278 lines
9.1 KiB
Markdown
278 lines
9.1 KiB
Markdown
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因收到Google相关通知，网站将会择期关闭。相关通知内容
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11 WebFlux 实战图书管理系统
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前言
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本篇内容我们会实现如下图所示的城市管理系统，因为上面案例都用的是 City，所以这里直接使用城市作为对象，写一个简单的城市管理系统，如图所示：
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结构
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类似上面讲的工程搭建，新建一个工程编写此案例。工程如图：
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下面目录和上面类似，这边不重复讲解：
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pom.xml Maven 依赖配置
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application.properties 配置文件，配置 mongo 连接属性配置
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dao 数据访问层
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单击这里查看源代码。
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本文主要介绍：
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controller 控制层实现
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static 存放 css 图片静态资源
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templates 编写页面逻辑
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CityController 控制层
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使用注解驱动的模式来进行开发，代码如下：
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/**
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* city 控制层
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* <p>
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* Created by bysocket
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*/
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@Controller
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@RequestMapping(value = "/city")
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public class CityController {
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private static final String CITY_FORM_PATH_NAME = "cityForm";
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private static final String CITY_LIST_PATH_NAME = "cityList";
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private static final String REDIRECT_TO_CITY_URL = "redirect:/city";
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@Autowired
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CityService cityService;
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@RequestMapping(method = RequestMethod.GET)
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public String getCityList(final Model model) {
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model.addAttribute("cityList", cityService.findAll());
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return CITY_LIST_PATH_NAME;
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}
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@RequestMapping(value = "/create", method = RequestMethod.GET)
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public String createCityForm(final Model model) {
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model.addAttribute("city", new City());
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model.addAttribute("action", "create");
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return CITY_FORM_PATH_NAME;
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}
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@RequestMapping(value = "/create", method = RequestMethod.POST)
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public String postCity(@ModelAttribute City city) {
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cityService.insertByCity(city);
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return REDIRECT_TO_CITY_URL;
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}
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@RequestMapping(value = "/update/{id}", method = RequestMethod.GET)
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public String getCity(@PathVariable Long id, final Model model) {
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final Mono<City> city = cityService.findById(id);
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model.addAttribute("city", city);
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model.addAttribute("action", "update");
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return CITY_FORM_PATH_NAME;
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}
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@RequestMapping(value = "/update", method = RequestMethod.POST)
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public String putBook(@ModelAttribute City city) {
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cityService.update(city);
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return REDIRECT_TO_CITY_URL;
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}
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@RequestMapping(value = "/delete/{id}", method = RequestMethod.GET)
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public String deleteCity(@PathVariable Long id) {
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cityService.delete(id);
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return CITY_LIST_PATH_NAME;
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}
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}
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可以创建不同功能的控制层，来处理不同的 HTTP 业务请求，比如 CityFrontController、CityAdminController 等分别处理不同场景的问题。
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getCityList 方法：处理“/city”的 GET 请求，用来获取 City 列表。
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getCity 方法：处理“/city/update/{id}”的 GET 请求，用来获取 City 信息。
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postCity 方法：处理“/book/create”的 POST 请求，用来新建 Book 信息；通过 @ModelAttribut 绑定实体参数，也通过 @RequestBody @RequestParam 传递参数。
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putCity 方法：处理“/update”的 PUT 请求，用来更新 City 信息，并使用 redirect 重定向到列表页面。
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cityForm 提交表单页面
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表单页面如下：
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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<script type="text/javascript" th:src="@{https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js}"></script>
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<link th:href="@{https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css}" rel="stylesheet"/>
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<link th:href="@{/css/default.css}" rel="stylesheet"/>
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<link rel="icon" th:href="@{/images/favicon.ico}" type="image/x-icon"/>
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<meta charset="UTF-8"/>
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<title>城市管理</title>
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</head>
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<body>
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<div class="contentDiv">
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<legend>
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<strong>城市管理</strong>
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</legend>
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<form th:action="@{/city/{action}(action=${action})}" method="post" class="form-horizontal">
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<div class="form-group">
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<label for="city_id" class="col-sm-2 control-label">城市编号:</label>
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<div class="col-xs-4">
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<input type="text" class="form-control" id="city_id" name="id" th:value="${city.id}"/>
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</div>
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</div>
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<div class="form-group">
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<label for="city_name" class="col-sm-2 control-label">城市名称:</label>
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<div class="col-xs-4">
