参考

SpringBoot-jsr303 参数校验

Unable to create a Configuration, because no Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath

方案1

pom.xml

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>cn.hutool</groupId>
        <artifactId>hutool-all</artifactId>
        <version>5.7.5</version>
    </dependency>
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
        <version>2.0.1.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate.validator</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>6.0.13.Final</version>
    </dependency>
    <dependency>
        <groupId>org.glassfish</groupId>
        <artifactId>javax.el</artifactId>
        <version>3.0.0</version>
    </dependency>
</dependencies>

测试类- BatchParam

package com.sharding.demo.DTO;
import cn.hutool.extra.validation.ValidationUtil;
import lombok.Data;
import org.apache.commons.collections4.CollectionUtils;
import javax.validation.ConstraintViolation;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
import javax.validation.groups.Default;
import java.util.Set;
import java.util.stream.Collectors;
@Data
public class BatchParam {
    @NotNull(message = "天数不能为空")
    private Integer day;
    @NotBlank(message = "来源系统不能为空")
    private String sourceSystem;
    /**
     * 参数合法性校验
     *
     * @return 合法返回验证通过,否则返回错误信息
     */
    public String validParams() {
        Set<ConstraintViolation<BatchParam>> errorSet = ValidationUtil.validate(this, Default.class);
        if (!CollectionUtils.isEmpty(errorSet)) {
            return errorSet.stream().map(ConstraintViolation::getMessage).collect(Collectors.joining(";"));
        }
        return "验证通过";
    }
    public static void main(String[] args) {
        BatchParam batchParam = new BatchParam();
        System.out.println(batchParam.validParams());
        System.out.println("-----------");
        batchParam.setDay(1);
        System.out.println(batchParam.validParams());
        System.out.println("-----------");
        batchParam.setSourceSystem("mysql");
        System.out.println(batchParam.validParams());
    }
}

测试结果

11:55:31.129 [main] INFO org.hibernate.validator.internal.util.Version -- HV000001: Hibernate Validator 6.0.13.Final
来源系统不能为空;天数不能为空
-----------
来源系统不能为空
-----------
验证通过

错误-Unable to create a Configuration, because no Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath.

一开始只引用了 javax.validation 包

<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
    <version>2.0.1.Final</version>
</dependency>

执行报下面的错误

Exception in thread "main" java.lang.ExceptionInInitializerError
    at com.sharding.demo.DTO.BatchParam.validParams(BatchParam.java:27)
    at com.sharding.demo.DTO.BatchParam.main(BatchParam.java:37)
Caused by: javax.validation.NoProviderFoundException: Unable to create a Configuration, because no Bean Validation provider could be found. Add a provider like Hibernate Validator (RI) to your classpath.
    at javax.validation.Validation$GenericBootstrapImpl.configure(Validation.java:291)
    at javax.validation.Validation.buildDefaultValidatorFactory(Validation.java:103)
    at cn.hutool.extra.validation.ValidationUtil.<clinit>(ValidationUtil.java:27)
    ... 2 more
进程已结束，退出代码为 1

加入了下面两个包，执行正常

<dependency>
    <groupId>org.hibernate.validator</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>6.0.13.Final</version>
</dependency>
<dependency>
    <groupId>org.glassfish</groupId>
    <artifactId>javax.el</artifactId>
    <version>3.0.0</version>
</dependency>

方案2

校验工具类-ValidationUtils

package com.sharding.demo.utils;
import org.apache.commons.collections4.CollectionUtils;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
public class ValidationUtils {
    private static final Validator VALIDATOR = Validation.buildDefaultValidatorFactory().getValidator();
    public  static <T> List<String> validate(T  obj){
        List<String>  resultList = new ArrayList<>();
        Set<ConstraintViolation<T>> validateSet = VALIDATOR.validate(obj);
        if(CollectionUtils.isEmpty(validateSet)){
            return  resultList;
        }
        for(ConstraintViolation<T> cs:validateSet){
            resultList.add(cs.getMessage());
        }
        return resultList;
    }
}

测试类-BatchParam

package com.sharding.demo.DTO;
import cn.hutool.extra.validation.ValidationUtil;
import com.sharding.demo.utils.ValidationUtils;
import lombok.Data;
import org.apache.commons.collections4.CollectionUtils;
import javax.validation.ConstraintViolation;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
import javax.validation.groups.Default;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
@Data
public class BatchParam {
    @NotNull(message = "天数不能为空")
    private Integer day;
    @NotBlank(message = "来源系统不能为空")
    private String sourceSystem;
}

测试结果

public static void main(String[] args) {
    BatchParam batchParam = new BatchParam();
    List<String> errorMsg = ValidationUtils.validate(batchParam);
    if (CollectionUtils.isNotEmpty(errorMsg)) {
        System.out.println(errorMsg);
    }
    System.out.println("-----------");
    batchParam.setDay(1);
    errorMsg = ValidationUtils.validate(batchParam);
    if (CollectionUtils.isNotEmpty(errorMsg)) {
        System.out.println(errorMsg);
    }
    System.out.println("-----------");
    batchParam.setSourceSystem("mysql");
    errorMsg = ValidationUtils.validate(batchParam);
    if (CollectionUtils.isNotEmpty(errorMsg)) {
        System.out.println(errorMsg);
    }
}

输出

[来源系统不能为空, 天数不能为空]
-----------
[来源系统不能为空]
-----------