1.添加依赖
直接添加 hibernate-validator
org.hibernate.validator hibernate-validator 6.0.2.Final
添加spring-boot-starter-validation
org.springframework.boot spring-boot-starter-validation 1.4.0.RELEASE
添加spring-boot-starter-web
org.springframework.boot spring-boot-starter-web
2. 配置文件
如果想要设置fail_fast属性的话，true表示有一个参数出错即返回，默认的时检验所有的参数，那么必须要有配置文件
import org.hibernate.validator.HibernateValidator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.validation.beanvalidation.MethodValidationPostProcessor;
import org.springframework.validation.beanvalidation.SpringValidatorAdapter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
/**
* hibernate参数验证配置
*/
@Configuration
public class ValidatorConfig extends WebMvcConfigurerAdapter {
@Bean
public Validator validator() {
ValidatorFactory validatorFactory = Validation.byProvider(HibernateValidator.class)
.configure()
// 将fail_fast设置为true即可，如果想验证全部，则设置为false或者取消配置即可
.failFast(true)
// .addProperty("hibernate.validator.fail_fast", "true")
.buildValidatorFactory();
return validatorFactory.getValidator();
}
/**
* requestParam方式的校验
* @return
*/
@Bean
public MethodValidationPostProcessor methodValidationPostProcessor() {
MethodValidationPostProcessor methodValidationPostProcessor = new MethodValidationPostProcessor();
methodValidationPostProcessor.setValidator(validator());
return methodValidationPostProcessor;
}
@Override
public org.springframework.validation.Validator getValidator() {
return new SpringValidatorAdapter(validator());
}
}其中methodValidationPostProcessor是对requestParam起作用
继承WebMvcConfigurerAdapter 并且重写getValidator()方法，是让spring的请求校验Validator使用我们上边的validator，让设置的failFast生效，具体可参考org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport#mvcValidator方法
3.统一异常处理
/**
* hibernate-valid实体类形式接受参数验证失败
* @param ex
* @return
*/
@ExceptionHandler(BindException.class)
@ResponseBody
public WebResult validationErrorHandler(BindException ex) {
List collect = ex.getBindingResult().getAllErrors()
.stream()
.map(ObjectError::getDefaultMessage)
.collect(Collectors.toList());
return new WebResult(Errors.INCORRECT_PARAM_FORMAT.getError(), StringUtils.join(collect, ";"));
}
/**
* hibernate-valid实体类形式接受参数验证失败
* @param ex
* @return
*/
@ExceptionHandler(MethodArgumentNotValidException.class)
@ResponseBody
public WebResult validationErrorHandler(MethodArgumentNotValidException ex) {
List collect = ex.getBindingResult().getAllErrors()
.stream()
.map(ObjectError::getDefaultMessage)
.collect(Collectors.toList());
return new WebResult(Errors.INCORRECT_PARAM_FORMAT.getError(), StringUtils.join(collect, ";"));
}
/**
* RequestParam方式参数校验
* @param ex
* @return
*/
@ExceptionHandler(ConstraintViolationException.class)
@ResponseBody
public WebResult validationErrorHandler(ConstraintViolationException ex) {
List errorInformation = ex.getConstraintViolations()
.stream()
.map(ConstraintViolation::getMessage)
.collect(Collectors.toList());
return new WebResult(Errors.INCORRECT_PARAM_FORMAT.getError(),StringUtils.join(errorInformation, ";"));
} 4.使用
如果是
@RequestParam这样直接写参数校验的话，在类上或者对应方法上加上Validated注解，如果是实体类接受的话，在参数中的实体前加上@Valid即可
