把spring-boot項目按照平常的web項目一樣發布到tomcat容器下
@Author Jacky Wang , 轉載請注明出處 http://www.lxweimin.com/p/f6b8b0ad1fc6

一、修改打包形式

在pom.xml里設置 <packaging>war</packaging>

二、移除嵌入式tomcat插件

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <!-- 移除嵌入式tomcat插件 -->
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </exclusion>
    </exclusions>
</dependency>

三、添加servlet-api或者tomcat的依賴

下面兩種方式都可以，任選其一
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>


<dependency>
    <groupId>org.apache.tomcat</groupId>
    <artifactId>tomcat-servlet-api</artifactId>
    <version>8.0.36</version>
    <scope>provided</scope>
</dependency>

四、修改啟動類，并重寫初始化方法

我們平常用main方法啟動的方式，都有一個App的啟動類，代碼如下：
@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}


我們需要類似于web.xml的配置方式來啟動spring上下文，可以將啟動類繼承SpringBootServletInitializer類,并重寫configure方法。
這里例子另寫了一個類繼承，都是可以的。

/**
 * 修改啟動類，繼承 SpringBootServletInitializer 并重寫 configure 方法
 */
public class SpringBootStartApplication extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        // 注意這里要指向原先用main方法執行的Application啟動類
        return builder.sources(Application.class);
    }
}


到這里就已經完成了,使用Maven的打包命令mvn clean package -Dmaven.test.skip=true打包即可。

五、我的代碼示例

pom.xml:

<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.dream</groupId>
    <artifactId>jenkins-test</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>

    <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>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-web -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-servlet-api</artifactId>
            <version>8.0.36</version>
            <scope>provided</scope>
        </dependency>
        
        <!-- 熱部署插件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <build>
        <finalName>jenkins-test</finalName>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Application啟動類：(這里我直接使用啟動類繼承了SpringBootServletInitializer)

@SpringBootApplication
public class Application extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        // 注意這里要指向原先用main方法執行的Application啟動類
        return builder.sources(Application.class);
    }
    
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

1.png