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HTML
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<a href="/专栏/案例上手 Spring Boot WebFlux（完）/01 导读：课程概要.md.html">01 导读：课程概要.md.html</a>
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<a href="/专栏/案例上手 Spring Boot WebFlux（完）/04 WebFlux 整合 MongoDB.md.html">04 WebFlux 整合 MongoDB.md.html</a>
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<div><h1>06 WebFlux 中 Thymeleaf 和 MongoDB 实践</h1>
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<h3>前言</h3>
|
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<p>本节内容主要还是总结上面两篇内容的操作，并实现一个复杂查询的小案例，那么没安装 MongoDB 的可以进行下面的安装流程。</p>
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<p>Docker 安装 MognoDB 并启动如下。</p>
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<p>（1）创建挂载目录：</p>
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<pre><code>docker volume create mongo_data_db
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docker volume create mongo_data_configdb
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</code></pre>
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<p>（2）启动 MognoDB：</p>
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<pre><code>docker run -d \
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--name mongo \
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-v mongo_data_configdb:/data/configdb \
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-v mongo_data_db:/data/db \
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-p 27017:27017 \
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mongo \
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--auth
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</code></pre>
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<p>（3）初始化管理员账号：</p>
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<pre><code>docker exec -it mongo mongo admin
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// 容器名 // mongo命令 数据库名
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# 创建最高权限用户
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db.createUser({ user: 'admin', pwd: 'admin', roles: [ { role: "root", db: "admin" } ] });
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||
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</code></pre>
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||
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<p>（4）测试连通性：</p>
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<pre><code>docker run -it --rm --link mongo:mongo mongo mongo -u admin -p admin --authenticationDatabase admin mongo/admin
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||
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||
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||
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||
</code></pre>
|
||
|
||
<h3>MognoDB 基本操作</h3>
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||
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<p>类似 MySQL 命令，显示库列表：</p>
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||
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<pre><code>show dbs
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|
||
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||
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||
</code></pre>
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<p>使用某数据库：</p>
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<pre><code>use admin
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||
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||
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||
</code></pre>
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<p>显示表列表：</p>
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<pre><code>show collections
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||
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||
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||
</code></pre>
|
||
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<p>如果存在 city 表，格式化显示 city 表内容：</p>
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<pre><code>db.city.find().pretty()
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||
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||
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</code></pre>
|
||
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<p>如果已经安装后，只要重启即可。</p>
|
||
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<p>查看已有的镜像：</p>
|
||
|
||
<pre><code> docker images
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<p><img src="assets/bc15410321f52ee046966e3ecad9f8281524711.png" alt="file" /></p>
