Java tutorial
/* * Tencent is pleased to support the open source community by making Tars available. * * Copyright (C) 2016 THL A29 Limited, a Tencent company. All rights reserved. * * Licensed under the BSD 3-Clause License (the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * * https://opensource.org/licenses/BSD-3-Clause * * Unless required by applicable law or agreed to in writing, software distributed * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR * CONDITIONS OF ANY KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. */ package com.qq.tars.web.controller.notify; import com.google.common.base.Preconditions; import com.qq.common.ServletRequestParameterException; import com.qq.common.WrappedController; import com.qq.tars.service.NotifyService; import org.apache.commons.lang3.StringUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import java.util.List; import java.util.stream.Collectors; @Controller public class NotifyController extends WrappedController { @Autowired private NotifyService notifyService; @RequestMapping(value = "server/api/server_notify_list", produces = { "application/json" }) @ResponseBody public List<ServerNotifyView> serverNotifyList(@RequestParam(value = "tree_node_id") String treeNodeId, @RequestParam(value = "cur_page", required = false, defaultValue = "0") int curPage, @RequestParam(value = "page_size", required = false, defaultValue = "0") int pageSize) throws Exception { try { int count = StringUtils.countMatches(treeNodeId, '.'); Preconditions.checkArgument(count == 1 || count == 4, "?%s?", "tree_node_id"); } catch (IllegalArgumentException e) { throw new ServletRequestParameterException(e); } return notifyService.getServerNotifyList(treeNodeId, curPage, pageSize).stream() .map(notify -> mapper.map(notify, ServerNotifyView.class)).collect(Collectors.toList()); } }