昨天无意间看到Spring Boot ,今天又了解了一下，试着写一个Hello World!  今天看了半天，最后还是要用Maven最方便！以下：

    一、工具 

       JDK1.7

       Eclipse

       Maven

       这里Eclipse集成Maven的这一步就省了！

   二、编码

      新建Maven Project 命名为：SpringBoot 选项如图

2、修改工程目录，添加源文件夹后目录如下：

 

3、修改pom.xml文件如下：

 

4、编辑JAVA代码新建APP.class

package com.lgp.SpringBoot;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.EnableAutoConfiguration;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestController@EnableAutoConfigurationpublic class App {      @RequestMapping("/h")      public String home() {        return "Hello";      }          @RequestMapping("/w")      public String word() {        return "World";      }          public static void main( String[] args )    {        System.out.println( "Hello World ! App!" );        SpringApplication.run(App.class, args);        //SpringApplication.run(UserController.class, args);    }}

运行此代码 服务端口默认8080  访问localhost:8080/h  展示Hello

 localhost:8080/w 展示World

OK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

---------------风格线---------------------

 新建RestController风格的Controller

新建UserController

package com.lgp.SpringBoot;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@ComponentScan@Configuration@RestController@RequestMapping("/user")public class UserController {    @RequestMapping("/{id}")    public User getUser(@PathVariable String id){        User user  = new User();        user.setId(id);        user.setUsername("id==="+Math.random());        return user;    }             private class User{                private  String id;        private  String username;                public String getId() {            return id;        }        public void setId(String id) {            this.id = id;        }        public String getUsername() {            return username;        }        public void setUsername(String username) {            this.username = username;        }    }}

需修改App.java

package com.lgp.SpringBoot;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.EnableAutoConfiguration;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestController@EnableAutoConfigurationpublic class App {      @RequestMapping("/h")      public String home() {        return "Hello";      }          @RequestMapping("/w")      public String word() {        return "World";      }          public static void main( String[] args )    {        System.out.println( "Hello World ! App!" );        //SpringApplication.run(App.class, args);        SpringApplication.run(UserController.class, args);    }}

运行App.java 访问 

 

新建其他Controller

package com.lgp.SpringBoot;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@ComponentScan@Configuration@RestController@RequestMapping("/file")public class FileController {    @RequestMapping("/name")    public String getFileName(){                return "filename.....";    }    }

重启程序 访问

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    修改默认端口

    一、

package com.lgp.SpringBoot;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer;import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestController@SpringBootApplicationpublic class MainApplication implements EmbeddedServletContainerCustomizer{    @Override    public void customize(ConfigurableEmbeddedServletContainer container) {                container.setPort(8011);    }        public static void main(String[] args) {//        SpringApplication.run(MainApplication.class, args);        SpringApplication.run(FileController.class, args);    }    @RequestMapping("/main")    public String testPort(){                return "Hello 端口8011......";    }}

   二、

package com.lgp.SpringBoot;import java.util.concurrent.TimeUnit;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.EnableAutoConfiguration;import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;import org.springframework.context.annotation.Bean;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@RestController@EnableAutoConfigurationpublic class App {      @RequestMapping("/h")      public String home() {        return "Hello";      }          @RequestMapping("/w")      public String word() {        return "World";      }          public static void main( String[] args )    {        System.out.println( "Hello World ! App!" );        //SpringApplication.run(App.class, args);        SpringApplication.run(UserController.class, args);    }        @Bean    public EmbeddedServletContainerFactory servletFactory(){        TomcatEmbeddedServletContainerFactory tomcatFactory =                 new TomcatEmbeddedServletContainerFactory();        tomcatFactory.setPort(8011);        tomcatFactory.setSessionTimeout(10,TimeUnit.SECONDS);        return tomcatFactory;            }}

修改为8011

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