ValidateUtils

import com.pasc.medical.core.base.exception.BusinessException;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.util.ReflectionUtils;

import javax.validation.*;
import java.lang.reflect.Field;
import java.util.List;
import java.util.Set;


public class ValidateUtils {

    /**
     * 校验 Bean
     * @param t
     * @param <T>
     * @return
     */
    public static  <T> String validate(T t){
        ValidatorFactory vFactory = Validation.buildDefaultValidatorFactory();
        Validator validator = vFactory.getValidator();
        Set<ConstraintViolation<T>> set = validator.validate(t);
        if (set.size() > 0) {
            StringBuilder validateError = new StringBuilder();
            int i = 1;
            for (ConstraintViolation<T> val : set) {
                validateError.append(val.getMessage());
                if (i < set.size()) {
                    validateError.append(",");
                }
                i++;
            }

            return validateError.toString();
        }

        return null;
    }

    /**
     * 校验 List 集合
     * @param list
     * @param param
     * @param paramName
     * @param <T>
     */
    public static <T> void validate(List<T> list,String param,String paramName){
        if(CollectionUtils.isEmpty(list)){
            throw new BusinessException("101401","校验参数为空");
        }

        String validateStr;
        StringBuilder validateBuilder = new StringBuilder();
        for(T t : list){
            validateStr = validate(t);

            if(StringUtils.isNotBlank(validateStr)){

                validateBuilder.append(paramName).append(":")
                                .append(getParamValue(t,param)).append(",")
                                .append(validateStr.toString()).append("\n");
            }
        }

        // 有异常直接抛出异常
        if(validateBuilder.length() > 0){
            throw new BusinessException("101402",validateBuilder.toString());
        }
    }

    public static <T> Object getParamValue(T t,String param){
       Field field =  ReflectionUtils.findField(t.getClass(),param);
       field.setAccessible(true);
       Object value = ReflectionUtils.getField(field,t);

       return value;
    }
}