1 Pom****文件
1.1 spring-boot-starter-parent
表示当前pom文件从spring-boot-starter-parent继承下来，在spring-boot-starter-parent中提供了很多默认配置，
可以简化我们的开发。<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.4.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent>
- Java版本和编码方式
<parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.4.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent>- 依赖管理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>
这样比如使用starter-web的时候就不需要指定版本号<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项目
这时候将依赖管理的问题放到dependencyManagement中。官网说明文档见：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
官网见：13.5 Starters
- 官方starter命名spring-boot-starter-*
- 自定义starter命名thirdpartyproject-spring-boot-starter
- spring-boot-web-starter查看其diagram，可以排除某个依赖
<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官网见：18. Using the @SpringBootApplication Annotation等同于@EnableAutoConfiguration，@ComponentScan和@Configuration2.2 SpringApplication.run官网见：23. SpringApplication3 配置文件3.1 初步感受server.port=90903.2 yml文件application.yml3.3 给属性注入值实体类Person和IDCardpublic 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注入写法
person:name: Jackage: 17birthday: 1997/06/01hobbies: [code，sing，share]idCard:id: 1number: 111
Person类增加注解@Component@ConfigurationProperties(prefix="person")
测试
@Autowiredprivate Person person;
如果Person类上报错，在Pom文件中加入如下依赖
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-configuration-processor</artifactId</dependency
4 处理动静态资源4.1 动态资源官网见：90.2 Reload Templates without Restarting the Containertemplatesresources目录下有一个templates文件夹，可以将动态资源放到其中引入thymeleaf
<!--thymeleaf的jar包-->
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency>templates下新建test.html文件<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";//想要动态的显示在网页当中model.addAttribute("str",str);//接下来的页面是能够动态显示传过来的数据return "test";}}4.2 静态资源static文件夹在resources目录下有一个static文件夹，可以将静态资源放到其中，浏览器可以直接访问。静态资源其他存放文件夹"classpath:/META-INF/resources/""classpath:/resources/""classpath:/static/""classpath:/public/"WebMvcAutoConfiguration源码分析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/" };`自定义静态资源文件夹观察@ConfigurationProperties(prefix = "spring.resources", ignoreUnknownFields = false)public class ResourceProperties {配置application.propertiesspring.resources.static-locations=classpath:/gupao/5 整合MyBatis5.1 需求通过Spring Boot Web项目api接口的方式，整合MyBatis实现crud的操作。5.2 创建Spring Boot Web项目重温一下web项目创建的过程。5.3 引入项目中需要的starter依赖<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 创建数据库表db_gupao_springboot--->t_user5.5 创建domain/User对象public class User {private int id;private String username;private String password;private String number;...}5.6 开发dao层@Repository@Mapperpublic interface UserMapper {User find(String username);List<User> list();int insert(User user);int delete(int id);int update(User user);}5.7 开发service层@Servicepublic class UserService {@Autowiredpublic 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 开发controller层@RestController@RequestMapping(value="/user",method = {RequestMethod.GET,RequestMethod.POST})public class UserController {@Autowiredprivate UserService userService;@RequestMapping("/listone")@ResponseBodypublic User listOne(String username){return userService.findByUsername(username);}@RequestMapping("/listall")@ResponseBodypublic List<User> listAll(){return userService.listUser();}@RequestMapping(value="/add",method= RequestMethod.POST)@ResponseBodypublic String add(User user){int result=userService.insertUser(user);if(result>=1) {return "添加成功";}else{return "添加失败";}}@RequestMapping(value="/update",method= RequestMethod.POST)@ResponseBodypublic String update(User user){int result=userService.updateUser(user);if(result>=1) {return "修改成功";}else{return "修改失败";}}@RequestMapping(value="/delete",method= RequestMethod.GET)@ResponseBodypublic String delete(int id){int result=userService.delete(id);if(result>=1) {return "删除成功";}else{return "删除失败";}}}5.9 resources目录下创建mapper文件夹---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文件配置#数据源spring:datasource:url: jdbc:mysql://127.0.0.1:3306/boot?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTCusername: rootpassword: 123456driver-class-name: com.mysql.cj.jdbc.Driver#mybatis托管mapper文件mybatis:mapper-locations: classpath:mapper/*.xml5.11 启动项目测试查询http://localhost:8888/user/listone?username=Jack全部查询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删除http://localhost:8888/user/delete?id=36 项目打包jar包mvn -Dmaven.test.skip -U clean installjava -jar xxx.jarwar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 minuteshttps://www.youtube.com/watch?v=lhkwLtDIMHI&feature=youtu.beBUILD ANYTHING WITH SPRING BOOTSpring Boot is the starting point for building all Spring-based applications. Spring Bootis designed to get you up and running as quickly as possible, with minimal upfrontconfiguration of Spring.7.1 IDEA创建工程group:com.exampleartifact:bootifuldependencies:Reactive Web,Reactive MongoDB,Lombok,Actuator,Security7.2 DATA DRIVE> Spring Data integrates seamlessly with SQL and NoSQL persistence stores. Spring Data supportsreactive data access,too!
@Componentclass DataWriter implements ApplicationRunner {private final CustomerRepository customerRepository;DataWriter(CustomerRepository customerRepository) {this.customerRepository = customerRepository;}@Overridepublic 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@Dataclass Customer {private String id,name;public Customer(String id, String name) {this.id = id;this.name = name;}}7.3 RESTOn the web,nobody knows you're a reactive microservice.@SpringBootApplicationpublic class BootifulApplication {@BeanRouterFunction<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 OBSERVABILITYHow'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 implementationsmanagement.endpoint.health.show-details=alwaysmanagement.endpoints.web.exposure.exclude=*@BeanHealthIndicator healthIndicator(){return () -> Health.status("I <3 Production").build();}访问:curl http://localhost:8080/actuator/health | jq
7.5 SECURITYEffortlessly plugin authentication and authorization in a traditional or reactive application with SpringSecurity@BeanMapReactiveUserDetailsService users(){return newMapReactiveUserDetailsService(User.withDefaultPasswordEncoder().username("user").password("pw").roles("USER").build());}
访问:curl -vu user:pw http://localhost:8080/customers | jq
7.6 TO PRODUCTIONLet's provision a MongoDB instance,configure our application's route and MongoDB binding,and thenpush our application to production with Cloud Foundry.命令切换到bootiful根目录下cf services定位到my-mongodb文件夹复制对应文件，修改和观察