关于springboot:Spring-Boot快速入门之四Tomcat-部署

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【注】本文译自:https://www.tutorialspoint.com/spring_boot/spring_boot_tomcat_deployment.htm

应用 Spring Boot 利用,咱们能够创立一个 war 文件部署到 web 服务器中。本文解说如何创立 war 文件并将 Spring Boot 利用部署到 Tomcat web 服务器中。

Spring Boot Servlet 初始化器

传统的部署形式是将 Spring Boot 利用中 @SpringBootApplication 注解的类扩大自 SpringBootServletInitializer 类。Spring Boot Servlet Initializer 类文件容许你在应用 Servlet 窗口启动时配置利用。

用于 JAR 文件部署的 Spring Boot 利用类文件示例如下:

package com.tutorialspoint.demo;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class DemoApplication {

public static void main(String[] args) {

SpringApplication.run(DemoApplication.class, args);

}

}

咱们须要扩大类 SpringBootServletInitializer 以反对 WAR 文件部署。对应的 Spring Boot 利用类文件如下:

package com.tutorialspoint.demo;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.builder.SpringApplicationBuilder;

import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

@SpringBootApplication

public class DemoApplication  extends SpringBootServletInitializer {

@Override

protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {

return application.sources(DemoApplication.class);

}

public static void main(String[] args) {

SpringApplication.run(DemoApplication.class, args);

}

}

设置主类

在 Spring Boot 中,咱们须要在构件文件中指定主类。可应用上面的代码片段:

对于 Maven,在 pom.xml 中减少启动类属性,如下所示:

<start-class>com.tutorialspoint.demo.DemoApplication</start-class>

对于 Gradle,在 build.gradle 中退出主类名,如下所示:

mainClassName=”com.tutorialspoint.demo.DemoApplication”

更新 JAR 包到 WAR 中

咱们还要用上面的代码片段更新 JAR 包到 WAR 中:

对于 Maven,pom.xml 中打包 WAR 的插件如下:

<packaging>war</packaging>

对于 Gradle,在 build.gradle 中加上 利用和 war 插件,如下所示:

apply plugin:‘war’

apply plugin:‘application’

当初,让咱们编写一个简略的 Rest 端点,返回“Hello World from Tomcat”字符串。要编写 Rest Endpoint,咱们要在构建文件中加上 Spring Boot web starter 依赖。

对于 Maven,在 pom.xml 中加上 Spring Boot starter 依赖,如下所示:

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-web</artifactId></dependency>

对于 Gradle,在 build.gradle 中加上 Spring Boot starter 依赖,如下所示:

dependencies {

compile(‘org.springframework.boot:spring-boot-starter-web’)

}

当初,在 Spring Boot 利用类文件中编写 Rest 端点,示例代码如下:

package com.tutorialspoint.demo;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.builder.SpringApplicationBuilder;

import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

import org.springframework.web.bind.annotation.RequestMapping;

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

@SpringBootApplication

@RestController

public class DemoApplication extends SpringBootServletInitializer {

@Override

protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {

return application.sources(DemoApplication.class);

}

public static void main(String[] args) {

SpringApplication.run(DemoApplication.class, args);

}

@RequestMapping(value = “/”)

public String hello() {

return “Hello World from Tomcat”;

}

}

打包利用

如下所示,应用 Maven 或 Gradle 命令将利用打包成 WAR 文件以部署到 Tomcat 服务器:

对于 Maven,用 mvn package 来打包利用。之后,会创立一个 WAR 文件,能够在 target 目录下找到它,如下图:


对于 Gradle,用 gradle clean build 来打包利用。之后,会创立一个 WAR 文件,能够在 build/libs 目录下找到它,如下图:

部署到 Tomcat

当初,运行 Tomcat 服务器,在 webapps 目录下部署 WAR 文件,如下图所示:


部署胜利之后,在 web 浏览器中敲入 http://localhost:8080/demo-0.0.1-SNAPSHOT/,屏幕截图如下:

全副代码如下:

pom.xml

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd”>

<modelVersion>4.0.0</modelVersion>

<groupId>com.tutorialspoint</groupId>

<artifactId>demo</artifactId>

<version>0.0.1-SNAPSHOT</version>

<packaging>war</packaging>

<name>demo</name>

<description>Demo project for Spring Boot</description>

<parent>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-parent</artifactId>

<version>1.5.8.RELEASE</version>

<relativePath/> <!– lookup parent from repository –>

</parent>

<properties>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

<java.version>1.8</java.version>

<start-class>com.tutorialspoint.demo.DemoApplication</start-class>

</properties>

<dependencies>

<dependency>

<groupId>org.springframework.boot</groupId>

<artifactId>spring-boot-starter-web</artifactId>

</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>

</plugin>

</plugins>

</build>

</project>

build.gradle

buildscript {

ext {

springBootVersion = ‘1.5.8.RELEASE’

}

repositories {

mavenCentral()

}

dependencies {

classpath(“org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}”)

}

}

apply plugin: ‘java’

apply plugin: ‘eclipse’

apply plugin: ‘org.springframework.boot’

apply plugin: ‘war’

apply plugin: ‘application’

group = ‘com.tutorialspoint’

version = ‘0.0.1-SNAPSHOT’

sourceCompatibility = 1.8

mainClassName = “com.tutorialspoint.demo.DemoApplication”

repositories {

mavenCentral()

}

dependencies {

compile(‘org.springframework.boot:spring-boot-starter-web’)

testCompile(‘org.springframework.boot:spring-boot-starter-test’)

}

主 Spring Boot 利用类文件如下:

package com.tutorialspoint.demo;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.builder.SpringApplicationBuilder;

import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

import org.springframework.web.bind.annotation.RequestMapping;

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

@SpringBootApplication

@RestController

public class DemoApplication  extends SpringBootServletInitializer {

@Override

protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {

return application.sources(DemoApplication.class);

}

public static void main(String[] args) {

SpringApplication.run(DemoApplication.class, args);

}

@RequestMapping(value = “/”)

public String hello() {

return “Hello World from Tomcat”;

}

}

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