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* 将无序Map转换成有序Map * @explain 将参数按照第一个字符的键值 ASCII 码递增排序(字母升序排序),如果遇到相同字符则按照第二个字符的键值 ASCII 码递增排序, * 以此类推通过SortedMap可以实现 * @param paramsMap * @return Map 按ASCII码升序排列 public static Map<String, Object> toSortedMap(Map<String, Object> paramsMap) { // 用于存储接收到的key:value,并按key以ASCII码进行升序排列组合 SortedMap<String, Object> data = new TreeMap<String, Object> (); // 获取Map对象中的键值对对象 Set<Entry<String, Object>> entrySet = paramsMap.entrySet(); Entry <String, Object> entry = null ; String key = "" ; Object value = null ; // 遍历paramsMap数据,添加到SortedMap对象 for (Iterator<Entry<String, Object>> iterator = entrySet.iterator(); iterator.hasNext();) { entry = iterator.next(); key = entry.getKey(); value = entry.getValue(); data.put(key, value); log.info( "Map-->SortedMap:" + data); return data;

3.将map的value转化成String类型

* Map<String, Object>-->Map<String, String> * @explain 前提:value必须为String类型 *
@param paramsMap * @return * @throws Exception public static Map<String, String> toStringMap(Map<String, Object> paramsMap) throws Exception{ Map <String, String> data = new HashMap<String, String> (); // 获取Map对象中的键值对对象 Set<Entry<String, Object>> entrySet = paramsMap.entrySet(); Entry <String, Object> entry = null ; String key = "" ; String value = null ; for (Iterator<Entry<String, Object>> iterator = entrySet.iterator(); iterator.hasNext();) { entry = iterator.next(); key = entry.getKey(); if (key instanceof String) { value = (String) entry.getValue(); data.put(key, value); } else { log.error( "Map中含有非String类型的值,对应的key=" + key); throw new Exception("Map中含有非String类型的值,对应的key=" + key); log.info( "Map<String, Object>-->Map<String, String>:" + data); return data;

4.将map的value转化成Object类型

* Map<String, String>-->Map<String, Object> * @explain 将value转换成Object类型 *
@param paramsMap * @return public static Map<String, Object> toObjectMap(Map<String, String> paramsMap){ Map <String, Object> data = new HashMap<String, Object> (); // 获取Map对象中的键值对对象 Set<Entry<String, String>> entrySet = paramsMap.entrySet(); Entry <String, String> entry = null ; String key = "" ; Object value = null ; for (Iterator<Entry<String, String>> iterator = entrySet.iterator(); iterator.hasNext();) { entry = iterator.next(); key = entry.getKey(); value = entry.getValue(); data.put(key, value); log.info( "Map<String, String>-->Map<String, Object>:" + data); return data;

5.将map的key小写转换成大写

* key 小写-->大写 * @explain 将key改为大写 *
@param paramsMap * @return public static Map<String, Object> toUpperMap(Map<String, Object> paramsMap){ Map <String, Object> data = new HashMap<String, Object> (); // 获取Map对象中的键值对对象 Set<Entry<String, Object>> entrySet = paramsMap.entrySet(); Entry <String, Object> entry = null ; String key = "" ; Object value = null ; for (Iterator<Entry<String, Object>> iterator = entrySet.iterator(); iterator.hasNext();) { entry = iterator.next(); key = entry.getKey().toUpperCase(); value = entry.getValue(); data.put(key, value); log.info( "Map 小写-->大写:" + data); return data;

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