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2009年3月14日 #

js 实现list元素的上下左右移动

<%@ page contentType="text/html; charset=GB2312" language="java"%>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
<title>调整上下左右顺序实例</title>
<link rel="stylesheet" href="style/style_<%=strCssType%>.css"
type="text/css">
<script language="JavaScript">
function chooseItems(source, target)
{
var choiceOptions = source.options;
var selectedOptions = target.options;

for (i = 0; i < (choiceOptions.length); i++)
{
var temp = choiceOptions.item(i);
if (temp.selected == true)
{
var oOption = document.createElement("OPTION");
selectedOptions[selectedOptions.length] = new Option(temp.text, temp.value);
}
}

for (j = (choiceOptions.length-1); j >= 0; j--)
{
var temp = choiceOptions.item(j);
if (temp.selected == true)
{
choiceOptions[j] = null;
}
}
}

function adjustUp()
{
var itemOptions = form1.selectcolumns.options;
var selectedOption;
var count = 0;
var index;
for ( i = 0; i < itemOptions.length ; i++)
{
var temp = itemOptions.item(i);
if (temp.selected == true)
{
count++;
if (count > 1)
{
alert("只能选择一个列调整顺序！");
return;
} else if(count == 1) {
index = i;
}
}
}
if (count == 0)
{
alert("请选择要调整顺序的列！");
return;
}

if (index == 0)
return;

selectedOption = itemOptions[index];
var lastOption = itemOptions[index-1];
var temp = new Option(selectedOption.text, selectedOption.value);

selectedOption.text = lastOption.text;
selectedOption.value = lastOption.value;
selectedOption.selected = false;

lastOption.text = temp.text;
lastOption.value = temp.value;
lastOption.selected = true;
}

function adjustDown()
{
var itemOptions = form1.selectcolumns.options;
var selectedOption;
var count = 0;
var index;
for ( i = 0; i < itemOptions.length ; i++)
{
var temp = itemOptions[i];
if (temp.selected == true)
{
count++;
if (count > 1)
{
alert("只能选择一个列调整顺序！");
return;
} else if(count == 1) {
index = i;
}
}
}

if (count == 0)
{
alert("请选择要调整顺序的列！");
return;
}

if (index == itemOptions.length-1)
return;
selectedOption = itemOptions[index];
var nextOption = itemOptions[index+1];
var temp = new Option(selectedOption.text, selectedOption.value);

selectedOption.text = nextOption.text;
selectedOption.value = nextOption.value;
selectedOption.selected = false;

nextOption.text = temp.text;
nextOption.value = temp.value;
nextOption.selected = true;
}

function checkForm(form1)
{
var columnsOptions = form1.selectcolumns.options;

if (columnsOptions.length == 0) {
alert("请选择要显示的列!");
return false;
}

for (i = 0; i < columnsOptions.length; i++)
{
columnsOptions[i].selected = true;
} 

return true;
}

</script>
</head>

<body>
<form name="form1" method="post" action="basylistForward.do"
onSubmit="return checkForm(form1)">
<center>

<table height="5" border="0" align="center" cellpadding="0"
cellspacing="0">
<tr>
<td></td>
</tr>
</table>
<table width="700">
<tr>
<td width="40%" align="center">
<select name="choices" size="25" style="width: 100%"
multiple="multiple">
<option value="userName">
用户名
</option>
<option value="password">
密码
</option>
<option value="Email">
邮箱
</option>
<option value="address">
住址
</option>
<option value="telephone">
联系方式
</option>
<OPTION value="birthday">
生日
</OPTION>
<OPTION value="firstName">
名
</OPTION>
<OPTION value="lastName">
姓
</OPTION>
<option value="age">
年龄
</option>
<option value="company">
工作单位
</option>
<option value="workTime">
参加工作日期
</option>

