1 //...此处省略了import...
2 /**
3 * Created by shenzhigang on 4/15/16.
4 */
5 public class Main {
6 public static void main(String[] args) {
7 Datastore datastore;
8 final Morphia morphia = new Morphia();
9 morphia.mapPackage("com.bdb.datatypes.common.po");
10 datastore = morphia.createDatastore(new MongoClient("localhost", 27017), "test001");
11 datastore.ensureIndexes();
12
13 Student student = new Student();
14 student.setName("沈志刚");
15 student.setAge(30);
16
17 School school = new School();
18 school.setName("苏州小学");
19 school.setAddress("苏州市");
20 datastore.save(school);
21
22 student.setSchool(school);
23 datastore.save(student);
24
25 List<Key<School>> schools =datastore.createQuery(School.class).field("name").equal("苏州小学").asKeyList();
26 List<Student> studentList = datastore.find(Student.class).field("school").in(schools).asList();
27 }
28 }
29
30 @Entity
31 class Student {
32 @Id
33 private ObjectId objectId ;
34 private String name;
35 private int age;
36 @Reference
37 private School school;
38 //...此处省略了get set....
39 }
40
41 @Entity
42 class School {
43 @Id
44 private ObjectId objectId;
45 private String address;
46 private String name;
47 //....此处省略了get set...
48 }
49
