使用mybatis-generator添加自定义分页插件时提示无法实例化插件类

[zcxgz362324]

<build>
<plugins>
<!-- mybatis自动生成插件 -->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.1</version>
<configuration>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
</build>







package com.guitar.pub.plugin;
import java.util.List;

import org.mybatis.generator.api.CommentGenerator;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.PluginAdapter;
import org.mybatis.generator.api.dom.java.Field;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.java.PrimitiveTypeWrapper;
import org.mybatis.generator.api.dom.java.TopLevelClass;
import org.mybatis.generator.api.dom.xml.Attribute;
import org.mybatis.generator.api.dom.xml.TextElement;
import org.mybatis.generator.api.dom.xml.XmlElement;

/**
* <P>File name : PaginationPlugin.java </P>
* <P>Author : fly </P>
* <P>Date : 2013-7-2 上午11:50:45 </P>
*/
public class PaginationPlugin extends PluginAdapter {
@Override
public boolean modelExampleClassGenerated(TopLevelClass topLevelClass,
IntrospectedTable introspectedTable) {
// add field, getter, setter for limit clause
addLimit(topLevelClass, introspectedTable, "limitStart");
addLimit(topLevelClass, introspectedTable, "limitEnd");
return super.modelExampleClassGenerated(topLevelClass,
introspectedTable);
}
@Override
public boolean sqlMapSelectByExampleWithoutBLOBsElementGenerated(
XmlElement element, IntrospectedTable introspectedTable) {
// XmlElement isParameterPresenteElemen = (XmlElement) element
// .getElements().get(element.getElements().size() - 1);
XmlElement isNotNullElement = new XmlElement("if"); //$NON-NLS-1$
isNotNullElement.addAttribute(new Attribute("test", "limitStart != null and limitStart>=0")); //$NON-NLS-1$ //$NON-NLS-2$
// isNotNullElement.addAttribute(new Attribute("compareValue", "0")); //$NON-NLS-1$ //$NON-NLS-2$
isNotNullElement.addElement(new TextElement(
"limit #{limitStart} , #{limitEnd}"));
// isParameterPresenteElemen.addElement(isNotNullElement);
element.addElement(isNotNullElement);
return super.sqlMapUpdateByExampleWithoutBLOBsElementGenerated(element,
introspectedTable);
}
private void addLimit(TopLevelClass topLevelClass,
IntrospectedTable introspectedTable, String name) {
CommentGenerator commentGenerator = context.getCommentGenerator();
Field field = new Field();
field.setVisibility(JavaVisibility.PROTECTED);
// field.setType(FullyQualifiedJavaType.getIntInstance());
field.setType(PrimitiveTypeWrapper.getIntegerInstance());
field.setName(name);
// field.setInitializationString("-1");
commentGenerator.addFieldComment(field, introspectedTable);
topLevelClass.addField(field);
char c = name.charAt(0);
String camel = Character.toUpperCase(c) + name.substring(1);
Method method = new Method();
method.setVisibility(JavaVisibility.PUBLIC);
method.setName("set" + camel);
method.addParameter(new Parameter(PrimitiveTypeWrapper.getIntegerInstance(), name));
method.addBodyLine("this." + name + "=" + name + ";");
commentGenerator.addGeneralMethodComment(method, introspectedTable);
topLevelClass.addMethod(method);
method = new Method();
method.setVisibility(JavaVisibility.PUBLIC);
method.setReturnType(PrimitiveTypeWrapper.getIntegerInstance());
method.setName("get" + camel);
method.addBodyLine("return " + name + ";");
commentGenerator.addGeneralMethodComment(method, introspectedTable);
topLevelClass.addMethod(method);
}
/**
* This plugin is always valid - no properties are required
*/
public boolean validate(List<String> warnings) {
return true;
}

}









<?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>
<!-- 数据库驱动包位置 -->
<classPathEntry location="C:\Users\Administrator\.m2\repository\mysql\mysql-connector-java\5.1.29\mysql-connector-java-5.1.29.jar" />
<context id="DB2Tables" targetRuntime="MyBatis3">
<!-- 这里引入扩展插件 -->
<plugin type="com.guitar.pub.plugin.PaginationPlugin" />

<commentGenerator>
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 数据库链接URL、用户名、密码 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/guitarPig" userId="root" password="">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 生成模型的包名和位置 -->
<javaModelGenerator targetPackage="com.guitar.biz.user.entity" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- 生成的映射文件包名和位置 -->
<sqlMapGenerator targetPackage="com.guitar.biz.user.dao" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 生成DAO的包名和位置 -->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.guitar.biz.user.dao" targetProject=".\src\main\java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- 要生成那些表(更改tableName和domainObjectName就可以) -->
<table tableName="t_user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" >
<columnOverride column="is_use" property="isUse" javaType="Boolean"/>
</table>
</context>
</generatorConfiguration>


java.lang.RuntimeException: Cannot instantiate object of type com.guitar.pub.plugin.PaginationPlugin
at org.mybatis.generator.internal.ObjectFactory.createInternalObject(ObjectFactory.java:137)
at org.mybatis.generator.internal.ObjectFactory.createPlugin(ObjectFactory.java:174)
at org.mybatis.generator.config.Context.generateFiles(Context.java:463)
at org.mybatis.generator.api.MyBatisGenerator.generate(MyBatisGenerator.java:233)
at org.mybatis.generator.maven.MyBatisGeneratorMojo.execute(MyBatisGeneratorMojo.java:184)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:132)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:120)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:347)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:154)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:584)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:213)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:157)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
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)
Caused by: java.lang.ClassNotFoundException: com.guitar.pub.plugin.PaginationPlugin
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:259)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:242)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:227)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:169)
at org.mybatis.generator.internal.ObjectFactory.internalClassForName(ObjectFactory.java:123)
at org.mybatis.generator.internal.ObjectFactory.createInternalObject(ObjectFactory.java:133)
... 25 more







这个类肯定是存在的,但是不知道为什么它无法实例化,难道还有其他的配置吗