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;

    }

}