2014/05 Travel

從挑夫古道遠眺望龍埤

望龍埤

基隆外木山

[iReport] Exported Excel Report But Has Missing Data

Problem
I am using iReport 5.5 in my project, the requirement is to use iReport to design report template, and export the report with pdf and xls format.
The problem is as I export pdf format, I can see complete data

but as I export xls format, the xls report has lost data in page header band.

Solution
The missing data problem results from the overlapping elements (even 1 pixel).

After I fixed the overlapping problems (add one more space between elements)

I can see complete data in xls report.

How do I sort an array of files according to their last modified dates?

Apache commons IO provide LastModifiedFileComparator to do file sorting based on its last modified date/time.
It provide two instance:
1. LASTMODIFIED_COMPARATOR: Last modified comparator instance
2. LASTMODIFIED_REVERSE: Reverse last modified comparator instance

Example
1. Read files from old to new

   /**  
    * The main method.  
    *   
    * @param args  
    *      the arguments  
    */  
   public static void main(String args[]) {  
     Collection files =   
       FileUtils.listFiles(new File(FmsBatchConfig.INPUT_FOLDER_PATH), // assign file path  
                 FileFilterUtils.prefixFileFilter("COP0407"), // assign file name  
                 FalseFileFilter.FALSE);// include subdirectories  
     File[] fileArr = files.toArray(new File[files.size()]);  
     Arrays.sort(fileArr, LastModifiedFileComparator.LASTMODIFIED_COMPARATOR);//from old to new  
     // print file name  
     for (File file : fileArr) {  
       System.out.println(file.getName()+"["+new Date(file.lastModified())+"]");  
     }  
   }  

The console will print

 COP0407_01_1030501.txt[Thu May 08 16:45:01 CST 2014]  
 COP0407_01_1030502.txt[Fri May 23 10:31:45 CST 2014]  

2. Read files from new to old

   /**  
    * The main method.  
    *   
    * @param args  
    *      the arguments  
    */  
   public static void main(String args[]) {  
     Collection files =   
       FileUtils.listFiles(new File(FmsBatchConfig.INPUT_FOLDER_PATH), // assign file path  
                 FileFilterUtils.prefixFileFilter("COP0407"), // assign file name  
                 FalseFileFilter.FALSE);// include subdirectories  
     File[] fileArr = files.toArray(new File[files.size()]);  
     Arrays.sort(fileArr, LastModifiedFileComparator.LASTMODIFIED_REVERSE);//from new to old  
     // print file name  
     for (File file : fileArr) {  
       System.out.println(file.getName()+"["+new Date(file.lastModified())+"]");  
     }  
   }  

The console will print

 COP0407_01_1030502.txt[Fri May 23 10:31:45 CST 2014]  
 COP0407_01_1030501.txt[Thu May 08 16:45:01 CST 2014]  

Reference
[1] http://commons.apache.org/proper/commons-io/apidocs/org/apache/commons/io/comparator/LastModifiedFileComparator.html

How to get all files with specific name in a directory(including subdirectories) using Commons IO

Requirement
1. Search specific directory called "COP0407" 
2. Search through all directories called "COP0407" 

Supposed the directory is D:\psrdata\transfer\ftp\tofms, and has one subdirectory D:\psrdata\transfer\ftp\tofms\done

Solution
Apache commons IO package provide FileUtils for general file manipulation, here has two sample code
1. Search specific directory called "COP0407"  (exclude subdirectory)

   public static void main(String args[]) {  
     Collection files=  
     FileUtils.listFiles(new File(FmsBatchConfig.INPUT_FOLDER_PATH), //assign file path  
                    FileFilterUtils.prefixFileFilter("COP0407"), //assign file name  
                    FalseFileFilter.FALSE);//exclude subdirectories  
     //print file name  
     for(File file : files) {  
       System.out.println(file.getName());  
     }  
   }  

