java 将对象属性值快速复制到另一个对象上

需求：将对象属性值快速复制到另一个对象上，忽略空值属性和id

直接上代码：BeanUtils 工具类

注意：如果需要关注复制性能的话，推荐用插件https://blog.youkuaiyun.com/qiaodaima0/article/details/126240532?spm=1001.2014.3001.5501

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.springframework.beans.BeanWrapper;
import org.springframework.beans.BeanWrapperImpl;
import cn.newi.common.util.StringUtil;

public class BeanUtils {
	/**
	 * 拷贝bean中的属性
	 * @param source
	 * @param target
	 * @param ignores
	 */
	public static void copyProperties(Object source, Object target, String... ignores){
		org.springframework.beans.BeanUtils.copyProperties(source, target, ignores);
	}
	/**
	 * 拷贝bean中的属性 忽略掉空值属性和ID属性
	 * @param source
	 * @param target
	 */
	public static void copyPropertiesIgnoreNullValueAndId(Object source, Object target){
		copyProperties(source, target, getNullPropertyNamesAndIgnoreNames(source, "id"));
	}
	/**
	 * 拷贝bean中的属性 忽略掉空值属性
	 * @param source
	 * @param target
	 */
	public static void copyPropertiesIgnoreNullValue(Object source, Object target){
		copyProperties(source, target, getNullPropertyNamesAndIgnoreNames(source));
	}
	/**
	 * 获取空值属性名称或者忽略
	 * @param source
	 * @param ignores
	 * @return
	 */
	public static String[] getNullPropertyNamesAndIgnoreNames (Object source, String... ignores ) {
		final BeanWrapper src = new BeanWrapperImpl(source);
		java.beans.PropertyDescriptor[] pds = src.getPropertyDescriptors();

		Set<String> emptyNames = new HashSet<String>();
		if (ignores != null && ignores.length > 0){
			emptyNames.addAll(Arrays.asList(ignores));
		}
		for(java.beans.PropertyDescriptor pd : pds) {
			Object srcValue = src.getPropertyValue(pd.getName());
			if (srcValue == null) emptyNames.add(pd.getName());
		}
		String[] result = new String[emptyNames.size()];
		return emptyNames.toArray(result);
	}
	
	public static String[] convertStringToArray(String ids){
		if (StringUtil.isEmpty(ids)){
			return null;
		}
		return ids.split(",");
	}
	/**
	 * 分解URL协议、host、端口、path等参数
	 * "http://www.baidu.com:8080/1223/sdfsd?abc=rer";
	 * 	String protocol = "";
		String host = "";
		String port = "";
		String path = "";
		["http","www.baidu.com","8080","/1223/sdfsd?abc=rer"]
	 * @param url
	 * @return
	 */
	public static List<String> splitUrlPath(String url){
		if (StringUtil.isEmpty(url)){
			return null;
		}
		url = url.trim();
		String protocol = "";
		String host = "";
		String port = "";
		String path = "";

		List<String> params = new ArrayList<>();
		String[] protocols = url.split("://");
		if (protocols == null || protocols.length != 2){
			return null;
		}
		protocol = protocols[0];
		if (StringUtil.isEmpty(protocols[1])){
			return null;
		}
		if (protocols[1].indexOf(':') < 0){//没有端口号，即80端口
			port = "80";
			String[] hosts = protocols[1].split("/");
			if (hosts == null || hosts.length < 2){
				host = protocols[1];
				path = "";
			} else {
				host = hosts[0];
				path = protocols[1].substring(host.length(), protocols[1].length());
			}
		} else {
			String[] hosts = protocols[1].split(":");
			host = hosts[0];
			String[] ports = hosts[1].split("/");
			port = ports[0];
			path = hosts[1].substring(port.length(), hosts[1].length());
		}
		params.add(protocol);
		params.add(host);
		params.add(port);
		params.add(path);
		return params;
	}
}

使用方法：

BeanUtils.copyProperties(被复制对象, 粘贴内容的对象);