JSONObject put accumulate element 方法区别

JSONObject 几个方法的区别

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public Object?put?(Object key, Object value) 将value映射到key下。如果此JSONObject对象之前存在一个value在这个key下，当前的value会替换掉之前的value
Associates the specified value with the specified key in this map(optional operation). If the map previously contained . a mapping for this key, the old value is replaced by the specified value. (A map?m?is said to contain a mapping for a key?k?if and only if m.containsKey(k) would return?true?.))

public JSONObject?accumulate?(String key, Object value) 累积value到这个key下。这个方法同element()方法类似，特殊的是，如果当前已经存在一个value在这个key下那么一个JSONArray将会存储在这个key下来保存所有累积的value。如果已经存在一个JSONArray，那么当前的value就会添加到这个JSONArray中
。相比之下replace方法会替代先前的value
Accumulate values under a key. It is similar to the element method except that if there is already an object stored?
under the key then a JSONArray is stored under the key to hold all of the accumulated values. If there is already a?
JSONArray, then the new value is appended to it. In contrast, the replace method replaces the previous value.

public JSONObject?element?(String key, Object value) 将键/值对放到这个JSONObject对象里面。如果当前value为空(null)，那么如果这个key存在的话，这个key就会移除掉。如果这
个key之前有value值，那么此方法会调用accumulate()方法。
Put a key/value pair in the JSONObject. If the value is null, then the key will be removed from the JSONObject if it is?
present. If there is a previous value assigned to the key, it will call accumulate.

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转自?http://blog.csdn.net/cocodehouse/article/details/5996088?，保存这这里方便下次查看

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