This provides a Spring-Boot-Starter to include JsonSchemaValidation with the help of the https://github.com/networknt/json-schema-validator -library.
Include the starter into you're project.
You need to add jitpack to your pom.xml because this project is not available in the official maven repository.
<repositories>
<repository>
<id>jitpack.io</id>
<url>https://jitpack.io</url>
</repository>
</repositories>
Add the json-schema-validation-starter-dependency to your pom.xml
<dependency>
<groupId>com.github.JanLoebel</groupId>
<artifactId>json-schema-validation-starter</artifactId>
<version>2.2.1</version>
</dependency>
After that simply create a json-schema and put it into e.g.: resources/jsonschema/book.json.
The last step is now to let your entity know that it should be validated and which schema it should use.
@JsonSchemaValidation("classpath:jsonschema/book.json")
public class Book {
private String title;
private String author;
}
Alternatively, you need to add this annotation in your controller like below. This is helpful when you generate your classes from a schema or can't edit them.
@RestController
@RequestMapping("/books")
public BooksConroller {
@PostMapping
public ResponseEntity<Book> createBook(@RequestBody @JsonSchemaValidation("classpath:jsonschema/book.json") Book bookDto) {
//...
return bookDto;
}
}
The schemas are read by a bean that implements the JsonSchemaProvider interface. By default, the DefaultJsonSchemaProvider is used, which can load schemas by a URL or from the classpath. If necessary, a custom schema provider can be implemented and configured:
@ConditionalOnProperty(prefix = "json.schema.validation", name = "schemaProvider", havingValue = "custom")
@Component
public class CustomJsonSchemaProvider implements JsonSchemaProvider {
JsonSchema loadSchema(String url) {
// Create and return a JSON schema...
}
void handleValidationMessages(Collection<ValidationMessage> validationMessages) {
// Handle validation messages...
}
}
Configure the schema provider in application.properties:
json.schema.validation.schemaProvider=custom
Head over to http://github.com/JanLoebel/json-schema-validation-starter-example to checkout the sample project.
Please feel free to improve or modify the code and open a Pull-Request! Any contribution is welcome :)
MIT License
Copyright (c) 2019 Jan Löbel
See LICENSE file for details.