JavaBean和Map相互转换-蒲公英云

JavaBean和Map相互转换

你的名字 2022-05-11 05:52 305阅读 0赞

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;
}