JavaBean和Map相互转换

最新推荐文章于 2025-06-23 16:40:09 发布

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#javabean转map #map转javabean

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本文详细介绍如何使用Java反射机制将Java Bean转换为Map，并利用Apache Commons BeanUtils库实现Bean与Map之间的相互转换。通过具体代码示例，展示了一种高效、简洁的转换方法，适用于各种Java应用开发场景。

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Jdk bean转map

import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.beans.Transient;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

public class Tools {

    public static Map<String, Object> beanToMap(Object obj) {
        try {
            Map<String, Object> map = new HashMap();
            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();
                Transient annotation = getter.getAnnotation(Transient.class);
                if (annotation == null) {
                    Object value = getter != null ? getter.invoke(obj) : null;
                    map.put(key, value);
                }
            }
            return map;
        } catch (IntrospectionException | IllegalAccessException | InvocationTargetException e) {
            throw new IllegalArgumentException(e.getMessage());
        }
    }
}

apache bean和map互转

import org.apache.commons.beanutils.BeanUtils;

private Map beanToMap(Object obj) {
	try {
		return BeanUtils.describe(obj);
	} catch (IllegalAccessException | InvocationTargetException
			| NoSuchMethodException e) {
		e.printStackTrace();
	}
	return null;
}

private List<?> mapToBean(List<Map<String, Object>> data, Class<?> clazz) {
	List<Object> list = new ArrayList<>();
	try {
		for (int i = 0; i < data.size(); i++) {
			Object newInstance = clazz.newInstance();
			Map<String, Object> map = data.get(i);
			BeanUtils.populate(newInstance, map);
			list.add(newInstance);
		}
		return list;
	} catch (Exception e) {
	}
	return null;
}