在Eclipse中集成scala环境后,发现导入的Spark包报错,提示是:object apache is not a member of package org,网上说了一大推,其实问题很简单: 解决办法:在创建scala工程是,到了创建包的这一步是我们要选择: 而不是创建java工程是的Java程序的包类型:然后创建scala类的时候也是一样,注意选择是scala class而不是java class. 这样创建的项目,我们在将外部包,build path进来后,发现不再报错.…
Spark程序编译报错: [INFO] Compiling 2 source files to E:\Develop\IDEAWorkspace\spark\target\classes at 1567004370534[ERROR] E:\Develop\IDEAWorkspace\spark\src\main\scala\cn\itcast\wordCount\WordCount.scala:3: error: object apache is not a member of package…
catalogue . Java xStream . DynamicProxyConverter . java.beans.EventHandler . RCE via XStream object deserialization . Standard way to serialize and deserialize Objects with XStream . SECURITY- / CVE-- . What to do about it 0. 利用方式跟踪 目前为止,已知有两个触发方式 xs…
Table of Contents Introduction Key concepts Collect topology configuration data Generate a runbook from the topology Install a deployable package Back up the database and computer instance Update files Run database synchronization Start all services…
In this tutorial, we will extend last Maven + Spring hello world example by adding JDBC support, to use Spring + JDBC to insert a record into a customer table. 1. Customer table In this example, we are using MySQL database. CREATE TABLE `customer` (…
1. Object类的hashCode()方法,如下: public int hashCode():返回该对象的哈希码值,这个值和地址值有关,但是不是实际地址值(哈希码值是根据实际地址值转化过来的整数值),你可以理解为地址值. 2. Object类的getClass()方法,如下: public final Class getClass():返回此 Object 的运行时类(返回的类型是Class类,实际返回的是Class类的对象实体) Cl…