Springboot 集成 Mongodb 多数据源

springboot版本2.4.5

现在网上的文章大部分都是关于2.2版本以下的springboot，集成多数据源mongdb的。所以，在这记录一篇高版本的配置。废话不多说直接开始。

首先pom引用

        
            org.springframework.boot
            spring-boot-starter-data-mongodb
        

spring:
  data:
    mongodb:
      test: #自定义库命
        authSource: admin  #mongdb 开启认证 指定认证数据库
        database: test #连接数据库
        host: 192.168.10.1 #数据库地址
        port: 27017 #数据库端口
        password: root #数据库登陆账号
        username: 123456 #数据库登陆密码
      test1: #自定义库命
        authSource: admin  #mongdb 开启认证 指定认证数据库
        database: test #连接数据库
        host: 192.168.10.1 #数据库地址
        port: 27017 #数据库端口
        password: root #数据库登陆账号
        username: 123456 #数据库登陆密码

定义抽象类进行连接mongodb

import com.mongodb.MongoClientSettings;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;
import com.mongodb.client.MongoClient;
import com.mongodb.client.MongoClients;
import com.mongodb.connection.ClusterConnectionMode;
import com.mongodb.connection.ClusterType;
import org.springframework.data.mongodb.MongoDatabaseFactory;
import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.core.MongoDatabaseFactorySupport;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.SimpleMongoClientDatabaseFactory;
import org.springframework.data.mongodb.core.mapping.MongoMappingContext;

import java.util.Arrays;

/**
 * @ClassName AbstractMongoConfig
 * @Description:
 * @Author lh
 * @Date 2021/8/23
 **/
public abstract  class AbstractMongoConfig {
    //定义相关连接数据库参数
    private String host, database, username, password, authSource;
    private int port;

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public String getDatabase() {
        return database;
    }

    public void setDatabase(String database) {
        this.database = database;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    public String getAuthSource() {
        return authSource;
    }

    public void setAuthSource(String authSource) {
        this.authSource = authSource;
    }

    /**
     * 创建MongoDbFactory，不同数据源继承该方法创建对应的MongoDbFactory。
     * @return
     * @throws Exception
     */
    public MongoDatabaseFactory mongoDbFactory() throws Exception {
        MongoCredential credential = MongoCredential.createCredential(username, authSource, password.toCharArray());
        MongoClientSettings setting=MongoClientSettings.builder()
                .credential(credential)
                .applyToClusterSettings(builder ->
                        builder.hosts(Arrays.asList(new ServerAddress(host, port)))
                                .mode(ClusterConnectionMode.SINGLE)
                                .requiredClusterType(ClusterType.STANDALONE)
                ).build();

        return new SimpleMongoClientDatabaseFactory(MongoClients.create(setting), database);
    }
    /**
     * 抽象方法，用于返回MongoTemplate
     * @param context
     * @return
     * @throws Exception
     */
    abstract public MongoTemplate getMongoTemplate(MongoMappingContext context) throws Exception;

}

定义不同的连接mongodb实例

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.convert.DefaultDbRefResolver;
import org.springframework.data.mongodb.core.convert.DefaultMongoTypeMapper;
import org.springframework.data.mongodb.core.convert.MappingMongoConverter;
import org.springframework.data.mongodb.core.mapping.MongoMappingContext;

/**
 * @ClassName test
 * @Description:
 * @Author lh
 * @Date 2021/8/23
 **/
@Configuration
@ConfigurationProperties(prefix = "spring.data.mongodb.test")
public class testMgDbConfig extends AbstractMongoConfig{


    @Override
    @Bean("testMongoTemplate")
    public MongoTemplate getMongoTemplate(MongoMappingContext context) throws Exception {
        //去除保存实体时，spring data mongodb 自动添加的_class字段
        MappingMongoConverter converter = new MappingMongoConverter(new DefaultDbRefResolver(mongoDbFactory()), context);
        converter.setTypeMapper(new DefaultMongoTypeMapper(null));

        MongoTemplate mongoTemplate = new MongoTemplate(mongoDbFactory(), converter);

        return mongoTemplate;
    }
}

到此就整合完毕，在要用的类中引用对应的  MongoTemplate

    @Autowired
    @Qualifier(value = "testMongoTemplate")
    private MongoTemplate testMongoTemplate;