我们不会去使用自增长的id,在现阶段的互联网开发过程中,自增长的id是已经不适用了。在未来随着系统版本的迭代,用户数量的递增,肯定会做分库分表,去做一些相应的切分。在这个时候我们就需要有一个唯一的id。项目里面会有一个唯一id的插件去使用。所有的主键id都会使用一个字符串varchar。小头像是预览过程中会使用到的。聊天页面使用的是小头像。qrcode是扫码的。cid是client id,它是针对我们每一台手机设备,每一台手机设备都会有一个唯一的cid,这个cid可以通过plus(设备的H5+)相应的API去获取,获取之后cid会用于做消息的推送。
users是用户表,还有一个用户请求表friends_request。
my_friends表。用户和朋友之间会有一个关联关系。通过好友的时候,my_friends表是插入两条记录,因为我的朋友和我自己是可以有一个逆向的。
聊天记录表chat_msg。任何的聊天记录在服务端都会保存的。sign_flag是签收的状态。我发送消息给我的朋友,我的朋友收到消息之后他没有去读,这个时候他的状态其实是未读。如果说他的用户接收之后,他可以自动地再发送一条签收的状态到我们的服务端,就可以证明我们当前这条消息是签收了。这个我们在netty里面我们会去做,我们会做签收的状态的更改的相应的代码实现。
一个真正的聊天软件,一个IM软件的话,其实它肯定是不止这四张表的。因为使用的是mybatis,把所有的数据库表逆向生成实体类pojo。pom.xml里面其实是包含了mybatis以及是数据源一些相应的依赖,另外mybatis逆向生成的工具的依赖。
https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-log4j/1.3.8.RELEASE
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-log4j --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-log4j</artifactId> <version>1.3.8.RELEASE</version> </dependency>
https://mvnrepository.com/artifact/com.alibaba/druid/1.1.10
<!-- https://mvnrepository.com/artifact/com.alibaba/druid --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.10</version> </dependency>
https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter/1.1.10
<!-- https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency>
https://mvnrepository.com/artifact/mysql/mysql-connector-java/5.1.14
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.14</version> </dependency>
https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter/1.3.1
<!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.1</version> </dependency>
https://mvnrepository.com/artifact/tk.mybatis/mapper-spring-boot-starter/1.2.4
<!-- https://mvnrepository.com/artifact/tk.mybatis/mapper-spring-boot-starter --> <dependency> <groupId>tk.mybatis</groupId> <artifactId>mapper-spring-boot-starter</artifactId> <version>1.2.4</version> </dependency>
https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper-spring-boot-starter/1.2.3
<!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper-spring-boot-starter --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.3</version> </dependency>
https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core/1.3.2
<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core --> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.2</version> </dependency>
pom.xml
<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.imooc</groupId> <artifactId>imooc-muxin-mybatis</artifactId> <version>0.0.1-SNAPSHOT</version> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <!-- 引入log4j日志依赖 --> <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-log4j --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-log4j</artifactId> <version>1.3.8.RELEASE</version> </dependency> <!-- 阿里开源数据源 --> <!-- https://mvnrepository.com/artifact/com.alibaba/druid --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.10</version> </dependency> <!-- https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency> <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.14</version> </dependency> <!-- mybatis --> <!-- https://mvnrepository.com/artifact/org.mybatis.spring.boot/mybatis-spring-boot-starter --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.1</version> </dependency> <!-- mapper --> <!-- https://mvnrepository.com/artifact/tk.mybatis/mapper-spring-boot-starter --> <dependency> <groupId>tk.mybatis</groupId> <artifactId>mapper-spring-boot-starter</artifactId> <version>1.2.4</version> </dependency> <!-- pagehelper --> <!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper-spring-boot-starter --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.3</version> </dependency> <!-- mybatis 逆向生成工具 --> <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core --> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.2</version> </dependency> </dependencies> </project>
