{"id":1503,"date":"2023-03-25T13:54:19","date_gmt":"2023-03-25T05:54:19","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=1503"},"modified":"2023-04-28T20:23:57","modified_gmt":"2023-04-28T12:23:57","slug":"mybatis-generator-custom-plugin-or-extension-reports-cannot-instantiate-object-of-type-xxx","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/03\/25\/mybatis-generator-custom-plugin-or-extension-reports-cannot-instantiate-object-of-type-xxx\/","title":{"rendered":"MyBatis generator\u81ea\u5b9a\u4e49\u63d2\u4ef6\u6216\u8005\u6269\u5c55\u62a5Cannot instantiate object of type XXX"},"content":{"rendered":"

\u9519\u8bef\u8bf4\u660e<\/h2>\n

Mybatis generator\u786e\u5b9e\u597d\u7528\uff0c\u4f46\u662f\u79bb\u6211\u4eec\u7684\u751f\u4ea7\u4ee3\u7801\u8fd8\u662f\u6709\u5dee\u522b\u7684\u3002\u6bd4\u5982\u7f3a\u5c11toString<\/code> hashCode<\/code> equals<\/code>\u7b49\u65b9\u6cd5\uff0c\u6216\u8005\u81ea\u5b9a\u4e49\u7684\u4e00\u4e9b\u6ce8\u91ca\uff0c\u4f5c\u8005\u4fe1\u606f\u7b49\u3002<\/p>\n

\u5b98\u65b9\u6587\u6863\u4e5f\u8bf4\u53ef\u4ee5\u81ea\u5b9a\u4e49\u63d2\u4ef6\uff0c\u4f46\u662f\u5f53\u6211\u4eec\u7ee7\u627f\u6216\u8005\u5b9e\u73b0mybatis-generator<\/code>\u7684\u7c7b\u6216\u8005\u63a5\u53e3\u65f6\uff0c\u8fd0\u884c\u62a5\u9519\uff1a<\/p>\n

