package com.yiboshi.science.utils; import com.google.common.collect.Lists; import com.google.common.collect.Maps; import org.springframework.beans.BeanUtils; import org.springframework.cglib.beans.BeanMap; import java.util.ArrayList; import java.util.List; import java.util.Map; /** * @author jinheng.li * @date 2018-10-11 16:18 * @Description:对象的基础处理类 */ public class BeanUtil { /** * 将对象装换为map * @param bean * @return */ public static <T> Map<String, Object> beanToMap(T bean) { Map<String, Object> map = Maps.newHashMap(); if (bean != null) { BeanMap beanMap = BeanMap.create(bean); for (Object key : beanMap.keySet()) { map.put(key+"", beanMap.get(key)); } } return map; } /** * 将map装换为javabean对象 * @param map * @param bean * @return */ public static <T> T mapToBean(Map<String, Object> map,T bean) { BeanMap beanMap = BeanMap.create(bean); beanMap.putAll(map); return bean; } /** * 将List<T>转换为List<Map<String, Object>> * @param objList * @return */ public static <T> List<Map<String, Object>> objectsToMaps(List<T> objList) { List<Map<String, Object>> list = Lists.newArrayList(); if (objList != null && objList.size() > 0) { Map<String, Object> map = null; T bean = null; for (int i = 0,size = objList.size(); i < size; i++) { bean = objList.get(i); map = beanToMap(bean); list.add(map); } } return list; } /** * 将List<Map<String,Object>>转换为List<T> * @param maps * @param clazz * @return * @throws InstantiationException * @throws IllegalAccessException */ public static <T> List<T> mapsToObjects(List<Map<String, Object>> maps,Class<T> clazz) throws InstantiationException, IllegalAccessException { List<T> list = Lists.newArrayList(); if (maps != null && maps.size() > 0) { Map<String, Object> map = null; T bean = null; for (int i = 0,size = maps.size(); i < size; i++) { map = maps.get(i); bean = clazz.newInstance(); mapToBean(map, bean); list.add(bean); } } return list; } /** * 拷贝对象属性到目标对象 * <p> * <b>示例</b> * BeanSource bs = new BeanSource(); * bs.set(...); * ... * BeanTarget bt = BeanUtil.copyProperties(bs,BeanTarget.class); * * </p> * * @param sourceObj 源对象 * @param targetClazz 目标类 * @return 目标对象 */ public static <T> T copyProperties(Object sourceObj, Class<T> targetClazz) { return BeanUtil.copyProperties(sourceObj, targetClazz, new String[]{}); } public static <T> T copyProperties(Object sourceObj, Class<T> targetClazz, String... ignoreProperties) { if (sourceObj == null){ return null; } T targetObj = null; try { targetObj = (T) targetClazz.newInstance(); BeanUtils.copyProperties(sourceObj, targetObj, ignoreProperties); } catch (IllegalAccessException e) { throw new RuntimeException(e.getMessage()); } catch (InstantiationException e) { throw new RuntimeException(e.getMessage()); } return targetObj; } /** * 拷贝源列表对象到目标列表 * * @param sourceList 源列表 * @param targetClazz 目标列表元类型 * @return 目标列表 */ public static <T> List<T> copyBeans(List<?> sourceList, Class<T> targetClazz){ return BeanUtil.copyBeans(sourceList, targetClazz, new String[]{}); } public static <T> List<T> copyBeans(List<?> sourceList, Class<T> targetClazz, String... ignoreProperties){ if (sourceList == null) { return null; } List<T> targetList = new ArrayList<T>(); for (Object sourceObj : sourceList) { T targetObj = BeanUtil.copyProperties(sourceObj, targetClazz, ignoreProperties); targetList.add(targetObj); } return targetList; } }