mybatis 的interceptorChain是給擴展用的, 常用的比如分頁擴展插件. mybatis提供的rowbounds實質(zhì)上是采用 fetchSize, rs.next 這種方式. 其性能很差. (實際上就是游標(biāo), .next() 一點點向下滾動)

其采用了反射,一個典型的Interceptor

@Intercepts({
        @Signature(type = Executor.class, method = "query", args = { MappedStatement.class, Object.class,
                RowBounds.class, ResultHandler.class }),
        @Signature(type = Executor.class, method = "close", args = { boolean.class }) })
public class MyBatisInterceptor implements Interceptor {

    private Integer value;

    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        return invocation.proceed();
    }

    @Override
    public Object plugin(Object target) {
        //do something
        
        return Plugin.wrap(target, this);
    }

    @Override
    public void setProperties(Properties properties) {
        //do something
    }

}

比如分頁插件可以通過增強以下接口實現(xiàn)

public interface StatementHandler {
    <E> List<E> query(Statement statement, ResultHandler resultHandler) throws SQLException;

    BoundSql getBoundSql();
}

詳情請參見分頁插件源碼