The console will print

 COP0407_01_1030501.txt  
 COP0407_01_1030502.txt  

2. Search through all directories called "COP0407" 

   public static void main(String args[]) {  
     Collection files=  
     FileUtils.listFiles(new File(FmsBatchConfig.INPUT_FOLDER_PATH), //assign file path  
                    FileFilterUtils.prefixFileFilter("COP0407"), //assign file name  
                    TrueFileFilter.TRUE);//include subdirectories  
     //print file name  
     for(File file : files) {  
       System.out.println(file.getName());  
     }  
   }  

The console will print

 COP0407_01_1030501.txt  
 COP0407_01_1030502.txt  
 COP0407_01_1030501 (2).txt  

Reference
[1] http://commons.apache.org/proper/commons-io/apidocs/org/apache/commons/io/FileUtils.html#listFiles(java.io.File, org.apache.commons.io.filefilter.IOFileFilter, org.apache.commons.io.filefilter.IOFileFilter)

Create custom display filter in AngularJS

Requirement

Assume we have a drop down list which used to control the currency unit display.

It has two options, the first one is dollar. You can see the amount had been used dollar as its currency unit display.

The second option is a hundred million. You can see the amount had been used hundred million as its currency unit display.

Custom display filter

AngularJS provide some build-in filter, ex. number filter can used to determine If the input is not a number an empty string is returned.

In order to create a new filter, you are going to create a fms421rCurrency module and register your custom filter with this module:

   //根據資料單位下拉單的選項，決定顯示於前端的金額單位是元或億  
   app.filter('fms421rCurrency', ['$filter', function ($filter, $scope) {  
     var fun = function(input, id) {  
       try{  
         input = BigDecimalROUND_HALF_UP(input, id);  
         return input;  
       }catch (e) {  
         return "";  
       }  
     };  
    return fun;  
   }]);  
  //根據資料單位下拉單的選項，決定金額是否要除以100000000  
   var BigDecimalROUND_HALF_UP = function(input, id){  
     if(input == 0){  
       return new BigDecimal("0");  
     }  
     var numb = new BigDecimal(input.toString());  
     var bil = new BigDecimal("100000000");   
     if ("02"==id) {//01:元, 02:億  
       numb = numb.divide(bil,0, BigDecimal.prototype.ROUND_HALF_UP);  
     }  
     return numb;  
   };  

The syntax for using filters in Angular templates is as follows:

{{ expression | filter }}

We can apply the filter in the fms421r tempate page:

 <td class="text-right border-right">   
 {{fms421rDto.dayRslt1|fms421rCurrency:model.dataunit.id|fms421rnative|number}}  
 </td>   

Reference

[1] https://docs.angularjs.org/api/ng/filter/number

[2] https://docs.angularjs.org/tutorial/step_09

[3] http://ithelp.ithome.com.tw/question/10140497

虛擬股市交易系統

如果手上資金不夠，可以利用這個虛擬交易網站做股票進出、練功
順便觀察、參考其他人的進出 http://www.cmoney.tw/

Reference
[1] http://www.cmoney.tw/notes/note-detail.aspx?cid=22814&nid=11548&utm_source=Facebook&utm_medium=Timeline&utm_term=Notes&utm_content=nid%3D11548&utm_campaign=nid%3D11548

[Oracle] LISTAGG function

Requirement
The following SQL statement will retrieve multiple row of data

SELECT PDATE,
       ACC || F_SYS_FIND_ACC_NM(:SCODE, :FYR, ACC, '000') AS ACC_NM
FROM CF0006
WHERE ACC LIKE '24%'
      AND LENGTH(TRIM(ACC))=11

But my requirement is to turn these multiple row of data into a single row per group.

Solution

Oracle provided LISTAGG function to fulfill this kind of requirement.

LISTAGG is an aggregate function that can optionally be used as an analytic (i.e. the optional OVER() clause). The following elements are mandatory:

• the column or expression to be aggregated;
• the WITHIN GROUP keywords;
• the ORDER BY clause within the grouping.

