springBoot打war包 并指定配置文件的两种方式

1： 使用pom文件配置
springBoot启动类要改动一下

package com.example.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 Demo1Application extends SpringBootServletInitializer{

	@Override
	protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
		return builder.sources(Demo1Application.class);
	}
	public static void main(String[] args) {
		SpringApplication.run(Demo1Application.class, args);
	}
}

改动pom文件

<groupId>com.example</groupId>
	<artifactId>demo-1</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>war</packaging> //记得是war

        <dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
			<scope>provided</scope>
		</dependency>  //自己添加tomcat依赖  记得provided

<build>
		<finalName>demo</finalName>//打成war包的名字
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-war-plugin</artifactId>
				<configuration>
					<packagingExcludes>
						WEB-INF/classes/user-application.properties //你要打成war包要排除的配置文件名
					</packagingExcludes>

				</configuration>
			</plugin>

打成war包后
打成的war包中不包含pom文件中排除在外的指定的配置文件
如果不指定的话，打成war包后包含所有配置文件

2：通过代码指定配置文件
首先还是修改一下启动类

package com.example.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 Demo1Application extends SpringBootServletInitializer{

	@Override
	protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
		return builder.sources(Demo1Application.class);
	}
	public static void main(String[] args) {
		SpringApplication.run(Demo1Application.class, args);
	}
}

在你的包下建一个类，那个包都行，只要启动是指定对路径即可（下面说），名字随意。代码如下

package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.env.EnvironmentPostProcessor;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.MutablePropertySources;
import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.support.PropertiesLoaderUtils;

import java.io.File;
import java.io.IOException;
import java.util.Properties;

public class aa implements EnvironmentPostProcessor{
//指定配置文件的路径
    private static final String LOCATION = "C:\\application.properties";

    @Override
    public void postProcessEnvironment(ConfigurableEnvironment configurableEnvironment, SpringApplication springApplication) {
        File file = new File(LOCATION);
//        File file = new File(System.getProperty("user.home"), LOCATION);
//        System.out.println("user.home" + System.getProperty("user.home"));
        if (file.exists()) {
            MutablePropertySources propertySources = configurableEnvironment.getPropertySources();
//            System.out.println("Loading local settings from " + file.getAbsolutePath());
            Properties properties = loadProperties(file);
//            System.out.println(properties.toString());
            propertySources.addFirst(new PropertiesPropertySource("Config", properties));
        }
    }

    private Properties loadProperties(File f) {
        FileSystemResource resource = new FileSystemResource(f);
        try {
            return PropertiesLoaderUtils.loadProperties(resource);
        }
        catch (IOException ex) {
            throw new IllegalStateException("Failed to load local settings from " + f.getAbsolutePath(), ex);
        }
    }
}
 

然后在resourse下建立一个META-INF文件夹，建立一个file，名字为spring.factories
内容是指定上一个class文件的路径

org.springframework.boot.env.EnvironmentPostProcessor=com.example.demo.aa

此时启动项目读取的是我C盘下的properties文件配置