net.unmz.java.util.map.MapUtils Maven / Gradle / Ivy
package net.unmz.java.util.map;
import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
/**
* Project Name: 常用工具类集合
* 功能描述：Map工具箱
*
* @author [email protected]
* @version 1.0
* @date 2017-12-12 11:14
* @since JDK 1.8
*/
public class MapUtils {
/**
* @param obj
* @return
* @throws Exception
*/
public static Map objectToMap(Object obj) throws Exception {
if(null != obj) {
Map 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();
String value = getter!=null ? getter.invoke(obj).toString() : null;
map.put(key, value);
}
return map;
} else {
return null;
}
}
/**
* @param map
* @param beanClass
* @return
* @throws Exception
*/
public static Object mapToObject(Map map, Class beanClass) throws Exception {
if (null != map) {
return null;
}
Object obj = beanClass.newInstance();
BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
for (PropertyDescriptor property : propertyDescriptors) {
Method setter = property.getWriteMethod();
if (setter != null) {
setter.invoke(obj, map.get(property.getName()));
}
}
return obj;
}
}