Spring Boot基本操作

1 Pom****檔案

1.1 spring-boot-starter-parent

表示當前pom檔案從spring-boot-starter-parent繼承下來，在spring-boot-starter-parent中提供了很多預設配置，

可以簡化我們的開發。 <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.4.RELEASE</version> <relativePath/>  </parent>

Java版本和編碼方式

<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.4.RELEASE</version> <relativePath/>  </parent> - 依賴管理spring-boot-dependencies <properties> <activemq.version>5.15.9</activemq.version> <antlr2.version>2.7.7</antlr2.version> <appengine-sdk.version>1.9.73</appengine-sdk.version> <artemis.version>2.6.4</artemis.version> ... </properties>

這樣比如使用starter-web的時候就不需要指定版本號 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>2.1.4.RELEASE</version> </dependency

使用自己的parent專案

這時候將依賴管理的問題放到dependencyManagement中。官網說明文件見：13.2.2 Using Spring Boot without the Parent POM

<dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>2.1.4.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement>

1.2 打包管理

使用mvn package打包的plugin。

<build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build>

1.3 Starters

官網見：13.5 Starters

Starters are a set of convenient dependency descriptors that you can include in your application. You get a one-stop shop for all the Spring and related technologies that you need without having to hunt through sample code and copy-paste loads of dependency descriptors. For example, if you want to get started using Spring and JPA for database access, include the spring-boot-starter-data-jpa dependency in your project.

官方starter命名 spring-boot-starter-*
自定義starter命名 thirdpartyproject-spring-boot-starter
spring-boot-web-starter 檢視其diagram，可以排除某個依賴

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> </exclusion> </exclusions> </dependency>

2 XXXApplication

2.1 @SpringBootApplication 官網見：18. Using the @SpringBootApplication Annotation 等同於@EnableAutoConfiguration，@ComponentScan和@Configuration 2.2 SpringApplication.run 官網見：23. SpringApplication 3 配置檔案 3.1 初步感受 server.port=9090 3.2 yml檔案 application.yml 3.3 給屬性注入值實體類Person和IDCard public class Person { private String name; private int age; private Date birthday; private String[] hobbies; private IDCard idCard; ... }

public class IDCard { private int id; private String number; }

yml注入寫法

person: name: Jack age: 17 birthday: 1997/06/01 hobbies: [code，sing，share] idCard: id: 1 number: 111

Person類增加註解 @Component @ConfigurationProperties(prefix="person")

測試

@Autowired private Person person;

如果Person類上報錯，在Pom檔案中加入如下依賴

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId</dependency

4 處理動靜態資源 4.1 動態資源官網見：90.2 Reload Templates without Restarting the Container templates resources目錄下有一個templates資料夾，可以將動態資源放到其中引入thymeleaf