<\/p>\n

Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.6:generate (default-cli) on project damon: Execution default-cli of goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.6:generate failed: Cannot instantiate object of type cn.edu.zua.damon.util.MyDefaultCommentGenerator -> [Help 1]\norg.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.6:generate (default-cli) on project damon: Execution default-cli of goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.6:generate failed: Cannot instantiate object of type cn.edu.zua.damon.util.MyDefaultCommentGenerator\n    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:213)\n    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)\n    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)\n    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)\n    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)\n    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:51)\n    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)\n    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:309)\n    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)\n    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)\n    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)\n    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)\n    at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)\n    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)\n    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)\n    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)\n    at java.lang.reflect.Method.invoke (Method.java:498)\n    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)\n    at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)\n    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)\n    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)\n    at org.codehaus.classworlds.Launcher.main (Launcher.java:47)\nCaused by: org.apache.maven.plugin.PluginExecutionException: Execution default-cli of goal org.mybatis.generator:mybatis-generator-maven-plugin:1.3.6:generate failed: Cannot instantiate object of type cn.edu.zua.damon.util.MyDefaultCommentGenerator\n    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:145)\n    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)\n    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)\n    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)\n    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)\n    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)\n    at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:51)\n    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)\n    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:309)\n    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)\n    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)\n    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)\n    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)<\/code><\/pre>\n
\u7ecf\u8fc7\u8010\u5fc3\u7684\u641c\u7d22\u548c\u5bfb\u627e\uff0c\u5927\u81f4\u786e\u5b9a\u4e86\u9519\u8bef\u3002\u9519\u8bef\u5c31\u662fmybatis-generator<\/code>\u7684plugin<\/code>\u6709\u81ea\u5df1\u7684classpath<\/code>\uff0c\u6211\u4eec\u5728\u9879\u76ee\u4e2d\u76f4\u63a5\u7ee7\u627f\u7684\u7c7b\u548cplugin<\/code>\u4e0d\u5c5e\u4e8e\u540c\u4e00\u4e2aclasspath<\/code>\u3002\u8fd9\u4e00\u70b9\u5728\u5b98\u65b9\u6587\u6863\u6709\u4e00\u70b9\u63d0\u5230\uff1ahttp:\/\/mybatis.org\/generator\/running\/runningWithMaven.html<\/a><\/p>\n
\n
Classpath Issues
\nInitially, the plugin classpath is very limited – it only contains MyBatis generator itself. If you need to add something to the plugin’s classpath (for example, a JDBC driver)<\/p>\n<\/blockquote>\n
\u4f46\u662f\u5b98\u65b9\u6587\u6863\u5e76\u6ca1\u6709\u660e\u786e\u8bf4\u660e\uff0c\u5f53\u6211\u4eec\u81ea\u5b9a\u4e49\u7684\u63d2\u4ef6\u8be5\u653e\u5230\u54ea\u91cc\u3002<\/p>\n
\u5230\u8fd9\u91cc\uff0c\u95ee\u9898\u5c31\u89e3\u51b3\u4e86\uff1a\u6211\u4eec\u9700\u8981\u628a\u81ea\u5df1\u5199\u7684\u63d2\u4ef6\u5c01\u88c5\u6210\u4e00\u4e2ajar\uff0c\u6216\u8005\u5b89\u88c5\u5230\u672c\u5730\uff0c\u6216\u8005deploy\u81f3\u9879\u76ee\u4ed3\u5e93\uff0c\u7136\u540e\u5728plugin\u4e2d\u6dfb\u52a0\u4f9d\u8d56<\/strong><\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
\u65b9\u6848\u4e00<\/h3>\n
\u5728plugin\u7684pom\u4e2d\u6dfb\u52a0jar\u4f9d\u8d56\uff1a<\/p>\n
<dependency>\n    <groupId>xxx<\/groupId>\n    <artifactId>xxx<\/artifactId>\n    <version>1.0<\/version>\n    <scope>system<\/scope>\n    <systemPath>F:\/xxx\/lib\/xxx.jar<\/systemPath>\n<\/dependency><\/code><\/pre>\n
\u914d\u7f6e\u793a\u4f8b\uff1a<\/p>\n
<plugin>\n    <groupId>org.mybatis.generator<\/groupId>\n    <artifactId>mybatis-generator-maven-plugin<\/artifactId>\n    <version>1.4.0<\/version>\n    <dependencies>\n        <dependency>\n            <groupId>com.taozipay<\/groupId>\n            <artifactId>union-pay-dao<\/artifactId>\n            <version>1.0.0-SNAPSHOT<\/version>\n            <scope>system<\/scope>\n            <systemPath>E:\/Library\/MavenRepository\/com\/taozipay\/union-pay-dao\/1.0.0-SNAPSHOT\/union-pay-dao-1.0.0-SNAPSHOT.jar<\/systemPath>\n        <\/dependency>\n        <dependency>\n            <groupId>org.mybatis.generator<\/groupId>\n            <artifactId>mybatis-generator-core<\/artifactId>\n            <version>1.4.0<\/version>\n        <\/dependency>\n        <dependency>\n            <groupId>mysql<\/groupId>\n            <artifactId>mysql-connector-java<\/artifactId>\n            <version>8.0.20<\/version>\n        <\/dependency>\n    <\/dependencies>\n    <configuration>\n        <verbose>true<\/verbose>\n        <overwrite>true<\/overwrite>\n        <configurationFile>src\/main\/resources\/generatorConfig.xml<\/configurationFile>\n    <\/configuration>\n<\/plugin><\/code><\/pre>\n
\u65b9\u6848\u4e8c<\/h3>\n
\u5b89\u88c5jar\u5230\u672c\u5730\u4ed3\u5e93\uff1a<\/p>\n
mvn install:install-file -DgroupId=com.taozipay -DartifactId=union-pay-dao -Dversion=1.0.0-SNAPSHOT -Dpackaging=jar -Dfile=E:\/Library\/MavenRepository\/union-pay-dao-1.0.0-SNAPSHOT.jar\u00a0-DgeneratePom=true<\/code><\/pre>\n
\u7136\u540e\u518d\u5728plugin\u7684pom\u4e2d\u6dfb\u52a0jar\u4f9d\u8d56\uff1a<\/p>\n
<dependency>\n    <groupId>xxx<\/groupId>\n    <artifactId>xxx<\/artifactId>\n    <version>1.0<\/version>\n<\/dependency><\/code><\/pre>\n
\u65b9\u6848\u4e09<\/h3>\n
\u5b89\u88c5jar\u5230\u9879\u76ee\uff1a<\/p>\n
mvn install:install-file -DgroupId=com.taozipay -DartifactId=union-pay-dao -Dversion=1.0.0-SNAPSHOT -Dpackaging=jar -Dfile=E:\\Library\\MavenRepository\\com\\taozipay\\union-pay-dao\\1.0.0-SNAPSHOT\\union-pay-dao-1.0.0-SNAPSHOT.jar -DgeneratePom=true -DlocalRepositoryPath=E:\\union-pay\\union-pay-dao\\src\\main\\resources\\lib2\\<\/code><\/pre>\n
\u7136\u540e\u518d\u5728plugin\u7684pom\u4e2d\u6dfb\u52a0jar\u4f9d\u8d56\uff1a<\/p>\n
<build>\n  <plugins>\n    <plugin>\n      <repositories>\n        <repository>\n          <id>in-project-repo<\/id>\n          <releases>\n            <checksumPolicy>ignore<\/checksumPolicy>\n          <\/releases>\n          <url>file:\/\/${project.basedir}\/repo<\/url>\n        <\/repository>\n      <\/repositories>\n...\n  <dependency>\n    <groupId>xxx<\/groupId>\n    <artifactId>xxx<\/artifactId>\n    <version>1.0<\/version>\n  <\/dependency><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9519\u8bef\u8bf4\u660e Mybatis generator\u786e\u5b9e\u597d\u7528\uff0c\u4f46\u662f\u79bb\u6211\u4eec\u7684\u751f\u4ea7\u4ee3\u7801\u8fd8\u662f\u6709\u5dee\u522b\u7684\u3002\u6bd4\u5982\u7f3a\u5c11toStrin […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-1503","post","type-post","status-publish","format-standard","hentry","category-mybatis"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1503"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/1503\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}