The arguments to the function are subject to the following rules:

• The measure_expr can be any expression. Null values in the measure column are ignored.
• The delimiter_expr designates the string that is to separate the measure values. This clause is optional and defaults to NULL.
• The order_by_clause determines the order in which the concatenated values are returned. The function is deterministic only if the ORDER BY column list achieved unique ordering.

For example. The following group-set aggregate example lists, for each pdate in the CF0006 table, the ACC_NM in that CF0006 in order of their pdate (separate with comma):

SELECT PDATE,
       LISTAGG(ACC || F_SYS_FIND_ACC_NM(:SCODE, :FYR, ACC, '000'), ', ') WITHIN
       GROUP (ORDER BY PDATE) "ACC_NM_LIST"
FROM CF0006
WHERE ACC LIKE '24%'
      AND LENGTH(TRIM(ACC))=11
GROUP BY PDATE;

Reference
[1] http://docs.oracle.com/cd/E11882_01/server.112/e10592/functions089.htm#SQLRF55593
[2] http://www.oracle-developer.net/display.php?id=515

java.lang.NullPointerException: Cannot find parameter "json" from request.

Problem

I found out I fail to execute print functions in every function in my system.

And the console throw this exception message:

 java.lang.NullPointerException: Cannot find parameter "json" from request.  
   at java.util.Objects.requireNonNull(Objects.java:226) ~[na:1.7.0_25]  
   at com.cht.commons.web.resolver.JsonParamResolver.resolveArgument(JsonParamResolver.java:34) ~[cht-commons-web-0.1.0-SNAPSHOT.jar:0.1.0-SNAPSHOT]  

Root Cause
As I check its request header, it submit nothing

It result from my request had been blocked by AdBlock (Chrome Plug-in), which I installed yesterday. That's why I failed to execute every print function today.

As I disabled this Chrome plug-in, AdBlock, and check its request header again. We can see request header had submitted data.

Finally, my report function had recovered.

ORA-01422 Error From Oracle Function

Problem
I wrote an Oracle function on my own as bellows:

CREATE OR REPLACE FUNCTION F_FMS420R_GET_ACCUM_AMTA (S_YYY_MM IN VARCHAR2 --起始年月
 ,E_YYY_MM IN VARCHAR2 --結束年月
 ,ASP IN VARCHAR2 --性質別
) RETURN NUMBER IS AMT_A NUMBER(20, 2) := 0;

 BEGIN
SELECT AMT_A INTO AMT_A FROM
  (SELECT YEAR, ASP, SUM(AMT_A) AS AMT_A
   FROM FMS420FA
   WHERE (YYY_MM BETWEEN S_YYY_MM AND E_YYY_MM)
     AND ASP = ASP
   GROUP BY YEAR, ASP);

 RETURN (AMT_A);

 END F_FMS420R_GET_ACCUM_AMTA;

After I test it, it show this error message as bellows:

 ORA-01422: exact fetch returns more than requested number of rows (精確擷取傳回的列數超過所要求的列數) 
 ORA-06512: 在 "AP_PSR.F_FMS420R_GET_ACCUM_AMTA", line 9  
 ORA-06512: 在 line 11  

But this select SQL statement must return one record, if I provide all search criteria

SELECT YEAR,
       ASP,
       SUM(B.AMT_A) AS AMT_A
FROM FMS420FA B
WHERE B.YYY_MM BETWEEN :S_YYY_MM AND :E_YYY_MM
  AND B.ASP = :ASP
GROUP BY YEAR,
         ASP

Root cause
This error result from the parameter name cannot be equal to database column name. If yes, Oracle will not know what I am doing and ignore this search criteria. That's why it will have ORA-01422 error.

Solution
Just rename input parameter name from ASP to INPUT_ASP, then this problem can be resolved.

