微項目:一步一步帶你使用SpringBoot入門(一)

微項目:一步一步帶你使用SpringBoot入門(一)javascript

 

最近放假了,休息的時候不忘寫個小項目來玩玩。
若是有須要一塊兒手動作項目的朋友能夠和我一塊兒作這個小項目。
作到哪爲所欲爲。也就一週的事哈哈。
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開發環境#

  • JDK1.8
  • JetBrain InteliJ

傻瓜式啓動項目#

打開newProject 而後單擊Spring Initializr而後一直next
html

在這裏肯定好包名之類的vue

在這裏不用單擊任何東西,直接next就行
java

在這裏咱們能夠看到項目建起來了。mysql

咱們直接點啓動,就能把項目跑起來。

OK,至此咱們就完成了SpringBoot的搭建。ios

我要將其開源,所以咱們須要將這個項目放到Github上面。
git

首先share it
而後憑直覺一直往下點就能夠了。github

項目地址在這:https://github.com/GodofOrange/anonymousweb

我會持續更新文章。
若是有興趣的同窗能夠給個star

項目需求#

我想趁着國慶作一個匿名傾吐煩惱的APP,其實整個想法實現起來蠻簡單的,可是若是僅僅使用mysql那就沒有什麼意義了,所以我將使用jpa+redis+kafka+ngnix組裝一個高可用性的後端。

整個項目呢,我打算使用敏捷開發方式,一點一點的集成到這個項目裏面。

SpringBoot+JPA作持久層#

MYSQL的環境相信你們都會有的,那我這裏直接給出數據表(注意ORM技術不用建表)

id title content update summary hot
BIGINT varchar(255) LONGTEXT TIMESTAMP TEXT BIGINT

數據庫建立腳本:

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CREATE DATABASE anonymous DEFAULT CHARSET utf8mb4;

OK,如今數據庫已經建起來了。那麼咱們接下來導入JPA的依賴吧。

在pom文件下引入如下文件。

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<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> 

而後修改配置文件。

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spring.datasource.url=jdbc:mysql://127.0.0.1:3306/anonymous?serverTimezone=UTC&useSSL=true&allowMultiQueries=true&characterEncoding=utf8 spring.datasource.username=root spring.datasource.password=123456 spring.jpa.show-sql=true spring.jpa.database=mysql spring.jpa.hibernate.ddl-auto=update spring.jpa.database-platform=org.hibernate.dialect.MySQL57InnoDBDialect

隨後啓動,觀察是否報錯。

若是沒報錯,會正常退出那就一切OK.

下面咱們來建立表

新建類Wall.java

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package cn.baldorange.anonymous.entity; import javax.persistence.*; import java.util.Date; @Entity(name = "wall") public class Wall { public Wall(){ } public Wall(String title, String content, Date up_time, String summary, String hot) { this.title = title; this.content = content; this.up_time = up_time; this.summary = summary; this.hot = hot; } @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = "id",columnDefinition="BIGINT COMMENT '主鍵,自動生成'") private String id; @Column(name = "title",columnDefinition="VARCHAR(255)") private String title; @Column(name = "content",columnDefinition="LONGTEXT") private String content; @Column(name = "up_time",columnDefinition="TIMESTAMP") private Date up_time; @Column(name = "summary",columnDefinition="TEXT") private String summary; @Column(name = "hot",columnDefinition = "BIGINT") private String hot; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public Date getUp_time() { return up_time; } public void setUp_time(Date up_time) { this.up_time = up_time; } public String getSummary() { return summary; } public void setSummary(String summary) { this.summary = summary; } public String getHot() { return hot; } public void setHot(String hot) { this.hot = hot; } @Override public String toString() { return "Wall{" + "id='" + id + '\'' + ", title='" + title + '\'' + ", content='" + content + '\'' + ", up_time=" + up_time + ", summary='" + summary + '\'' + ", hot='" + hot + '\'' + '}'; } } 

新建接口

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package cn.baldorange.anonymous.repository; import cn.baldorange.anonymous.entity.Wall; import org.springframework.data.jpa.repository.JpaRepository; public interface WallRepo extends JpaRepository<Wall,String> { } 

SpringTest文件

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package cn.baldorange.anonymous; import cn.baldorange.anonymous.entity.Wall; import cn.baldorange.anonymous.repository.WallRepo; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; import java.util.Date; @RunWith(SpringRunner.class) @SpringBootTest public class AnonymousApplicationTests { @Autowired WallRepo wallRepo; @Test public void contextLoads() { wallRepo.save(new Wall("測試","文章",new Date(),"摘要","0")); System.out.println(wallRepo.findById("1")); } } 

運行結果以下所示:

到此DAO層的就結束了。

咱們Commit後直接推上去

這就完成了一次代碼提交


下面是關於SpringBoot整合其餘項目的解決方法。可做爲擴展參考


swagger引入#

Swagger是一個接口文檔工具,依照Swagger能夠0配置開發接口。不過要注意,Swagger是基於SpringBoot1.47版本開發的,而SpringBoot如今基本都是是2+。
若是要選用restful支持,只能將SpringBoot退出到1+版本。
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maven引入#

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<dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger2</artifactId> <version>2.9.2</version> </dependency> <dependency> <groupId>io.springfox</groupId> <artifactId>springfox-swagger-ui</artifactId> <version>2.9.2</version> </dependency>

