SpringBoot整合Mybatis自定义拦截器不起作用的处理方案

mybatis:
  mapper-locations: classpath*:/mapping/*.xml
  type-aliases-package: com.tellme.pojo
  #读取全局配置的地址
  config-location: classpath:mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="cacheEnabled" value="true"/>
        <setting name="lazyLoadingEnabled" value="true"/>
        <setting name="multipleResultSetsEnabled" value="true"/>
        <setting name="useColumnLabel" value="true"/>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <setting name="useGeneratedKeys" value="true"/>
        <setting name="defaultExecutorType" value="SIMPLE"/>
        <setting name="defaultStatementTimeout" value="25000"/>
    </settings>
    <typeAliases>
        <typeAlias alias="Integer" type="java.lang.Integer"/>
        <typeAlias alias="Long" type="java.lang.Long"/>
        <typeAlias alias="HashMap" type="java.util.HashMap"/>
        <typeAlias alias="LinkedHashMap" type="java.util.LinkedHashMap"/>
        <typeAlias alias="ArrayList" type="java.util.ArrayList"/>
        <typeAlias alias="LinkedList" type="java.util.LinkedList"/>
    </typeAliases>
    <!--配置的插件名-->
    <plugins>
        <plugin interceptor="com.xxx.yyy.plugins.PrintSqlInfoInterceptor"/>
    </plugins>
</configuration>

@Configuration
@ConditionalOnClass({ SqlSessionFactory.class, SqlSessionFactoryBean.class })
@ConditionalOnBean(DataSource.class)
@EnableConfigurationProperties(MybatisProperties.class)
@AutoConfigureAfter(DataSourceAutoConfiguration.class)
public class MybatisAutoConfiguration {
  private static Log log = LogFactory.getLog(MybatisAutoConfiguration.class);
  @Autowired
  private MybatisProperties properties;
   //会依赖注入Spring容器中所有的mybatis的Interceptor拦截器
  @Autowired(required = false)
  private Interceptor[] interceptors;
   ...
  @Bean
  @ConditionalOnMissingBean
  public SqlSessionFactory sqlSessionFactory(DataSource dataSource) throws Exception {
    SqlSessionFactoryBean factory = new SqlSessionFactoryBean();
    factory.setDataSource(dataSource);
    factory.setVfs(SpringBootVFS.class);
    if (StringUtils.hasText(this.properties.getConfigLocation())) {
      factory.setConfigLocation(this.resourceLoader.getResource(this.properties.getConfigLocation()));
    }
    factory.setConfiguration(properties.getConfiguration());
    //手动放入到了setPlugins方法中。
    if (!ObjectUtils.isEmpty(this.interceptors)) {
      factory.setPlugins(this.interceptors);
    }
    if (this.databaseIdProvider != null) {
      factory.setDatabaseIdProvider(this.databaseIdProvider);
    }
    if (StringUtils.hasLength(this.properties.getTypeAliasesPackage())) {
      factory.setTypeAliasesPackage(this.properties.getTypeAliasesPackage());
    }
    if (StringUtils.hasLength(this.properties.getTypeHandlersPackage())) {
      factory.setTypeHandlersPackage(this.properties.getTypeHandlersPackage());
    }
    if (!ObjectUtils.isEmpty(this.properties.resolveMapperLocations())) {
      factory.setMapperLocations(this.properties.resolveMapperLocations());
    }
    return factory.getObject();
  }
   ...
}

protected SqlSessionFactory buildSqlSessionFactory() throws IOException {
    Configuration configuration;
    ...读取属性中的plugins，即org.mybatis.spring.SqlSessionFactoryBean#setPlugins设置的。
    if (!isEmpty(this.plugins)) {
        for (Interceptor plugin: this.plugins) {
            configuration.addInterceptor(plugin);
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("Registered plugin: '" + plugin + "'");
            }
        }
    }
    ...解析xml配置（通过反射创建拦截器对象）
    if (xmlConfigBuilder != null) {
        try {
            xmlConfigBuilder.parse();
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("Parsed configuration file: '" + this.configLocation + "'");
            }
        } catch(Exception ex) {
            throw new NestedIOException("Failed to parse config resource: " + this.configLocation, ex);
        } finally {
            ErrorContext.instance().reset();
        }
    }
    return this.sqlSessionFactoryBuilder.build(configuration);
}

private void pluginElement(XNode parent) throws Exception {
    if (parent != null) {
        for (XNode child: parent.getChildren()) {
            String interceptor = child.getStringAttribute("interceptor");
            Properties properties = child.getChildrenAsProperties();
            //反射创建mybatis的插件。
            Interceptor interceptorInstance = (Interceptor) resolveClass(interceptor).newInstance();
            interceptorInstance.setProperties(properties);
            configuration.addInterceptor(interceptorInstance);
        }
    }
}

@Intercepts({@Signature(type = Executor.class,method = "query",args = {MappedStatement.class,Object.class, RowBounds.class,ResultHandler.class})})
public class MyPageInterceptor implements Interceptor {
    private static final Logger logger= LoggerFactory.getLogger(MyPageInterceptor.class);
    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        logger.warn(invocation.toString());
        return invocation.proceed();
    }
    @Override
    public Object plugin(Object o) {
        return Plugin.wrap(o,this);
    }
    @Override
    public void setProperties(Properties properties) {
        logger.warn(properties.toString());
    }
}

mybatis:
  type-aliases-package: me.zingon.pagehelper.model
  mapper-locations: classpath:mapper/*.xml
  configuration:
    map-underscore-to-camel-case: true
    default-fetch-size: 100
    default-statement-timeout: 30

@Configuration
public class MybatisConfig {
    @Bean
    ConfigurationCustomizer mybatisConfigurationCustomizer() {
        return new ConfigurationCustomizer() {
            @Override
            public void customize(org.apache.ibatis.session.Configuration configuration) {
                configuration.addInterceptor(new MyPageInterceptor());
            }
        };
    }
}

mybatis:
  config-location: classpath:mybatis.xml
  type-aliases-package: me.zingon.pagehelper.model
  mapper-locations: classpath:mapper/*.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <typeAliases>
        <package name="me.zingon.pacargle.model"/>
    </typeAliases>
    <plugins>
        <plugin interceptor="me.zingon.pagehelper.interceptor.MyPageInterceptor"> 
            <property name="dialect" value="oracle"/>
        </plugin>
    </plugins>
</configuration>