CREATE OR REPLACE FUNCTION F_FMS420R_GET_ACCUM_AMTA (S_YYY_MM IN VARCHAR2 --起始年月
 ,E_YYY_MM IN VARCHAR2 --結束年月
 ,INPUT_ASP IN VARCHAR2 --性質別
) RETURN NUMBER IS AMT_A NUMBER(20, 2) := 0;

 BEGIN
SELECT AMT_A INTO AMT_A FROM
  (SELECT YEAR, ASP, SUM(AMT_A) AS AMT_A
   FROM FMS420FA
   WHERE (YYY_MM BETWEEN S_YYY_MM AND E_YYY_MM)
     AND ASP = INPUT_ASP
   GROUP BY YEAR, ASP);

 RETURN (AMT_A);

 END F_FMS420R_GET_ACCUM_AMTA;

[Apache Maven Problem] org/apache/maven/shared/ filtering/MavenFilteringException

Problem
As I build my JavaEE project with Apache Maven in Eclipse, it show this error message in my Eclipse

 Multiple annotations found at this line:  
 Execution default-resources of goal org.apache.maven.plugins:maven-resources-plugin:2.6:resources failed: A required class was missing while executing org.apache.maven.plugins:maven-resources-plugin:2.6:resources: org/apache/maven/shared/filtering/MavenFilteringException   
 -----------------------------------------------------   
 realm =      plugin>org.apache.maven.plugins:maven-resources-plugin:2.6   
 strategy = org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy   
 urls[0] = file:/C:/Users/javis-msi/.m2/repository/org/apache/maven/     plugins/maven-resources-plugin/2.6/maven-resources-plugin-2.6.jar   
 urls[1] = file:/C:/Users/javis-msi/.m2/repository/org/apache/maven/reporting/maven-reporting-api/2.0.6/maven-reporting-api-2.0.6.jar   
 urls[2] = file:/C:/Users/javis-msi/.m2/     repository/org/apache/maven/doxia/doxia-sink-api/1.0-alpha-7/doxia-sink-api-1.0-alpha-7.jar   
 urls[3] = file:/C:/Users/javis-     msi/.m2/repository/commons-cli/commons-cli/1.0/commons-cli-1.0.jar   
 urls[4] = file:/C:/Users/javis-msi/.m2/repository/org/codehaus/plexus/plexus-interactivity-api/1.0-alpha-4/plexus-interactivity-api-1.0-alpha-4.jar   
 urls[5] = file:/C:/Users/javis-msi/.m2/     repository/junit/junit/3.8.1/junit-3.8.1.jar   
 urls[6] = file:/C:/Users/javis-msi/.m2/repository/org/codehaus/plexus/plexus-utils/2.0.5/plexus-utils-2.0.5.jar   
 urls[7] = file:/C:/Users/javis-msi/.m2/repository/org/apache/maven/shared/maven-filtering/1.1/maven-     filtering-1.1.jar   
 urls[8] = file:/C:/Users/javis-msi/.m2/repository/org/codehaus/plexus/plexus-interpolation/1.13/plexus-interpolation-1.13.jar   
 Number of foreign imports: 4  

I try to do mvn clean install again, again, and again. But still in vain.

Solution
This problem may result from you have broken jar files. Try to retrieve jar files again. The steps are as follows:

Step1. Go to you .m2 folder, and delete everything.

Step2. Retrieve all jar files again. 

201404 Travel

烏來

201404 Kyoto

京都某處櫻花

金閣寺

彥根城

平等院

奈良

平野神社

平安神宮

CronMaker - a utility which helps you to build cron expressions

It's a good utility to build cron expression as I use Quartz to write batch program.
http://www.cronmaker.com/

SVN error on Eclipse: org.tigris.subversion.javahl.ClientException: Attempted to lock an already-locked dir

Problem
As I commit my source code to SVN in eclipse, but Eclipse shut down unexpectedly. After I launch Eclipse again, and try to commit again, it show this error message:

 org.apache.subversion.javahl.ClientException: Attempted to lock an already-locked dir  
 svn: Commit failed (details follow):  
 svn: Working copy 'D:\workspace\fms\fms-webapp\src\main\java\gov\nta\fms\web\controller' locked.  
 svn: 'D:\workspace\fms\fms-webapp\src\main\java\gov\nta\fms\web\controller' is already locked. 

