自从Spring boot出来后，他的嵌入式Tomcat，Jetty容器，无需部署WAR包的方式，也是受很开发运维人员的喜爱，但是碰到旧的web项目进行部署，习惯了spring boot启动方式，还是感 觉到有点狗血的，所以如何将web工程改成java -jar xx.jar 方式启动，可以使用Embeded-Tomcat,内嵌入Tomcat来达到我们的目的， 下面就分享一下内嵌tomcat的方式。
---
## 1.加入内嵌Tomcat依赖
```
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<version>8.5.5</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-el</artifactId>
<version>8.5.5</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-jasper</artifactId>
<version>8.5.5</version>
</dependency>
```
## 2.配置文件
application-local.properties
```
# Tomcat settings
tomcat.port=28080
tomcat.basedir=E:/fhcb10/news-web/tomcat/basedir
```
application-rc.properties
```
#Tomcat settings
tomcat.port=28080
tomcat.basedir=/data/fhcb10/news-web/tomcat/
```
## 3.添加加载配置的类
```
import org.apache.commons.configuration.Configuration;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
*
* 环境配置加载类
* @author huangyan
* @date 2018/6/5 11:38
*/
public class EnvConfig {
private final static Logger log = LoggerFactory.getLogger(EnvConfig.class);
public static String port = null;
public static String basedir = null;public static String filepath = null;
/**
*
* 初始化加载配置
* @author
* @date 2018/6/5 11:25
* @param []
* @return boolean
*/
public static boolean init() {
Configuration config;
try {
String env = System.getProperty("env");
if (env == null) {
log.info("没有配置环境，使用本地配置local");
env = "local";
}
log.info("当前的环境是: " + env);
String fileName = "application" + "-" + env + ".properties";
config = new PropertiesConfiguration(fileName);
port = config.getString("tomcat.port");
if(port == null || port.isEmpty()) {
port = "8080";
}
basedir = config.getString("tomcat.basedir");
filepath = config.getString("filepath");
log.info("==========================================");
log.info(" CONFIG ");
log.info("==========================================");
log.info("port: " + port);
log.info("docbase : " + basedir);
log.info("filepath : " + filepath);
return true;
} catch (Exception e) {
log.error(e.getMessage(), e);
return false;
}
}
}
```
# 4.内嵌Tomcat启动类
```
package com.twsm.embededtomcat;
import com.twsm.embededtomcat.config.EnvConfig;
import org.apache.catalina.core.StandardContext;
import org.apache.catalina.startup.Tomcat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
/**
*
* 内嵌Tomcat配置启动主类
* @author huangyan
* @date 2018/6/5 11:38
*/
public class NewsWebMain {
private static Logger log = LoggerFactory.getLogger(NewsWebMain.class);
/**
*
* Tomcat 启动主类方法
* @author huangyan
* @date 2018/6/5 11:39
* @param [args]
* @return void
*/
public static void main(String[] args) throws Exception {
try {
if (!EnvConfig.init()) {
log.info("加載配置文件失敗。");
System.exit(0);
}
// 1.创建一个内嵌的Tomcat
Tomcat tomcat = new Tomcat();
// 2.设置Tomcat端口默认为8080
final Integer webPort = Integer.parseInt(EnvConfig.port);
tomcat.setPort(Integer.valueOf(webPort));
// 3.设置工作目录,tomcat需要使用这个目录进行写一些东西
final String baseDir = EnvConfig.basedir;
tomcat.setBaseDir(baseDir);
tomcat.getHost().setAutoDeploy(false);
// 4. 设置webapp资源路径
String webappDirLocation = "webapp/";
StandardContext ctx = (StandardContext) tomcat.addWebapp("/", new File(webappDirLocation).getAbsolutePath());
log.info("configuring app with basedir: " + new File("" + webappDirLocation).getAbsolutePath());
log.info("project dir:"+new File("").getAbsolutePath());
// 5. 设置上下文路每径
String contextPath = "";
ctx.setPath(contextPath);
ctx.addLifecycleListener(new Tomcat.FixContextListener());
ctx.setName("news-web");
System.out.println("child Name:" + ctx.getName());
tomcat.getHost().addChild(ctx);
/* File additionWebInfClasses = new File("");
WebResourceRoot resources = new StandardRoot(ctx);
resources.addPreResources(new DirResourceSet(resources, "/WEB-INF/classes",
additionWebInfClasses.getAbsolutePath() + "/classes", "/"));
ctx.setResources(resources);
*/
log.info("服务器加载完配置，正在启动中……");
tomcat.start();
log.info("服务器启动成功");
tomcat.getServer().await();
} catch (Exception exception) {
log.error("服务器启动失敗", exception);
}
}
}
```
5.Maven打包插件配置和资源配置
```
<build>
<finalName>${artifactId}</finalName>
<plugins>
<!-- 配置启动类 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix> <mainClass>com.twsm.embededtomcat.NewsWebMain</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<!-- 打包加入依赖的包 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.10</version>
<executions>
<execution>
<id>copy-dependencies</id>
<phase>package</phase>
<goals>
<goal>copy-dependencies</goal>
</goals>
<configuration>
<outputDirectory>${project.build.directory}/lib</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<!-- 资源输出路径配置 -->
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
</includes>
<!-- 是否替换资源中的属性 -->
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.*</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/webapp</directory>
<targetPath>${basedir}/target/webapp</targetPath>
<includes>
<include>**/*.*</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
```
## 5.修改pom文件中的打包类型
```
<packaging>jar</packaging>
```
## 6.在父工程目录编译打包
```
mvn clean package -Dmaven.test.skip=true
```
打包完后的target目录结构如下：
将target目录下的，lib,webapp,news-web.jar和classes下的所有配置文件拷贝到任一目录下，如下图：
## 7.启动运行应用
```
java -jar Denv=rc news-web.jar
```
执行以上命令就可以看到启动的日志和启动成功，如下图：
## 8.在linux的启动脚本
```
nohup java -Xmx500m -Xss64m -jar -Denv=rc news-web.jar > log.txt &
tail -f log.txt
```