Spring boot 框架介绍
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1、泛型Service
以前Service写法
public abstract class BaseService<M extends Serializable> { private BaseRepository<M> repository; public void setRepository(BaseRepository<M> repository) { this.repository = repository; } public void save(M m) { repository.save(m); } } @Service public class UserService extends BaseService<User> { @Autowired public void setUserRepository(UserRepository userRepository) { setRepository(userRepository); } } @Service public class OrganizationService extends BaseService<Organization> { @Autowired public void setOrganizationRepository(OrganizationRepository organizationRepository) { setRepository(organizationRepository); } } 可以看到，以前必须再写一个setter方法，然后指定注入的具体类型，然后进行注入；
泛型Service的写法
public abstract class BaseService<M extends Serializable> { @Autowired protected BaseRepository<M> repository; public void save(M m) { repository.save(m); } } @Service public class UserService extends BaseService<User> { } @Service public class OrganizationService extends BaseService<Organization> { } 2、Spring boot 入门
1) 继承spring-boot-starter-parent
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.2.RELEASE</version> <relativePath/> <!-- lookup parent from repository --></parent>2) 引入spring-boot-starter-web包
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency></dependencies>3) 编写启动Class
@SpringBootApplicationpublic class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); }}4） 项目启动
有两张方式启动
在项目目录下执行mvn spring-boot:run
在DemoApplication 类中执行右键Run DemoApplication
至此SpringBoot项目已经完成
3 SpringBoot深入介绍
1) 页面渲染
静态文件放到src\main\resources目录访问时可以通过http://ip:port/cxt/static/js/***.js页面展现文件放到src\main\resources\templates目录下spring-boot 不推荐JSP可以通过freemarker、velocity、thymeleaf 等模板引擎freemarker:渲染文件以ftl结尾<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-freemarker</artifactId></dependency>velocity:渲染文件以vm结尾(SpringBoot 1.5.x之后已经不再支持Velocity)<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-velocity</artifactId> </dependency> thymeleaf:渲染文件以html结尾<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency>可同时支持freemarker和thymeleaf
2) 应用部署
添加插件<plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId></plugin>执行mvn clean package 可以得到demo-0.0.1-SNAPSHOT.jar
通过命令java -jar target/demo-0.0.1-SNAPSHOT.jar运行程序
3) 配置文件介绍
配置文件支持properties或yml文件，写法区别如下：
spring.redis.cluster.nodes[0]=192.168.0.1:6379 spring.redis.cluster.nodes[1]=192.168.0.2:6379 或 spring: redis: cluster: nodes: - 192.168.0.1:6379 - 192.168.0.2:6379 常用配置如下：server.port=8081 #项目启动端口号，默认为8080server.context-path=/demo #项目启动应用名称，默认为空控制日志级别
通过 logging.level.*= LEVEL(LEVEL是TRACE,DEBUG,INFO,WARN,FATAL,OFF)中的一个
这样表示项目中所有的日志级别都是一样的.也可以精准控制到具体的一块
logging.level.org.springframework.web: DEBUG //org.springframework.web包下面的日志级别是DEBUG的 logging.level.org.hibernate: ERROR //org.hibernate包下面的日志级别是ERROR logging.level.com.ibigsea.*: INFO //com.ibigsea包下面的日志级别是INFO Profile配置
Profile是Spring用来针对不同环境对不同配置提供支持的,全局Profile配置使用
application-{profile}.properties 如:application-prod.properties
在本地模拟出一个开发环境和生产环境
创建application-prd.properties 和 application-dev.properties
项目结构
application-dev.properties
server.port=8081 application-prd.properties
server.port=8082application.properties（设置启动环境）
spring.profiles.active=prd 除了上面这种配置方式,我们还有一种更简便的方式来配置多种环境,通过命令行参数配置
删除多余的properties文件 
application.yml
spring: profiles: active: prd---spring : profiles : prd server : port : 8081 ---spring : profiles : dev server : port : 8082 将程序打包之后 通过java -jar xx.jar –spring.profiles.active=dev的方式启动不通的配置环境
4) 使用actuator
添加依赖<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId></dependency>主要暴露的功能注：此时直接访问会报权限的问题需要在配置文件中配置management.security.enabled=false
5) SpringBoot集成mybatis
引入Mybatis相关联的jar
<dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.2.0</version></dependency><!--内存数据库可以直接使用不用配置数据源--><dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> <scope>runtime</scope></dependency>介绍使用annotation模式的Mybatis调用
编写实体类如下：
import java.io.Serializable;/** * @author Eddú Meléndez */public class City implements Serializable { private static final long serialVersionUID = 1L; private Long id; private String name; private String state; private String country; public Long getId() { return this.id; } public void setId(Long id) { this.id = id; } public String getName() { return this.name; } public void setName(String name) { this.name = name; } public String getState() { return this.state; } public void setState(String state) { this.state = state; } public String getCountry() { return this.country; } public void setCountry(String country) { this.country = country; } @Override public String toString() { return getId() + "," + getName() + "," + getState() + "," + getCountry(); }}编写Mapper
