Spring快速使用及配置

参考文档 Spring Boot Reference Guide

添加pom依赖

 

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>myproject</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <!-- Inherit defaults from Spring Boot -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
    </parent>

    <!-- Add typical dependencies for a web application -->
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

    <!-- Package as an executable jar -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

编写代码

要完成我们的应用程序，我们需要创建一个Java文件。默认情况下，Maven 从 编译源，因此您需要创建该文件夹结构，然后添加一个名为包含以下代码的文件：src/main/javasrc/main/java/Example.java

import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.web.bind.annotation.*;

@RestController
@EnableAutoConfiguration
public class Example {

    @RequestMapping("/")
    String home() {
        return "Hello World!";
    }

    public static void main(String[] args) {
        SpringApplication.run(Example.class, args);
    }
 }

运行示例

此时，您的应用程序应该可以正常工作。由于您使用了 POM，因此您有一个有用的目标，可用于启动应用程序。从根项目目录中键入以启动应用程序。您应看到类似于以下内容的输出：spring-boot-starter-parentrunmvn spring-boot:run

$ mvn spring-boot:run

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::  (v2.1.6.RELEASE)
....... . . .
....... . . . (log output here)
....... . . .
........ Started Example in 2.222 seconds (JVM running for 6.514)

如果将 Web 浏览器打开 为，则应看到以下输出：localhost:8080

Hello World!

Table 13.1. Spring Boot application starters启动类

Name	Description	Pom
spring-boot-starter	Core starter, including auto-configuration support, logging and YAML	Pom
spring-boot-starter-activemq	Starter for JMS messaging using Apache ActiveMQ	Pom
spring-boot-starter-amqp	Starter for using Spring AMQP and Rabbit MQ	Pom
spring-boot-starter-aop	Starter for aspect-oriented programming with Spring AOP and AspectJ	Pom
spring-boot-starter-artemis	Starter for JMS messaging using Apache Artemis	Pom
spring-boot-starter-batch	Starter for using Spring Batch	Pom
spring-boot-starter-cache	Starter for using Spring Framework’s caching support	Pom
spring-boot-starter-cloud-connectors	Starter for using Spring Cloud Connectors which simplifies connecting to services in cloud platforms like Cloud Foundry and Heroku	Pom
spring-boot-starter-data-cassandra	Starter for using Cassandra distributed database and Spring Data Cassandra	Pom
spring-boot-starter-data-cassandra-reactive	Starter for using Cassandra distributed database and Spring Data Cassandra Reactive	Pom
spring-boot-starter-data-couchbase	Starter for using Couchbase document-oriented database and Spring Data Couchbase	Pom
spring-boot-starter-data-couchbase-reactive	Starter for using Couchbase document-oriented database and Spring Data Couchbase Reactive	Pom
spring-boot-starter-data-elasticsearch	Starter for using Elasticsearch search and analytics engine and Spring Data Elasticsearch	Pom
spring-boot-starter-data-jdbc	Starter for using Spring Data JDBC	Pom
spring-boot-starter-data-jpa	Starter for using Spring Data JPA with Hibernate	Pom
spring-boot-starter-data-ldap	Starter for using Spring Data LDAP	Pom
spring-boot-starter-data-mongodb	Starter for using MongoDB document-oriented database and Spring Data MongoDB	Pom
spring-boot-starter-data-mongodb-reactive	Starter for using MongoDB document-oriented database and Spring Data MongoDB Reactive	Pom
spring-boot-starter-data-neo4j	Starter for using Neo4j graph database and Spring Data Neo4j	Pom
spring-boot-starter-data-redis	Starter for using Redis key-value data store with Spring Data Redis and the Lettuce client	Pom
spring-boot-starter-data-redis-reactive	Starter for using Redis key-value data store with Spring Data Redis reactive and the Lettuce client	Pom
spring-boot-starter-data-rest	Starter for exposing Spring Data repositories over REST using Spring Data REST	Pom
spring-boot-starter-data-solr	Starter for using the Apache Solr search platform with Spring Data Solr	Pom
spring-boot-starter-freemarker	Starter for building MVC web applications using FreeMarker views	Pom
spring-boot-starter-groovy-templates	Starter for building MVC web applications using Groovy Templates views	Pom
spring-boot-starter-hateoas	Starter for building hypermedia-based RESTful web application with Spring MVC and Spring HATEOAS	Pom
spring-boot-starter-integration	Starter for using Spring Integration	Pom
spring-boot-starter-jdbc	Starter for using JDBC with the HikariCP connection pool	Pom
spring-boot-starter-jersey	Starter for building RESTful web applications using JAX-RS and Jersey. An alternative to spring-boot-starter-web	Pom
spring-boot-starter-jooq	Starter for using jOOQ to access SQL databases. An alternative to spring-boot-starter-data-jpa or spring-boot-starter-jdbc	Pom
spring-boot-starter-json	Starter for reading and writing json	Pom
spring-boot-starter-jta-atomikos	Starter for JTA transactions using Atomikos	Pom
spring-boot-starter-jta-bitronix	Starter for JTA transactions using Bitronix	Pom
spring-boot-starter-mail	Starter for using Java Mail and Spring Framework’s email sending support	Pom
spring-boot-starter-mustache	Starter for building web applications using Mustache views	Pom
spring-boot-starter-oauth2-client	Starter for using Spring Security’s OAuth2/OpenID Connect client features	Pom
spring-boot-starter-oauth2-resource-server	Starter for using Spring Security’s OAuth2 resource server features	Pom
spring-boot-starter-quartz	Starter for using the Quartz scheduler	Pom
spring-boot-starter-security	Starter for using Spring Security	Pom
spring-boot-starter-test	Starter for testing Spring Boot applications with libraries including JUnit, Hamcrest and Mockito	Pom
spring-boot-starter-thymeleaf	Starter for building MVC web applications using Thymeleaf views	Pom
spring-boot-starter-validation	Starter for using Java Bean Validation with Hibernate Validator	Pom
spring-boot-starter-web	Starter for building web, including RESTful, applications using Spring MVC. Uses Tomcat as the default embedded container	Pom
spring-boot-starter-web-services	Starter for using Spring Web Services	Pom
spring-boot-starter-webflux	Starter for building WebFlux applications using Spring Framework’s Reactive Web support	Pom
spring-boot-starter-websocket	Starter for building WebSocket applications using Spring Framework’s WebSocket support	Pom