SpringBoot统一填充请求参数

一、前言

​ 在日常开发中，发起请求后，后端常常会因为前端请求参数的不完整而去填充数据，通过分析得到填充的数据Top1的为tenantId（租户Id），此id可以根据token得到用户信息来填充。本次通过AOP的方式来优化这个问题

二、场景再现

2.1 手动填充数据

累计100多次的手动填充，还有一部分会忘记填充参数

三、优化

3.1 定义 AOP 切面

根据对项目请求的分析，此类现象98%出现在Post请求中，本次以PostMapping请求为切入点

@Aspect
@Component
public class RequestParamsLoad {

    private static final String PARAMNAME = "tenantId";

    @Around("@annotation(org.springframework.web.bind.annotation.PostMapping)")
    public Object around(ProceedingJoinPoint point) throws Throwable {
        return point.proceed();
    }
}

3.2 获取请求参数

@Aspect
@Component
public class RequestParamsLoad {

    private static final String PARAMNAME = "tenantId";

    @Around("@annotation(org.springframework.web.bind.annotation.PostMapping)")
    public Object around(ProceedingJoinPoint point) throws Throwable {
        UserVo user = RedisUtils.getUser();
        if (point.getArgs().length > 0) {
            MethodSignature signature = (MethodSignature) point.getSignature();
            HandlerMethod handlerMethod = new HandlerMethod(point.getTarget(), signature.getMethod());
            MethodParameter[] methodParameters = handlerMethod.getMethodParameters();
        }
        return point.proceed();
    }
}

3.3 过滤请求参数

@Aspect
@Component
public class RequestParamsLoad {

    private static final String PARAMNAME = "tenantId";

    @Around("@annotation(org.springframework.web.bind.annotation.PostMapping)")
    public Object around(ProceedingJoinPoint point) throws Throwable {
        UserVo user = RedisUtils.getUser();
        if (point.getArgs().length > 0) {
            MethodSignature signature = (MethodSignature) point.getSignature();
            HandlerMethod handlerMethod = new HandlerMethod(point.getTarget(), signature.getMethod());
            MethodParameter[] methodParameters = handlerMethod.getMethodParameters();
            for (MethodParameter parameter : methodParameters) {
                try {
                    Class<?> aClass = point.getArgs()[parameter.getParameterIndex()].getClass();
                    Class<?> superclass = aClass.getSuperclass();
                    boolean aFields = Arrays.asList(aClass.getDeclaredFields()).stream().map(f -> f.getName()).collect(Collectors.toList()).contains(PARAMNAME);
                    boolean sFields = Arrays.asList(superclass.getDeclaredFields()).stream().map(f -> f.getName()).collect(Collectors.toList()).contains(PARAMNAME);
                    if (aFields || sFields){
                        Field traceId = aFields ? aClass.getDeclaredField(PARAMNAME) : superclass.getDeclaredField(PARAMNAME);
                        traceId.setAccessible(true);
                        traceId.set(point.getArgs()[parameter.getParameterIndex()], user.getTenantId());
                    }
                } catch (Exception e) {
                    return point.proceed();
                }
            }
        }
        return point.proceed();
    }

3.4 效果