实用Map工具类

实用Map工具类

package com.mdl.monitor.util;import java.util.HashMap;import java.util.LinkedHashMap;import java.util.Map;import java.util.TreeMap;/** * 方便操作map */public class MapUtils {    public static MapBuilder<String, String> build() {        return build(String.class, String.class);    }    public static <K, V> MapBuilder<K, V> build(Class<K> keyType, Class<V> valueType) {        MapBuilder<K, V> mapBuilder = new MapBuilder<K, V>();        return mapBuilder;    }    public static class MapBuilder<K, V> {        private LinkedHashMap<K, V> cache = new LinkedHashMap<K, V>();        public MapBuilder<K, V> add(K key, V value) {            cache.put(key, value);            return this;        }        public MapBuilder<K, V> addAll(Map<K, V> map) {            if (map != null) {                cache.putAll(map);            }            return this;        }        public HashMap<K, V> toHashMap() {            HashMap<K, V> map = new HashMap<K, V>();            map.putAll(cache);            return map;        }        public TreeMap<K, V> toTreeMap() {            TreeMap<K, V> map = new TreeMap<K, V>();            map.putAll(cache);            return map;        }        public LinkedHashMap<K, V> toLinkedHashMap() {            LinkedHashMap<K, V> map = new LinkedHashMap<K, V>();            map.putAll(cache);            return map;        }    }   }

使用：

MapUtils.build().add(param1, param2).toHashMap()