SpringBoot 搭建项目 SpringCloud

Posted 2023-03-09 早起的年轻人

登录Spring Initializr生成Spring Boot项目模板，保存到本地。

地址：https://start.spring.io/

使用IDE导入生成的Maven项目,项目结构很简单:

1.pom.xml, Maven的配置文件。

application.yml 配置文件是空的。

<?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>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>3.0.4</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>club.bigleading</groupId>
	<artifactId>bigleading-admin</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>bigleading-admin</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>17</java.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<excludes>
						<exclude>
							<groupId>org.projectlombok</groupId>
							<artifactId>lombok</artifactId>
						</exclude>
					</excludes>
				</configuration>
			</plugin>
		</plugins>
	</build>

</project>

2 启动类 BigleadingAdminApplication

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class BigleadingAdminApplication 

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

3 打包运行

启动成功后 默认的端口是 8080

4 自定义启动端口

# Tomcat
server:
  tomcat:
    uri-encoding: UTF-8
    max-threads: 1000
    # 最小备用线程数，tomcat启动时的初始化的线程数，默认10。
    min-spare-threads: 30
  port: 8899
  context-path: /bigleadding-admin

• max-threads Tomcat tomcat 可创建的最大的线程数，每一个线程处理一个请求，超过这个请求数后，客户端请求只能排队，等有线程释放才能处理。最大工作线程数，默认200。（4核8g内存，线程数800，一般是核数*200。操作系统做线程之间的切换调度是有系统开销的，所以不是越多越好。）

4 添加测试 controller

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestController 
    @GetMapping(value="/hello")
    public Object hello() 
        return "Hello Kitty!";
    

然后在浏览器中访问（端口要对应起来）

http://localhost:8899/hello