J2EE、WEBGIS項(xiàng)目開(kāi)發(fā) Tapestry、Prado、Zend框架學(xué)習(xí)

Tomcat啟動(dòng)時(shí)classloader加載順序
  Tomcat的class加載的優(yōu)先順序一覽  
  1.最先是$JAVA_HOME/jre/lib/ext/下的jar文件。  
  2.環(huán)境變量CLASSPATH中的jar和class文件。  
  3.$CATALINA_HOME/common/classes下的class文件。  
  4.$CATALINA_HOME/commons/endorsed下的jar文件。  
  5.$CATALINA_HOME/commons/i18n下的jar文件。  
  6.$CATALINA_HOME/common/lib   下的jar文件。  
  （JDBC驅(qū)動(dòng)之類的jar文件可以放在這里，這樣就可以避免在server.xml配置好數(shù)據(jù)源卻出現(xiàn)找不到JDBC   Driver的情況。）  
  7.$CATALINA_HOME/server/classes下的class文件。  
  8.$CATALINA_HOME/server/lib/下的jar文件。  
  9.$CATALINA_BASE/shared/classes   下的class文件。  
  10.$CATALINA_BASE/shared/lib下的jar文件。  
  11.各自具體的webapp   /WEB-INF/classes下的class文件。  
  12.各自具體的webapp   /WEB-INF/lib下的jar文件。

What this means is that leadership involves setting direction, communicating that vision passionately to those they work with, and helping the people they lead understand and commit to that vision. Managers, on the other hand, are responsible for ensuring that the vision is implemented efficiently and successfully.

but what if my form field name is array

<input type=text name="n1[]" id="n1[]" value='12345">   <input type=text name="n1[]" id="n1[]" value="14454">  

how to send these 2 field value send to url by jquery post method?

You can pass in an array as a value in the object:

{name: 'John', 'nl[]': ['12345', '14454']}  

(This is documented at ajax but also works for post.)

var fields = $(":input").serializeArray();      $.post("test.php",fields);

from:http://stackoverflow.com/questions/1656267/how-to-send-multi-field-value-by-jquery-post

string.replace(new RegExp(oldString,"gm"),newString))

在網(wǎng)上看到解決方案是把注冊(cè)表里（因?yàn)槭莣indows操作系統(tǒng)）\HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE 下的NLS_lang 的NA值修改為SIMPLIFIED CHINESE_CHINA.ZHS16GBK；
 但是我在操作的時(shí)候，只把Oracle目錄下所有能找到的NLS_Lang值修改了，偏偏沒(méi)有修改Oracle目錄所對(duì)應(yīng)的NLS_Lang值，導(dǎo)致一直測(cè)試不通過(guò)，始終報(bào)錯(cuò)，最后終于發(fā)現(xiàn)原來(lái)Oracle目錄本身對(duì)應(yīng)的NLS_lang值沒(méi)有修改，修改過(guò)后，測(cè)試通過(guò)，成功！

If you got this message: "Warning: Cannot modify header information - headers already sent by ...."
如果在執(zhí)行php程序時(shí)看到這條警告:"Warning: Cannot modify header information - headers already sent by ...."

Few notes based on the following user posts:
有以下幾種解決方法:

1. Blank lines (空白行):
Make sure no blank line after <?php ... ?> of the calling php script.
檢查有<?php ... ?> 后面沒(méi)有空白行，特別是include或者require的文件。不少問(wèn)題是這些空白行導(dǎo)致的。

2. Use exit statement (用exit來(lái)解決):
Use exit after header statement seems to help some people
在header后加上exit();
header ("Location: xxx");
exit();

3. PHP has this annoying problem, if your HTML goes before any PHP code or any header modification before redirecting to certain page, it'll said "Warning: Cannot modify header information - headers already sent by ...." Basically anytime you output to browser, the header is set and cannot be modified.   So two ways to get around the problem:

3a. Use Javascript (用Javascript來(lái)解決):
<? echo "<script> self.location(\"file.php\");</script>"; ?>
Since it's a script, it won't modify the header until execution of Javascript.
可以用Javascript來(lái)代替header。但是上面的這段代碼我沒(méi)有執(zhí)行成功... 另外需要注意，采用這種方法需要瀏覽器支持Javascript.

3b. Use output buffering (用輸出緩存來(lái)解決):
<?php ob_start(); ?>
... HTML codes ...
<?php
... PHP codes ...
header ("Location: ....");
ob_end_flush();
?>
This will save the output buffer on server and not output to browser yet, which means you can modify the header all you want until the ob_end_flush() statement.   This method is cleaner than the Javascript since Javascript method assumes the browser has Javascript turn on.   However, there are overhead to store output buffer on server before output, but with modern hardware I would imagine it won't be that big of deal.   Javascript solution would be better if you know for sure your user has Javascript turn on on their browser.

就像上面的代碼那樣，這種方法在生成頁(yè)面的時(shí)候緩存，這樣就允許在輸出head之后再輸出header了。


————————————————————————————————————————————
結(jié)果最后還是這個(gè)問(wèn)題：
原來(lái)是php.ini里面的配置出了問(wèn)題，output_buffering參數(shù)默認(rèn)為off的，現(xiàn)在將它設(shè)為”on”就ＯＫ了。