mongodb 3.4更新数据java.lang.IllegalArgumentException: Invalid BSON field name age

mongodb使用updateOne和updateMany是可以的，只是方式不对

这几天在学习mongodb，在使用mongodb-client shell命令后，想使用java也试试

发现使用mongoCollection.updateOne 会报错，而使用mongoCollection.replaceOne却不会报错，

我在网上搜索了下，网上找到的答案是

”分析：

    应该是官方的update策略有变化，3.0以前，使用updateOne，3.0以后使用replaceOne

解决办法：

    将updateOne替换为replaceOne即可 ”

这让我很费解，，如果是不建议使用了，为什么不直接废弃呢，不使用@deprecated这样的注解呢

我想，存在即合理，可用的，，

所以我使用断点找了很久很久

使用shell命令updateOne的方式是

db.collection.updateOne(   <filter>,   <update>,   {     upsert: <boolean>,     writeConcern: <document>,     collation: <document>   })

> db.testMongo.find({name:'zhaoliu'})
{ "_id" : ObjectId("591bf047b5ab733b38d06745"), "name" : "zhaoliu", "age" : "21" }
> 

> db.testMongo.update({name:'zhaoliu'},{$set:{age:'1000'}})
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })

> db.testMongo.find({name:'zhaoliu'})
{ "_id" : ObjectId("591bf047b5ab733b38d06745"), "name" : "zhaoliu", "age" : "1000" }
> 

既然shell是这样的是的

为什么java代码不行呢

public void testMongogUpdateOne(){    MongoDatabase database = MongodbUtils.getDatabase("testMongo");    MongoCollection mongoCollection = database.getCollection("testMongo");    Document document = new Document("name", "zhaoliu");    Document documentNew = new Document("name", "aaa").append("age", 21);    mongoCollection.replaceOne(document, documentNew);}

replaceOne是可以执行成功的

public void testMongogUpdateOne(){    MongoDatabase database = MongodbUtils.getDatabase("testMongo");    MongoCollection mongoCollection = database.getCollection("testMongo");    Document document = new Document("name", "zhaoliu");    Document documentNew = new Document("name", "aaa").append("age", 21);    mongoCollection.updateOne(document, documentNew);}

而使用updateOne  却不行

Disconnected from the target VM, address: '127.0.0.1:52998', transport: 'socket'
java.lang.IllegalArgumentException: Invalid BSON field name age
at org.bson.AbstractBsonWriter.writeName(AbstractBsonWriter.java:516)
at org.bson.codecs.DocumentCodec.writeMap(DocumentCodec.java:188)
at org.bson.codecs.DocumentCodec.encode(DocumentCodec.java:131)
at org.bson.codecs.DocumentCodec.encode(DocumentCodec.java:45)
at org.bson.codecs.BsonDocumentWrapperCodec.encode(BsonDocumentWrapperCodec.java:63)
at org.bson.codecs.BsonDocumentWrapperCodec.encode(BsonDocumentWrapperCodec.java:29)
at com.mongodb.connection.UpdateCommandMessage.writeTheWrites(UpdateCommandMessage.java:85)
at com.mongodb.connection.UpdateCommandMessage.writeTheWrites(UpdateCommandMessage.java:43)
at com.mongodb.connection.BaseWriteCommandMessage.encodeMessageBodyWithMetadata(BaseWriteCommandMessage.java:129)
at com.mongodb.connection.RequestMessage.encodeWithMetadata(RequestMessage.java:160)
at com.mongodb.connection.WriteCommandProtocol.sendMessage(WriteCommandProtocol.java:220)
at com.mongodb.connection.WriteCommandProtocol.execute(WriteCommandProtocol.java:101)
at com.mongodb.connection.UpdateCommandProtocol.execute(UpdateCommandProtocol.java:64)
at com.mongodb.connection.UpdateCommandProtocol.execute(UpdateCommandProtocol.java:37)
at com.mongodb.connection.DefaultServer$DefaultServerProtocolExecutor.execute(DefaultServer.java:168)
at com.mongodb.connection.DefaultServerConnection.executeProtocol(DefaultServerConnection.java:289)
at com.mongodb.connection.DefaultServerConnection.updateCommand(DefaultServerConnection.java:143)
at com.mongodb.operation.MixedBulkWriteOperation$Run$3.executeWriteCommandProtocol(MixedBulkWriteOperation.java:490)
at com.mongodb.operation.MixedBulkWriteOperation$Run$RunExecutor.execute(MixedBulkWriteOperation.java:656)
at com.mongodb.operation.MixedBulkWriteOperation$Run.execute(MixedBulkWriteOperation.java:409)
at com.mongodb.operation.MixedBulkWriteOperation$1.call(MixedBulkWriteOperation.java:177)
at com.mongodb.operation.MixedBulkWriteOperation$1.call(MixedBulkWriteOperation.java:168)
at com.mongodb.operation.OperationHelper.withConnectionSource(OperationHelper.java:422)
at com.mongodb.operation.OperationHelper.withConnection(OperationHelper.java:413)
at com.mongodb.operation.MixedBulkWriteOperation.execute(MixedBulkWriteOperation.java:168)
at com.mongodb.operation.MixedBulkWriteOperation.execute(MixedBulkWriteOperation.java:74)
at com.mongodb.Mongo.execute(Mongo.java:845)
at com.mongodb.Mongo$2.execute(Mongo.java:828)
at com.mongodb.MongoCollectionImpl.executeSingleWriteRequest(MongoCollectionImpl.java:550)
at com.mongodb.MongoCollectionImpl.update(MongoCollectionImpl.java:542)
at com.mongodb.MongoCollectionImpl.updateOne(MongoCollectionImpl.java:381)
at com.mongodb.MongoCollectionImpl.updateOne(MongoCollectionImpl.java:376)
at com.project.mongodb.MongodbUtils.testMongodbUpdateOneOther(MongodbUtils.java:136)
at com.project.mongodb.MongodbUtils.main(MongodbUtils.java:174)

我想是为啥client是用$set这样的修饰符的，，，而java中为啥是没有呢

我在debug时发现了这样的代码

public void writeName(String name) {    if(this.state != AbstractBsonWriter.State.NAME) {        this.throwInvalidState("WriteName", new AbstractBsonWriter.State[]{AbstractBsonWriter.State.NAME});    }    if(name == null) {        throw new IllegalArgumentException("BSON field name can not be null");    } else if(!((FieldNameValidator)this.fieldNameValidatorStack.peek()).validate(name)) {        throw new IllegalArgumentException(String.format("Invalid BSON field name %s", new Object[]{name}));    } else {        this.context.name = name;        this.state = AbstractBsonWriter.State.VALUE;    }}

其中

if(!((FieldNameValidator)this.fieldNameValidatorStack.peek()).validate(name))

是调用 
UpdateFieldNameValidator中的方式的

public boolean validate(String fieldName) {    return fieldName.startsWith("$");}
发现是使用使用$开头所以
我将updateOne传入的参数改了下
public void testMongodbUpdateOneOther(){    MongoDatabase database = MongodbUtils.getDatabase("testMongo");    MongoCollection<Document> mongoCollection = database.getCollection("testMongo");    Document document = new Document("name", "zhaoliu");    Document modifiers = new Document();    Document documentNew = new Document();    documentNew.append("age", 210);    modifiers.append("$set", documentNew);    UpdateResult updateResult = mongoCollection.updateOne(document, modifiers);    System.out.println(updateResult.getMatchedCount());}

这样就可以执行成功了
我将我在学习mongodb中遇到的问题分享出来，有不对之处请指出下，，谢谢