package com.consum.base.core.utils;
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import cn.hutool.core.util.ReflectUtil;
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import lombok.extern.slf4j.Slf4j;
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import java.lang.reflect.Field;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.Map;
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@Slf4j
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public class MapUtils {
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public static final char UNDERLINE = '_';
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/**
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* 把map转换成对象
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*
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* @param map
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* @param clazz
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* @param <T>
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* @return
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*/
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public static <T> T convertMapToObj(Map<String, Object> map, Class<T> clazz) {
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try {
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T obj = clazz.newInstance();
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for (Map.Entry<String, Object> entry : map.entrySet()) {
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Field field = clazz.getDeclaredField(entry.getKey());
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// field.setAccessible(true);
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// field.set(obj, entry.getValue());
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ReflectUtil.setFieldValue(obj, field, entry.getValue());
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}
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return obj;
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} catch (InstantiationException | IllegalAccessException | NoSuchFieldException e) {
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log.error(e.getMessage(), e);
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}
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return null;
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}
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/**
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* 把map的key转换成驼峰命名
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*
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* @param map
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* @return
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*/
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public static Map<String, Object> toReplaceKeyLow(Map<String, Object> map) {
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Map reMap = new HashMap();
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if (map != null) {
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Iterator var2 = map.entrySet().iterator();
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while (var2.hasNext()) {
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Map.Entry<String, Object> entry = (Map.Entry) var2.next();
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reMap.put(underlineToCamel(entry.getKey()), map.get(entry.getKey()));
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}
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map.clear();
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}
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return reMap;
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}
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/**
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* 将下划线转为驼峰格式
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*
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* @param param
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* @return
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*/
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public static String underlineToCamel(String param) {
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if (param == null || "".equals(param.trim())) {
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return "";
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}
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int len = param.length();
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StringBuilder sb = new StringBuilder(len);
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for (int i = 0; i < len; i++) {
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char c = param.charAt(i);
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if (c == UNDERLINE) {
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if (++i < len) {
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sb.append(Character.toUpperCase(param.charAt(i)));
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}
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} else {
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sb.append(Character.toLowerCase(param.charAt(i)));
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}
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}
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return sb.toString();
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}
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}
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