mysql-connector-java: unknown was not found
The IntelliJ cannot find the mysql-connector-java dependency and hits error "unknown was not found"? pom.xml <dependency> <groupId>mysql</groupId>...
View ArticleHow to change user agent in wget
This article shows how to use the -U (uppercase U) option to change the user agent in wget command. Terminal wget -U {user-agent} {location} Change user agent in wget The below command changes the wget...
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Spring Data JPA Paging and Sorting example
This article shows how to do Spring Data JPA paging and sorting using the PagingAndSortingRepository interface. Technologies used: Spring Boot 3.1.2 Spring Data JPA H2 in-memory database Java 17 Maven...
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Spring Boot @ConditionalOnProperty Example
In Spring Boot, we can use the @ConditionalOnProperty annotation to conditionally register the beans based on the property value in the application.properties or application.yml file. This article will...
View ArticleHow to restart Nginx on macOS
We open a Terminal and use the one-liner command sudo nginx -s stop && sudo nginx to restart the Nginx on macOS. Restart the Nginx service. Terminal sudo nginx -s stop && sudo nginx...
View ArticleSpring Boot @DynamicPropertySource Example
In Spring Boot, we can use @DynamicPropertySource to dynamically register or override property values in the ApplicationContext for integration tests. Tables of contents: 1. Testing with...
View ArticleSpring Boot @ServiceConnection Example
Spring Boot 3.1 introduced @ServiceConnection to enable the Spring Boot’s auto-configuration to use the service connection details to connect to a remote service (Testcontainers). Tables of contents:...
View ArticleJackson – Java 8 date/time type `java.time.LocalDate` not supported by default
Try Jackson to convert an object containing the Java 8 time APIs like LocalDate to a JSON formatted string and hits the errors Java 8 date/time typejava.time.LocalDatenot supported by default Book.java...
View ArticleSpring Boot CommandLineRunner Example
This article tells what is CommandLineRunner and different ways of implementing it or use it in Spring Boot. Table of contents: 1. What is CommandLineRunner? 2. Implementing CommandLineRunner 3. @Bean...
View ArticleHow to Run a CommandLineRunner Bean Conditionally in Spring Boot
This article shows different ways to run a CommandLineRunner bean conditionally in a Spring Boot application. Table of contents: 1. Using @ConditionalOnProperty 2. Using Environment 3. Using Spring...
View ArticleHow to ignore a field with Jackson
In Jackson, we can use @JsonIgnore to ignore a single field, @JsonIgnoreProperties to ignore multiple fields and @JsonIgnoreType to ignore a specified type during JSON serialization and...
View ArticleConvert Java Objects to JSON with Jackson
This article will show you how to convert Java objects to JSON with Jackson. Table of contents: 1. Setup Jackson 2. Jackson quick examples 3. Convert Java Object to JSON using Jackson 4. Convert JSON...
View ArticleWrite JSON to a file with Jackson
This article shows you write JSON to a file with Jackson. Table of contents: 1. Download Jackson 2. Define a Java Object 3. Write JSON to a File 4. Download Source Code 5. References P.S Tested with...
View ArticleHow to map a subset of a JSON file using Jackson
This article shows how to map a subset of a JSON file using Jackson. Table of contents: 1. Download Jackson 2. Map a subset of a JSON file 3. Define Java Classes that reflect JSON structure 4. Ignoring...
View ArticleJackson and Lombok examples
This article shows how to use Jackson and Lombok together. Table of contents: 1. Download Jackson and Lombok 2. Model with Lombok annotations 3. Parse JSON using Jackson 5. Download Source Code 6....
View ArticleHow to parse JSON using Moshi
This article shows how to parse JSON using Moshi. Table of contents: 1. Download Moshi 2. Parse JSON using Moshi 3. Parse JSON Array using Moshi 4. Convert Java Object to JSON String 5. Download Source...
View ArticleHow to write JSON to a file using Moshi
This article shows how to write JSON to a file using Moshi. Table of contents: 1. Download Moshi 2. Write JSON to a file using Moshi 3. Read JSON from a file using Moshi 4. Download Source Code 6....
View ArticleMoshi – java.math.BigDecimal requires explicit JsonAdapter to be registered
Moshi does not have built-in adapters to process types like java.math.BigDecimal; we need to manually provide a custom adapter to handle the BigDecimal type. Table of contents: 1. Download Moshi 2....
View ArticleHow to pretty print JSON using Moshi
This article shows how to use Moshi’s JsonAdaptor indent method to enable the pretty print JSON. Table of contents: 1. Download Moshi 2. Compact print JSON (Default) 3. Pretty print JSON using Moshi 4....
View ArticleMoshi java.time.LocalDate requires explicit JsonAdapter to be registered
Moshi does not have built-in adapters to process types like Java 8 date time APIs java.time.* or JSR-310; we need to manually provide a custom adapter to handle the Java 8 date time type. This article...
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