Solution
Right click on the offending project, click Team and then select Refresh/Cleanup. SVN gets the offending .lock files and deletes them. 

cleanup D:/workspace/fms/fms-webapp/src/main/java  

After Refresh/Cleanup, I can commit source code successfully

commit -m "add 4 spaces for rptInfo parameter" D:/workspace/fms/fms-webapp/src/main/java/gov/nta/fms/web/controller/Fms406rReportController.java  
   Sending    D:/workspace/fms/fms-webapp/src/main/java/gov/nta/fms/web/controller/Fms406rReportController.java  
   Transmitting file data ...  
   Committed revision 1264.  

Reference

[1] http://sherk.wordpress.com/2008/09/15/svn-error-on-eclipse-orgtigrissubversionjavahlclientexception-attempted-to-lock-an-already-locked-dir/

How to set Static IP Address from command line

Requirement
Owing I need to move workplace from office to customer site lately, I need to change my laptop's IP address as I change workplace. So I edit a batch file to set my static IP address automatically.

Syntax
Let’s say I want to give my Windows 7 system an IP address of 10.144.38.195, a subnet mask of 255.255.255.0, a default gateway of 10.144.38.254. Type the following command and save as a batch file with encoding with ANSI

 netsh interface ipv4 set address name="區域連線" source=static address=10.144.38.195 mask=255.255.255.0 gateway=10.144.38.254  

The address will be found via netsh interface ipv4 show interfaces command.

Idx   Met     MTU     狀態         名稱  
 --- ---------- ---------- ------------ ---------------------------  
  1     50 4294967295 connected   Loopback Pseudo-Interface 1  
  13     50    1500 disconnected 無線網路連線  
  12      1    1500 disconnected 區域連線  
  19     30    1500 disconnected 區域連線 2  
  16     40    1500 disconnected Bluetooth 網路連線  
  20     20    1500 connected   區域連線 3  

In this case, I would like to configure 區域連線. So the address name="區域連線"

Step by step
Step1. open command prompt.
Step2. execute the batch script file, i.e.SetIP4Office.bat

 C:\Users\albert\Desktop>SetIP4Office.bat  
 C:\Users\albert\Desktop>netsh interface ipv4 set address name="區域連線" source=static address=10.14  
 4.38.195 mask=255.255.255.0 gateway=10.144.38.254  

Well Done!

So you can edit different batch files to set different IP address for different workplace.

Reference
[1] http://www.windowsreference.com/networking/how-to-set-staticdhcp-ip-address-from-command-line/

Bat(Batch) script 執行出現出現中文亂碼問題

Problem
I edit a batch script which be used to set IP address

netsh interface ipv4 set address name="區域連線" source=static address=10.144.38.195 mask=255.255.255.0 gateway=10.144.38.254 

But when I execute this batch script in command prompt, it seems that the Traditional Chinese characters are broken.

C:\Users\albert\Desktop>netsh interface ipv4 set address name="?€?€??" source=static address=10.14  
 4.38.195 mask=255.255.255.0 gateway=10.144.38.254  
 檔案名稱、目錄名稱或磁碟區標籤語法錯誤。  

Solution
This problem results from the encoding of the batch script file. You need to change its encoding from UTF-8 to ANSI.

