利用apache 的PropertyUtilsBean 實現map和pojo相互轉換

import org.apache.commons.beanutils.PropertyUtilsBean;

import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;

/**
 * @author liyhu
 * @date 2019年08月27日
 */
public class ReflectUtil {
    public static <T>T mapToProperties(Map<String,Object> map,Class<T> tClass) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException, InstantiationException {
        T t = tClass.newInstance();
        PropertyUtilsBean propertyUtilsBean = new PropertyUtilsBean();
        PropertyDescriptor[] descriptors = propertyUtilsBean.getPropertyDescriptors(t);
        for (PropertyDescriptor descriptor : descriptors) {
            String name = descriptor.getName();
            if("class".equals(name)){
                continue;
            }
            Object val = map.get(name);
            if(val != null){
                propertyUtilsBean.setProperty(t,name,val);
            }
        }
        return t;
    }
    public static Map<String,Object> commonBeanToMap(Object obj) throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
        PropertyUtilsBean propertyUtilsBean = new PropertyUtilsBean();
        PropertyDescriptor[] descriptors = propertyUtilsBean.getPropertyDescriptors(obj);
        Map<String,Object> resultMap=new HashMap<>(descriptors.length);
        for (PropertyDescriptor descriptor : descriptors) {
            String name = descriptor.getName();
            if("class".equals(name)){
                continue;
            }
            Object val = propertyUtilsBean.getNestedProperty(obj, name);
            if(val != null){
                resultMap.put(name,val);
            }
        }
        return resultMap;
    }



}