java 属性拷贝工具类

来源：互联网发布：网络传奇游戏排行榜编辑：程序博客网时间：2024/06/11 21:02
import java.lang.reflect.Method;import java.util.Arrays;import java.util.Collection;import java.util.List;   /**       * 属性拷贝的 工具类 * @author zhangtengda         * @version 1.0       * @created 2015年6月10日 上午11:06:22      */       public class PropertyCopy {/** * 利用反射实现对象之间属性复制 * @param from * @param to */public static void copyProperties(Object from, Object to) throws Exception {copyPropertiesExclude(from, to, null);}/** * 复制对象属性 * @param from * @param to * @param excludsArray 排除属性列表 * @throws Exception */@SuppressWarnings("unchecked")public static void copyPropertiesExclude(Object from, Object to, String[] excludsArray) throws Exception {List<String> excludesList = null;if(excludsArray != null && excludsArray.length > 0) {excludesList = Arrays.asList(excludsArray);//构造列表对象}Method[] fromMethods = from.getClass().getDeclaredMethods();Method[] toMethods = to.getClass().getDeclaredMethods();Method fromMethod = null, toMethod = null;String fromMethodName = null, toMethodName = null;for (int i = 0; i < fromMethods.length; i++) {fromMethod = fromMethods[i];fromMethodName = fromMethod.getName();if (!fromMethodName.contains("get"))continue;//排除列表检测if(excludesList != null && excludesList.contains(fromMethodName.substring(3).toLowerCase())) {continue;}toMethodName = "set" + fromMethodName.substring(3);toMethod = findMethodByName(toMethods, toMethodName);if (toMethod == null)continue;Object value = fromMethod.invoke(from, new Object[0]);if(value == null)continue;//集合类判空处理if(value instanceof Collection) {Collection newValue = (Collection)value;if(newValue.size() <= 0)continue;}toMethod.invoke(to, new Object[] {value});}}/** * 对象属性值复制，仅复制指定名称的属性值 * @param from * @param to * @param includsArray * @throws Exception */@SuppressWarnings("unchecked")public static void copyPropertiesInclude(Object from, Object to, String[] includsArray) throws Exception {List<String> includesList = null;if(includsArray != null && includsArray.length > 0) {includesList = Arrays.asList(includsArray);//构造列表对象} else {return;}Method[] fromMethods = from.getClass().getDeclaredMethods();Method[] toMethods = to.getClass().getDeclaredMethods();Method fromMethod = null, toMethod = null;String fromMethodName = null, toMethodName = null;for (int i = 0; i < fromMethods.length; i++) {fromMethod = fromMethods[i];fromMethodName = fromMethod.getName();if (!fromMethodName.contains("get"))continue;//排除列表检测String str = fromMethodName.substring(3);if(!includesList.contains(str.substring(0,1).toLowerCase() + str.substring(1))) {continue;}toMethodName = "set" + fromMethodName.substring(3);toMethod = findMethodByName(toMethods, toMethodName);if (toMethod == null)continue;Object value = fromMethod.invoke(from, new Object[0]);if(value == null)continue;//集合类判空处理if(value instanceof Collection) {Collection newValue = (Collection)value;if(newValue.size() <= 0)continue;}toMethod.invoke(to, new Object[] {value});}}/** * 从方法数组中获取指定名称的方法 *  * @param methods * @param name * @return */public static Method findMethodByName(Method[] methods, String name) {for (int j = 0; j < methods.length; j++) {if (methods[j].getName().equals(name))return methods[j];}return null;}}
0 0