前言

Spring Boot 是由 Pivotal 团队提供的全新框架，其设计目的是用来简化新 Spring 应用的初始搭建以及开发过程。该框架使用了特定的方式来进行配置，从而使开发人员不再需要定义样板化的配置。

 

1.创建maven项目 修改pom文件如下

<?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><groupId>com.xue</groupId><artifactId>demo</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>demo</name><description>Demo project for Spring Boot</description><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.9.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.7</java.version></properties><dependencies><!-- 核心模块，包括自动配置支持、日志和YAML --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter</artifactId></dependency><!-- 测试模块，包括JUnit、Hamcrest、Mockito。 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!-- web --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- CXF webservice --><dependency><groupId>org.apache.cxf</groupId><artifactId>cxf-spring-boot-starter-jaxws</artifactId><version>3.1.11</version></dependency><!-- CXF webservice --><!-- mysql start --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency><!-- mysql end --><!-- httpclient start --><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpcore</artifactId><version>4.4.1</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>fluent-hc</artifactId><version>4.3.1</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpmime</artifactId><version>4.3.1</version><exclusions><exclusion><groupId>commons-logging</groupId><artifactId>commons-logging</artifactId></exclusion></exclusions></dependency><!-- httpclient end --><dependency><groupId>commons-lang</groupId><artifactId>commons-lang</artifactId><version>2.0</version></dependency></dependencies><build><finalName>${project.artifactId}</finalName><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><executable>true</executable></configuration></plugin></plugins></build></project>

2.项目配置文件

application.properties是主配置文件项目启动时会加载该文件，主要是放公共配置

dev是本地配置，prod是生产环境配置，test是测试环境配置

这样配置的好处是启动时可以默认加载某个配置文件，启动命令如下

java -jar project-name.jar --spring.config.location=/project-name/config/application.properties --spring.profiles.active=dev

application.properties配置如下 

#激活哪一个环境的配置文件
spring.profiles.active=dev
#公共配置
spring.jackson.date-format=yyyy-MM-dd HH:mm:ss:

application-dev.properties配置如下

#端口号
server.port=8080#数据库连接
spring.jpa.show-sql = true
spring.jpa.hibernate.ddl-auto= updatespring.datasource.url=jdbc:mysql://127.0.0.1:3306/shop?useUnicode=true&autoReconnect=true&failOverReadOnly=false&characterEncoding=UTF-8 
spring.datasource.username=root
spring.datasource.password=admin
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.initialSize=10
spring.datasource.minIdle=10
spring.datasource.maxActive=30
spring.datasource.maxWait=60000
spring.datasource.timeBetweenEvictionRunsMillis=60000
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false

application-test.properties配置和application-prod.properties配置如上

3.项目目录结构 如下图

4. 日志配置

    

<?xml version="1.0" encoding="UTF-8"?>
<configuration><!-- <include resource="org/springframework/boot/logging/logback/base.xml" /> --><!--生产环境  --><springProfile name="prod"><!-- 将日志记录到文件中 --><appender name="LOG" class="ch.qos.logback.core.rolling.RollingFileAppender"><File>back.log</File><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><!--日志文件输出的文件名--><FileNamePattern>back.%d{yyyy-MM-dd}.log</FileNamePattern><!--日志文件保留天数--><maxHistory>30</maxHistory></rollingPolicy><encoder><Pattern>%-20(%d{yyyy-MM-dd HH:mm:ss.SSS}) [%thread] %-5level %logger{80}.%method - %msg%nn</Pattern></encoder></appender><root level="WARN"><appender-ref ref="LOG"/></root>
</springProfile><!--测试环境  --> <springProfile name="test"><!-- 将日志打印到控制台 --><appender name="LOG" class="ch.qos.logback.core.rolling.RollingFileAppender"><File>back.log</File><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><FileNamePattern>back.%d{yyyy-MM-dd}.log</FileNamePattern><maxHistory>30</maxHistory></rollingPolicy><encoder><Pattern>%-20(%d{yyyy-MM-dd HH:mm:ss.SSS}) [%thread] %-5level %logger{80}.%method - %msg%n</Pattern></encoder></appender><root level="info"><appender-ref ref="LOG"/></root></springProfile><!--开发环境  --><springProfile name="dev"><!-- 将日志打印到控制台 --><appender name="LOG" class="ch.qos.logback.core.ConsoleAppender"><encoder><Pattern>%-20(%d{yyyy-MM-dd HH:mm:ss.SSS}) [%thread] %-5level %logger{80}.%method - %msg%n</Pattern></encoder></appender><root level="info"><appender-ref ref="LOG"/></root></springProfile><!-- 下面配置一些第三方包的日志过滤级别，用于避免刷屏 -->  <logger name="org.hibernate" level="WARN" />  <logger name="org.springframework" level="WARN" />  <logger name="org.thymeleaf" level="WARN" />  <logger name="org.apache" level="WARN" />  <!-- show parameters for hibernate sql 专为 Hibernate 定制 -->  <logger name="org.hibernate.type.descriptor.sql.BasicBinder"  level="TRACE" />  <logger name="org.hibernate.type.descriptor.sql.BasicExtractor"  level="DEBUG" />  <logger name="org.hibernate.SQL" level="DEBUG" />  <logger name="org.hibernate.engine.QueryParameters" level="DEBUG" />  <logger name="org.hibernate.engine.query.HQLQueryPlan" level="DEBUG" /> 
</configuration>

其中 也分 dev  test prod 三个环境的日志，是根据启动那个配置文件就调用 logback-spring.xml 中springProfile对应的日志方式，这也是springboot的方便之处

5. 实战测试

springboot只需要在pom中引入jpa和MySQL依赖就可以实现增删改查

controller 层 

@RestController
public class HelloWorldController {@Autowiredprivate GoodsRepository  goodsService;private final Logger logger = LoggerFactory.getLogger(this.getClass());  @SuppressWarnings("deprecation")@RequestMapping("/hello")public String index() {List<Goods> findByName = goodsService.findByName("哈哈");logger.debug("This is a debug message");  logger.info("This is an info message");  logger.warn("This is a warn message");  logger.error("This is an error message");  logger.info(findByName.toString());  return findByName.toString();}
}

@RestController 注解 相当于 @Controller 和 @ResponseBody 的二合一  很方便吧

service 层

@Service
public class GoodsService {@Autowired(required=true)private GoodsRepository  goodsDao;public List<Goods> findByName(String name){return goodsDao.findByName(name);}
}

repository 层 继承 JapRepository 就可以实现基本的crud

@Repository
public interface GoodsRepository extends JpaRepository<Goods, Integer> {	
}

6.启动项目测试

总结，springboot出现的目标就是减少配置文件，轻量级的框架，比如要想集成redis 只需要在pom中加入

依赖，然后直接引入如下

@Autowired

private StringRedisTemplate stringTemplate;

就可以使用redis了，就是这么的方便，是不是瞬间感觉开发简单了好多

项目源码 springboot项目源码