MongoDB简单测试

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pom.xml添加:

<!-- mongo --><dependency><groupId>org.mongodb</groupId><artifactId>mongo-java-driver</artifactId><version>3.0.2</version></dependency>



import java.util.ArrayList;import java.util.Date;import java.util.List;import org.bson.Document;import com.mongodb.MongoClient;import com.mongodb.client.MongoCollection;import com.mongodb.client.MongoDatabase;import com.mongodb.client.MongoIterable;import com.mongodb.client.model.Filters;import com.mongodb.client.model.Projections;import com.mongodb.client.model.Sorts;public class MongoDbWithJavaTest {    public static void main(String[] args) {        MongoClient mongo = null;        try {            // connect to mongodb            mongo = new MongoClient("localhost", 27017);            // list all databases            listDatabases(mongo);            // get database named "test"            MongoDatabase testDatabase = mongo.getDatabase("test");            // list all collections(tables)            listCollections(testDatabase);            MongoCollection<Document> userCollection = testDatabase.getCollection("user");            // list all documents in user            listAllDocuments(userCollection);            // insert new document//            insert(userCollection);            // list all documents in user after insert//            listAllDocuments(userCollection);//            listAllSpecifiedDocumentFields(userCollection);            // list document with given filter//            listDocumentWithFilter(userCollection);//            //            listDocumentWithFilterAndInReverseOrder(userCollection);                        // update document//            updateOneDocument(userCollection);            updateAllDocument(userCollection);//            //            deleteOne(userCollection);//            deleteMany(userCollection);//                        listAllDocuments(userCollection);        } catch (Exception e) {            e.printStackTrace();        } finally {            if (mongo != null) {                mongo.close();                mongo = null;            }        }    }        public static void deleteOne(MongoCollection<Document> collection) {        System.out.println("delete one records age less than 24");        collection.deleteOne(Filters.lt("age", 24));    }        public static void deleteMany(MongoCollection<Document> collection) {        System.out.println("delete all records age less than 24");        collection.deleteMany(Filters.lt("age", 24));    }    public static void updateOneDocument(MongoCollection<Document> collection) {        System.out.println("updateDocument : update one records that named 'dreamoftch' to 'ZhangSan'");        collection.updateOne(Filters.eq("name", "dreamoftch"), new Document("$set", new Document("name", "ZhangSan")));    }        public static void updateAllDocument(MongoCollection<Document> collection) {        System.out.println("updateDocument : update all records that named 'dreamoftch' to 'ZhangSan'");        collection.updateMany(Filters.eq("name", "dreamoftch"), new Document("$set", new Document("name", "ZhangSan")));    }    public static void listDatabases(MongoClient mongo) {        // list all databases        MongoIterable<String> allDatabases = mongo.listDatabaseNames();        for (String db : allDatabases) {            System.out.println("Database name: " + db);        }    }    public static void listCollections(MongoDatabase database) {        // list all databases        MongoIterable<String> allCollections = database.listCollectionNames();        for (String collection : allCollections) {            System.out.println("Collection name: " + collection);        }    }        public static void listAllDocuments(MongoCollection<Document> collection) {        System.out.println("begin get all document >>>>>>");        for (Document document : collection.find()) {            System.out.println(document);        }        System.out.println("finish get all document >>>>>>");    }        public static void listAllSpecifiedDocumentFields(MongoCollection<Document> collection) {        System.out.println("begin get all document(exclude '_id') >>>>>>");        for (Document document : collection.find().projection(Projections.exclude("_id"))) {            System.out.println(document);        }        System.out.println("finish get all document(exclude '_id') >>>>>>");    }        public static void insert(MongoCollection<Document> collection){        List<Document> documents = new ArrayList<Document>();        for (int i = 0; i < 10; i++) {            documents.add(new Document("name", "dreamoftch").append("age", (20+i)).append("createdDate", new Date()));        }        collection.insertMany(documents);    }        public static void listDocumentWithFilter(MongoCollection<Document> collection) {        System.out.println("begin get document(name: dreamoftch, age > 25) >>>>>>");        for (Document document : collection.find(Filters.and(Filters.eq("name", "dreamoftch"), Filters.gt("age", 25)))) {            System.out.println(document);        }        System.out.println("finish get document(name: dreamoftch, age > 25) >>>>>>");    }        public static void listDocumentWithFilterAndInReverseOrder(MongoCollection<Document> collection) {        System.out.println("begin get document(name: dreamoftch, age > 25) >>>>>>");        for (Document document : collection.find(Filters.and(Filters.eq("name", "dreamoftch"), Filters.gt("age", 25))).sort(Sorts.descending("age"))) {            System.out.println(document);        }        System.out.println("finish get document(name: dreamoftch, age > 25) >>>>>>");    }}


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