关于<usessdkhttp://developer.android.com/guide/topics/manifest/usessdkelement.htmlconsiderations(https://www.oschina.net/action/GoToLink?urlhttp%3A%2

思路分析：1\.根据需求抽象出业务对象User{usrename;password;}ShoppingCarItem{product;num;}ShoppingCar{List<ShoppingCarItem}2\.写Servlet处理请求...

openresty安装：1.下载openresty    wgethttps://openresty.org/download/openresty1.15.8.3.tar.gz2.安装依赖包    yumyinstallgccgccc pcrepcredevel zlibzlibdevel

node\_exporter部署tarxzvfnode_exporter0.18.1.linuxamd64.tar.gzcdnode_exporter0.18.1.linuxamd64nohup./node_exporteroutput.log2&1&prome

方法1：用SETPASSWORD命令　　mysqluroot　　mysqlSETPASSWORDFOR'root'@'localhost'PASSWORD('newpass');方法2：用mysqladmin　　mysqladminurootpassword"newpass"　　如果root已经设置过密

1\.常用框架框架阿里fastjson谷歌gsonJavaBean序列化为Json，性能：JacksonFastJsonGsonJsonlib2\.Jackson处理相关结果1\.指定字段

publicstaticvoidmain(String\\args)throwsIOException,ParseException{Map<String,StringmnewHashMap<String,String();m.put("1","haha");m.put("2","hehe");m.put(

1\.判断数据库是否存在casemnesia:system\_info(use\_dir)of    true        alread\_created;    \_        mnesia:create\_schema(\node()\)    end.2\.判断

21.编译执行下面代码会出现什么?packagemainvar(size:1024max_sizesize2)funcmain(){println(size,max_size)}解析

//1.在主启动类上加上支持定时任务的注解@EnableSchedulingpublicclassApplication{//2.编写定时任务@ComponentpublicclassOrderJob{@Autowiredp