1、首先要导入
<dependency> <groupId>javax.validation</groupId> <artifactId>validation-api</artifactId> <version>1.1.0.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>5.2.4.Final</version> </dependency>2、接着写工具类
package com.mmall.util;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.mmall.exception.ParamException;
import org.apache.commons.collections.MapUtils;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;
public class BeanValidator {
private static ValidatorFactory validatorFactory = Validation.buildDefaultValidatorFactory();
public static <T> Map<String, String> validate(T t, Class... groups) {
Validator validator = validatorFactory.getValidator();
Set validateResult = validator.validate(t, groups);
if (validateResult.isEmpty()) {
return Collections.emptyMap();
} else {
LinkedHashMap errors = Maps.newLinkedHashMap();
Iterator iterator = validateResult.iterator();
while (iterator.hasNext()) {
ConstraintViolation violation = (ConstraintViolation)iterator.next();
errors.put(violation.getPropertyPath().toString(), violation.getMessage());
}
return errors;
}
}
public static Map<String, String> validateList(Collection<?> collection) {
Preconditions.checkNotNull(collection);
Iterator iterator = collection.iterator();
Map errors;
do {
if (!iterator.hasNext()) {
return Collections.emptyMap();
}
Object object = iterator.next();
errors = validate(object, new Class[0]);
} while (errors.isEmpty());
return errors;
}
public static Map<String, String> validateObject(Object first, Object... objects) {
if (objects != null && objects.length > 0) {
return validateList(Lists.asList(first, objects));
} else {
return validate(first, new Class[0]);
}
}
public static void check(Object param) throws ParamException {
Map<String, String> map = BeanValidator.validateObject(param);
if (MapUtils.isNotEmpty(map)) {
throw new ParamException(map.toString());
}
}
}
3、校验类
package com.mmall.param; import lombok.Getter; import lombok.Setter; import org.hibernate.validator.constraints.NotBlank; import org.hibernate.validator.constraints.NotEmpty; import javax.validation.constraints.Max; import javax.validation.constraints.Min; import javax.validation.constraints.NotNull; import java.util.List; @Getter @Setter public class TestVo { @NotBlank private String msg; @NotNull(message = "id不可以为空") @Max(value = 10, message = "id 不能大于10") @Min(value = 0, message = "id 至少大于等于0") private Integer id; private List<String> str; }
4、controller接收前台传参
@RequestMapping("/validate.json")
@ResponseBody
public JsonData validate(TestVo vo) throws ParamException {
log.info("validate");
try {
Map<String,String> map = BeanValidator.validateObject(vo);
if(MapUtils.isNotEmpty(map)){
for(Map.Entry<String,String > entry:map.entrySet()){
log.info("{}-->{},",entry.getKey(),entry.getValue());
}
}
}catch (Exception e){
}
return JsonData.success("test validate");
}