generatorConfig.xml是用于生成相应的配置。http://www.mybatis.org/generator/configreference/xmlconfig.html
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <classPathEntry location="/Program Files/IBM/SQLLIB/java/db2java.zip" /> <context id="DB2Tables" targetRuntime="MyBatis3"> <jdbcConnection driverClass="COM.ibm.db2.jdbc.app.DB2Driver" connectionURL="jdbc:db2:TEST" userId="db2admin" password="db2admin"> </jdbcConnection> <javaTypeResolver > <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <javaModelGenerator targetPackage="test.model" targetProject="MBGTestProjectsrc"> <property name="enableSubPackages" value="true" /> <property name="trimStrings" value="true" /> </javaModelGenerator> <sqlMapGenerator targetPackage="test.xml" targetProject="MBGTestProjectsrc"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <javaClientGenerator type="XMLMAPPER" targetPackage="test.dao" targetProject="MBGTestProjectsrc"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <table schema="DB2ADMIN" tableName="ALLTYPES" domainObjectName="Customer" > <property name="useActualColumnNames" value="true"/> <generatedKey column="ID" sqlStatement="DB2" identity="true" /> <columnOverride column="DATE_FIELD" property="startDate" /> <ignoreColumn column="FRED" /> <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> </table> </context> </generatorConfiguration>
/imooc-muxin-mybatis/src/main/java/com/imooc/utils/MyMapper.java
package com.imooc.utils; import tk.mybatis.mapper.common.Mapper; import tk.mybatis.mapper.common.MySqlMapper; /** * Copyright © 2018Nathan.Lee.Salvatore. All rights reserved. * * @Title: MyMapper.java * @Prject: imooc-muxin-mybatis * @Package: * @Description: TODO * @author: ZHONGZHENHUA * @date: 2018年11月21日 下午6:47:29 * @version: V1.0 */ /** * 继承自己的MyMapper * * @author ZHONGZHENHUA * @since 2018-11-21 18:48 */ public interface MyMapper<T> extends Mapper<T>,MySqlMapper<T> { //TODO //FIXME 特别注意,该接口不能被扫描到,否则会出错 }
/imooc-muxin-mybatis/generatorConfig.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <context id="MySqlTables" targetRuntime="MyBatis3"> <!-- 处理sql中的`符号 --> <property name="beginningDelimiter" value="`"/> <property name="endingDelimiter" value="`"/> <!-- 添加自定义的继承接口 --> <plugin type="tk.mybatis.mapper.generator.MapperPlugin"> <property name="mappers" value="com.imooc.utils.MyMapper"/> </plugin> <!-- 数据源配置 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/muxin-dev" userId="root" password="root"> </jdbcConnection> <!-- 对于生成的pojo所在包 --> <javaModelGenerator targetPackage="com.imooc.pojo" targetProject="src/main/java"> </javaModelGenerator> <!-- 对于生成的mapper所在目录 --> <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"> </sqlMapGenerator> <!-- 配置mapper对应的java映射 --> <javaClientGenerator type="XMLMAPPER" targetPackage="com.imooc.mapper" targetProject="src/main/java"> </javaClientGenerator> <table tableName="chat_msg"></table> <table tableName="friends_request"></table> <table tableName="my_friends"></table> <table tableName="users"></table> </context>
/imooc-muxin-mybatis/src/main/java/com/imooc/mybatis/utils/GeneratorDisplay.java
package com.imooc.mybatis.utils; import java.io.File; import java.util.ArrayList; import java.util.List; import org.mybatis.generator.api.MyBatisGenerator; import org.mybatis.generator.config.Configuration; import org.mybatis.generator.config.xml.ConfigurationParser; import org.mybatis.generator.internal.DefaultShellCallback; public class GeneratorDisplay { public void generator() throws Exception{ List<String> warnings = new ArrayList<String>(); boolean overwrite = true; //指定 逆向工程配置文件 File configFile = new File("generatorConfig.xml"); ConfigurationParser cp = new ConfigurationParser(warnings); Configuration config = cp.parseConfiguration(configFile); DefaultShellCallback callback = new DefaultShellCallback(overwrite); MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings); myBatisGenerator.generate(null); } public static void main(String[] args) { try { GeneratorDisplay generatorSqlmap = new GeneratorDisplay(); generatorSqlmap.generator(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
