錯誤方式：

    /**
     * 參與方Controller中：更新角色快取
     */
    @PostMapping(value = "/cacheSysUserRole")
    public Result<?> cacheSysUserRole(@RequestParam("userRoleList") List<SysUserRole> userRoleList) {
        cacheService.cacheSysUserRole(userRoleList);
        return success();
    }

    /**
 

     * 呼叫方Feign介面中：更新角色快取
     *
     * @param userRoleList List<SysUserRole>
     * @return Result<?>
     */
    @PostMapping(value = "/gateway/gateway-cache/cacheSysUserRole")
    Result<?> cacheSysUserRole(@RequestParam("userRoleList") List<SysUserRole> userRoleList);

正確方式：

    /**
     * 參與方Controller中：更新角色快取
     */
    @PostMapping(value = "/cacheSysUserRole")
    public Result<?> cacheSysUserRole(@RequestBody List<SysUserRole> userRoleList) {
        cacheService.cacheSysUserRole(userRoleList);
        return success();
    }

    /**
     * 發起方Feign介面中：更新角色快取
     *
     * 
 
@param userRoleList List<SysUserRole>
     * @return Result<?>
     */
    @PostMapping(value = "/gateway/gateway-cache/cacheSysUserRole")
    Result<?> cacheSysUserRole(@RequestBody List<SysUserRole> userRoleList);

總結：方法使用@PostMapping，引數使用@RequestBody。