As I don't know what Order looks like, I'm going to make some assumptions in this answer. The big assumption I'm going to make is that you have an Integer id value in the class, which I can get using getId();. I'm also going to assume that the...

Java

Spring

Spring.NET

SpringREST

SpringMVC

springboot

Create GraphQL Based REST API Application using Spring Boot

14 Jul 2022 by Han Bo Sun

This tutorial will discuss how to create a rest service supports GraphQL query.

Loading Data in Batches for AngularJS and UI-Grid Display

14 Feb 2023 by Han Bo Sun

Loading data in batches and displaying using UI-Grid in an AngularJS based app

Fetching large volume of data from postgres db using spring boot rest api

4 Jul 2023 by Richard Deeming

Quote: I just want to count the results I can't return such data to the user there is no means I can count these values depending on these conditions provided Your code is loading all 4 million matching records into a list, simply to return...

How to track changes made in data tables between two access database files

26 Oct 2023 by Gerry Schmitz

Add a "timestamp" to the Access records; and use a new timestamp when you update and insert. You can't "delete" initially; you'll need to add a "delete" flag (and timestamp) so you can export "deleted" records; and purge / archive them later. You...

Request method 'GET' not supported, method not allowed

23 Aug 2020 by Nilnil Zen

i am new to webservice through spring bot. When i use @GetMapping method it works fine there is no issue,and i provide @DeleteMapping methoed it throw mw this type of error Request method "GET" not supported. how to solve this issue. i check...

SpringREST

springboot

One-to-many mapping between two entities showing null in table

28 Jan 2021 by Akash Tetme

Hello, I'm new to thymeleaf. I've two entities, Patient Doctor which have one-to-many relationship between them, when I tried to set one Doctor to Patient, its showing null. I'm sharing my entities and controller here. please give advice. ...

What's the best way to call all service instance method in spring cloud using nacos registry?

2 Jul 2021 by Member 10637246

I have four service instances,each instance have local cache.I use this code to call the method to refresh cache,but I find that each time it only call one service instance. How to change my code if I want to call all of four service instance to...

Spring

SpringREST

springboot

Swaggerui doesn't show pojo class in models area

17 Nov 2021 by Member 15435322

This is my swagger configuration class: package com.example.ecourtcustinfolast.config; import org.springframework.boot.web.servlet.FilterRegistrationBean; import org.springframework.context.annotation.Bean; import...

How to enable batch inserts in spring boot with mongo database

10 Feb 2023 by Office Systems

I'm having a spring boot application connected with Mongo DB now I want to enable spring batch how can I manage this withi spring data Mongo What I saw with Spring data JPA spring.jpa.properties.hibernate.generate_statistics=true...

How to compare month in spring mongo criteria of a column attribute

13 Mar 2023 by Office Systems

How can I compare month in spring mongo criteria with a hard corded value, month in criteria is in a spring format and the value is present in an integer format. This is what i have so far i just want to check for that month and group employee...

How to compare month in spring mongo criteria of a column attribute

13 Mar 2023 by Dave Kreskowiak

Think about your query. What does ".is(2)" mean? Is it the month number? The day of the month? How about the yes? Maybe the hour, minutes, or seconds? How is your code telling the database that the 2 is a month? Hint: It's not.

How to read mdb file results using item reader in spring batch

29 Mar 2023 by Office Systems

I want to read mdb file using spring batch Item Reader, I have managed to read the mdb file and the results I can see them in console but I'm not able to map this results into the reader object. Below is my sample code. What I have tried: ...

How to upload file direct to folder in a server without loading it to memory in spring boot

19 Apr 2023 by Office Systems

I want to upload large file more than 2gb to a particular folder in spring boot, the challenge I'm facing is that, after file upload from client application (Angular Application/ Postman) it takes more than 50seconds to hit the controller, after...

How to get values which do not exist in databse by comparing with the list values in spring boot

7 May 2023 by Office Systems

I am having a spring boot application which reads values from the Microsoft access file and then checks if the value exists in the database then gets updated or else inserted as the new record however I'm only getting these values present in the...

How to track changes made in data tables between two access database files

27 Oct 2023 by Office Systems

I'm fetching data from Microsoft access database file into PostgreSQL Database, then later some changes are added into Microsoft access database file and then re-uploaded into PostgreSQL Database as the latest dataset file with changes, now the...

Implementing data upload and read microservices project

17 Jan 2024 by Office Systems

I'm new to Micro-services architecture, I'm to develop a project using spring boot that gets data from API and stores that data into PostgreSQL db then computes and gets the sum of the data uploaded and sends that data into another database...

How can I loop and compare the data present between two arrays in spring boot

10 Mar 2024 by Office Systems

I have two arrays which both have data, what I want to do is to loop through each array and compare the data between the arrays one array is coming from the Post Method and another array has data from the database, so the comparison has to be...

How I post a request to springboot with json array and onetomany relationship

22 Dec 2021 by EdibIsic

1.User Class with OneToMany Annotation in relation to Roles class that can be many 2.Roles Class with @ManyToOne and @JoinColumn Annotation 3.Controller class with the endpoint 4.Postman request with Json Object throws an Exception, JSON parse...

Java

SpringREST

REST

Design UTF-8 Encoded Web Application With Spring Boot, AngularJS and MySQL

14 Apr 2021 by Han Bo Sun

Create a simple web app to support UTF-8 encoded strings

Streaming Media Files in Spring Boot Web Application

12 Sep 2022 by Han Bo Sun

How to stream a large file and support byte range seeking using Spring Boot

Deleting large volume of data at once in spring boot in fraction of a second

26 Apr 2023 by Office Systems

How can I delete large amount of data more than 10 million records in fraction of a second in spring boot project, the code I'm having right now takes more than 1 minute and 30s to delete these records. Below is the code I'm using to delete these...

Unknown column 'vms_contact_email' in 'field list'

21 Sep 2022 by Auto Samachar

I have vmscontactemail field in the database and models, when I debug the code it shows the above error when I execute that line at managerdetailsrepository.save What I have tried: DAO @Modifying @Transactional @Query("UPDATE...

I am facing the below error in my spring batch application

6 Dec 2022 by nagarhemant

Exception in thread "main" java.lang.AbstractMethodError: Receiver class ch.qos.logback.classic.util.DefaultJoranConfigurator does not define or inherit an implementation of the resolved method 'abstract void...

Fetching large volume of data from postgres db using spring boot rest api

4 Jul 2023 by Office Systems

I'm trying to fetch data using Spring Boot for my REST API from PostgreSQL Database, I have more than 30 million records in my database, the API takes a lot of time to pull data from the database and sometimes it results on time out error when...