spring数据mongodb映射动态场

我在我的java类中有这个模型

@Document public class Template { private String type; private String code; @Version Long version; } 

我需要添加一个名为template的新字段，并将此字段映射为动态，换句话说，我会像这样建模一个文档

 { _id: 'id' type:'myType', code:'myCode' template:{ someFiled:[ { subField1:'value1', subField2:'value2' }, { sub1Field1:'1value1', sub1Field2:'1value2' } ....................... ], otherField:[ { otherField1:'value1', otherField2:'value2' } ], ......... }, version:1000L } 

有没有办法将字段注释为动态？

解

  @Document public class Template { private String type; private String code; private Map template; @Version Long version; } 

Answer 1

我发现了一个完美的解决方案。 以我的项目为例：

 @Data @Document(collection = "logs") public class Log { @Id private String id; private Object data; // data field can be a string public void setData(String str) { data = str; } // data field can be a {} public void setData(JsonObject jsonObject) { data = new BasicDBObject(jsonObject.getMap()); } // data can be a [] public void setData(JsonArray jsonArray) { BasicDBList list = new BasicDBList(); list.addAll(jsonArray.getList()); data = list; } } 

将data字段声明为Object类型，为它实现3种setter。

以下是测试用例：

 @RunWith(SpringRunner.class) @SpringBootTest public class LogRepositoryTest { @Autowired private LogRepository logRepository; @Test public void test() { Log strLog = new Log(); strLog.setData("string here"); logRepository.save(strLog); Log objLog = new Log(); objLog.setData(new JsonObject().put("key", "value").put("obj", new JsonObject())); logRepository.save(objLog); Log aryLog = new Log(); aryLog.setData(new JsonArray().add("a").add("b").add("c")); logRepository.save(aryLog); } } 

结果如下：

 { "_id" : ObjectId("5a09fa46a15b065268a0a157"), "_class" : "ltd.linkcon.spider.domain.Log", "data" : "string here" } { "_id" : ObjectId("5a09fa46a15b065268a0a158"), "_class" : "ltd.linkcon.spider.domain.Log", "data" : { "key" : "value", "obj" : [ ] } } { "_id" : ObjectId("5a09fa46a15b065268a0a159"), "_class" : "ltd.linkcon.spider.domain.Log", "data" : [ "a", "b", "c" ] }