Reference
[1] http://www.bathome.net/viewthread.php?tid=24088

投資的最高境界是「不交易」！

這篇文章不錯

[quote 1]「掌握波段，比殺進殺出要賺得多。」

[quote 2]大盤K值從高處滑落到20附近，就開始買，一路往下買，回彈到80以上，就一路往上賣。

[quote 3]「停損」當然是最重要的一招。只要持股跌了10%到15%，就該執行停損，認賠出場。

[quote 4]如果你忘了當初買進的價格，或許你在面對它反彈到相對高價時，你會捨得去賣它。什麼叫「相對高價」？就是技術指標呈現過熱訊號，或是股價來到重要壓力區。

[quote 5]股市還有一句名言：「會買股票不稀奇，會賣股票才是師父。」就算是手上的股票處於獲利狀態，也要懂得「停利」。KD值都來到95以上，這時你若還奢望持股會繼續漲不停，就很可能只是一場「紙上富貴」

http://www.businesstoday.com.tw/article-content-80494-106484?page=1

How do I insert a record if it does not exist in Oracle?

Requirement

Here has two report items as following:

Each year has its own report items, ex. 102年度--未滿一年之短期融資, 103年度--未滿一年之短期融資, 102年度--公債及賒借收入, 103年度--公債及賒借收入, etc.

This sort of information had been stored in this table.

Our requirement is to generate the two report items automatically next year.

Solution
We can use merge statement to accomplish this requirement.
Step1: Find record(s) in FMS405FA based on our defined search criteria
Step2: Result
2.1: If does not find any record, then insert data into FMS405FA
2.2: If found record(s), then skip it.

MERGE INTO FMS405FA T1 
USING DUAL ON(T1.ACCYR =
     (SELECT TRIM(TO_CHAR(EXTRACT(YEAR FROM SYSDATE)-1911, '000'))  FROM DUAL)
      AND T1.RPT_TYPE='FMS434R'
      AND T1.RPT_NO='0001') 
WHEN NOT MATCHED THEN 
  INSERT(T1.ACCYR, T1.RPT_TYPE, T1.RPT_NO, T1.RPT_NM)
  VALUES(
         (SELECT TRIM(TO_CHAR(EXTRACT(YEAR FROM SYSDATE)-1911, '000'))
          FROM DUAL), 'FMS434R', '0001',

         (SELECT TRIM(TO_CHAR(EXTRACT(YEAR FROM SYSDATE)-1911, '000'))
          FROM DUAL)||'年度--未滿一年之短期融資')

MERGE INTO FMS405FA T1 
USING DUAL 
ON(T1.ACCYR =
   (SELECT TRIM(TO_CHAR(EXTRACT(YEAR FROM SYSDATE)-1911, '000')) FROM DUAL)
   AND T1.RPT_TYPE='FMS434R'
   AND T1.RPT_NO='0002') 
WHEN NOT MATCHED THEN 
  INSERT(T1.ACCYR, T1.RPT_TYPE, T1.RPT_NO, T1.RPT_NM)
  VALUES(
         (SELECT TRIM(TO_CHAR(EXTRACT(YEAR FROM SYSDATE)-1911, '000'))
          FROM DUAL), 'FMS434R', '0002',

         (SELECT TRIM(TO_CHAR(EXTRACT(YEAR FROM SYSDATE)-1911, '000'))
          FROM DUAL)||'年度--公債及賒借收入')

Reference
[1] http://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9016.htm#SQLRF01606

How to create a Boolean field in Oracle

Problem
If we would like to create a field, it will store the information if this datum had create by external system or be added by manual. 
Originally, I would like to crate a field with Boolean data type. But it seems that Oracle does not support Boolean data type.

Solution
We can use the check constraint to limit its value, i.e. 'Y' means adding by manual, 'N' means adding by external system.
ex.

ALTER TABLE FMS435FB ADD CONSTRAINT SELF_ADDED_CHECK CHECK (SELF_ADDED IN ('N',
                                                                           'Y'));

Reference
[1] http://www.techonthenet.com/oracle/check.php