public class JavaBeanUtil { private static Logger logger = LoggerFactory.getLogger(JavaBeanUtil.class); /** * 实体类转map * @param obj * @return */ public static Map<String, Object> convertBeanToMap(Object obj) { if (obj == null) { return null; } Map<String, Object> map = new HashMap<String, Object>(); 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); if(null==value){ map.put(key,""); }else{ map.put(key,value); } } } } catch (Exception e) { logger.error("convertBean2Map Error {}" ,e); } return map; } /** * map 转实体类 * @param clazz * @param map * @param <T> * @return */ public static <T> T convertMapToBean(Class<T> clazz, Map<String,Object> map) { T obj = null; try { BeanInfo beanInfo = Introspector.getBeanInfo(clazz); obj = clazz.newInstance(); // 创建 JavaBean 对象 // 给 JavaBean 对象的属性赋值 PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors(); for (int i = 0; i < propertyDescriptors.length; i++) { PropertyDescriptor descriptor = propertyDescriptors[i]; String propertyName = descriptor.getName(); if (map.containsKey(propertyName)) { // 下面一句可以 try 起来，这样当一个属性赋值失败的时候就不会影响其他属性赋值。 Object value = map.get(propertyName); if ("".equals(value)) { value = null; } Object[] args = new Object[1]; args[0] = value; descriptor.getWriteMethod().invoke(obj, args); } } } catch (IllegalAccessException e) { logger.error("convertMapToBean 实例化JavaBean失败 Error{}" ,e); } catch (IntrospectionException e) { logger.error("convertMapToBean 分析类属性失败 Error{}" ,e); } catch (IllegalArgumentException e) { logger.error("convertMapToBean 映射错误 Error{}" ,e); } catch (InstantiationException e) { logger.error("convertMapToBean 实例化 JavaBean 失败 Error{}" ,e); }catch (InvocationTargetException e){ logger.error("convertMapToBean字段映射失败 Error{}" ,e); }catch (Exception e){ logger.error("convertMapToBean Error{}" ,e); } return (T) obj; }}
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