一、如何快速搭建你的第一个SpringBoot项目应用

<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>
  
  <!-- 必须集成，里面有很多的配置，简化我们的开发 -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.2.RELEASE</version>
  </parent>
  
  <groupId>com.spring</groupId>
  <artifactId>spring_demo01</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

  
  <dependencies>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
    </dependency>
    <!-- 连接池 -->
    <dependency>
      <groupId>com.jolbox</groupId>
      <artifactId>bonecp-spring</artifactId>
      <version>0.8.0.RELEASE</version>
    </dependency>
    
    <!-- 添加springboot的web支持 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
  </dependencies>
  <build>
    <finalName>${project.artifactId}</finalName>
    <plugins>
      <!-- 资源文件拷贝插件 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-resources-plugin</artifactId>
        <configuration>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
      <!-- java编译插件 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.7</source>
          <target>1.7</target>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
      
      <!-- 添加springboot的插件 -->
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
    <pluginManagement>
      <plugins>
        <!-- 配置Tomcat插件 -->
        <plugin>
          <groupId>org.apache.tomcat.maven</groupId>
          <artifactId>tomcat7-maven-plugin</artifactId>
          <version>2.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>

</project>

package com.lbt.springboot.demo;

import org.springframework.boot.Banner.Mode;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * @Descriptions:SpringBoot项目入口
 * @date : 2018年5月10日 下午2:42:17
 */

@Controller  // 标明这是一个SpringMVC的Controller控制器
@SpringBootApplication  // Springboot应用,核心注解，主要目的是开启自动配置
@Configuration  // 声明这是一个配置类
// @SpringBootConfiguration
public class ApplicationDemo {

  @RequestMapping("hello")
  @ResponseBody
  public String hello() {
    return "hello SpringBoot";
  }
  
  public static void main(String[] args) {
    
    // SpringApplication.run(ApplicationDemo.class, args);
    
    SpringApplication app = new SpringApplication(ApplicationDemo.class);
    app.setBannerMode(Mode.OFF);
    app.run(args);
  }
}