Java后端校验-使用hibernate-validator校验JavaBean

只进行前端校验及其不安全，规范的验证都是前后端都进行表单校验，下面介绍使用hibernate-validator进行后端校验。

1.添加相关依赖

    <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>4.3.1.Final</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.validation/validation-api -->
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>1.0.0.GA</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.jboss.logging/jboss-logging -->
        <dependency>
            <groupId>org.jboss.logging</groupId>
            <artifactId>jboss-logging</artifactId>
            <version>3.1.0.CR2</version>
        </dependency>

2.定义公共验证类

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import org.hibernate.validator.HibernateValidator;
/**
 * 
 * @author Leave
 *
 */
public class ValidationUtils {
    
    /**
     * 使用hibernate的注解来进行验证
     * 
     */
    private static Validator validator = Validation
            .byProvider(HibernateValidator.class).configure().failFast(true).buildValidatorFactory().getValidator();

    /**
     * 
     *
     * Task:
     * @param obj
     * @return
     * date: 2018年7月5日
     * @author pengLuo
     *
     */
    public static <T> Map<String,Object> validate(T obj) {
        StringBuffer buffer = new  StringBuffer(); //用于存储验证后的错误信息
        Map<String,Object> map = new HashMap<String, Object>();
        Set<ConstraintViolation<T>> constraintViolations = validator.validate(obj);
        // 抛出检验异常
        if (constraintViolations.size() > 0) {
             Iterator<ConstraintViolation<T>> iter = constraintViolations.iterator();  
             while  (iter.hasNext()) {  
                 String message = iter.next().getMessage();  
                 buffer.append(message);  
             }  
             map.put("isValid", false);
             map.put("msg", buffer.toString());
             return map;  
        }
        else {
            map.put("isValid", true);
            return map;
        }
    }
}

3.在JavaBean中使用注解定义验证规则

    @NotEmpty(message="姓名不能为空！")
    private String name;
    @Pattern(regexp = "\\d{3,4}-\\d{7,8}(-\\d{3,4})?", message = "电话号码格式错误")
    private String tel;
    @Pattern(regexp = "1[3|4|5|6|7|8|9]\\d{9}", message = "手机号码格式错误！")
    private String moble;
    @Pattern(regexp = "([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+", message = "邮箱格式错误！")
    private String email;

4.校验JavaBean，通过ValidationUtils的校验结果，可以详细的知道哪个字段验证失败，将结果返回给前端交互。

        ......//控制器或者服务中进行持久化之前校验
        Map<String,Object> valMap = ValidationUtils.validate(addressBook);
        //封装返回参数，例如status,msg,code等
        AliJson json = new AliJson();
        if((Boolean)valMap.get("isValid")){
            json = addressBookServices.saveAddressBook(addTxlUtils(request, addressBook));
        }else{
            json.getJsonFalse(json, valMap.get("msg").toString());
        }
        ......

常用的注解大家可以自己百度，谢谢，本人很菜，不接受批评，哈哈哈。