package cn.xiaows.app.dao;
import cn.xiaows.app.entity.User;
import java.util.List;
public interface UserMapper {
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table user
*
* @mbg.generated Sat Jan 05 19:19:00 CST 2019
*/
int deleteByPrimaryKey(Integer id);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table user
*
* @mbg.generated Sat Jan 05 19:19:00 CST 2019
*/
int insert(User record);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table user
*
* @mbg.generated Sat Jan 05 19:19:00 CST 2019
*/
User selectByPrimaryKey(Integer id);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table user
*
* @mbg.generated Sat Jan 05 19:19:00 CST 2019
*/
List selectAll();
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table user
*
* @mbg.generated Sat Jan 05 19:19:00 CST 2019
*/
int updateByPrimaryKey(User record);
}
UserMapper.xml
delete from user
where id = #{id,jdbcType=INTEGER}
insert into user (id, name, age
)
values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{age,jdbcType=INTEGER}
)
update user
set name = #{name,jdbcType=VARCHAR},
age = #{age,jdbcType=INTEGER}
where id = #{id,jdbcType=INTEGER}
1. aggregateByKey的运行机制
/**
* Aggregate the values of each key, using given combine functions and a neutral "zero value".
* This function can return a different result type
spark-sql是Spark bin目录下的一个可执行脚本，它的目的是通过这个脚本执行Hive的命令，即原来通过
hive>输入的指令可以通过spark-sql>输入的指令来完成。
spark-sql可以使用内置的Hive metadata-store，也可以使用已经独立安装的Hive的metadata store
关于Hive build into Spark
// Max value in Array
var arr = [1,2,3,5,3,2];Math.max.apply(null, arr); // 5
// Max value in Jaon Array
var arr = [{"x":"8/11/2009","y":0.026572007},{"x"
在使用XMlhttpRequest对象发送请求和响应之前，必须首先使用javaScript对象创建一个XMLHttpRquest对象。
var xmlhttp；
function getXMLHttpRequest(){
if(window.ActiveXObject){
xmlhttp:new ActiveXObject("Microsoft.XMLHTTP
