📅  最后修改于: 2020-11-11 05:30:59             🧑  作者: Mango
通过使用Spring Boot应用程序,我们可以创建一个war文件来部署到Web服务器中。在本章中,您将学习如何创建WAR文件以及如何在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类文件允许您使用Servlet容器在启动应用程序时对其进行配置。
下面给出了用于JAR文件部署的Spring Boot Application类文件的代码-
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);
}
}
我们需要扩展SpringBootServletInitializer类以支持WAR文件部署。 Spring Boot Application类文件的代码如下-
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;
@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,我们需要提及应在构建文件中启动的主类。为此,您可以使用以下代码-
对于Maven,在pom.xml属性中添加start类,如下所示-
com.tutorialspoint.demo.DemoApplication
对于Gradle,在build.gradle中添加主类名称,如下所示-
mainClassName="com.tutorialspoint.demo.DemoApplication"
我们必须使用以下代码将打包JAR打包为WAR:
对于Maven,将包装作为WAR添加到pom.xml中,如下所示-
war
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“ Hello World from Tomcat”。要编写一个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启动器依赖项-
org.springframework.boot
spring-boot-starter-web
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 Endpoint-
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";
}
}
现在,通过使用Maven和Gradle命令打包应用程序,创建一个WAR文件以部署到Tomcat服务器中,如下所示-
对于Maven,请使用命令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,如下面的屏幕快照所示-
对于Gradle,请使用gradle clean build命令打包应用程序。然后,将创建您的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更好地理解-
现在,运行Tomcat服务器,并将WAR文件部署在webapps目录下。观察此处显示的屏幕截图,以更好地理解-
成功部署后,在Web浏览器中单击URL http:// localhost:8080 / demo-0.0.1-SNAPSHOT /,然后观察到输出将如下面的屏幕快照所示-
下面给出了用于此目的的完整代码。
pom.xml
4.0.0
com.tutorialspoint
demo
0.0.1-SNAPSHOT
war
demo
Demo project for Spring Boot
org.springframework.boot
spring-boot-starter-parent
1.5.8.RELEASE
UTF-8
UTF-8
1.8
com.tutorialspoint.demo.DemoApplication
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-test
test
org.springframework.boot
spring-boot-maven-plugin
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')
}
下面给出了主要的Spring Boot应用程序类文件的代码-
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";
}
}