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  • Javabean与map互转


    import
    java.beans.BeanInfo; import java.beans.IntrospectionException; import java.beans.Introspector; import java.beans.PropertyDescriptor; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.HashMap; import java.util.Map; /** * JavaBean and map converter. * * */ public final class BeanMapUtils { /** * Converts a map to a JavaBean. * * @param type type to convert * @param map map to convert * @return JavaBean converted * @throws IntrospectionException failed to get class fields * @throws IllegalAccessException failed to instant JavaBean * @throws InstantiationException failed to instant JavaBean * @throws InvocationTargetException failed to call setters */ public static final Object toBean(Class<?> type, Map<String, ? extends Object> map) throws IntrospectionException, IllegalAccessException, InstantiationException, InvocationTargetException { BeanInfo beanInfo = Introspector.getBeanInfo(type); Object obj = type.newInstance(); PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors(); for (int i = 0; i< propertyDescriptors.length; i++) { PropertyDescriptor descriptor = propertyDescriptors[i]; String propertyName = descriptor.getName(); if (map.containsKey(propertyName)) { Object value = map.get(propertyName); Object[] args = new Object[1]; args[0] = value; descriptor.getWriteMethod().invoke(obj, args); } } return obj; } /** * Converts a JavaBean to a map * * @param bean JavaBean to convert * @return map converted * @throws IntrospectionException failed to get class fields * @throws IllegalAccessException failed to instant JavaBean * @throws InvocationTargetException failed to call setters */ public static final Map<String, Object> toMap(Object bean) throws IntrospectionException, IllegalAccessException, InvocationTargetException { Map<String, Object> returnMap = new HashMap<String, Object>(); BeanInfo beanInfo = Introspector.getBeanInfo(bean.getClass()); PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors(); for (int i = 0; i< propertyDescriptors.length; i++) { PropertyDescriptor descriptor = propertyDescriptors[i]; String propertyName = descriptor.getName(); if (!propertyName.equals("class")) { Method readMethod = descriptor.getReadMethod(); Object result = readMethod.invoke(bean, new Object[0]); if (result != null) { returnMap.put(propertyName, result); } else { returnMap.put(propertyName, ""); } } } return returnMap; } }

    原文链接:http://blog.csdn.net/miqi770/article/details/17448929

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  • 原文地址:https://www.cnblogs.com/jack1995/p/7778284.html
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