Spring-Boot框架初步搭建
一、简介
springmvc是非常伟大的框架,开源,发展迅速。优秀的设计必然会划分、解耦。所以,spring有很多子项目,比如core、context、bean、mvc等。这对知根底的人来说很简单明了,然而springmvc就是为了傻瓜式的操作而发明的。对于初学springmvc的人来说,想要入手就开发需要拷贝一连串的dependency而不知道这个是干嘛,不知道是不是少了依赖。像我刚接触springmvc的时候到处百度教程而发现各有不同,于是复制了一个又一个代码却不能自己设置,根本原因是不了解各个依赖的包。
spring-boot 正是为了解决繁复的代码配置而产生的。spring-boot 也是基于java-base 开发的代码,及不用xml文件配置,所有代码都由java来完成。还可以加入groovy的动态语言执行。
二、搭建一个基本的web-mvc 项目
2.1 configure environment
- java 1.8+
- maven 3.3+
- spring-boot 1.3.5
- idea 15
- thymeleaf 3
2.2 start
在idea中,选择new-》maven创建一个空的maven项目,比如名字springboot-test。
2.2.1pom.xml
设定java版本:
<properties> <java.version>1.8</java.version> </properties>
添加依赖版本管理dependencymanagement
<dependencymanagement> <dependencies> <dependency> <!-- import dependency management from spring boot --> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-dependencies</artifactid> <version>1.3.5.release</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencymanagement>
添加spring-web项目依赖
<dependencies> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-web</artifactid> </dependency> <dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-devtools</artifactid> <optional>true</optional> </dependency> </dependencies>
添加build-plugin
<build> <plugins> <plugin> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-maven-plugin</artifactid> <configuration> <fork>true</fork> </configuration> </plugin> </plugins> </build>
如此,一个简单的restful的webservice的项目就搭建好了。如果想要支持视图渲染,即jsp、freemark、velocity等,添加对应的依赖即可。比如,我使用thymeleaf模板:
<dependency> <groupid>org.springframework.boot</groupid> <artifactid>spring-boot-starter-thymeleaf</artifactid> </dependency>
2.2.2 创建java代码
如果新建项目的名字是:springboot-test. 则创建包springboot-test/src/main/java/com/test.
com +- example +- myproject +- application.java | +- domain | +- customer.java | +- customerrepository.java | +- service | +- customerservice.java | +- web +- customercontroller.java
com.test是我们的基本包名。下面创建配置类com.test.appconfig。
package com.test;
import org.springframework.boot.springapplication; import org.springframework.boot.autoconfigure.springbootapplication; /** * created by miaorf on 2016/6/19. */ @springbootapplication public class appconfig { public static void main(string[] args) { springapplication.run(appconfig.class); } }
@springbootapplication 标注启动配置入口,可以发现通过一个main方法启动。使用这个注解的类必须放置于最外层包中,因为默认扫描这个类以下的包。否则需要自己配置@componentscan。
这样,配置基本完成了。下面开发控制层controller:
创建com.test.controller.hellocontroller。
package com.test.controller; import org.springframework.stereotype.controller; import org.springframework.ui.model; import org.springframework.web.bind.annotation.requestmapping; import org.springframework.web.bind.annotation.responsebody; import java.util.hashmap; import java.util.map; /** * created by miaorf on 2016/6/19. */ @controller public class hellocontroller { @requestmapping("/index") public string index(model model){ model.addattribute("name","ryan"); return "index"; } @requestmapping("/json") @responsebody public map<string,object> json(){ map<string,object> map = new hashmap<string,object>(); map.put("name","ryan"); map.put("age","18"); map.put("sex","man"); return map; } }
创建视图代码:
视图默认放在springboot-test\src\main\resources\templates**.
所以创建springboot-test\src\main\resources\templates\index.html
<!doctype html> <html xmlns:th="http://www.thymeleaf.org"> <head> <title>getting started: serving web content</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> </head> <body> <p th:text="'hello, ' + ${name} + '!'" /> </body> </html>
d:\workspace\springboot\springboot-test\src\main\webapp\hello.html
<!doctype html> <html> <head> <title>getting started: serving web content</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> </head> <body> hello, this is static page. not resolve by server, just the html. </body> </html>
2.2.3 run
启动方式多种,可以启动main方法,也可以通过命令行启动:
d:\temp\springboot-test>mvn spring-boot:run [info] scanning for projects... [warning] [warning] some problems were encountered while building the effective model for com.test:springboot-test:jar:1.0-snapshot [warning] 'build.plugins.plugin.version' for org.springframework.boot:spring-boot-maven-plugin is missing. @ line 49, column 21 [warning] [warning] it is highly recommended to fix these problems because they threaten the stability of your build. [warning] [warning] for this reason, future maven versions might no longer support building such malformed projects. [warning] [info] [info] ------------------------------------------------------------------------ [info] building springboot-test 1.0-snapshot [info] ------------------------------------------------------------------------ [info] [info] >>> spring-boot-maven-plugin:1.3.5.release:run (default-cli) > test-compile @ springboot-test >>> [info] [info] --- maven-resources-plugin:2.6:resources (default-resources) @ springboot-test --- [warning] using platform encoding (gbk actually) to copy filtered resources, i.e. build is platform dependent! [info] copying 2 resources [info] [info] --- maven-compiler-plugin:3.1:compile (default-compile) @ springboot-test --- [info] nothing to compile - all classes are up to date [info] [info] --- maven-resources-plugin:2.6:testresources (default-testresources) @ springboot-test --- [warning] using platform encoding (gbk actually) to copy filtered resources, i.e. build is platform dependent! [info] skip non existing resourcedirectory d:\temp\springboot-test\src\test\resources [info] [info] --- maven-compiler-plugin:3.1:testcompile (default-testcompile) @ springboot-test --- [info] no sources to compile [info] [info] <<< spring-boot-maven-plugin:1.3.5.release:run (default-cli) < test-compile @ springboot-test <<< [info] [info] --- spring-boot-maven-plugin:1.3.5.release:run (default-cli) @ springboot-test --- [info] attaching agents: [] . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: spring boot :: (v1.3.5.release)
浏览器访问:localhost:8080/index
demo下载路径:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。