SpringBoot Helloworld 测试 Maven项目

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  .   ____          _            __ _ _ /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/  ___)| |_)| | | | | || (_| |  ) ) ) )  '  |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot ::        (v1.3.0.RELEASE)

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SpringBoot

化繁为简，简化配置

SpringBoot官方：http://projects.spring.io/spring-boot/
SpringBoot使用介绍：http://blog.csdn.net/isea533/article/details/50278205

Maven项目使用SpringBoot

建议使用 IDEA ,虽然下面是 Eclipse 测试的例子

配置SpringBoot

pom.xml

<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/maven-v4_0_0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.springboot</groupId>    <artifactId>SpringBootTest</artifactId>    <packaging>war</packaging>    <version>0.0.1-SNAPSHOT</version>    <name>SpringBootTest Maven Webapp</name>    <url>http://maven.apache.org</url>    <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <java.version>1.8</java.version>        <tomcat.version>7.0.55</tomcat.version>    </properties>    <parent>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-parent</artifactId>        <version>1.3.0.RELEASE</version>    </parent>    <dependencies>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-web</artifactId>        </dependency>    </dependencies></project>

运行程序

运行main方法

SampleController.java

package com.hello;import java.util.Date;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.EnableAutoConfiguration;import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestController@EnableAutoConfiguration (exclude={DataSourceAutoConfiguration.class})public class SampleController {    @RequestMapping("/")    String home() {        return "Hello World!";    }    @RequestMapping("/now")    String hehe() {        return "现在时间：" + (new Date()).toLocaleString();    }    public static void main(String[] args) throws Exception {        SpringApplication.run(SampleController.class, args);    }}

控制台输出：

  .   ____          _            __ _ _ /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/  ___)| |_)| | | | | || (_| |  ) ) ) )  '  |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot ::        (v1.3.0.RELEASE)2016-12-15 16:30:13.765  INFO 20952 --- [           main] com.hello.SampleController               : Starting SampleController on DESKTOP-QSFD0OC with PID 20952 (D:\eclipse4.61\eclipse\workspace\SpringBootTest\target\classes started by Peng in D:\eclipse4.61\eclipse\workspace\SpringBootTest)2016-12-15 16:30:13.768  INFO 20952 --- [           main] com.hello.SampleController               : No profiles are active2016-12-15 16:30:13.803  INFO 20952 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@149494d8: startup date [Thu Dec 15 16:30:13 CST 2016]; root of context hierarchy...

在浏览器上输入地址http://localhost:8080/

在浏览器上输入地址http://localhost:8080/now

注意事项

Tomcat问题一

在Java Build Path中，不要加入 Tomcat 运行环境的依赖库，已经在pom.xml中指定了 Tomcat 版本（不指定默认为 Tomcat 8.0.28），从 maven 的依赖包中能找到 Tomcat 的jar包，SpringBoot 自己配有 Tomcat 。

可以参考：http://blog.csdn.net/zhang168/article/details/51423905

Tomcat问题二

运行 main 方法，出现 Tomcat 不能启动的错误。如下面的异常信息

java.net.BindException: Address already in use: bind    at sun.nio.ch.Net.bind0(Native Method) ~[na:1.8.0_91]    at sun.nio.ch.Net.bind(Unknown Source) ~[na:1.8.0_91]    at sun.nio.ch.Net.bind(Unknown Source) ~[na:1.8.0_91]org.apache.catalina.LifecycleException: Failed to start component [Connector[org.apache.coyote.http11.Http11NioProtocol-8080]]Caused by: org.apache.catalina.LifecycleException: service.getName(): "Tomcat";  Protocol handler start failed    at org.apache.catalina.connector.Connector.startInternal(Connector.java:1014) ~[tomcat-embed-core-7.0.55.jar:7.0.55]    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) ~[tomcat-embed-core-7.0.55.jar:7.0.55]    ... 13 common frames omittedCaused by: java.net.BindException: Address already in use: bind Unable to start embedded Tomcat servlet container Caused by: java.lang.IllegalStateException: Tomcat connector in failed state

原因是你运行了程序一次，javaw.exe 会占用你的端口，可以结束该进程。重新运行 main 方法