maven聚合工程整合springboot+mybatisplus遇到的问题

前言（可以直接跳过看下面解决方法）

项目结构

两个module：

yema-terminal-boot 是springboot项目，子包有：controller、service、dao 等等。属于经典三层架构。那么，该module可以理解为是一个单体项目，采用MVC软件设计模式+三层体系的编程思想构建而成

yema-common 的作用，就是存放一些公用的资源，任何公用的都放这里，除了常用自定义工具类，还包括接口！然后该module的pom.xml文件中定义了整个项目所需要的依赖jar包。这样做，yema-terminal-boot 的pom.xml中只需要依赖 yema-common 即可。

为什么这样设计两个module？

也许，市面上的Maven聚合工程，挺多人是这样弄的，比如：

yema-terminal-boot

yema-service

yema-dao

yema-common

这样也可以，就是有个问题。当我再次新建一个module作为另一个单体项目时，那么这个单体项目的业务层和持久层，都得写yema-service、yema-dao 中。当业务多了，项目经手的程序员多了，可能会出现乱调用现象。就是说yema-service 中的某个接口，其实是只服务于其中一个单体项目，另一个单体项目是不能用的。但是却调用了，虽然功能也实现了，但给以后埋下了个地雷。

而我目前这种只用两个module，就是为了强制规范。是这个项目的就这个项目里写，不要偷懒去复用。虽然工作量多了点，但以后排查与修改问题就好很多。（我就接手了这种项目，生产支付调用问题，发现多个springboot启动类调用到，头皮发麻，改一下，要测试多个项目）

整合

父pom.xml


"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>4.0.0modelVersion>
 
    <groupId>com.yemagroupId>
    <artifactId>YMRootartifactId>
    <version>1.0-SNAPSHOTversion>
    <packaging>pompackaging>
 
    <modules>
        <module>yema-commonmodule>
        <module>yema-terminal-bootmodule>
    modules>
 
    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <maven.compiler.source>8maven.compiler.source>
        <maven.compiler.target>8maven.compiler.target>
    properties>
 
    
    <parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>2.3.4.RELEASEversion>
        <relativePath/> 
    parent>
 
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.yemagroupId>
                <artifactId>yema-commonartifactId>
                <version>1.0-SNAPSHOTversion>
            dependency>
        dependencies>
    dependencyManagement>
 
project>

yema-terminal-boot的pom.xml


"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">
    <parent>
        <artifactId>YMRootartifactId>
        <groupId>com.yemagroupId>
        <version>1.0-SNAPSHOTversion>
    parent>
    <modelVersion>4.0.0modelVersion>
 
    <artifactId>yema-terminal-bootartifactId>
 
    <dependencies>
        <dependency>
            <groupId>com.yemagroupId>
            <artifactId>yema-commonartifactId>
        dependency>
    dependencies>
 
    <build>
        <finalName>ym-terminal-bootfinalName>
        <plugins>
            <plugin>
                
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>
        plugins>
    build>
project>

yema-terminal-boot的resources下的log4j2.xml

注意：需要在yml中配置。成功后，日志保存在该项目所在磁盘根目录下，实在找不到，全局搜XLogs目录

#配置日志
logging.level.com.yema: info
logging.config: classpath:log4j2.xml
logging.file.encoding: UTF-8


"1.0" encoding="UTF-8"?>
 
<configuration status="DEBUG" monitorinterval="60">
    
    <Properties>
        
        
        
        
        <property name="LOG_PATTERN" value="%date{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36}(%F:%L) - %msg%n" />
        
        <property name="LOG_FILE_PATH" value="/XLogs/terminal" />
        <property name="FILE_NAME" value="terminalFile" />
    Properties>
 
    
    <Appenders>
 
        
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="${LOG_PATTERN}"/>  
        Console>
 
 
        
        <File name="XLogs" fileName="${LOG_FILE_PATH}/xlogs.log"  append="false">
            <PatternLayout pattern="${LOG_PATTERN}"/>   
            
            <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
        File>
 
 
        
 
        
        <RollingFile name="RollingFileInfo" fileName="${LOG_FILE_PATH}/info.log" filePattern="${LOG_FILE_PATH}/logs/${FILE_NAME}-INFO-%d{yyyy-MM-dd}_%i.log.zip">
            
            <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="${LOG_PATTERN}"/>
            <Policies>
                
                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>
                <SizeBasedTriggeringPolicy size="10MB"/>
            Policies>
            
            <DefaultRolloverStrategy max="15"/>
        RollingFile>
 
        
        <RollingFile name="RollingFileWarn" fileName="${LOG_FILE_PATH}/warn.log" filePattern="${LOG_FILE_PATH}/logs/${FILE_NAME}-WARN-%d{yyyy-MM-dd}_%i.log.zip">
            
            <ThresholdFilter level="warn" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="${LOG_PATTERN}"/>
            <Policies>
                
                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>
                <SizeBasedTriggeringPolicy size="10MB"/>
            Policies>
            
            <DefaultRolloverStrategy max="15"/>
        RollingFile>
 
        
        <RollingFile name="RollingFileError" fileName="${LOG_FILE_PATH}/error.log" filePattern="${LOG_FILE_PATH}/logs/${FILE_NAME}-ERROR-%d{yyyy-MM-dd}_%i.log.zip">
            
            <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
            <PatternLayout pattern="${LOG_PATTERN}"/>
            <Policies>
                
                <TimeBasedTriggeringPolicy modulate="true" interval="1"/>
                <SizeBasedTriggeringPolicy size="10MB"/>
            Policies>
            
            <DefaultRolloverStrategy max="15"/>
        RollingFile>
 
    Appenders>
 
 
    
 
 
 
 
    
 
    
    
