import java.beans.BeanInfo; import java.beans.Introspector; import java.beans.PropertyDescriptor; import java.lang.reflect.Field; import java.util.HashMap; import java.util.Map; public class MapUtils { public static Map<String, Object> Bean2Map(Object obj) throws Exception { if(obj == null){ return null; } Map<String, Object> map = new HashMap<String, Object>(); Class<?> cls = obj.getClass(); Field[] beanFields = cls.getDeclaredFields(); for (Field f : beanFields) { String filedName = f.getName(); PropertyDescriptor propertyDescriptor = new PropertyDescriptor(filedName, cls); Object result = propertyDescriptor.getReadMethod().invoke(obj); map.put(filedName, result); } return map; } @SuppressWarnings("unchecked") public static <T> T MapToBean(Map<?, ?> map, Class<T> type) throws Exception { BeanInfo beanInfo = Introspector.getBeanInfo(type); Object obj = type.newInstance(); PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors(); for (int i = 0; i < propertyDescriptors.length; i++) { PropertyDescriptor descriptor = propertyDescriptors[i]; String propertyName = descriptor.getName(); if (map.containsKey(propertyName)) { Object value = map.get(propertyName); Object[] args = new Object[1]; args[0] = value; descriptor.getWriteMethod().invoke(obj, value); } } return (T) obj; } public static Map<String, Object> FieldsToMap( Class<?> type) throws Exception{ if(type == null){ return null; } Map<String, Object> map = new HashMap<String, Object>(); Object obj = type.newInstance(); Field[] beanFields = type.getDeclaredFields(); for (Field f : beanFields) { String filedName = f.getName(); PropertyDescriptor propertyDescriptor = new PropertyDescriptor(filedName, type); Object result = propertyDescriptor.getReadMethod().invoke(obj); map.put(filedName, result); } return map; } }