原文链接
http://docs.mongodb.org/ecosystem/tutorial/getting-started-with-java-driver/
介绍
本文的目的是让你对如何使用Mongodb的java-driver驱动有一个简单的了解，当你阅读完本文你就可以参考其他文章以了解更多信息。
下载java-driver驱动
你可以在这里下载需要的驱动。
添加java-driver驱动
将下载的mongo-java-driver-2.12.3.jar 拷贝到你的lib目录下。
获取数据库对象
MongoClient mongoClient = new MongoClient( "localhost" , 5000 ); // 5000 为实例端口号，默认启动端口号为27017
DB db = mongoClient.getDB("mydb"); // 必须要先创建数据库
获取集合名称
Set<String> colls = db.getCollectionNames();
for (String s : colls) {
System.out.println(s);
}
获取集合对象
DBCollection coll = db.getCollection("blog");
获取集合文档数
System.out.println(coll.getCount());
插入一个文档
BasicDBObject doc = new BasicDBObject("name", "MongoDB")
.append("type", "database")
.append("count", 1)
.append("info", new BasicDBObject("x", 203).append("y", 102));
coll.insert(doc);
插入多个文档
for (int i=0; i < 100; i++) {
coll.insert(new BasicDBObject("i", i));
}
使用游标查询满足条件的文档
BasicDBObject query = new BasicDBObject("i", 71);
DBCursor cursor = coll.find(query);
try {
while(cursor.hasNext()) {
System.out.println(cursor.next());
}
} finally {
cursor.close();
}
BulkWriteOperation builder = coll.initializeOrderedBulkOperation();
builder.insert(new BasicDBObject("_id", 1));
builder.insert(new BasicDBObject("_id", 2));
builder.insert(new BasicDBObject("_id", 3));
更新已存在的文档
builder.find(new BasicDBObject("_id", 1)).updateOne(new BasicDBObject("$set", new BasicDBObject("x", 2)));
删除已存在的文档
builder.find(new BasicDBObject("_id", 2)).removeOne();
builder.find(new BasicDBObject("_id", 3)).replaceOne(new BasicDBObject("_id", 3).append("x", 4));
BulkWriteResult result = builder.execute();
MongoDB--Getting Started with Java Driver