2019-09-10 18:12:12
浏览数 (1)
1. 必填参数统一处理
1.1. 需求
- 项目使用交易代码的形式,反射调用执行类,统一入口和出口类,相当于直接调用服务层,例如:
代码语言:javascript
复制 /**
* 获取订单详情3003101009
*/
ResponseReport getOrderDetail(RequestReport requestReport);
- 我们知道如果后台调用入口在Controller,且入口参数灵活填写,那么可以使用SpringMVC自带的参数验证方式,通过注解如@NotNull @Size等来限制入参,错误直接返回
- 现在我调用入口参数统一了,也不在controller层,但要实现相同的功能,也就是参数验证,特别是必填项
1.2. 解决
1.2.1. 服务层
- 我的想法同样是通过注解来解决,只是注解的实现方法需要自己实现
- 通过aop切服务层固定入参列表的方法,判断是否存在注解
代码语言:javascript
复制@Override
@CheckUnfilled(value={"order_id"})
public ResponseReport getOrderDetail(RequestReport requestReport) {
ResponseReport responseReport = new ResponseReport();
Map<String, Object> reqParams = JSON.parseObject(requestReport.getBody().toString(), Map.class);
Object id = reqParams.get("order_id");
String orderId = id.toString();
OrderInfo orderInfo = orderInfoExtDao.selectByPrimaryKey(orderId);
OrderInfoExt orderInfoExt = new OrderInfoExt();
orderInfoExt.setAddress(orderInfo.getHospital() " " orderInfo.getBed());
BeanUtils.copyProperties(orderInfo, orderInfoExt);
return responseReport.returnSuccessResult(orderInfoExt, "获取订单详情成功", requestReport);
}
1.2.2. 注解方法
代码语言:javascript
复制/**
* @author laoliangliang
* @date 2019/1/10 16:57
*/
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface CheckUnfilled {
String[] value() default {};
}
1.2.3. 注解实现aop
代码语言:javascript
复制package com.zhiyis.framework.aop;
import com.alibaba.fastjson.JSON;
import com.zhiyis.common.report.RequestReport;
import com.zhiyis.common.report.ResponseReport;
import com.zhiyis.framework.annotation.CheckUnfilled;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.stereotype.Component;
import org.springframework.util.ReflectionUtils;
import java.lang.reflect.Method;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
* @author laoliangliang
* @date 2019/1/10 17:04
*/
@Slf4j
@Component
@Aspect
public class CheckUnfilledAspect {
@Around("execution(com.zhiyis.common.report.ResponseReport com.zhiyis.framework.service.impl..*.*(com.zhiyis.common.report.RequestReport))")
public Object checkUnfilled(ProceedingJoinPoint joinPoint) {
Object clazz = joinPoint.getTarget();
String methodName = joinPoint.getSignature().getName();
Object[] args = joinPoint.getArgs();
RequestReport requestReport = (RequestReport) args[0];
Map<String, Object> reqParams = JSON.parseObject(JSON.toJSONString(requestReport.getBody()), Map.class);
Method method = ReflectionUtils.findMethod(clazz.getClass(), methodName, RequestReport.class);
CheckUnfilled annotation = AnnotationUtils.findAnnotation(method, CheckUnfilled.class);
if(annotation != null){
String[] value = annotation.value();
Set<String> keys = reqParams.keySet();
Set<String> unfilledSet = new HashSet<>();
for (String key : value) {
if (!keys.contains(key)) {
unfilledSet.add(key);
}
}
if (unfilledSet.size() > 0) {
ResponseReport responseReport = new ResponseReport();
return responseReport.returnError("9999", JSON.toJSONString(unfilledSet) "为必填参数");
}
}
try {
return joinPoint.proceed();
} catch (Throwable e) {
log.error("tradeCode接口错误", e);
}
return null;
}
}
1.3. 测试
- 带orderId参数
- 不带orderId参数
- 上述接口只为测试所写,这种没有任何验证的在正式环境存在开关关闭执行