<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> templates下新建test.html檔案 <html xmlns:th="http://www.thymeleaf.org"> <head> </head> <body> <span style="color:red; font-size:30pt" th:text="${str}"></span> </body> controller中return test @Controller @RequestMapping("/gupao") public class GupaoController { @RequestMapping("/hello") public String hello(Model model){ String str="hello spring boot"; //想要動態的顯示在網頁當中 model.addAttribute("str",str); //接下來的頁面是能夠動態顯示傳過來的資料 return "test"; } } 4.2 靜態資源 static資料夾在resources目錄下有一個static資料夾，可以將靜態資源放到其中，瀏覽器可以直接訪問。靜態資源其他存放資料夾 "classpath:/META-INF/resources/" "classpath:/resources/" "classpath:/static/" "classpath:/public/" WebMvcAutoConfiguration原始碼分析 WebMvcAutoConfiguration--->WebMvcAutoConfigurationAdapter.addResourceHandlers(xxx)---> `this.resourceProperties.getStaticLocations()` `return this.staticLocations;` `private String[] staticLocations = CLASSPATH_RESOURCE_LOCATIONS;` `private static final String[] CLASSPATH_RESOURCE_LOCATIONS = { "classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/" };` 自定義靜態資原始檔夾觀察 @ConfigurationProperties(prefix = "spring.resources", ignoreUnknownFields = false) public class ResourceProperties { 配置application.properties spring.resources.static-locations=classpath:/gupao/ 5 整合MyBatis 5.1 需求通過Spring Boot Web專案api介面的方式，整合MyBatis實現crud的操作。 5.2 建立Spring Boot Web專案重溫一下web專案建立的過程。 5.3 引入專案中需要的starter依賴 <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> 5.4 建立資料庫表 db_gupao_springboot--->t_user 5.5 建立domain/User物件 public class User { private int id; private String username; private String password; private String number; ... } 5.6 開發dao層 @Repository @Mapper public interface UserMapper { User find(String username); List<User> list(); int insert(User user); int delete(int id); int update(User user); } 5.7 開發service層 @Service public class UserService { @Autowired public UserMapper userMapper; public User findByUsername(String username){ return userMapper.find(username); } public List<User> listUser(){ return userMapper.list(); } public int insertUser(User user){ return userMapper.insert(user); } public int updateUser(User user){ return userMapper.update(user); } public int delete(int id){ return userMapper.delete(id); } } 5.8 開發controller層 @RestController @RequestMapping(value="/user",method = {RequestMethod.GET,RequestMethod.POST}) public class UserController { @Autowired private UserService userService; @RequestMapping("/listone") @ResponseBody public User listOne(String username){ return userService.findByUsername(username); } @RequestMapping("/listall") @ResponseBody public List<User> listAll(){ return userService.listUser(); } @RequestMapping(value="/add",method= RequestMethod.POST) @ResponseBody public String add(User user){ int result=userService.insertUser(user); if(result>=1) { return "新增成功"; }else{ return "新增失敗"; } } @RequestMapping(value="/update",method= RequestMethod.POST) @ResponseBody public String update(User user){ int result=userService.updateUser(user); if(result>=1) { return "修改成功"; }else{ return "修改失敗"; } } @RequestMapping(value="/delete",method= RequestMethod.GET) @ResponseBody public String delete(int id){ int result=userService.delete(id); if(result>=1) { return "刪除成功"; }else{ return "刪除失敗"; } } } 5.9 resources目錄下建立mapper資料夾---UserMapper.xml <?xml version = "1.0" encoding = "UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD com.example.Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.csdn.springbootmybatis.dao.UserMapper"> <resultMap id="result" type="com.gupao.springbootmybatis.domain.User"> <result property="username" column="username"/> <result property="password" column="password"/> <result property="number" column="number"/> </resultMap> <select id="find" resultMap="result"> SELECT * FROM t_user where username=#{username} </select> <select id="list" resultMap="result"> SELECT * FROM t_user </select> <insert id="insert" parameterType="com.gupao.springbootmybatis.domain.User" keyProperty="id" useGeneratedKeys="true"> INSERT INTO t_user ( id,username,password,number ) VALUES ( #{id}, #{username, jdbcType=VARCHAR}, #{password, jdbcType=VARCHAR}, #{number} ) </insert> <delete id="delete" parameterType="int"> delete from t_user where id=#{id} </delete> <update id="update" parameterType="com.gupao.springbootmybatis.domain.User"> update t_user set user.username=#{username},user.password=#{password},user.number=# {number} where user.id=#{id} </update> </mapper> 5.10 application.properties檔案配置 #資料來源 spring: datasource: url: jdbc:mysql://127.0.0.1:3306/boot?useUnicode=true&characterEncoding=UTF- 8&serverTimezone=UTC username: root password: 123456 driver-class-name: com.mysql.cj.jdbc.Driver #mybatis託管mapper檔案 mybatis: mapper-locations: classpath:mapper/*.xml 5.11 啟動專案測試查詢 http://localhost:8888/user/listone?username=Jack 全部查詢 http://localhost:8888/user/listall 增加 http://localhost:8888/user/add?id=3&username=AAA&password=111111&number=300 更新 http://localhost:8888/user/update?id=3&username=BBB 刪除 http://localhost:8888/user/delete?id=3 6 專案打包 jar包 mvn -Dmaven.test.skip -U clean install java -jar xxx.jar war包 <groupId>com.csdn</groupId> <artifactId>springboot-demo2</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> 7 Spring Boot in less than 10 minutes https://www.youtube.com/watch?v=lhkwLtDIMHI&feature=youtu.be BUILD ANYTHING WITH SPRING BOOT Spring Boot is the starting point for building all Spring-based applications. Spring Boot is designed to get you up and running as quickly as possible, with minimal upfront configuration of Spring. ![](https://oscimg.oschina.net/oscnet/4c5cf450bce8027f451d64d95524a4d4b0e.jpg) 7.1 IDEA建立工程 group:com.example artifact:bootiful dependencies:Reactive Web,Reactive MongoDB,Lombok,Actuator,Security 7.2 DATA DRIVE > Spring Data integrates seamlessly with SQL and NoSQL persistence stores. Spring Data supports reactive data access,too!