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||
|
||
<p>然后 docker start mogno 即可，Mongo 是镜像唯一名词。</p>
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||
|
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<h3>结构</h3>
|
||
|
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<p>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：</p>
|
||
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<p><img src="assets/cbf51d78c7955bca4fcc32863ac482881524710.png" alt="file" /></p>
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<p>核心目录如下：</p>
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||
|
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<ul>
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<li>pom.xml Maven 依赖配置</li>
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<li>application.properties 配置文件，配置 mongo 连接属性配置</li>
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||
|
||
<li>dao 数据访问层</li>
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||
|
||
<li>controller 展示层实现</li>
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||
|
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</ul>
|
||
|
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<h3>新增 POM 依赖与配置</h3>
|
||
|
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<p>在 pom.xml 配置新的依赖：</p>
|
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|
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<pre><code> <!-- Spring Boot 响应式 MongoDB 依赖 -->
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
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</dependency>
|
||
|
||
|
||
|
||
<!-- 模板引擎 Thymeleaf 依赖 -->
|
||
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<dependency>
|
||
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-thymeleaf</artifactId>
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</dependency>
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<p>类似配了 MySQL 和 JDBC 驱动，肯定得去配置数据库。在 application.properties 配置中启动 MongoDB 配置。</p>
|
||
|
||
<p>数据库名为 admin，账号密码也为 admin。</p>
|
||
|
||
<pre><code>spring.data.mongodb.host=localhost
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spring.data.mongodb.database=admin
|
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||
spring.data.mongodb.port=27017
|
||
|
||
spring.data.mongodb.username=admin
|
||
|
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spring.data.mongodb.password=admin
|
||
|
||
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||
|
||
</code></pre>
|
||
|
||
<h3>MongoDB 数据访问层 CityRepository</h3>
|
||
|
||
<p>修改 CityRepository 类，代码如下：</p>
|
||
|
||
<pre><code>import org.spring.springboot.domain.City;
|
||
|
||
import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
|
||
|
||
import org.springframework.stereotype.Repository;
|
||
|
||
|
||
|
||
@Repository
|
||
|
||
public interface CityRepository extends ReactiveMongoRepository<City, Long> {
|
||
|
||
|
||
|
||
Mono<City> findByCityName(String cityName);
|
||
|
||
|
||
|
||
}
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<p>CityRepository 接口只要继承 ReactiveMongoRepository 类即可。</p>
|
||
|
||
<p>这里实现了通过城市名找出唯一的城市对象方法：</p>
|
||
|
||
<pre><code>Mono<City> findByCityName(String cityName);
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<p>复杂查询语句实现也很简单，只要依照接口实现规范，即可实现对应 MySQL 的 where 查询语句。这里 findByxxx 的 xxx 可以映射任何字段，包括主键等。</p>
|
||
|
||
<p>接口的命名是遵循规范的，常用命名规则如下：</p>
|
||
|
||
<table>
|
||
|
||
<thead>
|
||
|
||
<tr>
|
||
|
||
<th align="left">关键字</th>
|
||
|
||
<th align="left">方法命名</th>
|
||
|
||
</tr>
|
||
|
||
</thead>
|
||
|
||
<tbody>
|
||
|
||
<tr>
|
||
|
||
<td align="left">And</td>
|
||
|
||
<td align="left">findByNameAndPwd</td>
|
||
|
||
</tr>
|
||
|
||
<tr>
|
||
|
||
<td align="left">Or</td>
|
||
|
||
<td align="left">findByNameOrSex</td>
|
||
|
||
</tr>
|
||
|
||
<tr>
|
||
|
||
<td align="left">Is</td>
|
||
|
||
<td align="left">findById</td>
|
||
|
||
</tr>
|
||
|
||
<tr>
|
||
|
||
<td align="left">Between</td>
|
||
|
||
<td align="left">findByIdBetween</td>
|
||
|
||
</tr>
|
||
|
||
<tr>
|
||
|
||
<td align="left">Like</td>
|
||
|
||
<td align="left">findByNameLike</td>
|
||
|
||
</tr>
|
||
|
||
<tr>
|
||
|
||
<td align="left">NotLike</td>
|
||
|
||
<td align="left">findByNameNotLike</td>
|
||
|
||
</tr>
|
||
|
||
<tr>
|
||
|
||
<td align="left">OrderBy</td>
|
||
|
||
<td align="left">findByIdOrderByXDesc</td>
|
||
|
||
</tr>
|
||
|
||
<tr>
|
||
|
||
<td align="left">Not</td>
|
||
|
||
<td align="left">findByNameNot</td>
|
||
|
||
</tr>
|
||
|
||
</tbody>
|
||
|
||
</table>
|
||
|
||
<h3>处理器类 Handler 和控制器类 Controller</h3>
|
||
