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1、下载路径:
https://redis.io/download
2、解压,编译安装:
$ sudo make
$ sudo make install
3、启动:
$ redis-server
4、客户端访问:
redis-cli
5、更改密码:
在配置文件中配置requirepass的密码(当redis重启时密码依然有效)。
# requirepass foobared
如 修改成 :
requirepass 123456
6、带密码登录:
$ redis-cli -p 6379 -a 123456
7、停止服务:
$ redis-cli -p 6379 -a 123456 shutd ...
group by限制列,不适用group by查询时间最小的订单
select user_id,req_money,loan_term,`status`,created_at from renrenhua.order_request a
where not exists
(select b.id from renrenhua.order_request b inner join renrenhua.order_request c on b.user_id=c.user_id and b.created_at>c.created_at where a.id=b.id)
...
1、读取properties
//props.load(new FileInputStream(ClassUtils.getDefaultClassLoader().getResource("").getPath() + File.separator + "email.properties"));
props.load(EmailService.class.getClassLoader().getResourceAsStream("email.properties"));
2、生成Excel
//获取cla ...
1、pom.xml依赖包引入
<dependency>
<groupId>net.sourceforge.jexcelapi</groupId>
<artifactId>jxl</artifactId>
<version>2.6.12</version>
</dependency>
2、具体代码
//创建excel
String fileName = getExcelFileName(list.get(0));
File ...
1、pom.xml依赖包引入
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.5.5</version>
</dependency>
2、email.properties文件
#email
mail.smtp.host=smtp.mxhichina.com
mail.smtp.socketFactory.port=465
...
Highcharts使用例子
- 博客分类:
- JS
1、引用文件
<script type="text/javascript" th:src="@{../../highcharts/highcharts.js}"></script>
<script type="text/javascript" th:src="@{../../highcharts/exporting.js}"></script>
<script type="text/javascript" th:src="@{ ...
oracle树查询
SELECT R.RESOURCE_ID,R.RESOURCE_NAME,R.RESOURCE_URL,R.RESOURCE_TYPE,R.CREATE_TIME,R.STATUS
,RS.RESOURCE_STRUCTURE_ID,RS.RESOURCE_LEVEL,RS.PARENT_RESOURCE_ID,RS.RESOURCE_SORTNUMBER
FROM T_SYS_RESOURCE_STRUCTURE RS JOIN T_SYS_RESOURCE R ON R.RESOURCE_ID = RS.RESOURCE_ID
STAR ...
mysql批量语句执行语法错误解决:
jdbc:mysql://localhost:3306/dbname?useUnicode=true&characterEncoding=utf-8&allowMultiQueries=true
1、批量删除
Mapper.java
public void deleteCommunityRelUser(@Param("communityId") String communityId,@Param("userIdList") List<String> userIdList) throws E ...
1、后台代码Websocket.java
package com.sinosoft.tyoa.websocket;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpe ...
一、按时间点恢复
1、赋予Flash存储的权限:
ALTER TABLE GM_USER.T_SHSJGL_AREL ENABLE ROW MOVEMENT;
2、表数据还原到指定时间点
FLASHBACK TABLE GM_USER.T_SHSJGL_AREL TO TIMESTAMP TO_TIMESTAMP('2014-11-21 11:00:00','yyyy-mm-dd hh24:mi:ss');
二、按SCN点恢复
1、获得当前SCN
SELECT DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER FROM DUAL;
2、如果能够确切知道删除之前 ...
启动参数配置:
-Xmx3000M
-Xms3000M
-Xmn600M
-XX:PermSize=500M
-XX:MaxPermSize=500M
-Xss256K
-XX:+DisableExplicitGC
-XX:SurvivorRatio=1
-XX:+UseConcMarkSweepGC
-XX:+UseParNewGC
-XX:+CMSParallelRemarkEnabled
-XX:+UseCMSCompactAtFullCollection
-XX:CMSFullGCsBeforeCompaction=0
-XX:+CMSClassUnloadingEnabled
-XX: ...
1、WHERE子句中的连接顺序:
ORACLE采用自下而上的顺序解析WHERE子句,根据这个原理,表之间的连接必须写在其他WHERE条件之前, 那些可以过滤掉最大数量记录的条件必须写在WHERE子句的末尾。
2、SELECT子句中避免使用'*'。
3、最高效的删除重复记录方法:
DELETE FROM FROM T_SHSJGL_AR A
WHERE A.ROWID > (SELECT MIN(B.ROWID)
FROM T_SHSJGL_AR B
WHERE A.ZJHM = B.ZJHM AND A. ...
java读取excel文档 导入数据库
- 博客分类:
- Java
前台页面:
<form id="fileUpload" action="<%=basePath%>shsjgl-person/PersonAction!importExcel.action" enctype="multipart/form-data" method="post">
<input id="excel" name="excel" type="file"/>
<input type=&quo ...
查询输入区段时间内数据,包含两端。
1、起始日期、终止日期必须同时填写,或者同时不填写:
var csrqStart = document.getElementById("arVO.csrqStart").value;
var csrqEnd = document.getElementById("arVO.csrqEnd").value;
var t1 =(csrqStart != null && csrqStart != '');
var t2 =(csrqEnd != null && csrqEnd != ...
sql---两个查询
- 博客分类:
- SQL
1.SELECT D.WGMC, D.JDMC, D.HS, COUNT(6) ZS
FROM
(SELECT C.WGMC WGMC,C.WGBM WGBM,C.JDMC JDMC,C.HS HS
FROM (SELECT COUNT(2) HS,WG.WGMC,WG.WGBM,JD.JDMC
FROM T_SHSJGL_GH H, T_SHSJGL_WG WG,T_SHSJGL_SQ SQ,T_SHSJGL_JD JD WHERE
H.GRID_ID = WG.ID AND WG.SQID = SQ.ID AND SQ.JDID = JD.ID GROUP BY WG.WG ...