先引入mongo-java-dirver驱动
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<!-- mongo-java-dirver -->
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
<version>
3.4
.
2
</version>
</dependency>
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代码操作演示:
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package
com.simple.database.test;
import
java.util.ArrayList;
import
java.util.List;
import
org.bson.Document;
import
org.bson.conversions.Bson;
import
com.mongodb.MongoClient;
import
com.mongodb.client.FindIterable;
import
com.mongodb.client.MongoCollection;
import
com.mongodb.client.MongoCursor;
import
com.mongodb.client.MongoDatabase;
import
com.mongodb.client.model.Filters;
/**
* java操作MongoDB
* @author root
*/
public
class
HelloMongoDB {
public
static
void
main(String[] args) {
try
{
// 1、连接到MongoDB服务
MongoClient mc =
new
MongoClient(
"127.0.0.1"
,
27017
);
// 2、连接到指定数据库
MongoDatabase db = mc.getDatabase(
"demodb"
);
// 3、创建集合
// db.createCollection("simplelife");
// 4、获取集合
MongoCollection<Document> collection = db.getCollection(
"users"
);
// 5、插入文档数据
// insertCollectionData(collection);
// 6、查询文档数据
findCollectionData(collection);
// 7、更新文档数据
// 将文档中likes=100的文档修改为likes=200
updateCollectionData(collection);
// 8、删除第一个文档数据
collection.deleteMany(Filters.eq(
"likes"
,
200
));
collection.deleteOne(Filters.eq(
"likes"
,
100
));
}
catch
(Exception e) {
e.printStackTrace();
System.out.println(e.getClass().getName() +
"……"
+ e.getMessage());
}
}
private
static
void
updateCollectionData(
MongoCollection<Document> collection) {
Bson filter = Filters.eq(
"likes"
,
100
);
Document update =
new
Document(
"$set"
,
new
Document(
"likes"
,
200
));
collection.updateMany(filter, update);
}
private
static
void
findCollectionData(MongoCollection<Document> collection) {
FindIterable<Document> findIterable = collection.find();
MongoCursor<Document> mongoCursor = findIterable.iterator();
while
(mongoCursor.hasNext()){
System.out.println(mongoCursor.next());
}
}
/**
* 插入文档 1、创建文档org.bson.Document参数为key-value的格式
* 2、创建文档集合List<Document>
* 3、将文档集合插入数据库集合:mongoCollection.insertMany(List<Document>)
* 插入单个文档可以用 :mongoCollection.insertOne(Document)
*/
private
static
void
insertCollectionData(
MongoCollection<Document> collection) {
Document document =
new
Document(
"title"
,
"MongoDB"
);
document.append(
"description"
,
"database"
).append(
"likes"
,
100
)
.append(
"by"
,
"Fly"
);
List<Document> documents =
new
ArrayList<>();
documents.add(document);
collection.insertMany(documents);
System.out.println(
"文档插入成功!"
);
}
}
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本文转自 兴趣e族 51CTO博客,原文链接:http://blog.51cto.com/simplelife/1929886