BeanCopyUtil

package com.rscode.credits.util;

import java.util.HashSet;
import java.util.Set;

import org.springframework.beans.BeanUtils; 
import org.springframework.beans.BeanWrapper; 
import org.springframework.beans.BeanWrapperImpl;
/** 
* @author 作者 tn 
* @version 创建时间：2018年11月13日 
* 类说明   复制bean
*/
public class BeanCopyUtil {
    //source中的非空属性复制到target中
    /**
     * 
     * @param source 源
     * @param target 目标
     */
    public static <T> void beanCopy(T source, T target) { 
        BeanUtils.copyProperties(source, target, getNullPropertyNames(source)); 
    } 
    //source中的非空属性复制到target中，但是忽略指定的属性，也就是说有些属性是不可修改的（个人业务需要） 
    public static <T> void beanCopyWithIngore(T source, T target, String... ignoreProperties) { 
        String[] pns = getNullAndIgnorePropertyNames(source, ignoreProperties); 
        BeanUtils.copyProperties(source, target, pns); 
    }
    public static String[] getNullAndIgnorePropertyNames(Object source, String... ignoreProperties) {
        Set<String> emptyNames = getNullPropertyNameSet(source); 
        for (String s : ignoreProperties) { 
            emptyNames.add(s); 
        } 
        String[] result = new String[emptyNames.size()]; 
        return emptyNames.toArray(result); 
    } 
    public static String[] getNullPropertyNames(Object source) { 
        Set<String> emptyNames = getNullPropertyNameSet(source); 
        String[] result = new String[emptyNames.size()]; 
        return emptyNames.toArray(result); 
    } 
    public static Set<String> getNullPropertyNameSet(Object source) { 
        final BeanWrapper src = new BeanWrapperImpl(source); 
        java.beans.PropertyDescriptor[] pds = src.getPropertyDescriptors(); 
        Set<String> emptyNames = new HashSet<>(); 
        for (java.beans.PropertyDescriptor pd : pds) { 
        Object srcValue = src.getPropertyValue(pd.getName()); 
        if (srcValue == null) emptyNames.add(pd.getName()); 
        } 
        return emptyNames; 
    }
}