Table of Contents1. Overview2. Rules for username3. Regex for user name – ^([a-zA-Z])+([\\w]{2,})+$3. Conclusion4. Source Code5. References 1. Overview This article is about for Java Regular Expression for username. While…
Table of Contents1. Overview2. Without parent pom configurations3. Conclusion4. Source Code5. References 1. Overview In this article, we learn how we can include or configure maven dependency without parent pom….
Table of Contents1. Overview2. Spring ConditionalOnResource Example3. Conclusion4. Source Code5. References 1. Overview Spring framework makes our very easy work to creating beans and accessing those beans in teams of…
Table of Contents1. Overview2. Delete using Query Derivation Mechanism and Default Method3. Delete Operation using Custom Query4. Generate Dynamic Delete query5. Conclusion6. References7. Source Code 1. Overview This article is…
Table of Contents1. Overview1.1 MongoDB1.2 REST Api1.3 Postman2. Example for REST Api with mongodb2.1 File Structure2.2 Installing Dependencies2.3 Example2.4 Output3. Conclusion4. Reference 1. Overview In this article, we will look into…
Table of Contents1. Overview2. Elastic Search PUT Mapping2.1 PUT Mapping Json Source2.2 PUT Mapping Nested Data Type2.3 PUT Mapping XContentBuilder2.4 PUT Mapping Map3. GET Mapping3.1 Example3.2 Output4. GET Field Mapping4.1…
Table of Contents1. Overview2.1 Spring JPA where query2.2 Spring JPA where multiple conditions2.3 Spring JPA where multiple conditions OR2.4 Spring JPA where with between query2.5 Spring JPA where with Paging2.6…
Table of Contents1. Overview2. Spring JPA with SQL database2.1 Database Migration3. Spring JPA with No-SQL database3. Conclusion4. References 1. Overview Spring Data JPA is an implementation of Java Persistence API…
Table of Contents1. Overview2. Spring Jackson tutorial3. Spring Gson tutorial4. Conclusion 1. Overview Gson and Jackson both are the very powerful and popular libraries to convert Java Object to JSON…
Table of Contents1. Overview2. Custom format using application.properties or yml 3. Custom date format using GsonBuilder4. Gson Date to long5. Gson Date with Time Zone4. Conclusion5. References6. Source Code 1….
