实例如下：

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工具类 * * @author jqlin */public class MapUtils { /** * 从map集合中获取属性值 * * @param <E> * @param map * map集合 * @param key * 键对 * @param defaultValue * 默认值 * @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集合对象转化成 JavaBean集合对象 * * @param javaBean JavaBean实例对象 * @param mapList Map数据集对象 * @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对象转化成 JavaBean对象 * * @param javaBean JavaBean实例对象 * @param map Map对象 * @return * @author jqlin */ @SuppressWarnings({ "rawtypes","unchecked", "hiding" }) public static <T> T map2Java(T javaBean, Map map) { try { // 获取javaBean属性 BeanInfo beanInfo = Introspector.getBeanInfo(javaBean.getClass()); // 创建 JavaBean 对象 Object obj = javaBean.getClass().newInstance(); PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors(); if (propertyDescriptors != null && propertyDescriptors.length > 0) { String propertyName = null; // javaBean属性名 Object propertyValue = null; // javaBean属性值 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对象转化成Map对象 * * @param javaBean * @return * @author jqlin */ @SuppressWarnings({ "rawtypes", "unchecked" }) public static Map java2Map(Object javaBean) { Map map = new HashMap(); try { // 获取javaBean属性 BeanInfo beanInfo = Introspector.getBeanInfo(javaBean.getClass()); PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors(); if (propertyDescriptors != null && propertyDescriptors.length > 0) { String propertyName = null; // javaBean属性名 Object propertyValue = null; // javaBean属性值 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; } }

以上就是小编为大家带来的JavaBean和Map转换封装类的方法全部内容了，希望大家多多支持~