</select>
</td>
<td width="10%" align="center">
<input name="but_r" type="button" class="buttonr"  value="添加"
onClick="chooseItems(form1.choices, form1.selectcolumns)">
<table height="5" border="0" align="center" cellpadding="0"
cellspacing="0">
<tr>
<td></td>
</tr>
</table>
<input name="but_l" type="button" class="buttonl" value="删除"
onClick="chooseItems(form1.selectcolumns, form1.choices)">
</td>
<td width="40%" align="center">
<select name="selectcolumns" size="25" style="width: 100%"
multiple="multiple">
<option value="BasySex_n">
性别
</option>
<option value="BasyAge">
年龄
</option>
<option value="BasyRdate">
入院日期
</option>
<option value="BasyCDate">
出院日期
</option>
<option value="BasyCykbN">
出院科别
</option>
<option value="BasyCyMzd">
主要诊断名称
</option>
<option value="BasyCyMcyqk_n">
出院情况
</option>
<option value="BasyZyfySum">
住院费用
</option>
<option value="BasyJzh">
备用号
</option>
</select>
</td>
<td width="10%" align="center">
<input name="but_u" type="button"  value="向上"
onClick="adjustUp()">
<table height="5" border="0" align="center" cellpadding="0"
cellspacing="0">
<tr>
<td></td>
</tr>
</table>
<input name="but_d" type="button" value="向下"
onClick="adjustDown()">
</td>
</tr>
<tr>
<TD align="center">
&nbsp;
</TD>
<TD align="center">
&nbsp;
</TD>
<TD align="center">
<INPUT type="submit" class="button" value="显示(V)" 　accesskey="v">
&nbsp;&nbsp;
<a href="javascript:history.go(-1)"><font color="red">返回</font>
</a>
</TD>
<TD align="center">
&nbsp;
</TD>
</tr>
</table>
</center>
</form>
</body>
</html>

posted @ 2009-03-14 07:34 强强 阅读(62) | 评论 (0) | 编辑 收藏

2008年12月28日 #

ant build.xml 编译指定javac

<javac srcdir="${src.dir}" destdir="${build.dir}" fork="true" executable="C:\j2sdk1.4.2_03\bin\javac" memorymaximumsize="128m">
   <classpath refid="project.classpath" />
  </javac>

posted @ 2008-12-28 14:22 强强 阅读(283) | 评论 (0) | 编辑 收藏

2008年5月23日 #

怎么样彻底杀死某用户的所有进程

su - username -c 'kill -9 -1'

posted @ 2008-05-23 11:58 强强 阅读(90) | 评论 (0) | 编辑 收藏

2007年12月25日 #

释放linux Cache

因为LINUX的内核机制，一般情况下不需要特意去释放已经使用的cache。这些cache起来的内容可以增加文件以及的读写速度。
先说下free命令怎么看内存

[root@yuyii proc]# free
total used free shared buffers cached
Mem: 515588 295452 220136 0 2060 64040
-/+ buffers/cache: 229352 286236
Swap: 682720 112 682608

其中第一行用全局角度描述系统使用的内存状况：
total——总物理内存
used——已使用内存，一般情况这个值会比较大，因为这个值包括了cache+应用程序使用的内存
free——完全未被使用的内存
shared——应用程序共享内存
buffers——缓存，主要用于目录方面,inode值等（ls大目录可看到这个值增加）
cached——缓存，用于已打开的文件
note:
total=used+free
used=buffers+cached (maybe add shared also)

第二行描述应用程序的内存使用：
前个值表示-buffers/cache——应用程序使用的内存大小，used减去缓存值
后个值表示+buffers/cache——所有可供应用程序使用的内存大小，free加上缓存值
note:
-buffers/cache=used-buffers-cached
+buffers/cache=free+buffers+cached

第三行表示swap的使用：
used——已使用
free——未使用

cache释放：
To free pagecache:
echo 1 > /proc/sys/vm/drop_caches
To free dentries and inodes:
echo 2 > /proc/sys/vm/drop_caches
To free pagecache, dentries and inodes:
echo 3 > /proc/sys/vm/drop_caches