修改/imooc-muxin-mybatis/generatorConfig.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <context id="MySqlContext" targetRuntime="MyBatis3Simple" defaultModelType="flat"> <!-- 处理sql中的`符号 --> <property name="beginningDelimiter" value="`"/> <property name="endingDelimiter" value="`"/> <!-- 添加自定义的继承接口 --> <plugin type="tk.mybatis.mapper.generator.MapperPlugin"> <property name="mappers" value="com.imooc.utils.MyMapper"/> </plugin> <!-- 数据源配置 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/muxin-dev" userId="root" password="root"> </jdbcConnection> <!-- 对于生成的pojo所在包 --> <javaModelGenerator targetPackage="com.imooc.pojo" targetProject="src/main/java"> </javaModelGenerator> <!-- 对于生成的mapper所在目录 --> <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"> </sqlMapGenerator> <!-- 配置mapper对应的java映射 --> <javaClientGenerator type="XMLMAPPER" targetPackage="com.imooc.mapper" targetProject="src/main/java"> </javaClientGenerator> <table tableName="chat_msg"></table> <table tableName="friends_request"></table> <table tableName="my_friends"></table> <table tableName="users"></table> </context> </generatorConfiguration>
做开发的时候,数据库表可能一直会去做相应的更改。这一节就是对mybatis做一个逆向生成。接下来需要搭建架构,把工程进行初始化,在里面做相应的开发。框架会使用SpringBoot2.0。https://spring.io/projects/spring-boot#learn,目前SpringBoot最稳定的版本是2.1.0。
接下来创建项目工程。Group Id是组织名,Artifact Id 是项目名称,一般会加上企业的名字-产品名-基本的技术。
parent参考https://docs.spring.io/spring-boot/docs/2.1.0.RELEASE/reference/htmlsingle/,
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.0.RELEASE</version> </parent>
propertis是指java的版本,另外Encoding就是字符集的设置,UTF-8,JDK是1.8,参考https://maven.apache.org/pom.html
<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参考https://docs.spring.io/spring-boot/docs/2.1.0.RELEASE/reference/htmlsingle/,
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency> </dependencies>
这三个是SpringBoot基本的依赖。下面三个是apache的工具类。
<!-- apache工具类 --> <!-- https://mvnrepository.com/artifact/commons-codec/commons-codec --> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.11</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.4</version> </dependency> <!-- https://mvnrepository.com/artifact/commons-io/commons-io --> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>1.3.2</version> </dependency>
pom工程有了,接下来就需要有启动类/imooc-muxin-netty/src/main/java/com/imooc/Application.java
package com.imooc; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.ComponentScan; @SpringBootApplication // 扫描 所有需要的包, 包含一些自用的工具类包 所在的路径 @ComponentScan(basePackages= {"com.imooc"}) public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
还需要一个application.properties/application.yml。
#关闭缓存, 即时刷新 #spring.freemarker.cache=false spring.thymeleaf.cache=true #热部署生效 spring.devtools.restart.enabled=true #设置重启的目录,添加那个目录的文件需要restart spring.devtools.restart.additional-paths=src/main/java # 为mybatis设置,生产环境可删除 restart.include.mapper=/mapper-[\w-\.]+jar restart.include.pagehelper=/pagehelper-[\w-\.]+jar #排除那个目录的文件不需要restart #spring.devtools.restart.exclude=static/**,public/** #classpath目录下的WEB-INF文件夹内容修改不重启 ########################################### # # 配置日志相关 # ########################################### # 系统默认info级别, 切换为debug则设置为true #debug=false # 设置某个包下的日志级别, 如下则打印所有 com.leecx.controller 这个包下的debug的日志 #logging.level.com.leecx.controllere=DEBUG #logging.level.com.leecx.service=WARN ########################################## # # 配置数据源相关 使用阿里巴巴的druid 数据源 # ########################################## spring.datasource.url=jdbc:mysql://localhost:3306/leecx spring.datasource.username=root spring.datasource.password=root spring.datasource.driver-class-name=com.mysql.jdbc.Drivers