spring-data-mongodb 配置和使用多個 mongoTemplate_spring-data-mongodb

有時候需要使用多個mongoTemplate訪問兩個不同的mongodb執行個體，此時（在spring-boot的情況下）無法使用預設配置，只能手動配了。 1、引入依賴（以spring-boot為例）

<dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-data-mongodb</artifactId></dependency>

2、設定檔中配置兩個mongodb uri（也可以配成兩個host/port）

spring:  profiles: dev  data:    mongodb:      uri: mongodb://192.168.0.9:27017/log1DbName    mongodb2:      uri: mongodb://192.168.0.11:27017/log2DbName

3、設定檔出場：

@Configurationpublic class MongoConfig{   //@Value("${mongo.host}")   @Value("${spring.data.mongodb.uri}")   private String MONGO_URI1;   @Value("${spring.data.mongodb2.uri}")   private String MONGO_URI2;   @Bean   public MongoMappingContext mongoMappingContext() {      MongoMappingContext mappingContext = new MongoMappingContext();      return mappingContext;   }   // ==================== 串連到 mongodb1 伺服器 ======================================   @Bean //使用自訂的typeMapper去除寫入mongodb時的“_class”欄位   public MappingMongoConverter mappingMongoConverter1() throws Exception {      DefaultDbRefResolver dbRefResolver = new DefaultDbRefResolver(this.dbFactory1());      MappingMongoConverter converter = new MappingMongoConverter(dbRefResolver, this.mongoMappingContext());      converter.setTypeMapper(new DefaultMongoTypeMapper(null));      return converter;   }   @Bean   @Primary   public MongoDbFactory dbFactory1() throws UnknownHostException {      return new SimpleMongoDbFactory(new MongoClientURI(MONGO_URI1));   }   @Bean   @Primary   public MongoTemplate mongoTemplate1() throws Exception {      return new MongoTemplate(this.dbFactory1(), this.mappingMongoConverter1());   }   // ===================== 串連到 mongodb2 伺服器 =================================//不需要去除寫入mongodb時的“_class”欄位/* //可以使用Mongo或MongoDbFactory兩種對象進行配置   @Bean   public Mongo mongo2() throws Exception {      return new MongoClient(new MongoClientURI(MONGO_DATA_SYNC_URI));   }   @Bean   public MongoTemplate mongoTemplate2() throws Exception {      return new MongoTemplate(mongo2(), "log2DbName");   }*/   @Bean   public MongoDbFactory dbFactory2() throws UnknownHostException {      return new SimpleMongoDbFactory(new MongoClientURI(MONGO_URI2));   }   @Bean   public MongoTemplate mongoTemplate2() throws Exception {      return new MongoTemplate(dbFactory2());   }}

4、使用方法：使用@Resource註解根據名字注入兩個不同的mongoTemplate

@Resourceprivate MongoTemplate mongoTemplate1;@Resourceprivate MongoTemplate mongoTemplate2;@Testpublic void mongoTemplateTest(){   PVUV pvuv = new PVUV();   pvuv.setDate(LocalDate.now());   pvuv.setPv(1000);   pvuv.setUv(200);   mongoTemplate1.save(pvuv, "pvUvCollection");   mongoTemplate2.save(pvuv, "pvUvCollection");}