Swagger配置文檔#

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import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import springfox.documentation.builders.ApiInfoBuilder; import springfox.documentation.builders.PathSelectors; import springfox.documentation.builders.RequestHandlerSelectors; import springfox.documentation.spi.DocumentationType; import springfox.documentation.spring.web.plugins.Docket; import springfox.documentation.swagger2.annotations.EnableSwagger2; @Configuration @EnableSwagger2 public class swaggerConfig { @Bean Docket docket(){ return new Docket(DocumentationType.SWAGGER_2) .select() .apis(RequestHandlerSelectors.any()) .paths(PathSelectors.any()) .build() .apiInfo(new ApiInfoBuilder().description("項目").build()); } }

接口配置#

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import io.swagger.annotations.Api; import io.swagger.annotations.ApiOperation; import org.just.computer.mathproject.Entity.Advertisement; import org.just.computer.mathproject.Service.AdvertisementService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import java.util.List; @RestController @Api(tags ="廣告") @RequestMapping("/Advertisement/") public class AdvertisementController { @Autowired AdvertisementService advertisementService; @ApiOperation(value ="得到全部廣告") @GetMapping("/getAllAdvertisement") public List<Advertisement> getAllAdvertisement(){ return advertisementService.getAllAdvertisement(); } @ApiOperation(value = "添加廣告") @GetMapping("/addAdvertisement") public Boolean getAllAdvertisement(@RequestParam String img, @RequestParam String href){ try { advertisementService.addAdvertisement(img,href); return true; }catch (Exception e){ return false; } } @ApiOperation(value = "刪除廣告") @GetMapping("/deleteAdvertisement") public Boolean deleteAdvertisementById(Integer id){ try{ advertisementService.deleteAdvertisementById(id); return true; }catch (Exception e){ return false; } } } 

本地運行後訪問這裏便可訪問
或者到ip:端口/swagger-ui.html
運行結果以下

SpringBoot引入websocket#


maven 依賴#

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<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-websocket</artifactId> </dependency>

WebSocketConfig 配置文件#

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import org.springframework.context.annotation.Configuration; import org.springframework.messaging.simp.config.MessageBrokerRegistry; import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker; import org.springframework.web.socket.config.annotation.StompEndpointRegistry; import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer; @Configuration @EnableWebSocketMessageBroker public class WebSocketConfig implements WebSocketMessageBrokerConfigurer { @Override public void configureMessageBroker(MessageBrokerRegistry config){ config.enableSimpleBroker("/topic"); config.setApplicationDestinationPrefixes("/app"); } @Override public void registerStompEndpoints(StompEndpointRegistry registry){ registry.addEndpoint("/chat").setAllowedOrigins("*").withSockJS(); } } 

配置了以後基本上不用作其餘的配置了
setAllowedOrigins()爲跨域函數

而後是Controller#

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import org.just.computer.mathproject.Bean.Message; import org.springframework.messaging.handler.annotation.MessageMapping; import org.springframework.messaging.handler.annotation.SendTo; import org.springframework.stereotype.Controller; import java.security.Principal; import java.util.Date; @Controller public class GreetingController { @MessageMapping("/hello") @SendTo("/topic/greetings") public Message greeting(String content, Principal pl) throws Exception{ Message message = new Message(); message.setContent(content.substring(1,content.length()-1)); message.setData(new Date().toString()); message.setName(pl.getName()); return message; } }

這裏的Principal 爲SpringSecurity相關知識,目的是經過session得到用戶名。
到此爲止,SpringBoot的配置已經沒了

Vue經過stompClient使用webSocket#


package.json#

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"dependencies": { "@tinymce/tinymce-vue": "^3.0.1", "axios": "^0.19.0", "echarts": "^4.2.1", "element-ui": "^2.11.1", "net": "^1.0.2", "nprogress": "^0.2.0", "sockjs-client": "^1.4.0", "stompjs": "^2.3.3", "tinymce": "^4.8.5", "tinymce-vue": "^1.0.0", "vue": "^2.5.2", "vue-axios": "^2.1.4", "vue-echarts": "^4.0.3", "vue-router": "^3.0.1", "vue-stomp": "0.0.5" }

必定要填加的有vue-stomp sockjs-client stompjs這三個
想用的地方直接引入。

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import SockJS from 'sockjs-client' import Stomp from 'webstomp-client'

vue中完整代碼以下#

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<template> <div> <input type="text" v-model="text"> <button @click="sendMessage">發送消息</button> <div class="bubble"> </div> <div> <div v-for="(data,key) in datas" :key="key"> {{data.content}} </div> </div> </div> </template> <script> import SockJS from 'sockjs-client' import Stomp from 'webstomp-client' export default { name: 'ChatRoom', data () { return { text: '', datas: [], stompClient: null } }, mounted () { if ('WebSocket' in window) { this.initWebSocket() } else { alert('當前瀏覽器 Not support websocket') } }, methods: { sendMessage () { this.stompClient.send('/app/hello', JSON.stringify(this.text), {}) }, initWebSocket () { this.connection() }, connection () { const socket = new SockJS(this.$baseUrl + '/chat') this.stompClient = Stomp.over(socket) this.stompClient.connect({}, (frame) => { this.stompClient.subscribe('/topic/greetings', (greeting) => { console.log(JSON.parse(greeting.body)) this.datas.push(JSON.parse(greeting.body)) }) }) } } } </script> <style scoped> </style> 

注意在這行代碼this.stompClient.send('/app/hello', JSON.stringify(this.text), {}) {}的位置,有的版本多是相反的。
運行結果以下所示

做者: 禿桔子

出處:http://www.javashuo.com/article/p-ckjtseal-bq.html

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