Springboot系列之—war包部署&配置文件分离

[johnnian]

场景

公司给客户定制的项目，需求是：

• web包需要在tomcat容器下运行：我们的项目是基于Springboot架构，之前都是使用jar包直接运行；
• application.properties 需要做到方便配置：war包启动的时候，需要读取系统某个路径下的指定配置文件

解决步骤

1、pom文件修改

<?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>

	...
	<packaging>war</packaging>
	...
	
	<dependencies>
		...
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
		</dependency>
		...
	</dependencies>
	<build>
		<resources>
			<resource>
				<directory>src/main/resources</directory>
				<filtering>true</filtering>
				<excludes>
					<exclude>application.properties</exclude>
				</excludes>
			</resource>
		</resources>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<mainClass>com.Application</mainClass>
				</configuration>
				<executions>
					<execution>
						<goals>
							<goal>repackage</goal>
						</goals>
					</execution>
				</executions>
			</plugin>

			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
					<showWarnings>true</showWarnings>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-surefire-plugin</artifactId>
				<configuration>
					<skipTests>true</skipTests>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>

2、 修改主启动类的配置方法：

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer;
import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.boot.web.support.SpringBootServletInitializer;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.ComponentScan;
import java.util.Properties;

@SpringBootApplication
@ComponentScan // 开启通用注解扫描
@ServletComponentScan // 扫描使用注解方式的servlet
public class Application  extends SpringBootServletInitializer implements EmbeddedServletContainerCustomizer {

	private static Logger logger = LoggerFactory.getLogger(Application.class);
	

	@Override
	protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
		return application.sources(Application.class)
				.properties(getProperties());
	}


	public static void main(String[] args) {
		ConfigurableApplicationContext applicationContext = new SpringApplicationBuilder(Application.class)
				.properties(getProperties())
				.build().run(args);
	}

	/**
	 * 设置配置文件
	 * @return
	 */
	private static Properties getProperties() {
		Properties props = new Properties();
		props.put("spring.config.location", "/path/to/application.properties");
		return props;
	}
    

3、启动项目

直接maven编译项目，放入tomcat的webapps目录下即可