快速构建一个权限项目

Posted 2020-11-25 My丶Ou

接着上一章的,接下来我们所写的校验工具-BeanValidator开发,好了跟着我们下面的代码来实现:

首先我们需要先在pom.xml引入依赖:

<!-- validator -->
    <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>5.3.6.Final</version>
    </dependency>

引入这两个依赖之后我们就可以写自己的validator了

在我们的util包下创建一个类BeanValidator:

package cn.oyc.util;

import cn.oyc.exception.ParamException;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
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.*;

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());
        }
    }
}

编写如下代码后我们可以创建一个测试的值,添加包param,类为TestVo:

package cn.oyc.param;

import lombok.Getter;
import lombok.Setter;
import org.hibernate.validator.constraints.NotBlank;
import org.hibernate.validator.constraints.NotEmpty;

import javax.validation.constraints.NotNull;
import java.util.List;

@Getter
@Setter
public class TestVo {

    @NotBlank
    private String msg;

    @NotNull
    private Integer id;

    @NotEmpty
    private List<String> str;
}

在到我们的exception包下建一个ParamException类

package cn.oyc.exception;

public class ParamException extends RuntimeException {
    public ParamException() {
        super();
    }

    public ParamException(String message) {
        super(message);
    }

    public ParamException(String message, Throwable cause) {
        super(message, cause);
    }

    public ParamException(Throwable cause) {
        super(cause);
    }

    protected ParamException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
        super(message, cause, enableSuppression, writableStackTrace);
    }
}

这里我们还需要在打开pom.xml引入我们常用的工具类包:

<!-- tools -->
    <dependency>
      <groupId>commons-collections</groupId>
      <artifactId>commons-collections</artifactId>
      <version>3.2.2</version>
    </dependency>
    <dependency>
      <groupId>commons-codec</groupId>
      <artifactId>commons-codec</artifactId>
      <version>1.13</version>
    </dependency>

然后在我们的TestController下写测试代码

package cn.oyc.controller;


import cn.oyc.common.JsonData;
import cn.oyc.common.SpringExceptionResolver;
import cn.oyc.exception.ParamException;
import cn.oyc.param.TestVo;
import cn.oyc.util.BeanValidator;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections.MapUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.Map;

@Controller
@RequestMapping("/text")
@Slf4j
public class TestController {
    private final Logger logger = LoggerFactory.getLogger(TestController.class);
    @RequestMapping("/hello.json")
    @ResponseBody
    public JsonData hello(){
        logger.info("hello");
        return JsonData.success("hello,permission");
    }

    @RequestMapping("/validate.json")
    @ResponseBody
    public JsonData validate(TestVo vo) throws ParamException {
        logger.info("validate");
        BeanValidator.check(vo);
        return JsonData.success("test validate");
    }

}

校验工具这一块我们就讲到这里了,后续会持续更新