11. 将博客部署到tomcat上

springboot项目既可以以jar运行，也可以做成war包放到服务器上，因为我的博客项目涉及到文件上传，所以按照jar的方式就不可行，需要部署到tomcat上，具体做法如下：
1. 修改pom.xml
1.1 将项目打包方式改为war：<packaging>war</packaging>
1.2 在spring-boot-starter-web的依赖中去除tomcat的包修改如下：

 <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>

pom.xml

1.3 添加对tomcat容器的依赖：

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

pom.xml

1.4 移除spring-boot-maven-plugin插件，并增加maven-war-plugin插件：

 <build>
     <plugins>
         <!-- <plugin>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-maven-plugin</artifactId>
         </plugin> -->
         <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-compiler-plugin</artifactId>
             <configuration>
                 <source>1.8</source>
                 <target>1.8</target>
             </configuration>
         </plugin>
         <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-war-plugin</artifactId>
             <configuration>
                 <warName>blog</warName>
                 <failOnMissingWebXml>false</failOnMissingWebXml>
             </configuration>
         </plugin>
     </plugins>
 </build>  

pom.xml

2. 修改App.java，使App继承自SpringBootServletInitializer，并重写SpringApplicationBuilder方法，代码如下：

 package com.lvniao.blog;

 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.builder.SpringApplicationBuilder;
 import org.springframework.boot.context.web.SpringBootServletInitializer;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.servlet.ModelAndView;

 @Controller
 @SpringBootApplication
 public class App extends SpringBootServletInitializer {
     @RequestMapping("/")
     public ModelAndView index(Model model) {
         model.addAttribute("hello", "Hello, World!");
         return new ModelAndView("redirect:/home/");
     }

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

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

App.java

通过以上步骤后就可以通过maven来打包发布了。