package com.whyc.util;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.commons.beanutils.PropertyUtilsBean;
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import java.beans.PropertyDescriptor;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* @className:ReflectUtil
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* @description:动态生成类的属性、并且赋值
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* @date:2018年4月3日 下午2:33:10
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*/
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@Slf4j
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public class ReflectUtil {
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//static Logger logger = LogManager.getLogger(ReflectUtil.class);
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@SuppressWarnings("rawtypes")
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public static Object getTarget(Object dest, Map<String, Object> addProperties) {
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PropertyUtilsBean propertyUtilsBean = new PropertyUtilsBean();
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PropertyDescriptor[] descriptors = propertyUtilsBean.getPropertyDescriptors(dest);
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Map<String, Class> propertyMap = new HashMap<>();
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for (PropertyDescriptor d : descriptors) {
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if (!"class".equalsIgnoreCase(d.getName())) {
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propertyMap.put(d.getName(), d.getPropertyType());
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}
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}
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// add extra properties
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addProperties.forEach((k, v) -> propertyMap.put(k, v.getClass()));
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// new dynamic bean
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DynamicBean dynamicBean = new DynamicBean(dest.getClass(), propertyMap);
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// add old value
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propertyMap.forEach((k, v) -> {
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try {
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// filter extra properties
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if (!addProperties.containsKey(k)) {
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dynamicBean.setValue(k, propertyUtilsBean.getNestedProperty(dest, k));
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}
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} catch (Exception e) {
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log.error(e.getMessage(), e);
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}
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});
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// add extra value
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addProperties.forEach((k, v) -> {
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try {
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dynamicBean.setValue(k, v);
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} catch (Exception e) {
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log.error(e.getMessage(), e);
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}
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});
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Object target = dynamicBean.getTarget();
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return target;
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}
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/*public static void setProperty(Object obj, String propertyName, Object value)
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throws NoSuchFieldException, SecurityException,
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IllegalArgumentException, IllegalAccessException {
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// 根绝对象获取字节码文件
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Class c = obj.getClass();
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// 获取该对象的propertyName成员变量
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Field field = c.getDeclaredField(propertyName); //注意你是通过参数来获取，不许加双引号“”
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// 取消访问检查
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field.setAccessible(true);
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// 给对象的成员变量赋值为指定的值--->value
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field.set(obj, value);
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}
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public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
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BattDataDTO entity = new BattDataDTO();
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ReflectUtil.setProperty(entity,"time","hehe");
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Map<String, Object> addProperties = new HashMap<>();
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addProperties.put("day31", "你好");
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Object obj = getTarget(entity, addProperties);
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String s = ActionUtil.getGson().toJson(obj);
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System.out.println(s);
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}*/
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}
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