|
||
<p>修改下 Handler，代码如下：</p>
|
||
|
||
<pre><code>@Component
|
||
|
||
public class CityHandler {
|
||
|
||
|
||
|
||
private final CityRepository cityRepository;
|
||
|
||
|
||
|
||
@Autowired
|
||
|
||
public CityHandler(CityRepository cityRepository) {
|
||
|
||
this.cityRepository = cityRepository;
|
||
|
||
}
|
||
|
||
|
||
|
||
public Mono<City> save(City city) {
|
||
|
||
return cityRepository.save(city);
|
||
|
||
}
|
||
|
||
|
||
|
||
public Mono<City> findCityById(Long id) {
|
||
|
||
|
||
|
||
return cityRepository.findById(id);
|
||
|
||
}
|
||
|
||
|
||
|
||
public Flux<City> findAllCity() {
|
||
|
||
|
||
|
||
return cityRepository.findAll();
|
||
|
||
}
|
||
|
||
|
||
|
||
public Mono<City> modifyCity(City city) {
|
||
|
||
|
||
|
||
return cityRepository.save(city);
|
||
|
||
}
|
||
|
||
|
||
|
||
public Mono<Long> deleteCity(Long id) {
|
||
|
||
cityRepository.deleteById(id);
|
||
|
||
return Mono.create(cityMonoSink -> cityMonoSink.success(id));
|
||
|
||
}
|
||
|
||
|
||
|
||
public Mono<City> getByCityName(String cityName) {
|
||
|
||
return cityRepository.findByCityName(cityName);
|
||
|
||
}
|
||
|
||
}
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<p>新增对应的方法，直接返回 Mono 对象，不需要对 Mono 进行转换，因为 Mono 本身是个对象，可以被 View 层渲染。继续修改控制器类 Controller，代码如下：</p>
|
||
|
||
<pre><code> @Autowired
|
||
|
||
private CityHandler cityHandler;
|
||
|
||
|
||
|
||
@GetMapping(value = "/{id}")
|
||
|
||
@ResponseBody
|
||
|
||
public Mono<City> findCityById(@PathVariable("id") Long id) {
|
||
|
||
return cityHandler.findCityById(id);
|
||
|
||
}
|
||
|
||
|
||
|
||
@GetMapping()
|
||
|
||
@ResponseBody
|
||
|
||
public Flux<City> findAllCity() {
|
||
|
||
return cityHandler.findAllCity();
|
||
|
||
}
|
||
|
||
|
||
|
||
@PostMapping()
|
||
|
||
@ResponseBody
|
||
|
||
public Mono<City> saveCity(@RequestBody City city) {
|
||
|
||
return cityHandler.save(city);
|
||
|
||
}
|
||
|
||
|
||
|
||
@PutMapping()
|
||
|
||
@ResponseBody
|
||
|
||
public Mono<City> modifyCity(@RequestBody City city) {
|
||
|
||
return cityHandler.modifyCity(city);
|
||
|
||
}
|
||
|
||
|
||
|
||
@DeleteMapping(value = "/{id}")
|
||
|
||
@ResponseBody
|
||
|
||
public Mono<Long> deleteCity(@PathVariable("id") Long id) {
|
||
|
||
return cityHandler.deleteCity(id);
|
||
|
||
}
|
||
|
||
|
||
|
||
private static final String CITY_LIST_PATH_NAME = "cityList";
|
||
|
||
private static final String CITY_PATH_NAME = "city";
|
||
|
||
|
||
|
||
@GetMapping("/page/list")
|
||
|
||
public String listPage(final Model model) {
|
||
|
||
final Flux<City> cityFluxList = cityHandler.findAllCity();
|
||
|
||
model.addAttribute("cityList", cityFluxList);
|
||
|
||
return CITY_LIST_PATH_NAME;
|
||
|
||
}
|
||
|
||
|
||
|
||
@GetMapping("/getByName")
|
||
|
||
public String getByCityName(final Model model,
|
||
|
||
@RequestParam("cityName") String cityName) {
|
||
|
||
final Mono<City> city = cityHandler.getByCityName(cityName);
|
||
|
||
model.addAttribute("city", city);
|
||
|
||
return CITY_PATH_NAME;
|
||
|
||
}
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<p>新增 getByName 路径，指向了新的页面 city。使用 @RequestParam 接收 GET 请求入参，接收的参数为 cityName，城市名称。视图返回值 Mono 或者 String 都行。</p>
|
||
|
||
<h3>Tymeleaf 视图</h3>
|
||
|
||
<p>然后编写两个视图 city 和 cityList，代码分别如下。</p>
|
||
|
||
<p>city.html：</p>
|
||
|
||
<pre><code><!DOCTYPE html>
|
||
|
||
<html lang="zh-CN">
|
||
|
||
<head>
|
||
|
||
<meta charset="UTF-8"/>
|
||
|
||
<title>城市</title>
|
||
|
||
</head>
|
||
|
||
|
||
|
||
<body>
|
||
|
||
|
||
|
||
<div>
|
||
|
||
|
||
|
||
<table>
|
||
|
||
<legend>
|
||
|
||
<strong>城市单个查询</strong>
|
||
|
||
</legend>
|
||
|
||
<tbody>
|
||
|
||
<td th:text="${city.id}"></td>
|
||
|
||
<td th:text="${city.provinceId}"></td>
|
||
|
||
<td th:text="${city.cityName}"></td>
|
||
|
||
<td th:text="${city.description}"></td>
|
||
|
||
</tbody>
|
||
|
||
</table>
|
||
|
||
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</body>
|
||
|
||
</html>
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<p>cityList.html：</p>
|
||
|
||
<pre><code><!DOCTYPE html>
|
||
|
||
<html lang="zh-CN">
|
||
|
||
<head>
|
||
|
||
<meta charset="UTF-8"/>
|
||
|
||
<title>城市列表</title>
|
||
|
||
</head>
|
||
|
||
|
||
|
||
<body>
|
||
|
||
|
||
|
||
<div>
|
||
|
||
|
||
|
||
<table>
|
||
|
||
<legend>
|
||
|
||
<strong>城市列表</strong>
|
||
|
||
</legend>
|
||
|
||
<thead>
|
||
|
||
<tr>
|
||
|
||
<th>城市编号</th>
|
||
|
||
<th>省份编号</th>
|
||
|
||
<th>名称</th>
|
||
|
||
<th>描述</th>
|
||
|
||
</tr>
|
||
|
||
</thead>
|
||
|
||
<tbody>
|
||
|
||
<tr th:each="city : ${cityList}">
|
||
|
||
<td th:text="${city.id}"></td>
|
||
|
||