@Component class DataWriter implements ApplicationRunner { private final CustomerRepository customerRepository; DataWriter(CustomerRepository customerRepository) { this.customerRepository = customerRepository; } @Override public void run(ApplicationArguments args) throws Exception { Flux.just("Jack", "Rechal", "Richard", "Jobs") .flatMap(name -> customerRepository.save(new Customer(null, name))) .subscribe(System.out::println); } } interface CustomerRepository extends ReactiveMongoRepository<Customer, String> { } @Document @NoArgsConstructor @Data class Customer { private String id,name; public Customer(String id, String name) { this.id = id; this.name = name; } } 7.3 REST On the web,nobody knows you're a reactive microservice. @SpringBootApplication public class BootifulApplication { @Bean RouterFunction<ServerResponse> routes(CustomerRepository cr){ return RouterFunctions.route(GET("/customers"),serverRequest -> ok().body(cr.findAll(),Customer.class)); } public static void main(String[] args) { SpringApplication.run(BootifulApplication.class, args); } } 7.4 OBSERVABILITY How's your app's health?Who better to articulate that then the application itself? Spring Boot featurese strong opinions,loosely held. It's easy to change any of them with properties or pluggable implementations management.endpoint.health.show-details=always management.endpoints.web.exposure.exclude=* @Bean HealthIndicator healthIndicator(){ return () -> Health.status("I <3 Production").build(); } 訪問:curl http://localhost:8080/actuator/health | jq

7.5 SECURITY Effortlessly plugin authentication and authorization in a traditional or reactive application with Spring Security @Bean MapReactiveUserDetailsService users(){ return new MapReactiveUserDetailsService(User.withDefaultPasswordEncoder().username("user").password(" pw").roles("USER").build()); }

訪問:curl -vu user:pw http://localhost:8080/customers | jq

7.6 TO PRODUCTION Let's provision a MongoDB instance,configure our application's route and MongoDB binding,and then push our application to production with Cloud Foundry. 命令切換到bootiful根目錄下 cf services 定位到my-mongodb資料夾複製對應檔案，修改和觀察

Spring Boot基本操作

Spring Boot基本操作

spring boot資料庫操作彙總

SpringBoot 學習（一）---- SpringBoot 核心之 Spring Boot基本配置介紹

spring boot 基本筆記

spring boot 基本依賴引入

Spring-Boot--日誌操作配置檔案詳細情況

Spring-Boot--日誌操作【全域性異常捕獲訊息處理☞日誌控制檯輸出+日誌檔案記錄】

spring boot資料庫操作（以mysql為例）

使用P6Spy監控你的Spring boot資料庫操作

spring boot 下操作ES

spring boot 整合thyemleaf基本使用日期的操作（三）

spring boot 整合thyemleaf基本使用字串的操作（二）

Spring Boot的基本操作

Spring Boot(三)：AOP&日誌操作&異常處理

Spring Boot Starter 的基本封裝

Spring Boot 中配置定時任務，實現多線程操作

spring boot容器加載完後執行特定操作

Spring Boot實戰之數據庫操作

Spring Boot快速入門（五）：使用MyBatis（註解形式）進行數據庫操作

spring boot+tkmybatis(mapper)工具實現通用數據操作接口時遇到的問題

Spring Boot基本操作

相關推薦