用WAR的方式部署SpringBoot項目

  接SpringBoot 快速入門(Eclipse)java

步驟一:部署方式web

  Springboot 和 web 應用程序不同,其本質上是一個 Java 應用程序,那麼又如何部署呢?
  一般來講,Springboot 部署會採用兩種方式:所有打包成一個jar,或者打包成一個war。
  下面是war的方式。
spring

步驟二:可運行項目apache

   該項目是springboot入門的小demotomcat

步驟三:修改 Application類springboot

   application修改以下代碼websocket

   新加@ServletComponentScan註解,而且繼承SpringBootServletInitializer 。(規定這麼改)app

package cn.xdf.springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.boot.web.support.SpringBootServletInitializer;

@SpringBootApplication
@ServletComponentScan
public class Application extends SpringBootServletInitializer{
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(Application.class);
    }

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

}

步驟四:修改 pom.xml文件eclipse

  pom.xml修改成以下代碼,主要兩個改動
  新加打包成war的聲明: <packaging>war</packaging>
webapp

<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>cn.xdf</groupId>
  <artifactId>springbootTest</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>springboot </name>
  <description>springboot </description>
  <packaging>war</packaging>
  
     <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
    </parent>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
              <groupId>junit</groupId>
              <artifactId>junit</artifactId>
              <version>3.8.1</version>
              <scope>test</scope>
        </dependency>
    </dependencies>
 
    <properties>
        <java.version>1.8</java.version>
    </properties>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            
            <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                     <artifactId>maven-jar-plugin</artifactId>
             <version>2.5</version>
             </plugin>
        </plugins>

 

步驟五:建立war包

   在 E:\PROJECT3\springbootTest 目錄下,shift+右鍵,「在此處打開命令窗口」

   輸入命令: mvn clean package,生產war文件。(該命令表示 刪除target目錄及內容後從新打包)

   這樣就在 target 目錄下 生成了一個 springbootTest-0.0.1-SNAPSHOT.war 文件

步驟六:重命名war包 , 而後部署

  若是用 springboot-0.0.1-SNAPSHOT.war 這個文件名部署,那麼訪問的時候就要在路徑上加上springbootTest-0.0.1-SNAPSHOT。 因此把這個文件重命名爲 ROOT.war
  而後把它放進tomcat 的webapps目錄下。
  注:ROOT.war 並非指訪問的時候要使用 /ROOT/hello ,而是直接使用/hello 進行訪問,ROOT表示根路徑

 步驟七:啓動並測試

  運行tomcat下的 bin目錄裏的startup.bat(Windows下的tomcat), 而後就能夠啓動了. 啓動後訪問以下地址測試:

  http://127.0.0.1:8080/hello

  

注意點:tomcat啓動失敗

......
嚴重: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1095)
        at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1930)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoSuchMethodError: org.apache.tomcat.util.res.StringManager.getManager(Ljava/lang/Class;)Lorg/apache/tomcat/util/res/StringManager;
        at org.apache.tomcat.websocket.WsWebSocketContainer.<clinit>(WsWebSocketContainer.java:79)
        at org.apache.tomcat.websocket.server.WsSci.init(WsSci.java:131)
        at org.apache.tomcat.websocket.server.WsSci.onStartup(WsSci.java:47)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5506)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        ... 10 more

七月 24, 2018 3:00:16 下午 org.apache.catalina.startup.HostConfig deployWAR
嚴重: Error deploying web application archive D:\tomcat7-8080-eclipse\webapps\ROOT.war
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:905)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1095)
        at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1930)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

七月 24, 2018 3:00:16 下午 org.apache.catalina.startup.HostConfig deployWAR
信息: Deployment of web application archive D:\tomcat7-8080-eclipse\webapps\ROOT.war has finished in 2,494 ms
七月 24, 2018 3:00:16 下午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-bio-8080"]
七月 24, 2018 3:00:16 下午 org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["ajp-bio-8089"]
七月 24, 2018 3:00:16 下午 org.apache.catalina.startup.Catalina start
信息: Server startup in 2571 ms

  該錯是因爲application啓動類中嵌入的tomcat與部署war的tomcat衝突引發的,須要在pom.xml添加配置,來避免衝突!

  在pom.xml添加依賴:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
    <scope>provided</scope>
</dependency>

  而後,重複步驟4、5、六。

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