spring boot初探

听说spring boot零配置，挺好用，我也来试用下。

1.创建Maven项目，配置pom.xml（部分依赖包在此demo中没有用到，此demo只用到spring-boot-starter-parent、spring-boot-starter-web，其他的会在往后的实际项目中用到，所以也贴了出来，大家各取所需）

<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.test</groupId>
  <artifactId>tboot</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  
  <parent>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-parent</artifactId>
      <version>1.3.7.RELEASE</version><!-- 1.5.7.RELEASE -->
  </parent>
  
  <dependencies>
  	<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-freemarker</artifactId>
    </dependency>
    
    <!-- 日志 -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
        <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-logging</artifactId>
            </exclusion>
        </exclusions>
     </dependency>
     <dependency> 
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-log4j</artifactId>
     </dependency>
     
     <dependency>
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
	 </dependency>
     <dependency>
	    <groupId>org.mybatis.spring.boot</groupId>
	    <artifactId>mybatis-spring-boot-starter</artifactId>
	    <version>1.0.0</version>
	</dependency>
	<dependency>  
        <groupId>com.zaxxer</groupId>  
        <artifactId>HikariCP</artifactId>  
    </dependency>
    
    <dependency>
	    <groupId>redis.clients</groupId>
	    <artifactId>jedis</artifactId>
	    <version>2.8.1</version>
	</dependency>
	
	<dependency>
		<groupId>javax.servlet.jsp</groupId>
		<artifactId>jsp-api</artifactId>
		<version>2.2</version>
		<!-- <scope>provided</scope> -->
	</dependency>
	<dependency>
		<groupId>javax.servlet</groupId>
		<artifactId>jstl</artifactId>
	</dependency>
	
	<dependency>
		<groupId>org.apache.commons</groupId>
		<artifactId>commons-lang3</artifactId>
		<version>3.1</version>
	</dependency>
	<dependency><!-- 带反射机制 -->
	  <groupId>commons-beanutils</groupId>
	  <artifactId>commons-beanutils-core</artifactId>
	  <version>1.8.3</version>
	</dependency>
	<dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.4</version>
    </dependency>
    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.3.1</version>
    </dependency>
    
    <dependency>
		<groupId>com.google.code.gson</groupId>
		<artifactId>gson</artifactId>
		<version>2.5</version>
	</dependency>
  </dependencies>
  
  <build>
  	<finalName>tboot</finalName>
  	<plugins>
  		<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>
  		<!-- <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
                <fork>true</fork>
                <mainClass>${start-class}</mainClass>
            </configuration>
              <executions>
                <execution>
                  <goals>
                    <goal>repackage</goal>
                  </goals>
                </execution>
            </executions>
        </plugin>
        -->
        
        <plugin>
		   <groupId>org.springframework.boot</groupId>
		   <artifactId>spring-boot-maven-plugin</artifactId>
		   <configuration>
		      <layout>ZIP</layout>
		      <minimizeJar>true</minimizeJar>
		   </configuration>
		</plugin>
        
  	</plugins>
  </build>
</project>

 

2.编码Controller、Run

@RestController //@RestController相当于@Controller+@ResponseBody
@RequestMapping("/test")
public class HelloController {
	
	@RequestMapping("/hello")
        public String getHello() {
                return "Hello Spring Boot .....";
        }
	

}

 

//@SpringBootApplication所在类的同级包以及下级包里的所有bean
@SpringBootApplication
@ServletComponentScan
// 使用@ServletComponentScan注解后，Servlet、Filter、Listener可以直接通过@WebServlet、@WebFilter、@WebListener注解自动注册
public class Run implements EmbeddedServletContainerCustomizer {

	// 修改访问的默认端口
	@Override
	public void customize(ConfigurableEmbeddedServletContainer container) {
		container.setPort(80);
	}

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

}

3.启动项目，进入Run.java，右键运行java application

4.打开浏览器访问：localhost/test/hello

好吧，真的很简单，sping和web的配置都不用。关键是部署到Linux要怎么办？

也很简单，打包后是一个可执行的jar包，将这jar包放到Linux服务器上，通过命令：

java -jar project.jar

即可启动项目，无需tomcat容器。

简单归简单，但也有问题。平常接触的项目基本都会在web.xml配置过滤器，监听器，在mvc上配置拦截器等等，而spring boot没有这些配置文件，那这些配置，在代码怎样实现？继续深入……