriptor propertyDescriptor = propertyDescriptors[i]; 
           if ( propertyDescriptor != null )  
           { 
             String name = propertyDescriptor.getName(); 
             Method readMethod = propertyDescriptor.getReadMethod(); 
             Method writeMethod = propertyDescriptor.getWriteMethod(); 
             Class aType = propertyDescriptor.getPropertyType();