packagecom.ljq.util;importjava.beans.BeanInfo;importjava.beans.Introspector;importjava.beans.PropertyDescriptor;importjava.lang.reflect.Method;importjava.util.ArrayList;importjava.util.HashMap;importjava.util.List;importjava.util.Map;/*** Map工具类

*

*@authorjqlin*/

public classMapUtils {/*** 从map集合中获取属性值

*

*@param

*@parammap

* map集合

*@paramkey

* 键对

*@paramdefaultValue

* 默认值

*@return*@authorjiqinlin*/@SuppressWarnings({"unchecked", "rawtypes"})public final static E get(Map map, Object key, E defaultValue) {

Object o=map.get(key);if (o == null)returndefaultValue;return(E) o;

}/*** Map集合对象转化成 JavaBean集合对象

*

*@paramjavaBean JavaBean实例对象

*@parammapList Map数据集对象

*@return*@authorjqlin*/@SuppressWarnings({"rawtypes"})public static List map2Java(T javaBean, ListmapList) {if(mapList == null ||mapList.isEmpty()){return null;

}

List objectList = new ArrayList();

T object= null;for(Map map : mapList){if(map != null){

object=map2Java(javaBean, map);

objectList.add(object);

}

}returnobjectList;

}/*** Map对象转化成 JavaBean对象

*

*@paramjavaBean JavaBean实例对象

*@parammap Map对象

*@return*@authorjqlin*/@SuppressWarnings({"rawtypes","unchecked", "hiding"})public static 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,newObject[] { propertyValue });

}

}return(T) obj;

}

}catch(Exception e) {

e.printStackTrace();

}return null;

}/*** JavaBean对象转化成Map对象

*

*@paramjavaBean

*@return*@authorjqlin*/@SuppressWarnings({"rawtypes", "unchecked"})public staticMap java2Map(Object javaBean) {

Map map= newHashMap();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();

}returnmap;

}

}