實例如下：
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package com.ljq.util;import java.beans.BeanInfo;import java.beans.Introspector;import java.beans.PropertyDescriptor;import java.lang.reflect.Method;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;/** * Map工具類 * * @author jqlin */public class MapUtils { /** * 從map集合中獲取屬性值 * * @param <E> * @param map * map集合 * @param key * 鍵對 * @param defaultValue * 默認(rèn)值 * @return * @author jiqinlin */ @SuppressWarnings({ "unchecked", "rawtypes" }) public final static <E> E get(Map map, Object key, E defaultValue) { Object o = map.get(key); if (o == null) return defaultValue; return (E) o; } /** * Map集合對象轉(zhuǎn)化成 JavaBean集合對象 * * @param javaBean JavaBean實例對象 * @param mapList Map數(shù)據(jù)集對象 * @return * @author jqlin */ @SuppressWarnings({ "rawtypes" }) public static <T> List<T> map2Java(T javaBean, List<Map> mapList) { if(mapList == null || mapList.isEmpty()){ return null; } List<T> objectList = new ArrayList<T>(); T object = null; for(Map map : mapList){ if(map != null){ object = map2Java(javaBean, map); objectList.add(object); } } return objectList; } /** * Map對象轉(zhuǎn)化成 JavaBean對象 * * @param javaBean JavaBean實例對象 * @param map Map對象 * @return * @author jqlin */ @SuppressWarnings({ "rawtypes","unchecked", "hiding" }) public static <T> T map2Java(T javaBean, Map map) { try { // 獲取javaBean屬性 BeanInfo beanInfo = Introspector.getBeanInfo(javaBean.getClass()); // 創(chuàng)建 JavaBean 對象 Object obj = javaBean.getClass().newInstance(); PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors(); if (propertyDescriptors != null && propertyDescriptors.length > 0) { String propertyName = null; // javaBean屬性名 Object propertyValue = null; // javaBean屬性值 for (PropertyDescriptor pd : propertyDescriptors) { propertyName = pd.getName(); if (map.containsKey(propertyName)) { propertyValue = map.get(propertyName); pd.getWriteMethod().invoke(obj, new Object[] { propertyValue }); } } return (T) obj; } } catch (Exception e) { e.printStackTrace(); } return null; } /** * JavaBean對象轉(zhuǎn)化成Map對象 * * @param javaBean * @return * @author jqlin */ @SuppressWarnings({ "rawtypes", "unchecked" }) public static Map java2Map(Object javaBean) { Map map = new HashMap(); try { // 獲取javaBean屬性 BeanInfo beanInfo = Introspector.getBeanInfo(javaBean.getClass()); PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors(); if (propertyDescriptors != null && propertyDescriptors.length > 0) { String propertyName = null; // javaBean屬性名 Object propertyValue = null; // javaBean屬性值 for (PropertyDescriptor pd : propertyDescriptors) { propertyName = pd.getName(); if (!propertyName.equals("class")) { Method readMethod = pd.getReadMethod(); propertyValue = readMethod.invoke(javaBean, new Object[0]); map.put(propertyName, propertyValue); } } } } catch (Exception e) { e.printStackTrace(); } return map; } } |
以上就是小編為大家?guī)淼腏avaBean和Map轉(zhuǎn)換封裝類的方法全部內(nèi)容了，希望大家多多支持服務(wù)器之家~