说明，释放前最好sync一下，防止丢数据。

posted @ 2007-12-25 13:23 强强 阅读(1143) | 评论 (1) | 编辑 收藏

2007年8月6日 #

增加表空间

(1)查看表空间
SELECT   a.tablespace_name   "表空间名",total   表空间大小,free   表空间剩余大小, 
  (total-free)   表空间使用大小, 
  ROUND((total-free)/total,4)*100   "使用率   %" 
  FROM     (SELECT   tablespace_name,SUM(bytes)   free   FROM   DBA_FREE_SPACE 
  GROUP   BY   tablespace_name   )   a, 
  (SELECT   tablespace_name,SUM(bytes)   total   FROM   DBA_DATA_FILES 
  GROUP   BY   tablespace_name)   b 
WHERE   a.tablespace_name=b.tablespace_name;
(2)增加表空间文件
alter tablespace tsname add datafile 'e:\datafile_name.dbf" size xxM;

posted @ 2007-08-06 13:17 强强 阅读(129) | 评论 (0) | 编辑 收藏

2007年6月7日 #

oracle数据库 系统sql

1.监控事例的等待：
select event,sum(decode(wait_time,0,0,1)) prev, sum(decode(wait_time,0,1,0)) curr,count(*)
from v$session_wait
group by event order by 4;
2.回滚段的争用情况：
select name,waits,gets,waits/gets ratio from v$rollstat a,v$rollname b where a.usn=b.usn;
3.监控表空间的I/O比例：
select df.tablespace_name name,df.file_name "file",f.phyrds pyr,f.phyblkrd pbr,f.phywrts pyw,
f.phyblkwrt pbw
from v$filestat f,dba_data_files df
where f.file#=df.file_id
4.监空文件系统的I/O比例：
select substr(a.file#,1,2) "#",substr(a.name,1,30) "name",a.status,a.bytes,
b.phyrds,b.phywrts
from v$datafile a,v$filestat b
where a.file#=b.file#
5.在某个用户下找所有的索引：
select user_indexes.table_name, user_indexes.index_name,uniqueness, column_name
from user_ind_columns, user_indexes
where user_ind_columns.index_name = user_indexes.index_name
and user_ind_columns.table_name = user_indexes.table_name
order by user_indexes.table_type, user_indexes.table_name,
user_indexes.index_name, column_position;
6. 监控 SGA 的命中率

select a.value + b.value "logical_reads", c.value "phys_reads",
round(100 * ((a.value+b.value)-c.value) / (a.value+b.value)) "BUFFER HIT RATIO"
from v$sysstat a, v$sysstat b, v$sysstat c
where a.statistic# = 38 and b.statistic# = 39
and c.statistic# = 40;

7. 监控 SGA 中字典缓冲区的命中率

select parameter, gets,Getmisses , getmisses/(gets+getmisses)*100 "miss ratio",
(1-(sum(getmisses)/ (sum(gets)+sum(getmisses))))*100 "Hit ratio"
from v$rowcache
where gets+getmisses <>0
group by parameter, gets, getmisses;

8. 监控 SGA 中共享缓存区的命中率，应该小于1%

select sum(pins) "Total Pins", sum(reloads) "Total Reloads",
sum(reloads)/sum(pins) *100 libcache
from v$librarycache;

select sum(pinhits-reloads)/sum(pins) "hit radio",sum(reloads)/sum(pins) "reload percent"
from v$librarycache;

9. 显示所有数据库对象的类别和大小

select count(name) num_instances ,type ,sum(source_size) source_size ,
sum(parsed_size) parsed_size ,sum(code_size) code_size ,sum(error_size) error_size,
sum(source_size) +sum(parsed_size) +sum(code_size) +sum(error_size) size_required
from dba_object_size
group by type order by 2;

10. 监控 SGA 中重做日志缓存区的命中率，应该小于1%

SELECT name, gets, misses, immediate_gets, immediate_misses,
Decode(gets,0,0,misses/gets*100) ratio1,
Decode(immediate_gets+immediate_misses,0,0,
immediate_misses/(immediate_gets+immediate_misses)*100) ratio2
FROM v$latch WHERE name IN ('redo allocation', 'redo copy');

