spring boot 学习笔记

spring boot cli

创建maven项目的pom.xml

https://start.spring.io/ 可以自动生成很多弄好的pom

<?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.example</groupId>
    <artifactId>myproject</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.1.BUILD-SNAPSHOT</version>
    </parent>

    <!-- Additional lines to be added here... -->

    <!-- (you don't need this if you are using a .RELEASE version) -->
    <repositories>
        <repository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/snapshot</url>
            <snapshots><enabled>true</enabled></snapshots>
        </repository>
        <repository>
            <id>spring-milestones</id>
            <url>http://repo.spring.io/milestone</url>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/snapshot</url>
        </pluginRepository>
        <pluginRepository>
            <id>spring-milestones</id>
            <url>http://repo.spring.io/milestone</url>
        </pluginRepository>
    </pluginRepositories>
</project>

编写代码运行

并添加一个名为src/main/java/Example.java的文件

import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.stereotype.*;
import org.springframework.web.bind.annotation.*;

@RestController
@EnableAutoConfiguration
public class Example {

    @RequestMapping("/")
    String home() {
        return "Hello World!";
    }

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

}

由于使用了spring-boot-starter-parent POM，这样我们就有了一个非常有用的run目标来启动程序

mvn spring-boot:run

创建可执行jar

pom.xml中 dependencies节点后面插入

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

运行mvn package打包
查看target目录，你应该可以看到myproject-0.0.1-SNAPSHOT.jar
查看内部结构jar tvf target/myproject-0.0.1-SNAPSHOT.jar
执行程序
java -jar target/myproject-0.0.1-SNAPSHOT.jar

修改项目内嵌tomcat的默认端口号8080

参考 http://blog.csdn.net/argel_lj/article/details/49851625
采用TomcatEmbeddedServletContainerFactory方法修改

import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.*;
import org.springframework.web.bind.annotation.*;

@RestController
@EnableAutoConfiguration
public class Example {

    @RequestMapping("/")
    String home() {
        return "Hello World!";
    }

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

    @Bean
    public EmbeddedServletContainerFactory  servletContainer(){
        TomcatEmbeddedServletContainerFactory factory=new TomcatEmbeddedServletContainerFactory();
        factory.setPort(9999);
        return factory;
    }

}