@Mapperpublic interface CityMapper { @Select("select * from city where state = #{state}") City findByState(@Param("state") String state);}在Service层调用Mapper
@Autowired private CityMapper cityMapper;Mybatis调用已经完成
6) SpringBoot集成sitemesh
Sitemesh是一种页面装饰技术 ： 它通过过滤器(filter)来拦截页面访问 根据被访问页面的URL找到合适的装饰模板 提取被访问页面的内容，放到装饰模板中合适的位置 最终将装饰后的页面发送给客户端。在pom.xml中添加相应的Jar 配置文件
<dependency> <groupId>org.sitemesh</groupId> <artifactId>sitemesh</artifactId></dependency>编写Filter类
import org.sitemesh.builder.SiteMeshFilterBuilder;import org.sitemesh.config.ConfigurableSiteMeshFilter;public class WebSiteMeshFilter extends ConfigurableSiteMeshFilter { @Override protected void applyCustomConfiguration(SiteMeshFilterBuilder builder) { builder.addDecoratorPath("/*", "/main") .addExcludedPath("/main") .addExcludedPath("/login") .addExcludedPath("/static/*"); }}在应用程序入口文件中此处在DemoApplication类中实现Filter注册bean
@Bean public FilterRegistrationBean siteMeshFilter(){ FilterRegistrationBean fitler = new FilterRegistrationBean(); WebSiteMeshFilter siteMeshFilter = new WebSiteMeshFilter(); fitler.setFilter(siteMeshFilter); return fitler; }最后编写如下模板文件如下：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>TPA- <sitemesh:write property='title'/> </title> <script type="text/javascript" src="${request.contextPath}/static/js/jquery-1.11.1.min.js"></script> <script type="text/javascript" src="${request.contextPath}/static/js/msg.js"></script> <!-- We support more than 40 localizations --> <script type="text/javascript" src="${request.contextPath}/static/js/i18n/grid.locale-cn.js"></script> <!-- This is the Javascript file of jqGrid --> <script type="text/javascript" src="${request.contextPath}/static/js/jquery.jqGrid.min.js"></script> <script type="text/javascript" src="${request.contextPath}/static/js/jqgrid.extend.js"></script> <!-- This is the localization file of the grid controlling messages, labels, etc. <!-- A link to a jQuery UI ThemeRoller theme, more than 22 built-in and many more custom --> <link rel="stylesheet" href="${request.contextPath}/static/css/bootstrap.min.css"> <link rel="stylesheet" href="${request.contextPath}/static/css/msg.css"><#--<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">--> <!-- The link to the CSS that the grid needs --> <link rel="stylesheet" type="text/css" media="screen" href="${request.contextPath}/static/css/ui.jqgrid-bootstrap.css"/> <sitemesh:write property='head'/> <script> $.jgrid.defaults.width = 1140; $.jgrid.defaults.height = 560; $.jgrid.defaults.styleUI = 'Bootstrap'; </script> <script type="text/javascript" src="${request.contextPath}/static/js/bootstrap.min.js"></script> <style type="text/css"> .navbar { margin-bottom: 0px; } /*选择框高度调整*/ select[multiple], select[size] { height: 34px; } </style></head><body><div class="container"> <nav class="navbar navbar-default"> <div class="container-fluid"> <div class="navbar-header"> <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1"> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <#--<a class="navbar-brand" href="/bbs/bbs/index">--> <#--<svg viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="1880"><path d="M832.299957 714.965621c-71.047126 88.067778-148.2126 70.077032-148.2126 70.077032 77.615729-65.686025 74.107835-233.597269 74.107835-233.597269 56.979736 6.564509 74.104765 93.439112 74.104765 93.439112 2.635013 53.857629 148.21567 93.439112 148.21567 93.439112C887.304711 721.78698 832.299957 714.965621 832.299957 714.965621zM513.173732 467.12086c0 0-26.707268-15.610536-21.554922-82.356706 0 0 43.672662-370.594433 237.145072-313.196165 0 0 128.243803 88.283696-21.580504 292.610314C707.182354 364.178303 570.780755 504.72634 513.173732 467.12086zM560.578392 504.72634c31.834033 103.172801-49.409316 210.239282-49.409316 210.239282-95.057983 32.713053-67.633377-56.756655-67.633377-56.756655 58.984393-61.013609 42.930765-130.125663 42.930765-130.125663C512.189312 506.013659 560.578392 504.72634 560.578392 504.72634zM214.740806 668.246577c0 0-15.826454-68.054979 9.243525-99.791797 0 0 19.540032 53.137221 64.86431 