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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
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：
我要评论
<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\
<!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：
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