Java Spring数据MongoDb手动配置

我最终想要实现的是，从java类连接到mongo db，这种配置应该同时适用于MongoTemplate和MongoRepository

spring boot通过下面的属性直接通过application.properties文件提供mongodb的配置

spring.data.mongodb.database=delivery
spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.password=delivery-user
spring.data.mongodb.username=delivery-user

不是这样，我需要用java类本身连接到db， 这是因为我需要在属性文件中加密密码，然后从java类中解密 根据我的理解，我尝试在下面创建一个类

@Configuration
public class MongoConfig extends AbstractMongoClientConfiguration {

    @Override
    public MongoClient mongoClient() {
        String username = "delivery-user";
        String password = "delivery-user";
        String port = "27017";
        String host = "localhost";
        String db = "salesdata";
//have also tried by passing db name in conString
        String conString = "mongodb://" + username + ":" + password + "@" + host + ":" + port+"/?authSource=admin" ;
        MongoClient mClient = MongoClients.create(conString);
        return mClient;

    }

    @Override
    protected String getDatabaseName() {
        return "delivery";
    }

    @Bean
    @Override
    public MongoTemplate mongoTemplate() {
        MongoTemplate mt = new MongoTemplate(mongoClient(), getDatabaseName());
        return mt;
    }
}

我在运行此应用程序时遇到此错误

 Exception authenticating MongoCredential{mechanism=SCRAM-SHA-1, userName='delivery-user', source='admin', password=<hidden>, mechanismProperties={}}; nested exception is com.mongodb.MongoSecurityException: Exception authenticating MongoCredential{mechanism=SCRAM-SHA-1, userName='delivery-user', source='admin', password=<hidden>, mechanismProperties={}}

验证MongoCredential的异常{mechanism=SCRAM-SHA-1，userName='delivery-user'，source='admin'，password=，mechanismProperties={}；嵌套的异常是com.mongodb.MongoSecurityException：验证MongoCredential{mechanism=SCRAM-SHA-1，userName='delivery-user'，source='admin'，password=，mechanismProperties={}的异常

---

用户名和密码正确无误，用户还可以访问“delivery”db

在字符串末尾指定db名称并删除“

authSource

”将解决此问题。 另外，指定“

authSource=targetDBname

”似乎也在起作用。 工作连接字符串的示例

String conString = "mongodb://" + username + ":" + password + "@" + host + ":" + port+"/dbName";

将

dbName

替换为用户有权访问的数据库的名称