6.345522 0 0 13.948687-61.868069-50.226938-47.768957 0 0 21.086248-69.096704 66.274426-103.007025-82.760912-100.30652-238.370992-82.821287-238.370992-82.821287-51.842739-30.236652 0-46.715975 0-46.715975 135.454018-0.991584 222.324528 93.439112 222.324528 93.439112-23.989367-126.739543-148.21567-163.520237-148.21567-163.520237-39.818891-48.290843 17.485233-35.68371 17.485233-35.68371 126.141932 81.534991 149.874449 190.310394 154.345274 230.244918 20.531616-12.791327 45.414329-18.281365 75.196633-7.67889 0 0 156.796092 73.606415-24.702612 256.95935C362.956476 668.246577 246.483764 776.989233 214.740806 668.246577zM706.990996 513.219781c30.182416 116.948549-22.903639 201.74584-22.903639 201.74584-59.500139 125.21891-148.21567 46.719044-148.21567 46.719044 93.910856-94.708012 98.807377-256.95935 98.807377-256.95935C675.925467 502.981602 706.990996 513.219781 706.990996 513.219781z" p-id="1881"></path></svg>--> <#--Beetl-BBS--> <#--</a>--> </div> <!-- Collect the nav links, forms, and other content for toggling --> <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1"> <ul class="nav navbar-nav"> <li id="personManagerLi"><a href="${request.contextPath}/manager/classify">类型管理</a></li> <li id="employeeManagerLi"><a href="${request.contextPath}/system/employee">用户管理</a></li> <li id="roleManagerLi"><a href="${request.contextPath}/system/role">角色管理</a></li> <li id="resourceManagerLi"><a href="${request.contextPath}/system/resource">资源管理</a></li> <li id="resourceManagerLi"><a href="${request.contextPath}/system/method">方法管理</a></li> <li class="dropdown"> <a href="#" class="dropdown-toggle" data-toggle="dropdown">板块 <span class="caret"></span></a> <ul class="dropdown-menu" role="menu"> <li><a href="#">AAA </a></li> <li><a href="#">BBB </a></li> <li><a href="#">CCC </a></li> </ul> </li> </ul> <form class="navbar-form navbar-left"> <div class="form-group"> <input type="text" class="form-control" id="keyword" placeholder="关键字搜索"> </div> <button type="button" class="btn btn-default" id="serach-btn">搜索</button> </form> <form id="logoutForm" action='${request.contextPath}/logout' method='post'> </form> <ul class="nav navbar-nav navbar-right"> <li> <a href="javascript:$('#logoutForm').submit();" data-toggle="modal"><i class="fa fa-sign-in"></i> 退出</a> </li> <li><a href="#reg-dialog" data-toggle="modal"><i class="fa fa-user-plus"></i> 注册</a></li> </ul> </div><!-- /.navbar-collapse --> </div><!-- /.container-fluid --> </nav> <sitemesh:write property='body'/></div></body></html>7) SpringBoot单元测试
Controller层测试如下使用MockMvc
@RunWith(SpringRunner.class)@SpringBootTestpublic class TpaSecurityApplicationTests { @Autowired private RoleController roleController; private MockMvc mvc; @Before public void setUp() throws Exception { mvc = MockMvcBuilders.standaloneSetup(roleController).build(); } @Test public void contextLoads() throws Exception { RequestBuilder request = null; request = get("/system/role/1"); mvc.perform(request) .andExpect(status().isOk()); request = put("/system/role/1") .param("name", "测试终极大师"); // 4、put修改id为1的user mvc.perform(request); }}services mapper 层测试更简单
import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest;import org.springframework.test.context.junit4.SpringRunner;import static org.assertj.core.api.Assertions.assertThat;@RunWith(SpringRunner.class)@SpringBootTestpublic class DemoApplicationTests { @Autowired private CityMapper cityMapper; @Test public void contextLoads() { } @Test public void findByStateTest() { City city = cityMapper.findByState("CA"); assertThat(city.getName()).isEqualTo("San Francisco"); assertThat(city.getState()).isEqualTo("CA"); assertThat(city.getCountry()).isEqualTo("US"); }}4 IDEA Spring boot 热部署
1) CTRL + SHIFT + A –> 查找make project automatically –> 选中 此处可以更新页面展示文件
2) 使用spring-boot-1.3开始有的热部署功能
加maven依赖
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> </dependency> 开启热部署
<build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <fork>true</fork> </configuration/> </plugin> </plugins></build>注：此时热部署更改文件class文件之后整个项目重启，时间可能比较长但是启动比较彻底
3) 使用springreload插件重启,
project 节点下添加：
<build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>springloaded</artifactId> <version>1.2.6.RELEASE</version> </dependency> </dependencies> </plugin> </plugins></build>注：修改class类时热部署，不会整个项目重启，修改比较快速，但是需要mvn spring-boot:run启动项目才可以热部署
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