Springboot 打成war包

## 1. 前言
springboot 自带一个tomcat所以打出来的胖jar包直接执行即可
但胖jar包方式在用文件流读取静态配置文件时经常找不到文件
故打成war包以方便部署开发

## 2. 修改Pom文件的依赖
```
		<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.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
```

## 3.将打包方式声明为war
```
	
	<packaging>war</packaging>
```

## 4. 修改项目的Application文件
```
package com.xindeco.xdmail;

import java.util.TimeZone;
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
@MapperScan("com.xindeco.xdmail.mapper")
public class XdmailApplication extends SpringBootServletInitializer {

public static void main(String[] args) {
        // 如果是容器化部署，注意容器时间是否需要+8小时
        // TimeZone.setDefault(TimeZone.getTimeZone("Asia/Shanghai"));
        SpringApplication.run(XdmailApplication.class, args);
    }

@Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(XdmailApplication.class);
    }
}

```