Spring

CSV to MongoDB Spring Boot Batch Example | In the previous example we have seen Spring Boot Batch CSV to MySQL database. Now we will see the Spring Boot batch CSV to MongoDB example. Also see:- The properties of MongoDB:- For mongo database:- CSV to MongoDB Spring Boot Batch Create a Spring starter project with […]

CSV File To MySQL Database Spring Boot Batch API Example | It is mostly asked interview questions in Spring Boot Batch API. Also see:- Tokenize: Convert one String into multiple Strings using one separator symbol (delimiter, . – / +). Example: “Hello-World-Welcome-To-KnowProgram”, after tokenize:-“Hello”, “World”, “Welcome”, “To”, “KnowProgram”. Assume we have a CSV file products.csv

Spring Boot Batch API Introduction | Batch API: Processing Large data sets and transferring from source to destination. Source/Destination can be Database, FileSystem. Example:- Also see:- What is the difference between Spring JDBC Batch API and Spring Boot batch API? Batch Processing API Details 1 Step = 1 Reader + 1 Processor + 1 Writer

MongoTemplate Spring Boot Example | MonogoTemplate is an auto-configured class given by Spring Data MongoDB, used to perform all operations over MongoDB Collection. When we use MongoTemplate(C), no need to use the MongoRepository interface. We can directly use MongoTemplate(C) [Autowired] inside our application. Query-based Operations:- We can define Query with Criteria which is also called

Spring Boot MongoDB Complex Types Example | We will see how to work with primitive data types, collection data, and classType (Embedded and DBRef) in MongoDB through Spring Boot examples. In MongoDB, there is no concept of association mappings like One-To-One, One-To-Many, and e.t.c. Here we use Embedded and DBRef concepts. We will discuss them

Projections using MongoDB Query in Spring Boot | By default, the custom query fetches all variables/key data from the collection. But using Projections we can fetch only selected variables/keys from the collection. @Query(value=”{ … condition…}”, fields =” {…variable : 1.. }” Here field section is used to select variables for display:- Default values for display:-

Custom Query Methods in MongoDB – Spring Boot | @Query: This annotation provides the custom query for MongoDB using abstract methods defined in the Repository interface. Create a spring starter project with dependencies:- Lombok, Spring Data MongoDB. In application.properties:- When we are fetching one JSON doc data it may return null also, then use a

Spring Boot with MongoDB Basic Example | Install the MongoDB database, and let us create a spring boot application to connect the MongoDB and perform some CRUD operations. For all CRUD operations see:- Spring Data JPA Introduction. Also see:- SQL v/s NoSQL Databases MongoDB Commands To start MongoDB Server (starts on port number: 27017):-> mongod

Spring Boot REST Mini Project | Things to be covered in the mini project:- Layers Modules: Employee Dependencies:- PUT – Full/most of the part updatePATCH- partial update @Query: Used for select operation@Query + @Modifying: Used for non-select operation @Transaction – [commit/rollback]:- Incase of our custom query (not for predefined JPA methods), we must write this