import org.zalando.problem.validation.ConstraintViolationProblemModule; //导入依赖的package包/类
@Test
void shouldSerializeWithoutAutoDetect() throws JsonProcessingException {
    final ObjectMapper mapper = new ObjectMapper()
            .disable(MapperFeature.AUTO_DETECT_FIELDS)
            .disable(MapperFeature.AUTO_DETECT_GETTERS)
            .disable(MapperFeature.AUTO_DETECT_IS_GETTERS)
            .registerModule(new ProblemModule())
            .registerModule(new ConstraintViolationProblemModule());

    final Violation violation = new Violation("bob", "was missing");
    final ConstraintViolationProblem unit = new ConstraintViolationProblem(BAD_REQUEST, singletonList(violation));

    with(mapper.writeValueAsString(unit))
            .assertThat("status", is(400))
            .assertThat("type", is(ConstraintViolationProblem.TYPE_VALUE))
            .assertThat("title", is("Constraint Violation"))
            .assertThat("violations", hasSize(1))
            .assertThat("violations.*.field", contains("bob"))
            .assertThat("violations.*.message", contains("was missing"));
}
 

import org.zalando.problem.validation.ConstraintViolationProblemModule; //导入依赖的package包/类
@Test
void shouldSerializeCustomType() throws JsonProcessingException {
    final ObjectMapper mapper = new ObjectMapper()
            .registerModule(new ProblemModule())
            .registerModule(new ConstraintViolationProblemModule());

    final URI type = URI.create("foo");
    final ConstraintViolationProblem unit = new ConstraintViolationProblem(type, BAD_REQUEST, emptyList());

    with(mapper.writeValueAsString(unit))
            .assertThat("type", is("foo"));
}
 

import org.zalando.problem.validation.ConstraintViolationProblemModule; //导入依赖的package包/类
@Bean
ConstraintViolationProblemModule constraintViolationProblemModule() {
    return new ConstraintViolationProblemModule();
}