Java code 模式的 mybatis-generator 生成代码模板，采用自定义插件方式选择性覆盖 xxxMapper.xml 文件

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>
  <!-- delete belown line, if generate by java code --/>
	<classPathEntry
		location="E:/oracle-driver-ojdbc6-12.1.0.1.jar" />

 <context id="DB2Tables" targetRuntime="MyBatis3" defaultModelType="flat">
		<plugin type="org.mybatis.generator.plugins.RenameExampleClassPlugin">
			<property name="searchString" value="Example$" />
			<property name="replaceString" value="Criteria" />
		</plugin>

		<plugin type="org.mybatis.generator.plugins.EqualsHashCodePlugin" />
		<plugin type="org.mybatis.generator.plugins.CaseInsensitiveLikePlugin" />
		<plugin type="org.mybatis.generator.plugins.SerializablePlugin" />
		<plugin type="org.mybatis.generator.plugins.ToStringPlugin" />
		<plugin type="org.mybatis.generator.plugins.RowBoundsPlugin" />
		<commentGenerator>
			<property name="suppressAllComments" value="true" />
			<property name="suppressDate" value="true" />
		</commentGenerator>

		<jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver"
			connectionURL="jdbc:oracle:thin:@192.168.1.2:1521:orcl"
			userId="username" password="password">
		</jdbcConnection>

		<javaTypeResolver>
			<property name="forceBigDecimals" value="false" />
		</javaTypeResolver>

		<!-- generate Model -->
		<javaModelGenerator targetPackage="com.abc.model"
			targetProject="src/main/java">
			<property name="enableSubPackages" value="true" />
			<property name="trimStrings" value="true" />
		</javaModelGenerator>


		<sqlMapGenerator targetPackage="mapping"
			targetProject="src/main/resources">
			<property name="enableSubPackages" value="true" />
		</sqlMapGenerator>


		<javaClientGenerator type="XMLMAPPER"
			targetPackage="com.abc.dao" targetProject="src/main/java">
			<property name="enableSubPackages" value="true" />
		</javaClientGenerator>

		<table schema="" tableName="tdatasource" domainObjectName="DataResource">
		</table>

	</context>
</generatorConfiguration>

IsMergeablePlugin.java

package MybatisPlugins;

import org.mybatis.generator.api.GeneratedXmlFile;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.api.PluginAdapter;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;


public class IsMergeablePlugin extends PluginAdapter {

    public static void main(String[] args) throws Exception{
    	List<String> warnings = new ArrayList<String>();
    	boolean overwrite = true;
    	ConfigurationParser cp = new ConfigurationParser(warnings);
    	Configuration config = cp.parseConfiguration(
    	        Object.class.getResourceAsStream("/generatorConfig.xml"));
    	DefaultShellCallback callback = new DefaultShellCallback(overwrite);
    	MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
    	myBatisGenerator.generate(null);
    }	
	
    @Override
    public boolean validate(List<String> warnings) {
        return true;
    }

    @Override
    public boolean sqlMapGenerated(GeneratedXmlFile sqlMap, IntrospectedTable introspectedTable) {
        try {
            Field field = sqlMap.getClass().getDeclaredField("isMergeable");
            field.setAccessible(true);
            field.setBoolean(sqlMap, false);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return true;
    }
}

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.abc</groupId>
	<artifactId>abc</artifactId>
	<version>1.0.0-SNAPSHOT</version>
	<packaging>jar</packaging>
	<properties>
		<jdk.version>1.8</jdk.version>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<plexus.vesion>2.6</plexus.vesion>
	</properties>
	<dependencies>
		<dependency>
			<groupId>com.hynnet</groupId>
			<artifactId>oracle-driver-ojdbc6</artifactId>
			<version>12.1.0.1</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis.generator</groupId>
			<artifactId>mybatis-generator-core</artifactId>
			<version>1.3.5</version>
		</dependency>
	</dependencies>
	<build>
		<plugins>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<configuration>
					<source>${jdk.version}</source>
					<target>${jdk.version}</target>
					<encoding>${project.build.sourceEncoding}</encoding>
				</configuration>

				<dependencies>
					<dependency>
						<groupId>org.codehaus.plexus</groupId>
						<artifactId>plexus-compiler-eclipse</artifactId>
						<version>${plexus.vesion}</version>
					</dependency>
				</dependencies>
			</plugin>
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-jar-plugin</artifactId>
				<version>2.3.1</version>
				<configuration>
					<excludes>
						<exclude>**/MybatisPlugins/*</exclude>
					</excludes>
				</configuration>
			</plugin>
		</plugins>
	</build>
</project>