spring rest api input validator

 spring api 

https://spring.io/guides/tutorials/rest/

https://www.baeldung.com/spring-boot-bean-validation

Test Code

@Test public void whenPostRequestToUsersAndValidUser_thenCorrectResponse() throws Exception { MediaType textPlainUtf8 = new MediaType(MediaType.TEXT_PLAIN, Charset.forName("UTF-8")); String user = "{\"name\": \"bob\", \"email\" : \"bob@domain.com\"}"; mockMvc.perform(MockMvcRequestBuilders.post("/users") .content(user) .contentType(MediaType.APPLICATION_JSON_UTF8)) .andExpect(MockMvcResultMatchers.status().isOk()) .andExpect(MockMvcResultMatchers.content() .contentType(textPlainUtf8)); } @Test public void whenPostRequestToUsersAndInValidUser_thenCorrectResponse() throws Exception { String user = "{\"name\": \"\", \"email\" : \"bob@domain.com\"}"; mockMvc.perform(MockMvcRequestBuilders.post("/users") .content(user) .contentType(MediaType.APPLICATION_JSON_UTF8)) .andExpect(MockMvcResultMatchers.status().isBadRequest()) .andExpect(MockMvcResultMatchers.jsonPath("$.name", Is.is("Name is mandatory"))) .andExpect(MockMvcResultMatchers.content() .contentType(MediaType.APPLICATION_JSON_UTF8)); } }

Mock Mvc

Data validation

• GUI - Client Data validation
• Application Services - Application Data Validation
• Database - Database Data Validation

Find a way in Spring Framework

• Spring Boot REST API Request Validation Examples
  

Rest Controller 

@validated

@RequestParam(required = true, defaultValue = ""

Reference

• Validation in Spring Boot
  
• REST API DATA VALIDATION
  

• Jakarta (Java) Bean Validation Home page
• Hibernate Validator Home page
• Java Bean Validation Annotations API Docs Reference

 

Related REST API Tutorials:

• Spring Boot REST API Validate Path Variables Examples
• Spring Boot REST API Validate Query Parameters Examples
• REST API Best Practices: How to Use the Right HTTP Methods and Status Codes
• How to Use curl for Testing REST APIs (Test CRUD Operations)
• Java RESTful Web Services Tutorial for Beginner with Jersey and Tomcat
• Java CRUD RESTful Web Services Examples with Jersey and Tomcat
• Spring Boot Hello World RESTful Web Services Tutorial
• Spring Boot RESTful CRUD API Examples with MySQL database
• Spring Boot File Download and Upload REST API Examples
• Spring Boot REST API CRUD with HATEOAS Tutorial