spring.datasource.druid.initial-size=1 spring.datasource.druid.min-idle=1 spring.datasource.druid.max-active=20 spring.datasource.druid.test-on-borrow=true spring.datasource.druid.stat-view-servlet.allow=true ############################################ # # mybatis 配置 # ############################################ # mybatis 配置 mybatis.type-aliases-package=com.leecx.pojo mybatis.mapper-locations=classpath:mapper/*.xml # 通用Mapper 配置 mapper.mappers=com.imooc.utils.MyMapper mapper.not-empty=false mapper.identity=MYSQL # 分页插件配置 pagehelper.helperDialect=mysql pagehelper.reasonable=true pagehelper.supportMethodsArguments=true pagehelper.params=count=countSql ########################################## # # REDIS 配置 # ########################################## # Redis数据库索引(默认为0) spring.redis.database=1 # Redis服务器地址 spring.redis.host=192.168.1.191 # Redis服务器连接端口 spring.redis.port=6379 # Redis服务器连接密码(默认为空) spring.redis.password= # 连接池最大连接数(使用负值表示没有限制) spring.redis.jedis.pool.max-active=1000 # 连接池最大阻塞等待时间(使用负值表示没有限制) spring.redis.jedis.pool.max-wait=-1 # 连接池中的最大空闲连接 spring.redis.jedis.pool.max-idle=10 # 连接池中的最小空闲连接 spring.redis.timeout=0 ########################################## # # 配置i18n 资源文件, 供thymeleaf 读取 # ########################################## spring.messages.basename=i18n/messages #spring.messages.cache-seconds=3600 spring.messages.encoding=UTF-8 #设定静态文件路径,js,css等 spring.mvc.static-path-pattern=/static/** ######################################### # # freemarker 静态资源配置 # ######################################### #设定ftl文件路径 spring.freemarker.template-loader-path=classpath:/templates # 关闭缓存, 即时刷新, 上线生产环境需要改为true spring.freemarker.cache=false spring.freemarker.charset=UTF-8 spring.freemarker.check-template-location=true spring.freemarker.content-type=text/html spring.freemarker.expose-request-attributes=true spring.freemarker.expose-session-attributes=true spring.freemarker.request-context-attribute=request spring.freemarker.suffix=.ftl ################################################### # # thymeleaf 静态资源配置 # # ################################################### spring.thymeleaf.prefix=classpath:/templates/ spring.thymeleaf.suffix=.html spring.thymeleaf.mode=HTML5 spring.thymeleaf.encoding=UTF-8 spring.thymeleaf.servlet.content-type=text/html # 关闭缓存, 即时刷新, 上线生产环境需要改为true #spring.thymeleaf.cache=false ######################################## # # Server 服务端相关配置 # ######################################## # 配置api端口号 #server.port=8088 server.port=8080 # 配置context-path, 一般来说这个配置在正式发布的时候不配置 #server.context-path=/LeeCX # 错误页,指定发生错误时,跳转的URL --> BasicErrorController #server.error.path=/error # session最大超时时间(分钟),默认为30分钟 server.servlet.session.timeout=60 # 该服务绑定IP地址,启动服务器时如本机不是该IP地址则抛出异常启动失败, 只有特殊需求的情况下才配置, #server.address=192.168.1.8 ########################################### # Server - tomcat 相关常用配置 ########################################### # tomcat最大线程数, 默认为200 #server.tomcat.max-threads=250 # tomcat的URI编码 server.tomcat.uri-encoding=UTF-8 # 存放Tomcat的日志、Dump等文件的临时文件夹,默认为系统的tmp文件夹(如:C:UsersHONGZHENHUAAppData #server.tomcat.basedir=H:/springboot-tomcat-tmp # 打开Tomcat的Access日志,并可以设置日志格式的方法: #server.tomcat.access-log-enabled=true #server.tomcat.access-log-pattern= # accesslog目录,默认在basedir/logs #server.tomcat.accesslog.directory= # 日志文件目录 #logging.path=H:/springboot-tomcat-tmp # 日志文件名称,默认为spring.log #logging.file=myapp.log
删去没用的内容,application.properties为:
######################################## # # Server 服务端相关配置 # ######################################## # 配置api端口号 #server.port=8088 server.port=8080 ########################################### # Server - tomcat 相关常用配置 ########################################### # tomcat的URI编码 server.tomcat.uri-encoding=UTF-8
现在基本的配置都已经是有了,有了之后我们来创建一个HelloController,来做一个测试看一下我们的SpringBoot有没有搭建成功。由于我们的项目一开始刚刚初始化,Problems会有一个问题。
右键Maven,Update project。