11. 监控内存和硬盘的排序比率，最好使它小于 .10，增加 sort_area_size

SELECT name, value FROM v$sysstat WHERE name IN ('sorts (memory)', 'sorts (disk)');


12. 监控当前数据库谁在运行什么SQL语句

SELECT osuser, username, sql_text from v$session a, v$sqltext b
where a.sql_address =b.address and username='POINT' order by address, piece;

13. 监控字典缓冲区

SELECT (SUM(PINS - RELOADS)) / SUM(PINS) "LIB CACHE" FROM V$LIBRARYCACHE;
SELECT (SUM(GETS - GETMISSES - USAGE - FIXED)) / SUM(GETS) "ROW CACHE" FROM V$ROWCACHE;
SELECT SUM(PINS) "EXECUTIONS", SUM(RELOADS) "CACHE MISSES WHILE EXECUTING" FROM V$LIBRARYCACHE;

后者除以前者,此比率小于1%,接近0%为好。

SELECT SUM(GETS) "DICTIONARY GETS",SUM(GETMISSES) "DICTIONARY CACHE GET MISSES"
FROM V$ROWCACHE

14. 找ORACLE字符集

select * from sys.props$ where name='NLS_CHARACTERSET';

15. 监控 MTS

select busy/(busy+idle) "shared servers busy" from v$dispatcher;

此值大于0.5时，参数需加大

select sum(wait)/sum(totalq) "dispatcher waits" from v$queue where type='dispatcher';
select count(*) from v$dispatcher;
select servers_highwater from v$mts;

servers_highwater接近mts_max_servers时，参数需加大

16. 碎片程度

select tablespace_name,count(tablespace_name) from dba_free_space group by tablespace_name
having count(tablespace_name)>10;

alter tablespace name coalesce;
alter table name deallocate unused;

create or replace view ts_blocks_v as
select tablespace_name,block_id,bytes,blocks,'free space' segment_name from dba_free_space
union all
select tablespace_name,block_id,bytes,blocks,segment_name from dba_extents;

select * from ts_blocks_v;

select tablespace_name,sum(bytes),max(bytes),count(block_id) from dba_free_space
group by tablespace_name;

查看碎片程度高的表

SELECT segment_name table_name , COUNT(*) extents
FROM dba_segments WHERE owner NOT IN ('SYS', 'SYSTEM') GROUP BY segment_name
HAVING COUNT(*) = (SELECT MAX( COUNT(*) ) FROM dba_segments GROUP BY segment_name);

17. 表、索引的存储情况检查

select segment_name,sum(bytes),count(*) ext_quan from dba_extents where
tablespace_name='&tablespace_name' and segment_type='TABLE' group by tablespace_name,segment_name;

select segment_name,count(*) from dba_extents where segment_type='INDEX' and owner='&owner'
group by segment_name;

18、找使用CPU多的用户session

12是cpu used by this session

select a.sid,spid,status,substr(a.program,1,40) prog,a.terminal,osuser,value/60/100 value
from v$session a,v$process b,v$sesstat c
where c.statistic#=12 and c.sid=a.sid and a.paddr=b.addr order by value desc;

20.监控log_buffer的使用情况：(值最好小于1%，否则增加log_buffer 的大小)
select rbar.name,rbar.value,re.name,re.value,(rbar.value*100)/re.value||'%' "radio"
from v$sysstat rbar,v$sysstat re
where rbar.name='redo buffer allocation retries'
and re.name='redo entries';


19、查看运行过的SQL语句：

SELECT SQL_TEXT
FROM V$SQL


关于线程活动状态查询
 SELECT S.SID, S.SERIAL#,S.USERNAME,S.STATUS,S.MACHINE,S.PROGRAM,S.MODULE,A.SQL_TEXT
   FROM V$SESSION S,
   V$SQLAREA A
  WHERE S.USERNAME IS NOT NULL
  AND S.SQL_ADDRESS = A.ADDRESS;

posted @ 2007-06-07 11:01 强强 阅读(141) | 评论 (0) | 编辑 收藏

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