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<input type="text" class="form-control" id="city_name" name="cityName" th:value="${city.cityName}"/>
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</div>
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</div>
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<div class="form-group">
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<label for="city_description" class="col-sm-2 control-label">城市描述:</label>
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<div class="col-xs-4">
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<input class="form-control" id="city_description" rows="3" name="description"
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th:value="${city.description}" />
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</div>
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</div>
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<div class="form-group">
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<label for="city_provinceId" class="col-sm-2 control-label">省份编号:</label>
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<div class="col-xs-4">
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<input type="text" class="form-control" id="city_provinceId" name="provinceId" th:value="${city.provinceId}"
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/>
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</div>
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</div>
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<div class="form-group">
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<div class="col-sm-offset-2 col-sm-10">
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<input class="btn btn-primary" type="submit" value="提交"/>
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<input class="btn" type="button" value="返回" onclick="history.back()"/>
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</div>
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</div>
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</form>
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</div>
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</body>
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</html>
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利用的是 Thymeleaf 语法，上面章节也讲过具体使用方法，这里实现新增城市和更新城市两个操作。巧妙利用了 action 字段去动态判断请求是新增还是更新的控制层方法，然后进行 form 表单提交。
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cityList 城市列表页面
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列表页面代码如下：
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<!DOCTYPE html>
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<html lang="zh-CN">
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<head>
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<script type="text/javascript" th:src="@{https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js}"></script>
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<link th:href="@{https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css}" rel="stylesheet"/>
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<link th:href="@{/css/default.css}" rel="stylesheet"/>
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<link rel="icon" th:href="@{/images/favicon.ico}" type="image/x-icon"/>
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<meta charset="UTF-8"/>
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<title>城市列表</title>
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</head>
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<body>
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<div class="contentDiv">
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<table class="table table-hover table-condensed">
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<legend>
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<strong>城市列表</strong>
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</legend>
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<thead>
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<tr>
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<th>城市编号</th>
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<th>城市名称</th>
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<th>描述</th>
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<th>省份编号</th>
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<th>管理</th>
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</tr>
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</thead>
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<tbody>
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<tr th:each="city : ${cityList}">
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<th scope="row" th:text="${city.id}"></th>
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<td><a th:href="@{/city/update/{cityId}(cityId=${city.id})}" th:text="${city.cityName}"></a></td>
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<td th:text="${city.description}"></td>
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<td th:text="${city.provinceId}"></td>
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<td><a class="btn btn-danger" th:href="@{/city/delete/{cityId}(cityId=${city.id})}">删除</a></td>
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</tr>
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</tbody>
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</table>
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<div><a class="btn btn-primary" href="/city/create" role="button">新增城市</a></div>
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</div>
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</body>
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</html>
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这里编写了一个列表对象的循环和简单的页面跳转逻辑，下面看看这两个页面组合使用的运行场景。
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运行工程
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一个 CRUD 的 Spring Boot Webflux 工程就开发完毕了，下面运行工程验证一下。使用 IDEA 右侧工具栏，点击 Maven Project Tab 选项，单击使用下 Maven 插件的 install 命令；或者使用命令行的形式，在工程根目录下，执行 Maven 清理和安装工程的指令：
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cd springboot-webflux-10-book-manage-sys
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mvn clean install
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在控制台中看到成功的输出：
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... 省略
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[INFO] ------------------------------------------------------------------------
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[INFO] BUILD SUCCESS
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[INFO] ------------------------------------------------------------------------
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[INFO] Total time: 01:30 min
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[INFO] Finished at: 2017-10-15T10:00:54+08:00
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[INFO] Final Memory: 31M/174M
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[INFO] ------------------------------------------------------------------------
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在 IDEA 中执行 Application 类启动，任意正常模式或者 Debug 模式，可以在控制台看到成功运行的输出：
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... 省略
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2018-04-10 08:43:39.932 INFO 2052 --- [ctor-http-nio-1] r.ipc.netty.tcp.BlockingNettyContext : Started HttpServer on /0:0:0:0:0:0:0:0:8080
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2018-04-10 08:43:39.935 INFO 2052 --- [ main] o.s.b.web.embedded.netty.NettyWebServer : Netty started on port(s): 8080
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2018-04-10 08:43:39.960 INFO 2052 --- [ main] org.spring.springboot.Application : Started Application in 6.547 seconds (JVM running for 9.851)
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打开浏览器，输入地址：http://localhost:8080/city，即打开城市列表页面：
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然后新增，或者单击城市名称修改，到表单提交页面：
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总结
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这里，初步实现了小案例城市管理系统，基本满足日常的 CRUD 业务流程操作。上手教程只是上手，具体复杂逻辑，欢迎一起多交流学习。
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