如何获取Arraylist中的Hashmap值

ArrayList<HashMap<String, Object>> arrayList = new ArrayList<>();

HashMap<String, Object> hashMap1 = new HashMap<>();
hashMap1.put("key1", "value1");
hashMap1.put("key2", "value2");
arrayList.add(hashMap1);

HashMap<String, Object> hashMap2 = new HashMap<>();
hashMap2.put("key3", "value3");
hashMap2.put("key4", "value4");
arrayList.add(hashMap2);

HashMap<String, Object> firstHashMap = arrayList.get(0);
String value1 = (String) firstHashMap.get("key1");
String value2 = (String) firstHashMap.get("key2");

HashMap<String, Object> secondHashMap = arrayList.get(1);
String value3 = (String) secondHashMap.get("key3");
String value4 = (String) secondHashMap.get("key4");

for (HashMap<String, Object> hashMap : arrayList) {
    String value1 = (String) hashMap.get("key1");
    String value2 = (String) hashMap.get("key2");
    // 处理获取到的值
}