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我是MongoDb的新手,有很多關於在2.x版本中更新集合的例子,但我找不到關於3.x版本的任何源代碼。如何在Java中更新MongoDb數據庫?
Java代碼:
MongoClient mongoClient = new MongoClient("localhost",27017);
MongoDatabase database = mongoClient.getDatabase("dbTest");
MongoCollection<Document> collection = database.getCollection("colTest");
Document updateQuery = new Document();
updateQuery.append("$set",
new Document().append("_id", "test"));
Document searchQuery = new Document();
searchQuery.append("likes", "125");
collection.updateMulti(searchQuery, updateQuery); //.updateMulti gives an error.
沒有任何updateMulti在3.X我怎麼能檢查數據庫的ID和更改數據更呢?
實施例的MongoDB:
{
"_id" : "test",
"status" : 2,
"time" : null,
"instagram" :{
"description" : "database",
"likes" : 100,
"url" : "http://www.instagram.com/",
"by", "users"
},
"batchid" : 15000234
}
預期輸出:
{
"_id" : "test",
"status" : 1,
"time" : null,
"instagram" :{
"description" : "database",
"likes" : 125,
"url" : "http://www.instagram.com/",
"by", "users"
},
"batchid" : 15000234
}