spring boot记录

package com.lylboot.firstBoot.service.impl;import java.util.List;import org.junit.Assert;import org.junit.Before;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.http.MediaType;import org.springframework.test.context.junit4.SpringRunner;import org.springframework.test.web.servlet.MockMvc;import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;import org.springframework.test.web.servlet.result.MockMvcResultHandlers;import org.springframework.test.web.servlet.result.MockMvcResultMatchers;import org.springframework.test.web.servlet.setup.MockMvcBuilders;import com.lylboot.firstBoot.Application;import com.lylboot.firstBoot.bo.Student;import com.lylboot.firstBoot.controller.StudentMybatisController;import com.lylboot.firstBoot.dao.StudentDao;import com.lylboot.firstBoot.service.StudentServiceMy;/** * spring boot 单元测试 分别对 dao  service  controller 层进行测试 * @author lylRi * */@RunWith(SpringRunner.class)@SpringBootTest(classes= Application.class)// 启动spring boot类 runpublic class StudentServiceTest {@Testpublic void testDao() {System.out.println(studentDao.count());Assert.assertEquals(2, studentDao.count());}@Autowiredprivate StudentDao studentDao;@Autowiredprivate StudentServiceMy studentServiceMy;@Testpublic void testService(){List<Student> stus = studentServiceMy.getStudents();Assert.assertEquals(2, stus.size());}private MockMvc mvc;@Autowiredprivate StudentMybatisController studentMybatisController;@Beforepublic void setUp(){// mockMvc = MockMvcBuilders.webAppContextSetup(wac).build(); 项目拦截器有效mvc = MockMvcBuilders.standaloneSetup(studentMybatisController).build();//对单个controller}@Testpublic void getStudentController(){String str = "/studentMy/get";try {mvc.perform(MockMvcRequestBuilders.get(str).accept(MediaType.APPLICATION_JSON)).andExpect(MockMvcResultMatchers.status().isOk()).andDo(MockMvcResultHandlers.print()).andReturn();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();} /*RequestBuilder request = MockMvcRequestBuilders.get(str) .contentType(MediaType.APPLICATION_JSON);  try {MvcResult mvcResult = mvc.perform(request).andReturn();System.out.println(mvcResult.getResponse().getContentAsString());} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}*/}}

因现在使用spring家族系的功能越来越多，常用的spring springMVC mybatis等框架带来的配置文件也越多，极不方便；因 约定优先配置 的思想

正是这种背景下 spring boot 孕育而生，它本身并不能替代spring 核心功能及扩展，而是结合spring 及集成了很多常用的第三方库配置，这些第三方库开箱即用，只需简单的配置，这样开发者主要关注于业务逻辑。

传统基于spring Javaweb 应用，我们需要配置web.xml 及applicationContext.xml 等 打包成war 部署在应用服务器eg:Tomcat中。

使用spring boot

采用 maven 构建一个工程  pom.xml 配置

<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.lylboot</groupId>  <artifactId>firstBoot</artifactId>  <version>0.0.1-SNAPSHOT</version>  <packaging>jar</packaging><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.0.0.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>  <properties>    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  </properties>  <dependencies>      <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency>    <dependency>      <groupId>junit</groupId>      <artifactId>junit</artifactId>      <scope>test</scope>    </dependency>  </dependencies></project>

package com.lylboot.firstBoot;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.EnableAutoConfiguration;import org.springframework.context.annotation.Configuration;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;@Configuration@EnableAutoConfiguration@RestControllerpublic class Application {@RequestMapping("/")String home(){return "hello world";}public static void main(String[] args) {SpringApplication.run(Application.class, args);}}

使用内嵌的Tomcat

最简单例子好了；

@SpringBootApplication  

代替 

@Configuration
@EnableAutoConfiguration
@ComponentScan

--------------------------------------------------

@ComponentScan 默认扫描路径 main所在的类包下的注解 eg: @RestController 等  如果不在main方法类包路径下下，你需要指定 通过 @ComponentScan("你的包路径")

如果指定路径则默认的不起作用，都需要手动加上。

controller中的使用方式与spring mvc 一样

--------------------------------------------------------------添加jdbc 访问MySQL数据库

pom.xml 添加配置：

在上面基础上添加

<!-- MYSQL --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId></dependency><!-- Spring Boot JDBC --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency>

在/java/main/resource下添加

application.properties

spring.datasource.url=jdbc\:mysql\://10.188.53.246\:3306/test?useUnicode\=true&characterEncoding\=utf-8spring.datasource.username=rootspring.datasource.password=123456spring.datasource.driver-class-name=com.mysql.jdbc.Driverspring.datasource.max-idle=10spring.datasource.max-wait=10000spring.datasource.min-idle=5spring.datasource.initial-size=5spring.datasource.validation-query=SELECT 1spring.datasource.test-on-borrow=falsespring.datasource.test-while-idle=truespring.datasource.time-between-eviction-runs-millis=18800spring.datasource.jdbc-interceptors=ConnectionState;SlowQueryReport(threshold=0)

----------------------------------------使用mybatis 采用mapper.xml 配置

 基于上面的pom 

<!-- mybatis --><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.3.1</version></dependency>

启动main 添加扫描 

@MapperScan("com.lylboot.firstBoot.dao")

@Configuration@EnableAutoConfiguration@ComponentScan("com.lylboot.boot,com.lylboot.firstBoot.*")@MapperScan("com.lylboot.firstBoot.dao")public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}}

最后单元测试：

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency>