springBoot-mybatis逆向工程
Javaweb开发之-mybatis逆向工程
- springBoot+mybatis逆向工程
- springBoot+mybatis逆向工程——错误注意1
- springBoot+mybatis逆向工程——错误注意2
- springBoot+mybatis逆向工程——错误注意3
springBoot+mybatis逆向工程
Intellij IDEA为例，先创建springboot工程。 然后添加如下所示的依赖。
- pom.xml文件 ：
任何一个maven项目启动的时候，第一步首先去遍历加载pom.xml文件，
首先是标签内容，（常见错误–>错误注意1）
其次是标签内容，（常见错误–>错误注意2）
再次是挂载的标签的内容，位于标签内；（常见错误–>错误注意3）
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.0.4.RELEASE
com.yiche.points
order-v2
1.0.0
order-v2
车币商城订单服务2.0
UTF-8
UTF-8
1.8
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.0
org.mybatis.generator
mybatis-generator-core
1.3.2
org.springframework.boot
spring-boot-maven-plugin
org.mybatis.generator
mybatis-generator-maven-plugin
1.3.2
${basedir}/src/main/resources/generatorConfig.xml
true
true
- application.yml文件中配置数据源
spring:
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://192.168.15.115:3306/mall
username: root
password: 123456
server:
port: 8080
- 在resources文件夹下创建generatorConfig.xml文件 ：
- 启动逆向工程生成实体类和mapper文件 ：
使用maven配置生成代码
命令行是mybatis-generator:generate -e
在IntelliJ IDEA中的操作步骤如下：
首先选择Run->Edit Configurations…
然后点击左上角的“+”号，选择Maven
最后在Working directory中填入你项目的根目录，然后在下面的Command line中填入mybatis-generator:generate -e。点击OK即可。
如下图所示：
springBoot+mybatis逆向工程——错误注意1
很多互联网的朋友，在使用maven的构建项目的时候，对Maven的运行机制不了解；
例如：我所构建的项目是一个maven的聚合项目，他的父项目是一个类型为pom项目，不是jar或者war；
这时是不能用generator进行逆向生成的；
代码如下：
4.0.0
com.yiche.points
mobile
1.0.0
com.yiche.points
order-v2
1.0.0
order-v2
车币商城订单服务2.0
UTF-8
UTF-8
1.8
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.0
org.mybatis.generator
mybatis-generator-core
1.3.2
org.springframework.boot
spring-boot-maven-plugin
org.mybatis.generator
mybatis-generator-maven-plugin
1.3.2
${basedir}/src/main/resources/generatorConfig.xml
true
true
这时generator启动报错，报错新如下(哈哈，这时细心的同学就发现内容变了)：
[INFO] Error stacktraces are turned on.
[INFO] Scanning for projects...
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[FATAL] Non-resolvable parent POM for com.yiche.points:order-v2:1.0.0: Failure to find com.yiche.points:mobile:pom:1.0.0 in http://maven.bitautotech.com/repository/WP-Public/ was cached in the local repository, resolution will not be reattempted until the update interval of yiche-wp-public has elapsed or updates are forced and 'parent.relativePath' points at no local POM @ line 5, column 13
@
[ERROR] The build could not read 1 project -> [Help 1]
org.apache.maven.project.ProjectBuildingException: Some problems were encountered while processing the POMs:
[FATAL] Non-resolvable parent POM for com.yiche.points:order-v2:1.0.0: Failure to find com.yiche.points:mobile:pom:1.0.0 in http://maven.bitautotech.com/repository/WP-Public/ was cached in the local repository, resolution will not be reattempted until the update interval of yiche-wp-public has elapsed or updates are forced and 'parent.relativePath' points at no local POM @ line 5, column 13
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:422)
at org.apache.maven.graph.DefaultGraphBuilder.collectProjects(DefaultGraphBuilder.java:419)
at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor(DefaultGraphBuilder.java:410)
at org.apache.maven.graph.DefaultGraphBuilder.build(DefaultGraphBuilder.java:83)
at org.apache.maven.DefaultMaven.buildGraph(DefaultMaven.java:491)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:219)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
at org.codehaus.classworlds.Launcher.main(Launcher.java:47)
[ERROR]
[ERROR] The project com.yiche.points:order-v2:1.0.0 (/Users/liyang9/IdeaProjects/points-mobile/order-v2/pom.xml) has 1 error
[ERROR] Non-resolvable parent POM for com.yiche.points:order-v2:1.0.0: Failure to find com.yiche.points:mobile:pom:1.0.0 in http://maven.bitautotech.com/repository/WP-Public/ was cached in the local repository, resolution will not be reattempted until the update interval of yiche-wp-public has elapsed or updates are forced and 'parent.relativePath' points at no local POM @ line 5, column 13 -> [Help 2]
org.apache.maven.model.resolution.UnresolvableModelException: Failure to find com.yiche.points:mobile:pom:1.0.0 in http://maven.bitautotech.com/repository/WP-Public/ was cached in the local repository, resolution will not be reattempted until the update interval of yiche-wp-public has elapsed or updates are forced
at org.apache.maven.project.ProjectModelResolver.resolveModel(ProjectModelResolver.java:197)
at org.apache.maven.project.ProjectModelResolver.resolveModel(ProjectModelResolver.java:246)
at org.apache.maven.model.building.DefaultModelBuilder.readParentExternally(DefaultModelBuilder.java:1000)
at org.apache.maven.model.building.DefaultModelBuilder.readParent(DefaultModelBuilder.java:800)
at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:329)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:469)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:438)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:401)
at org.apache.maven.graph.DefaultGraphBuilder.collectProjects(DefaultGraphBuilder.java:419)
at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor(DefaultGraphBuilder.java:410)
at org.apache.maven.graph.DefaultGraphBuilder.build(DefaultGraphBuilder.java:83)
at org.apache.maven.DefaultMaven.buildGraph(DefaultMaven.java:491)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:219)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
at org.codehaus.classworlds.Launcher.main(Launcher.java:47)
Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: Failure to find com.yiche.points:mobile:pom:1.0.0 in http://maven.bitautotech.com/repository/WP-Public/ was cached in the local repository, resolution will not be reattempted until the update interval of yiche-wp-public has elapsed or updates are forced
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:444)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:246)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:223)
at org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveArtifact(DefaultRepositorySystem.java:294)
at org.apache.maven.project.ProjectModelResolver.resolveModel(ProjectModelResolver.java:193)
... 26 more
Caused by: org.eclipse.aether.transfer.ArtifactNotFoundException: Failure to find com.yiche.points:mobile:pom:1.0.0 in http://maven.bitautotech.com/repository/WP-Public/ was cached in the local repository, resolution will not be reattempted until the update interval of yiche-wp-public has elapsed or updates are forced
at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.newException(DefaultUpdateCheckManager.java:231)
at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.checkArtifact(DefaultUpdateCheckManager.java:206)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.gatherDownloads(DefaultArtifactResolver.java:585)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:503)
at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:421)
... 30 more
[ERROR]
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
[ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException
解决办法：
把下面这段代码，
org.springframework.boot
spring-boot-starter-parent
2.0.4.RELEASE
去替换掉parent标签的内容，等pojo和mapper生产完毕后，再把原来parent标签的内容换回来；
springBoot+mybatis逆向工程——错误注意2
一定要确保你标签的jar都是存在的，可应用的；
意思就是：
譬如，我们总习惯在工程中把版本号统一定义在父工程的pom.xml文件中，
这时，在子工程中，会因为缺少版本号，而报错，报jar找不到；
所以，一定要确保内的jar文件都可以从maven仓库down下来；
springBoot+mybatis逆向工程——错误注意3
同理，标签下的标签，也一样要确保你的挂载是存在的，可以down下来；
除此之外，还要确保一点，标签不要和父工程的pom.xml的标签冲突，如果你的父pom文件有挂载，这时你的generator逆向工程也是会失败的；
错误代码如下：
父工程（mobile）的pom.xml文件：
4.0.0
com.yiche.points
mobile
1.0.0
product-api
order-api
order-rabbit-receiver
mall-h5
order-v2
product-v2
payment-api
pom
mobile
points h5 website.
org.springframework.boot
spring-boot-starter-parent
1.5.10.RELEASE
UTF-8
UTF-8
1.8
1.8
1.8
true
Edgware.SR2
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-actuator
org.springframework.cloud
spring-cloud-starter-eureka
org.springframework.cloud
spring-cloud-starter-config
org.springframework.cloud
spring-cloud-starter-feign
org.springframework.cloud
spring-cloud-starter-sleuth
org.springframework.cloud
spring-cloud-sleuth-stream
org.springframework.cloud
spring-cloud-starter-stream-rabbit
org.springframework.cloud
spring-cloud-starter-bus-amqp
org.springframework.boot
spring-boot-starter-amqp
org.springframework.boot
spring-boot-starter-jdbc
mysql
mysql-connector-java
runtime
com.alibaba
fastjson
1.2.41
com.alibaba
druid
1.0.29
com.fasterxml.jackson.core
jackson-databind
2.8.10
org.springframework.boot
spring-boot-starter-test
test
com.yiche
micro-common
3.0.0
ch.qos.logback
logback-classic
1.2.3
net.logstash.logback
logstash-logback-encoder
5.2
com.yiche.points
utils
1.0.0
org.apache.commons
commons-lang3
3.7
com.fasterxml.jackson.core
jackson-annotations
2.8.4
org.hibernate
hibernate-validator
org.springframework.boot
spring-boot-autoconfigure
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.0
io.swagger
swagger-annotations
1.5.3
org.springframework.cloud
spring-cloud-dependencies
${spring-cloud.version}
pom
import
yiche-wp
yiche-wp
http://maven.bitautotech.com/repository/WP/
yiche-wp-snapshots
yiche-wp-snapshots
http://maven.bitautotech.com/repository/WP/
org.mybatis.generator
mybatis-generator-maven-plugin
1.3.2
${basedir}/src/main/resources/generator/generatorConfig.xml
true
true
org.springframework.boot
spring-boot-maven-plugin
这种挂载方式理想情况下，是对所有子项目都有效的；但是逆向工程的时候，会报你的generator挂载找不到；
正确的挂载方式，是挂载在子项目的pom.xml文件中！
此时，还要注意！如果你的父工程中有内容，一定要先注释掉；不然你子项目的挂载的mybatis-generator一样不会生效！