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spring-boot-hello-world

2016-12-27 10:01 411 查看

什么是spring-boot

原来JavaEE工程使用spring的时候需要引入很多相关的依赖包，对于不怎么熟悉spring相关依赖的同学还是有一定难度的。spring-boot就是为了简化spring的手动配置依赖，spring-boot本身集成了tomcat，不需要再打成war发布到tomcat中，直接运行即可。

工程结构

依赖包

配置pom.xml

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
</parent>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<!--页面渲染模板引擎-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

以jar包形式引入jQuery

<dependency>
<groupId>org.webjars.bower</groupId>
<artifactId>jquery</artifactId>
<version>3.1.1</version>
</dependency>

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

工程代码

application.properties

#服务端口通过该配置修改
server.port=8080

########################################################
###THYMELEAF (ThymeleafAutoConfiguration)
########################################################
#spring.thymeleaf.prefix=classpath:/templates/
#spring.thymeleaf.suffix=.html
#spring.thymeleaf.mode=HTML5
#spring.thymeleaf.encoding=UTF-8
# ;charset=<encoding> is added
#spring.thymeleaf.content-type=text/html
# set to false for hot refresh

spring.thymeleaf.cache=false

Application.java

主程序，工程启动入口。

package com.itclj;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

TemplateController.java

package com.itclj.demo.controller;

import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@ComponentScan
public class TemplateController {

private final Logger logger = LoggerFactory.getLogger(this.getClass());

@RequestMapping("/")
String home() {
return "index";
}

@RequestMapping("/hello")
public String helloHtml(Map<String,Object> map){

logger.debug("==========debug");
logger.warn("===========warn");
logger.info("===========info");
logger.error("==========error");

map.put("hello","from TemplateController.helloHtml");
return"/hello";
}

}

index.html

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"  xmlns:th="http://www.thymeleaf.org"  >
<head>
<title>首页</title>
<link rel="stylesheet" type="text/css" href="/css/index.css"/>
<script src="/webjars/jquery/3.1.1/dist/jquery.min.js"></script>
<script src="/js/index.js"></script>
</head>
<body>
首页
<div class="bkColor">=================</div>
<p th:text="'Hello, iiiiiii!'" />
</body>
</html>

logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<include resource="org/springframework/boot/logging/logback/base.xml"/>

<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>spring-boot-demo.log</file>
<rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
<fileNamePattern>spring-boot-demo.%i.log.zip</fileNamePattern>
<minIndex>1</minIndex>
<maxIndex>3</maxIndex>
</rollingPolicy>

<triggeringPolicy class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
<maxFileSize>10MB</maxFileSize>
</triggeringPolicy>
<encoder>
<pattern>%date [%thread] %-5level %logger - %msg%n</pattern>
</encoder>
</appender>

<logger name="com.itclj.demo.controller.TemplateController" level="WARN" additivity="false">
<appender-ref ref="CONSOLE"/>
<appender-ref ref="FILE"/>
</logger>

</configuration>

运行

IDE中运行

在IDE中直接运行Application.java中的main函数即可启动应用。

发布成jar包运行

maven打成jar包，或IDE打成jar包

执行java -jar spring-boot-demo.jar

mav命令运行

mvn spring-boot-demo:run

测试

在浏览器中输入如下地址便可访问服务。

http://127.0.0.1:8080/

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标签： spring

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