Morphia的使用

Morphia配合mongoDB就如同Hibernate配合关系型数据库.所以可以认为Morphia在MongoDB的基础上面调用mongoDB的语法. 在java中直接调用Morphia的api会显得比较简单快捷. 1.加入mongoDB和Morphia的Jar包. //创建连接源Mongo mongo = null;try {mongo = new Mongo

Morphia配合mongoDB就如同Hibernate配合关系型数据库.所以可以认为Morphia在MongoDB的基础上面调用mongoDB的语法.

在java中直接调用Morphia的api会显得比较简单快捷.

1.加入mongoDB和Morphia的Jar包.

//创建连接源
Mongo mongo = null;
	try {
	mongo = new Mongo();
	} catch (UnknownHostException e) {
	e.printStackTrace();
	}
	Morphia morphia = new Morphia();
	Datastore ds = morphia.createDatastore(mongo, "test");

//查找
	for(User user:ds.find(User.class, "password", "admin")){
	System.out.println(user);
	}
	System.out.println(ds.find(User.class, "password", "admin").get());

	//插入

	User user1 = new User("00018", "hello1", "hello1");
	User user2 = new User("00019", "hello2", "hello2");
	List list = new ArrayList<>();
	list.add(user1);
	list.add(user2);
	ds.save(list);

	// 修改
	Query query =
	ds.createQuery(User.class).field("uid").equal("00013");
	UpdateOperations uo =
	ds.createUpdateOperations(User.class).set("password",
	"IDONTKONW").set("userName", "IDONTKONW");
	ds.update(query, uo);


	/**
	 * 删除
	 * 
	 */
	// ds.delete(User.class, "00018");
	Query query = ds.createQuery(User.class).field("userName").contains("t");
	ds.delete(query);