SpringBoot使用validation做參數(shù)校驗的實現(xiàn)步驟

更新時間：2021年05月07日 10:38:56 作者：小小小LIN子

這篇文章主要介紹了SpringBoot使用validation做參數(shù)校驗的實現(xiàn)步驟，幫助大家更好的理解和學習使用SpringBoot，感興趣的朋友可以了解下

1.添加依賴

直接添加 hibernate-validator

<dependency>
            <groupId>org.hibernate.validator</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>6.0.2.Final</version>
        </dependency>

添加spring-boot-starter-validation

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
            <version>1.4.0.RELEASE</version>
        </dependency>

添加spring-boot-starter-web

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

2. 配置文件，如果想要設置fail_fast屬性的話，true表示有一個參數(shù)出錯即返回，默認的時檢驗所有的參數(shù)，那么必須要有配置文件

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參數(shù)驗證配置
 */
@Configuration
public class ValidatorConfig extends WebMvcConfigurerAdapter {


    @Bean
    public Validator validator() {
        ValidatorFactory validatorFactory = Validation.byProvider(HibernateValidator.class)
                .configure()
                // 將fail_fast設置為true即可，如果想驗證全部，則設置為false或者取消配置即可
                .failFast(true)
//                .addProperty("hibernate.validator.fail_fast", "true")
                .buildValidatorFactory();

        return validatorFactory.getValidator();
    }

    /**
     * requestParam方式的校驗
     * @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是對requestParam起作用

繼承WebMvcConfigurerAdapter 并且重寫getValidator()方法，是讓spring的請求校驗Validator使用我們上邊的validator，讓設置的failFast生效，具體可參考org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport#mvcValidator方法

3.統(tǒng)一異常處理

/**
     * hibernate-valid實體類形式接受參數(shù)驗證失敗
     * @param ex
     * @return
     */
    @ExceptionHandler(BindException.class)
    @ResponseBody
    public WebResult validationErrorHandler(BindException ex) {
        List<String> collect = ex.getBindingResult().getAllErrors()
                .stream()
                .map(ObjectError::getDefaultMessage)
                .collect(Collectors.toList());
        return new WebResult(Errors.INCORRECT_PARAM_FORMAT.getError(), StringUtils.join(collect, ";"));

    }

    /**
     * hibernate-valid實體類形式接受參數(shù)驗證失敗
     * @param ex
     * @return
     */
    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseBody
    public WebResult validationErrorHandler(MethodArgumentNotValidException ex) {
        List<String> collect = ex.getBindingResult().getAllErrors()
                .stream()
                .map(ObjectError::getDefaultMessage)
                .collect(Collectors.toList());
        return new WebResult(Errors.INCORRECT_PARAM_FORMAT.getError(), StringUtils.join(collect, ";"));

    }



    /**
     * RequestParam方式參數(shù)校驗
     * @param ex
     * @return
     */
    @ExceptionHandler(ConstraintViolationException.class)
    @ResponseBody
    public WebResult validationErrorHandler(ConstraintViolationException ex) {
        List<String> errorInformation = ex.getConstraintViolations()
                .stream()
                .map(ConstraintViolation::getMessage)
                .collect(Collectors.toList());
        return new WebResult(Errors.INCORRECT_PARAM_FORMAT.getError(),StringUtils.join(errorInformation, ";"));
    }