출처

application.properties

spring.jpa.hibernate.naming-strategy=#
Default
ImprovedNamingStrategy
org.springframework.boot.orm.jpa.SpringNamingStrategy( ImprovedNamingStrategy 상속

example)
public class MyNamingStrategy extends SpringNamingStrategy {

private static final String TABLE_PREFIX = "tb_";   

@Override   
public String classToTableName(String className) {    
    return TABLE_PREFIX + super.classToTableName(className);    
}   

@Override   
public String tableName(String tableName) {   
    return TABLE_PREFIX + super.tableName(tableName);   
}   

}

application.properties에 다음을 추가한다.
spring.jpa.hibernate.naming-strategy=com.izeye.test.support.jpa.MyNamingStrategy

스프링 appendix
stackoverflow 관련글