    <loggers>
 
        
        <Logger name="org.springframework" level="info" additivity="false">
            <AppenderRef ref="Console"/>
        Logger>
        <logger name="com.spring" level="INFO"/>
        <logger name="org.mybatis" level="info" additivity="false">
            <AppenderRef ref="Console"/>
        logger>
 
        <root level="info">
            <appender-ref ref="Console"/>
            <appender-ref ref="XLogs"/>
            <appender-ref ref="RollingFileInfo"/>
            <appender-ref ref="RollingFileWarn"/>
            <appender-ref ref="RollingFileError"/>
        root>
    loggers>
 
configuration>

yema-common的pom.xml


"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">
    <parent>
        <artifactId>YMRootartifactId>
        <groupId>com.yemagroupId>
        <version>1.0-SNAPSHOTversion>
    parent>
    <modelVersion>4.0.0modelVersion>
 
    <artifactId>yema-commonartifactId>
 
    <properties>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <maven.compiler.source>8maven.compiler.source>
        <maven.compiler.target>8maven.compiler.target>
    properties>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.bootgroupId>
                    <artifactId>spring-boot-starter-loggingartifactId>
                exclusion>
            exclusions>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-thymeleafartifactId>
        dependency>
        
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-log4j2artifactId>
        dependency>
        
        <dependency>
            <groupId>com.microsoft.sqlservergroupId>
            <artifactId>mssql-jdbcartifactId>
            <scope>runtimescope>
        dependency>
        
        <dependency>
            <groupId>org.projectlombokgroupId>
            <artifactId>lombokartifactId>
        dependency>
        
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>fastjsonartifactId>
            <version>1.2.73version>
        dependency>
        
        <dependency>
            <groupId>org.apache.commonsgroupId>
            <artifactId>commons-lang3artifactId>
        dependency>
        
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>druidartifactId>
            <version>1.2.8version>
        dependency>
        <dependency>
            <groupId>org.slf4jgroupId>
            <artifactId>slf4j-log4j12artifactId>
        dependency>
        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>8.0.25version>
        dependency>
        
        <dependency>
            <groupId>com.baomidougroupId>
            <artifactId>mybatis-plus-boot-starterartifactId>
            <version>3.3.2version>
        dependency>
        
        <dependency>
            <groupId>com.baomidougroupId>
            <artifactId>mybatis-plus-extensionartifactId>
            <version>3.4.2version>
        dependency>
        
 
        
        <dependency>
            <groupId>io.jsonwebtokengroupId>
            <artifactId>jjwt-apiartifactId>
            <version>0.11.5version>
        dependency>
        <dependency>
            <groupId>io.jsonwebtokengroupId>
            <artifactId>jjwt-implartifactId>
            <version>0.11.5version>
            <scope>runtimescope>
        dependency>
        <dependency>
            <groupId>io.jsonwebtokengroupId>
            <artifactId>jjwt-jacksonartifactId>
            <version>0.11.5version>
            <scope>runtimescope>
        dependency>
        
 
        
        <dependency>
            <groupId>org.apache.httpcomponentsgroupId>
            <artifactId>httpclientartifactId>
            <version>4.5.13version> 
        dependency>
        <dependency>
            <groupId>org.apache.httpcomponents.client5groupId>
            <artifactId>httpclient5artifactId>
            <version>5.2.3version>
        dependency>
        
        
        <dependency>
            <groupId>com.sun.jerseygroupId>
            <artifactId>jersey-clientartifactId>
            <version>1.19.4version>
        dependency>
 
        <dependency>
            <groupId>commons-iogroupId>
            <artifactId>commons-ioartifactId>
            <version>2.11.0version>
        dependency>
 
        <dependency>
            <groupId>net.coobirdgroupId>
            <artifactId>thumbnailatorartifactId>
            <version>0.4.8version>
        dependency>
 
        
        <dependency>
            <groupId>com.baidu.aipgroupId>
            <artifactId>java-sdkartifactId>
            <version>4.12.0version>
        dependency>
 
    dependencies>
project>

整合遇到的问题

1、Invalid bound statement (not found)

（前提是首先你得排查下注解以及扫描以及mapper.xml中的namespace引用是否正确）

这是没有扫描到对应的mapper.xml。原因是mybatis-plus 3.1.2 版本后，里面已经设置默认扫描位置为：classpath*:mapper/**/*.xml，见配置文件：MybatisPlusProperties

所以在springboot的yml中要配置成


mybatis-plus:
  mapper-locations: classpath*:mapper/*.xml
  type-aliases-package: com.yema
  configuration:
    log-impl: org.apache.ibatis.logging.log4j2.Log4j2Impl #开启sql日志
    #    log-impl: org.apache.ibatis.logging.nologging.NoLoggingImpl #关闭sql日志
    default-enum-type-handler: com.baomidou.mybatisplus.extension.handlers.MybatisEnumTypeHandler
    call-setters-on-nulls: true #设置值为null时字段也返回给前端
    cache-enabled: true #开启缓存
    lazy-loading-enabled: true #开启懒加载
    aggressive-lazy-loading: false #关闭立即加载
    jdbc-type-for-null: null #因为mybatis对所有的null都映射的是原生Jdbc的OTHER类型，oracle不能正确处理，所以修改jdbcTypeForNull的值为null
    map-underscore-to-camel-case: true #开启驼峰转换，就是数据库的字段是student_id 对应 实体类属性 studentId

2、Maven打包后没有没有BOOT-INF等目录

原因是在springboot对应的module（yema-terminal-boot）的pom.xml中缺少


<build>
        <finalName>ym-terminal-bootfinalName>
        <plugins>
            <plugin>
                
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
            plugin>
        plugins>
    build>

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原文地址：https://blog.csdn.net/smile_life_/article/details/139270041