Linux 下源代码按照步骤 查看

---

官方JAVA API资料查看

---

修改默认IP，运行外部请求访问，使用 –bind_ip_all参数配合启动

mongod --bind_ip_all

---

• json转bson，附上官方的例子原始连接

String inputFilename;                  // initialize to the path of the file to read from
MongoCollection<Document> collection;  // initialize to the collection to which you want to write

BufferedReader reader = new BufferedReader(new FileReader(inputFilename));

try {
    String json;

    while ((json = reader.readLine()) != null) {
        collection.insertOne(Document.parse(json));
    } 
} finally {
    reader.close();
}

---

cluster搭建教程，按照此篇在MongoDB 3.6中有所改变

• rs1 rs2 启动脚本修改为如下

###for rs1

$BIN_HOME/mongod --port $RS1_1_PORT --dbpath $RS1_1_DB_PATH --fork --logpath $RS1_1_DB_LOG --replSet $RS1 --smallfiles --nojournal --shardsvr
$BIN_HOME/mongod --port $RS1_2_PORT --dbpath $RS1_2_DB_PATH --fork --logpath $RS1_2_DB_LOG --replSet $RS1 --smallfiles --nojournal --shardsvr 
$BIN_HOME/mongod --port $RS1_3_PORT --dbpath $RS1_3_DB_PATH --fork --logpath $RS1_3_DB_LOG --replSet $RS1 --smallfiles --nojournal --shardsvr

### for rs2

$BIN_HOME/mongod --port $RS2_1_PORT --dbpath $RS2_1_DB_PATH --fork --logpath $RS2_1_DB_LOG --replSet $RS2 --smallfiles --nojournal --shardsvr
$BIN_HOME/mongod --port $RS2_2_PORT --dbpath $RS2_2_DB_PATH --fork --logpath $RS2_2_DB_LOG --replSet $RS2 --smallfiles --nojournal --shardsvr
$BIN_HOME/mongod --port $RS2_3_PORT --dbpath $RS2_3_DB_PATH --fork --logpath $RS2_3_DB_LOG --replSet $RS2 --smallfiles --nojournal --shardsvr

• 解决错误 Attempting to initiate a replica set with name xxx, but command line xxx

rs.initiate(config)
{
    "ok" : 0,
    "errmsg" : "Attempting to initiate a replica set with name rs2, but command line reports rs1; rejecting",
    "code" : 93,
    "codeName" : "InvalidReplicaSetConfig"
}

查询资料得知，当前mongod 配合 –replSet 参数里的 数值一定要和config参数里的一致，不然就会报错

我原来的是这个,指定的是rs1，但config文件里，和实际运行的节点里写的是rs2,因为不一致所以导致了这个错误

把下面的rs1修改为rs2（我的实际replSet 名字）即可

/usr/local/mongodb/bin/mongod --port 27020 --dbpath /home/mongo_db/data/rs1_3 --fork --logpath /home/mongo_db/log/rs1_3.log --replSet rs1 --smallfiles --nojournal

• 报错 mirrored config server connections are not supported,这里是国外解决方法原帖

简单来说就是把启动config server的脚本修改如下

###for statup the config server

$BIN_HOME/mongod --port $CONF1_PORT --dbpath $CONF1_DB_PATH --fork --logpath $CONF1_DB_LOG --configsvr --replSet conf
$BIN_HOME/mongod --port $CONF2_PORT --dbpath $CONF2_DB_PATH --fork --logpath $CONF2_DB_LOG --configsvr --replSet conf
$BIN_HOME/mongod --port $CONF3_PORT --dbpath $CONF3_DB_PATH --fork --logpath $CONF3_DB_LOG --configsvr --replSet conf

另外需要连接到任意一台的config server上 执行命令注册 config server的repl集群

###因为是单机，多实例环境，所以省略了IP地址，直接指定了端口

mongo --port $CONF1_PORT

//登陆以后，执行一下命令，注册名为conf的config集群.
rs.initiate(
  {
    _id: "conf",
    configsvr: true,
    members: [
      { _id : 0, host : "localhost:40000" },
      { _id : 1, host : "localhost:40001" },
      { _id : 2, host : "localhost:40002" }
    ]
  }
)

然后启动route,这次不会报错了

mongos --configdb "conf/localhost:40000,localhost:40001,localhost:40002" --fork --logpath $ROUTE_DB_LOG --port $ROUTE_PORT  --bind_ip_all 

• java客户端 连接 cluster的时候报错 Can not create shards: sharding not enabled for db
  记得在mogos，也就是route上，执行如下命令，your_db_name填你自己的实际数据库名.

sh.enableSharding("your_db_name")

---

java端 简单实例代码

/*
 * Copyright 2015 MongoDB, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package tour;

import com.mongodb.Block;
import com.mongodb.MongoClient;
import com.mongodb.MongoClientURI;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoCursor;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.model.BulkWriteOptions;
import com.mongodb.client.model.DeleteOneModel;
import com.mongodb.client.model.InsertOneModel;
import com.mongodb.client.model.ReplaceOneModel;
import com.mongodb.client.model.UpdateOneModel;
import com.mongodb.client.model.WriteModel;
import com.mongodb.client.result.DeleteResult;
import com.mongodb.client.result.UpdateResult;
import org.bson.Document;

import java.util.ArrayList;
import java.util.List;

import static com.mongodb.client.model.Accumulators.sum;
import static com.mongodb.client.model.Aggregates.group;
import static com.mongodb.client.model.Aggregates.match;
import static com.mongodb.client.model.Aggregates.project;
import static com.mongodb.client.model.Filters.and;
import static com.mongodb.client.model.Filters.eq;
import static com.mongodb.client.model.Filters.exists;
import static com.mongodb.client.model.Filters.gt;
import static com.mongodb.client.model.Filters.gte;
import static com.mongodb.client.model.Filters.lt;
import static com.mongodb.client.model.Filters.lte;
import static com.mongodb.client.model.Projections.excludeId;
import static com.mongodb.client.model.Sorts.descending;
import static com.mongodb.client.model.Updates.inc;
import static com.mongodb.client.model.Updates.set;
import static java.util.Arrays.asList;
import static java.util.Collections.singletonList;

