MongoDB和Java-PHP

一、java操作mongoDB

配置环境：

1、下mongodb JDBC驱动mongo-java-driver-3.2.2.jar,并包含在classpath中

步骤：

1、连接数据库

// 连接到 mongodb 服务
MongoClient mongoClient = new MongoClient( "localhost" , 27017 );      
// 连接到数据库
MongoDatabase mongoDatabase =mongoClient.getDatabase("mycol");

2、如果需要验证用户名和密码，则

//连接到MongoDB服务 如果是远程连接可以替换“localhost”为服务器所在IP地址  
//ServerAddress()两个参数分别为 服务器地址 和 端口  
ServerAddress serverAddress = new ServerAddress("localhost",27017);  
List<ServerAddress> addrs = new ArrayList<ServerAddress>();  
addrs.add(serverAddress);                
//MongoCredential.createScramSha1Credential()三个参数分别为 用户名 数据库名称 密码  
MongoCredential credential =MongoCredential.createScramSha1Credential("username", "databaseName", "password".toCharArray());  
List<MongoCredential> credentials = new ArrayList<MongoCredential>();  credentials.add(credential);  
//通过连接认证获取MongoDB连接  
MongoClient mongoClient = new MongoClient(addrs,credentials);  
//连接到数据库  
MongoDatabase mongoDatabase =mongoClient.getDatabase("databaseName"); 

3、操作数据库

创建集合

 mongoDatabase.createCollection("test");

获取集合

 MongoCollection<Document> collection = mongoDatabase.getCollection("test");

插入文档

Document document = new Document("title", "MongoDB").  
append("description", "database").  
append("likes", 100).  
append("by", "Fly");  
List<Document> documents = new ArrayList<Document>();  
documents.add(document);  
collection.insertMany(documents); 

获取文档

FindIterable<Document> findIterable = collection.find();  //获取迭代器
MongoCursor<Document> mongoCursor = findIterable.iterator();  //获取游标
while(mongoCursor.hasNext()){  
       System.out.println(mongoCursor.next());  
}  

更新文档

//更新文档   将文档中likes=100的文档修改为likes=200   
collection.updateMany(Filters.eq("likes", 100), new Document("$set",new Document("likes",200)));  

删除文档

//删除符合条件的第一个文档  
collection.deleteOne(Filters.eq("likes", 200));  
//删除所有符合条件的文档  
collection.deleteMany (Filters.eq("likes", 200));