通过使用Spring Boot应用程序,我们可以创建一个war文件以部署到Web服务器中.在本章中,您将学习如何创建WAR文件并在Tomcat Web服务器中部署Spring Boot应用程序.
传统的部署方式是使Spring Boot Application @SpringBootApplication 类扩展 SpringBootServletInitializer 类. Spring Boot Servlet Initializer类文件允许您在使用Servlet Container启动时配置应用程序.
用于JAR文件部署的Spring Boot Application类文件的代码在下面给出 :
package com.it1352.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); } }
我们需要扩展类 SpringBootServletInitializer 以支持WAR文件部署. Spring Boot Application类文件的代码在下面给出 :
package com.it1352.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.boot.web.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); } }
在Spring Boot中,我们需要提一下应该在构建文件中启动的主类.为此,您可以使用以下代码和减号;
对于Maven,在 pom.xml 属性中添加启动类,如下所示 :
<start-class>com.it1352.demo.DemoApplication</start-class>
对于Gradle,在build.gradle中添加主类名,如下所示 :
mainClassName="com.IT屋.demo.DemoApplication"
我们必须使用以下代码和减号将包装JAR更新为WAR;
对于Maven,将包装作为WAR添加到 pom.xml 中如下所示 :
<packaging> war</packaging>
对于Gradle,在 build.gradle 中添加应用程序插件和war插件,如下所示 :
apply plugin:'war' apply plugin:'application'
现在,让我们编写一个简单的Rest Endpoint来返回字符串"Tomcat中的Hello World".要编写Rest Endpoint,我们需要将Spring Boot Web starter依赖项添加到我们的构建文件中.
对于Maven,使用如下所示的代码在pom.xml中添加Spring Boot启动程序依赖项低于 :
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency>
对于Gradle,使用如下所示的代码在 build.gradle 中添加Spring Boot启动器依赖项 :
dependencies { compile('org.springframework.boot:spring-boot-starter-web') }
现在,使用如下所示的代码在Spring Boot Application类文件中编写一个简单的Rest端点 :
package com.it1352.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.boot.web.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"; } }
现在,创建一个WAR文件进行部署通过使用Maven和Gradle命令将应用程序打包到Tomcat服务器中,如下所示 :
对于Maven,使用命令 mvn package 打包应用程序.然后,将创建WAR文件,您可以在目标目录中找到它,如下面给出的屏幕截图所示 :
对于Gradle,使用命令 gradle clean build 打包应用程序.然后,将创建WAR文件,您可以在 build/libs 目录下找到它.观察此处给出的屏幕截图,以便更好地理解 :
现在,运行Tomcat服务器,并在 webapps 目录下部署WAR文件.观察此处显示的屏幕截图,以便更好地理解 :
成功部署后,点击URL在您的网络浏览器中 http://localhost:8080/demo-0.0.1-SNAPSHOT/并观察输出将如下面给出的屏幕截图所示 : 去;
下面给出了完整的代码.
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.it1352</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.it1352.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.it1352' version = '0.0.1-SNAPSHOT' sourceCompatibility = 1.8 mainClassName = "com.it1352.demo.DemoApplication" repositories { mavenCentral() } dependencies { compile('org.springframework.boot:spring-boot-starter-web') testCompile('org.springframework.boot:spring-boot-starter-test') }
主Spring Boot ap的代码plication类文件在下面给出 :
package com.it1352.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.builder.SpringApplicationBuilder; import org.springframework.boot.web.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"; } }