/**
 * The QuickTour code example see: https://mongodb.github.io/mongo-java-driver/3.0/getting-started
 */
public class QuickTour {
    /**
     * Run this main method to see the output of this quick example.
     *
     * @param args takes an optional single argument for the connection string
     */
    public static void main(final String[] args) {
        MongoClient mongoClient;

        if (args.length == 0) {
            // connect to the local database server
            mongoClient = new MongoClient();
        } else {
            mongoClient = new MongoClient(new MongoClientURI(args[0]));
        }

        // get handle to "mydb" database
        MongoDatabase database = mongoClient.getDatabase("mydb");


        // get a handle to the "test" collection
        MongoCollection<Document> collection = database.getCollection("test");

        // drop all the data in it
        collection.drop();

        // make a document and insert it
        Document doc = new Document("name", "MongoDB")
                       .append("type", "database")
                       .append("count", 1)
                       .append("info", new Document("x", 203).append("y", 102));

        collection.insertOne(doc);

        // get it (since it's the only one in there since we dropped the rest earlier on)
        Document myDoc = collection.find().first();
        System.out.println(myDoc.toJson());

        // now, lets add lots of little documents to the collection so we can explore queries and cursors
        List<Document> documents = new ArrayList<Document>();
        for (int i = 0; i < 100; i++) {
            documents.add(new Document("i", i));
        }
        collection.insertMany(documents);
        System.out.println("total # of documents after inserting 100 small ones (should be 101) " + collection.count());

        // find first
        myDoc = collection.find().first();
        System.out.println(myDoc.toJson());

        // lets get all the documents in the collection and print them out
        MongoCursor<Document> cursor = collection.find().iterator();
        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next().toJson());
            }
        } finally {
            cursor.close();
        }

        for (Document cur : collection.find()) {
            System.out.println(cur.toJson());
        }

        // now use a query to get 1 document out
        myDoc = collection.find(eq("i", 71)).first();
        System.out.println(myDoc.toJson());

        // now use a range query to get a larger subset
        cursor = collection.find(gt("i", 50)).iterator();

        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next().toJson());
            }
        } finally {
            cursor.close();
        }

        // range query with multiple constraints
        cursor = collection.find(and(gt("i", 50), lte("i", 100))).iterator();

        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next().toJson());
            }
        } finally {
            cursor.close();
        }

        // Query Filters
        myDoc = collection.find(eq("i", 71)).first();
        System.out.println(myDoc.toJson());

        // now use a range query to get a larger subset
        Block<Document> printBlock = new Block<Document>() {
            @Override
            public void apply(final Document document) {
                System.out.println(document.toJson());
            }
        };
        collection.find(gt("i", 50)).forEach(printBlock);

        // filter where; 50 < i <= 100
        collection.find(and(gt("i", 50), lte("i", 100))).forEach(printBlock);

        // Sorting
        myDoc = collection.find(exists("i")).sort(descending("i")).first();
        System.out.println(myDoc.toJson());

        // Projection
        myDoc = collection.find().projection(excludeId()).first();
        System.out.println(myDoc.toJson());

        // Aggregation
        collection.aggregate(asList(
                match(gt("i", 0)),
                project(Document.parse("{ITimes10: {$multiply: ['$i', 10]}}")))
        ).forEach(printBlock);

        myDoc = collection.aggregate(singletonList(group(null, sum("total", "$i")))).first();
        System.out.println(myDoc.toJson());

        // Update One
        collection.updateOne(eq("i", 10), set("i", 110));

        // Update Many
        UpdateResult updateResult = collection.updateMany(lt("i", 100), inc("i", 100));
        System.out.println(updateResult.getModifiedCount());

        // Delete One
        collection.deleteOne(eq("i", 110));

        // Delete Many
        DeleteResult deleteResult = collection.deleteMany(gte("i", 100));
        System.out.println(deleteResult.getDeletedCount());

        collection.drop();

        // ordered bulk writes
        List<WriteModel<Document>> writes = new ArrayList<WriteModel<Document>>();
        writes.add(new InsertOneModel<Document>(new Document("_id", 4)));
        writes.add(new InsertOneModel<Document>(new Document("_id", 5)));
        writes.add(new InsertOneModel<Document>(new Document("_id", 6)));
        writes.add(new UpdateOneModel<Document>(new Document("_id", 1), new Document("$set", new Document("x", 2))));
        writes.add(new DeleteOneModel<Document>(new Document("_id", 2)));
        writes.add(new ReplaceOneModel<Document>(new Document("_id", 3), new Document("_id", 3).append("x", 4)));

        collection.bulkWrite(writes);

        collection.drop();

        collection.bulkWrite(writes, new BulkWriteOptions().ordered(false));
        //collection.find().forEach(printBlock);

        // Clean up
        database.drop();

        // release resources
        mongoClient.close();
    }
}