1、根据用户ID、是否隐藏、帖子ID、发帖日期来搜索帖子
（1）插入一些测试帖子数据
POST /forum/article/_bulk { "index": { "_id": 1 }} { "articleID" : "XHDK-A-1293-#fJ3", "userID" : 1, "hidden": false, "postDate": "2017-01-01" } { "index": { "_id": 2 }} { "articleID" : "KDKE-B-9947-#kL5", "userID" : 1, "hidden": false, "postDate": "2017-01-02" } { "index": { "_id": 3 }} { "articleID" : "JODL-X-1937-#pV7", "userID" : 2, "hidden": false, "postDate": "2017-01-01" } { "index": { "_id": 4 }} { "articleID" : "QQPX-R-3956-#aD8", "userID" : 2, "hidden": true, "postDate": "2017-01-02" }