java中根据相同数据合并

Map<String, Integer> mergedData = new HashMap<>();

for (String key : originalData.keySet()) {
    int value = originalData.get(key);
    if (mergedData.containsKey(key)) {
        int mergedValue = mergedData.get(key) + value;
        mergedData.put(key, mergedValue);
    } else {
        mergedData.put(key, value);
    }
}

for (String key : mergedData.keySet()) {
    int value = mergedData.get(key);
    System.out.println(key + ": " + value);
}