涉及内容:
Java反射机制:https://blog.csdn.net/sinat_38259539/article/details/71799078
JavaBean规范:https://blog.csdn.net/zdwzzu2006/article/details/5151788/
Java内省机制:https://blog.csdn.net/hahalzb/article/details/5972421
package com.passer.introspector; import java.beans.BeanInfo; import java.beans.Introspector; import java.beans.PropertyDescriptor; import java.util.HashMap; import java.util.Map; import java.util.Map.Entry; public class BeanUtils { public static void main(String []args) throws Exception { User user=new User(); user.setName("passer"); user.setDescri("cool"); Map<Object,Object> map=bean2map(user); System.out.println(map); Object obj=map2bean(map,User.class); System.out.println(obj); } private static <T> T map2bean(Map<Object,Object> map,Class<T> beanType) throws Exception { T t=beanType.newInstance(); PropertyDescriptor [] pds=Introspector.getBeanInfo(beanType,Object.class) .getPropertyDescriptors(); for (PropertyDescriptor pd : pds) { for (Entry entry : map.entrySet()) { if(entry.getKey().equals(pd.getName())) { pd.getWriteMethod().invoke(t, entry.getValue()); } } } return t; } private static Map<Object,Object> bean2map(Object bean) throws Exception { Map<Object,Object> map=new HashMap<>(); BeanInfo info=Introspector.getBeanInfo(bean.getClass(),Object.class); PropertyDescriptor []pds=info.getPropertyDescriptors(); for(PropertyDescriptor pd:pds) { Object key=pd.getName(); Object value= pd.getReadMethod().invoke(bean); map.put(key, value); } return map; } }