In summary, WebClient and RestTemplate are two different HTTP clients that are designed for different use cases. Configuration: RestTemplate is typically configured with a RestTemplateBuilder, while web clients are configured using a WebClient.Builder.Serialization and Deserialization: RestTemplate relies on third-party libraries to serialize and deserialize objects, while web clients use Spring’s built-in serialization and deserialization capabilities.Error Handling: RestTemplate handles errors by throwing exceptions, while a web client uses reactive streams to propagate errors, making it easier to handle errors in a reactive way.Reactive vs Non-Reactive: RestTemplate is a traditional, non-reactive client, whereas web clients support reactive programming, which is a programming paradigm that allows for more efficient handling of large amounts of data. This means that multiple requests can be made simultaneously without blocking the main thread. Whereas a web client is an asynchronous client that provides a non-blocking approach to I/O.
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