利用commons.BeanUtils实现Obj和Map之间转换,这种是最简单,也是最经常用的
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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); } |
利用java reflect完成Obj和Map之间的相互转换
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public Map<String,Object> Obj2Map(Object obj) throws Exception{ Map<String,Object> map= new HashMap<String, Object>(); Field[] fields = obj.getClass().getDeclaredFields(); for (Field field:fields){ field.setAccessible( true ); map.put(field.getName(), field.get(obj)); } return map; } public Object map2Obj(Map<String,Object> map,Class<?> clz) throws Exception{ Object obj = clz.newInstance(); Field[] declaredFields = obj.getClass().getDeclaredFields(); for (Field field:declaredFields){ int mod = field.getModifiers(); if (Modifier.isStatic(mod) || Modifier.isFinal(mod)){ continue ; } field.setAccessible( true ); field.set(obj, map.get(field.getName())); } return obj; } |
利用Introspector完成Obj和Map之间的相互转换
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public Map<String,Object> obj2Map(Object obj) throws Exception{ Map<String,Object> map= new HashMap<String, Object>(); 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; } public Object map2Obj(Map<String,Object> map,Class<?> clz) throws Exception{ if (map == null ) return null ; Object obj = clz.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; } |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:http://www.cnblogs.com/gyjx2016/p/6078210.html