打印ArrayList<HashMap>

ArrayList<HashMap<String, Object>> arrayList = new ArrayList<>(); // 创建一个ArrayList对象

HashMap<String, Object> hashMap1 = new HashMap<>(); // 创建第一个HashMap对象
hashMap1.put("key1", "value1");
hashMap1.put("key2", "value2");
arrayList.add(hashMap1); // 将第一个HashMap对象添加到ArrayList中

HashMap<String, Object> hashMap2 = new HashMap<>(); // 创建第二个HashMap对象
hashMap2.put("key3", "value3");
hashMap2.put("key4", "value4");
arrayList.add(hashMap2); // 将第二个HashMap对象添加到ArrayList中

for (HashMap<String, Object> hashMap : arrayList) {
    for (Map.Entry<String, Object> entry : hashMap.entrySet()) {
        String key = entry.getKey();
        Object value = entry.getValue();
        System.out.println("Key: " + key + ", Value: " + value);
    }
}

Key: key1, Value: value1
Key: key2, Value: value2
Key: key3, Value: value3
Key: key4, Value: value4