Fix Cannot Load Driver Class: com.mysql.jdbc.driver in Spring Boot

1. Introduction The “can not find driver exception” with “com.mysql.jdbc.driver" means that the Spring Boot application can not load the…

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@Context Complex Source Mappings Example

1. Introduction The org.mapstruct.Context annotation from MapStruct, a Java annotation processor for generating type-safe bean mapping code, marks a parameter…

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Map an Empty String to Null Using MapStruct Example

1. Introduction An empty string (“”) is the String object with an intentional blank value. Null is a literal used…

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Copy Specific Fields via Spring BeanUtils.copyProperties Example

1. Introduction In this example, I will demonstrate all the available methods to copy specific fields via BeanUtils.copyProperties in a…

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cURL Request to HTTP Request Conversion Example

1. Introduction The Client URL (cURL) is a tool for transferring data from or to a server using URLs. It…

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WireMock with Spring Boot Example

1. Introduction WireMock is a powerful HTTP mock server that stubs and verifies HTTP requests. It provides a controlled test…

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Closing Scanner Java Example

1. Introduction The java.util.Scanner class can read input from System.in, File, InputStream, Path, Readable, String, etc. It implements the Closeable…

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Read an External Properties File in Maven

1. Introduction Reading external properties in a maven project is useful when accessing secure credential configuration, or logging settings, etc.…

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JDK_JAVA_OPTIONS vs JAVA_TOOL_OPTIONS

1. Introduction JDK_JAVA_OPTIONS and JAVA_TOOL_OPTIONS are environment variables used to pass Java Virtual Machine (JVM) options to configure the JVM…

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