搭建SpringToolSuit4开发环境

SpringToolSuit4包含了eclipse和spring，这样就不用单独下载eclipse和spring避免安装过程中的各种版本问题。

1. 下载SpringToolSuit4

https://spring.io/tools

选择平台，下来安装即可：

Screen Shot 2020-08-29 at 11.54.44.png

2. 创建第一个工程

安装完之后打开，SpringToolSuit4，在左边窗口选择：Create new Spring Starter Project：

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下一步，这里注意选择正确的java版本：

Screen Shot 2020-08-29 at 12.15.49.png

再下一步，选择Spring Web

Screen Shot 2020-08-29 at 12.17.55.png

下一步，直到完成

3. 添加功能代码

定义个controller：
添加一个新的package：com.example.demo.controller，新controller的类名为DemoController：

Screen Shot 2020-08-29 at 12.22.21.png

修改主类的SpringBootApplication属性：
从：@SpringBootApplication
到：@SpringBootApplication(scanBasePackages = "com.example.demo.controller")

Screen Shot 2020-08-29 at 12.23.40.png

运行：

run.png

打开浏览器访问：http://localhost:8080/test

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添加静态页面 src/main/resources/static：
添加文件index.html

Screen Shot 2020-08-29 at 12.29.49.png

访问：http://localhost:8080/index.html，就能看到添加的静态页面内容。

修改服务配置

Screen Shot 2020-08-29 at 12.32.24.png

这是两个例子：

1. 把监听端口改为其他值，8080是默认值。
2. 然后还可以修改项目的context path，例如图示例子，那么重启server之后前面的访问地址就要变成：
   http://localhost:8080/demo/test 和 http://localhost:8080/demo/index.html

4. jar包发布

使用SpringToolSuit4开发的另一个好处是tomcat也不需要了，直接二进制jar包发布运行。

Screen Shot 2020-08-29 at 12.37.36.png

生成jar包target/demo-0.0.1-SNAPSHOT.jar，然后可以直接运行：

$ java -jar target/demo-0.0.1-SNAPSHOT.jar

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.3.3.RELEASE)

2020-08-29 12:40:11.032  INFO 314 --- [           main] com.example.demo.DemoApplication         : Starting DemoApplication v0.0.1-SNAPSHOT on <user>-mac with PID 314 (/Users/<user>/Documents/workspace-spring-tool-suite-4-4.7.1.RELEASE/demo/target/demo-0.0.1-SNAPSHOT.jar started by <user> in /Users/<user>/Documents/workspace-spring-tool-suite-4-4.7.1.RELEASE/demo)
2020-08-29 12:40:11.040  INFO 314 --- [           main] com.example.demo.DemoApplication         : No active profile set, falling back to default profiles: default
2020-08-29 12:40:12.417  INFO 314 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2020-08-29 12:40:12.435  INFO 314 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-08-29 12:40:12.435  INFO 314 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.37]
2020-08-29 12:40:12.574  INFO 314 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/demo]   : Initializing Spring embedded WebApplicationContext
2020-08-29 12:40:12.575  INFO 314 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1435 ms
2020-08-29 12:40:12.936  INFO 314 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2020-08-29 12:40:13.066  INFO 314 --- [           main] o.s.b.a.w.s.WelcomePageHandlerMapping    : Adding welcome page: class path resource [static/index.html]
2020-08-29 12:40:13.225  INFO 314 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path '/demo'
2020-08-29 12:40:13.240  INFO 314 --- [           main] com.example.demo.DemoApplication         : Started DemoApplication in 2.796 seconds (JVM running for 3.39)

一样访问http://localhost:8080/demo/test和http://localhost:8080/demo/index.html。