<td th:text="${city.provinceId}"></td>
|
||
|
||
<td th:text="${city.cityName}"></td>
|
||
|
||
<td th:text="${city.description}"></td>
|
||
|
||
</tr>
|
||
|
||
</tbody>
|
||
|
||
</table>
|
||
|
||
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</body>
|
||
|
||
</html>
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<h3>运行工程</h3>
|
||
|
||
<p>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，单击 Maven Project Tab 按钮，然后单击使用下 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：</p>
|
||
|
||
<pre><code>cd springboot-webflux-5-thymeleaf-mongodb
|
||
|
||
mvn clean install
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<p>在控制台中看到成功的输出：</p>
|
||
|
||
<pre><code>... 省略
|
||
|
||
[INFO] ------------------------------------------------------------------------
|
||
|
||
[INFO] BUILD SUCCESS
|
||
|
||
[INFO] ------------------------------------------------------------------------
|
||
|
||
[INFO] Total time: 01:30 min
|
||
|
||
[INFO] Finished at: 2017-10-15T10:00:54+08:00
|
||
|
||
[INFO] Final Memory: 31M/174M
|
||
|
||
[INFO] ------------------------------------------------------------------------
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<p>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：</p>
|
||
|
||
<pre><code>... 省略
|
||
|
||
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
|
||
|
||
2018-04-10 08:43:39.935 INFO 2052 --- [ main] o.s.b.web.embedded.netty.NettyWebServer : Netty started on port(s): 8080
|
||
|
||
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)
|
||
|
||
|
||
|
||
</code></pre>
|
||
|
||
<p>打开 POST MAN 工具，开发必备，进行下面操作。</p>
|
||
|
||
<p>新增城市信息 POST http://127.0.0.1:8080/city：</p>
|
||
|
||
<p><img src="assets/f69fa5b09730de686ef4837824da48e71523883-1608971233683.png" alt="file" /></p>
|
||
|
||
<p>打开浏览器，访问 http://localhost:8080/city/getByName?cityName=杭州，可以看到如图的响应：</p>
|
||
|
||
<p><img src="assets/adfc7fd931e3c7a20f168a6eddc9c1481524710.png" alt="file" /></p>
|
||
|
||
<p>继续访问 http://localhost:8080/city/page/list，发现没有值，那么按照上一篇的内容插入几条数据即可有值，如图：</p>
|
||
|
||
<p><img src="assets/66e6502b86c02a83bf56daa93eb9bc1a1524186-1608971233702.png" alt="file" /></p>
|
||
|
||
<h3>总结</h3>
|
||
|
||
<p>这里初步实现了一个简单的整合，具体复杂的案例我们在后面的综合案例中实现，会很酷炫。下面整合 Redis，基于 Redis 可以实现常用的缓存、锁，下一篇我们将学习如何整合 Reids。</p>
|
||
|
||
</div>
|
||
|
||
</div>
|
||
|
||
<div>
|
||
|
||
<div style="float: left">
|
||
|
||
<a href="/专栏/案例上手 Spring Boot WebFlux（完）/05 WebFlux 整合 Thymeleaf.md.html">上一页</a>
|
||
|
||
</div>
|
||
|
||
<div style="float: right">
|
||
|
||
<a href="/专栏/案例上手 Spring Boot WebFlux（完）/07 WebFlux 整合 Redis.md.html">下一页</a>
|
||
|
||
</div>
|
||
|
||
</div>
|
||
|
||
|
||
|
||
</div>
|
||
|
||
</div>
|
||
|
||
</div>
|
||
|
||
</div>
|
||
|
||
|
||
|
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<a class="off-canvas-overlay" onclick="hide_canvas()"></a>
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window.dataLayer = window.dataLayer || [];
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function gtag() {
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dataLayer.push(arguments);
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gtag('js', new Date());
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gtag('config', 'G-NPSEEVD756');
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console.log(path)
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if (cookie.replace("/", "") !== "") {
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console.log(cookie)
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document.getElementById("tip").innerHTML = "<a href='" + cookie + "'>跳转到上次进度</a>"
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setCookie("lastPath", path)
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var d = new Date();
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d.setTime(d.getTime() + (180 * 24 * 60 * 60 * 1000));
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var expires = "expires=" + d.toGMTString();
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document.cookie = cname + "=" + cvalue + "; " + expires + ";path = /";
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function getCookie(cname) {
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var name = cname + "=";
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var ca = document.cookie.split(';');
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for (var i = 0; i < ca.length; i++) {
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if (c.indexOf(name) === 0) return c.substring(name.length, c.length);
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