java 使用BeanInfo实现bean实体与map之间的互相转换。
BeanInfo接口提供有关其 bean 的显式信息的 bean 实现者可以提供某个 BeanInfo 类，该类实现此 BeanInfo 接口并提供有关其 bean 的方法、属性、事件等显式信息。
例子：
map转实体
/**
* @param map
* @return
* @throws IllegalAccessException
* @throws IllegalArgumentException
* @throws InvocationTargetException
* @throws IntrospectionException
*/
private User mapTransformToBean(Map<String, Object> map) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, IntrospectionException{
User user=new User();
BeanInfo beanInfo = Introspector.getBeanInfo(user.getClass());
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
for (PropertyDescriptor property : propertyDescriptors) {
String key = property.getName();
if (map.containsKey(key)) {
Object value = map.get(key);
//得到property对应的setter方法
Method setter = property.getWriteMethod();
setter.invoke(user, value);
}
}
return user;
}
实体转map
/**
* @param user
* @return
* @throws IllegalAccessException
* @throws IllegalArgumentException
* @throws InvocationTargetException
* @throws IntrospectionException
*/
private Map<String, Object> beanTransformToMap(User user) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, IntrospectionException{
Map<String, Object> map = new HashMap<String, Object>();
BeanInfo beanInfo = Introspector.getBeanInfo(user.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(user);
map.put(key, value);
}
}
return map;
}
java 可以使用BeanInfo实现bean实体与map之间的互相转换
原文：https://www.cnblogs.com/talkjd-04/p/10868471.html