SpingBoot从入门到入门（一）

SpingBoot从入门到入门（一）

做了三年安卓，除了底层和一些偏门的没有接触过，其他大致都可以胜任，人这种动物就是这样，和一件事物朝夕相处总会有割舍不了的感情，对于安卓我谈不上喜欢，但觉得很有感情，要放下它去找重拾别的开发很难。但是在三年的安卓开发也让我认识到了吃安卓这碗饭并不容易，需要的时大的毅力和不断学习的精神，安卓被定义为前端，但又不仅仅是前端，因为系统的缘故安卓的碎片化非常严重，大量的适配工作常常让开发者浪费大量的时间，这不仅仅有系统的原因也有各大厂商自己或硬件或软件的支持，所以作为一个安卓开发，入门很简单但是要做好做精很难，一个好的安卓开发要撸的起应用层，玩的转系统层，看的了源码，还要应付产品和后端的各种奇葩要求。总之一个好的安卓只要能坚持下来，绝对是一个大神级别的人，值得我等膜拜（有点跑偏--！）

说了这多安卓，只是我对现在做的职业的一点点吐槽，我的安卓没有那些大神这么厉害，安卓有个分水岭，freamwork层，喜欢的人会研究这些源码，其他像我，就只能拓展下技能栈去学习点别的东西了，我个人对后端有点接触，所以乘着空闲来学习下最近很火的框架srpingboot，也就是ssm的简化版。每天学习我都会写个日记算是对自己的学习历程一个记录。

既然是写给自己看的，我就不介绍springboot了，它的好处就是不用像ssm一样去配置一大推东西，遵从了“习惯大于配置”的箴言，对于入门来说容易了很多，但是深入还是要知道原理，先放一个创建springboot的过程。我用的idea（因为像AndroidStudio>-<）。

第一步：

 

 

 

第二步：sql要选,web要选，redis和mybaits自己去加配置

 

 

 

 

 

 

 

 

然后项目大概就是这个样子

项目主要时配置也就是application.yml文件和pom文件（相当于安卓的gradle）

spring:
  datasource:
    url: jdbc:mysql://127.0.0.1:3306/mytest?autoReconnect=true&useUnicode=true&characterEncoding=utf8&useSSL=false
    username: root
    password: root
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    initialSize: 5
    minIdle: 5
    maxActive: 30
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 'x'
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    maxPoolPreparedStatementPerConnectionSize: 20
    filters: stat,wall,slf4j
  mvc:
    throw-exception-if-no-handler-found: true
  resources:
    add-mappings: false
server:
  port: 8082

mybatis-plus:
  mapper-locations: classpath:mapper/*Mapper.xml
  type-aliases-package: com.supermarket.api.entity

profiles:
  url: http://127.0.0.1:8080
  time: 100

<?xml version="1.0" encoding="UTF-8"?>
<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.byavs</groupId>
    <artifactId>byavs-api</artifactId>
    <packaging>war</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.20</version>
        </dependency>

        <!-- 数据库相关 -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatisplus-spring-boot-starter</artifactId>
            <version>1.0.5</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>2.1.7</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.6</version>
        </dependency>

        <!-- commons start -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.20</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.10</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.5</version>
        </dependency>
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.9.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.3</version>
        </dependency>
        <dependency>
            <groupId>org.bouncycastle</groupId>
            <artifactId>bcprov-jdk15on</artifactId>
            <version>1.58</version>
        </dependency>
        <dependency>
            <groupId>org.apache.shiro</groupId>
            <artifactId>shiro-spring</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>com.auth0</groupId>
            <artifactId>java-jwt</artifactId>
            <version>2.2.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-servlet-api</artifactId>
            <version>8.0.39</version>
            <scope>provided</scope>
        </dependency>
        <!-- 模板引擎 -->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>2.0</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- Spring Boot log4j依赖 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j</artifactId>
            <version>1.3.8.RELEASE</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--retrofit-->
        <dependency>
            <groupId>com.squareup.retrofit2</groupId>
            <artifactId>retrofit</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.squareup.okhttp3</groupId>
            <artifactId>okhttp</artifactId>
            <version>3.6.0</version>
        </dependency>
        <dependency>
            <groupId>com.squareup.retrofit2</groupId>
            <artifactId>converter-gson</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.squareup.retrofit2</groupId>
            <artifactId>adapter-rxjava</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
            <exclusion>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-tomcat</artifactId>
            </exclusion>
        </exclusions>
        </dependency>
        <!-- 热部署,不用重启容器 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>springloaded</artifactId>
            <version>1.2.6.RELEASE</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <!-- 解决控制台中文乱码 -->
                    <jvmArguments>-Dfile.encoding=UTF-8</jvmArguments>
                    <mainClass>com.byavs.api.DemoApplication</mainClass>
                </configuration>
                <dependencies>
                </dependencies>
            </plugin>

        </plugins>
    </build>


</project>

配好这两个文件就成功了一半了，剩下的就是编写逻辑代码。。