Is it possible to Autowire two different beans of the same class without @qualifier and @resource? If yes, how?

I have a component in jar fole which has a autowired DataSource

 @Service
 Class ReadService{
      @Autowire
       DataSource readDataSource
 }


@Service
 Class WriteService{
      @Autowire
      DataSource writeDataSource
 }

I have to configure two different severs, one to read and one to write.. how do I inject those DataSource to these beans created from Jar plugin...

You can read more here

in two words, you can specify different datasource configurations in properties file and create datasource beans separately

app.datasource.member.url=jdbc:mysql://localhost:3306/memberdb?createDatabaseIfNotExist=true
app.datasource.member.username=root
app.datasource.member.password=P@ssw0rd#
app.datasource.member.driverClassName=com.mysql.cj.jdbc.Driver
#card number  (cardholder id, cardnumber)
app.datasource.cardholder.url=jdbc:mysql://localhost:3306/cardholderdb?createDatabaseIfNotExist=true
app.datasource.cardholder.username=root
app.datasource.cardholder.password=P@ssw0rd#
app.datasource.cardholder.driverClassName=com.mysql.cj.jdbc.Driver
#expiration date (card id, expiration month, expiration year)
app.datasource.card.url=jdbc:mysql://localhost:3306/carddb?createDatabaseIfNotExist=true
app.datasource.card.username=root
app.datasource.card.password=P@ssw0rd#
app.datasource.card.driverClassName=com.mysql.cj.jdbc.Driver

For primary Datasource

@Bean
@Primary
@ConfigurationProperties("app.datasource.member")
public DataSourceProperties memberDataSourceProperties() {
    return new DataSourceProperties();
}
@Bean
@Primary
@ConfigurationProperties("app.datasource.member.configuration")
public DataSource memberDataSource() {
    return memberDataSourceProperties().initializeDataSourceBuilder()
            .type(HikariDataSource.class).build();

For secondary datasource

/*cardholder data source */
@Bean
@ConfigurationProperties("app.datasource.cardholder")
public DataSourceProperties cardHolderDataSourceProperties() {
    return new DataSourceProperties();
}
@Bean
@ConfigurationProperties("app.datasource.cardholder.configuration")
public DataSource cardholderDataSource() {
    return cardHolderDataSourceProperties().initializeDataSourceBuilder()
            .type(BasicDataSource.class).build();
}
/*card data source*/
@Bean
@ConfigurationProperties("app.datasource.card")
public DataSourceProperties cardDataSourceProperties() {
    return new DataSourceProperties();
}
@Bean
@ConfigurationProperties("app.datasource.card.configuration")
public DataSource cardDataSource() {
    return cardDataSourceProperties().initializeDataSourceBuilder()
            .type(BasicDataSource.class).build();
}

And specify schema in entity declaration

@Table(name = "member", schema = "memberdb")

If you build 2 separate applications based on same component, you can simply use different database connection settings in application.yml (or application.properties) of both applications

For "Write" app:

spring:
  datasource:
    url: jdbc:postgresql://localhost:5433/writeDB
    username: "username"
    password: "password"

For "Read" app:

spring:
  datasource:
    url: jdbc:postgresql://localhost:5433/readDB
    username: "username"
    password: "password"