前些天發現了一個巨牛的人工智能學習網站，通俗易懂，風趣幽默，忍不住分享一下給大家。點擊跳轉到教程。

1. 錯誤的代碼寫法：

 @Autowiredprivate ElasticsearchOperations esOperations; public void updateAxxxData(List<AxxxModel> axxxs) {for (AxxxModel al : axxxs) {UpdateQuery update = new UpdateQuery();update.setIndexName("coll_axxxm_sxxxxxxx_es");update.setType("coll_axxxm_sxxxxxxx_es");UpdateRequest request = new UpdateRequest();      request.doc(al);update.setUpdateRequest(request);esOperations.update(update);}}

2. 運行后報錯：

? java.lang.IllegalArgumentException: The number of object passed must be even but was [1]

3. 報錯行為：? request.doc(al);

4. 把對象改為用Map，循環中代碼調整為：

            UpdateQuery update = new UpdateQuery();update.setIndexName("coll_axxxm_sxxxxxxx_es");update.setType("coll_axxxm_sxxxxxxx_es");UpdateRequest request = new UpdateRequest();Map<String, Object> alMap = Maps.newHashMap();alMap.put("xxx_time", al.getXxx_time());alMap.put("xxx_id", al.getXxx_id());alMap.put("fxxx_id", al.getFxxx_id());request.doc(alMap);update.setUpdateRequest(request);esOperations.update(update);

5. 以上報錯即消失。

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