One machine can do the work of fifty ordinary men. No machine can do the work of one extraordinary man

Friday, March 29, 2013

Generate HTML Content in JAVA

This post is for generating HTML content in java. You can use 3rd party jar called rendersnake to do this kind of thing very easily. This has class called HTMLCanvas and you use hierarchical structure to build the HTML.

You can find more samples and information from

This is a free opensource library and can find the license here :

Here is a sample code snippet

    HtmlCanvas htmlCanvas = new HtmlCanvas();

HtmlAttributes tableAttributes = new HtmlAttributes();
.add("border", "1")
.add("bgcolor", "#E8E8E8")
.add("cellspacing", "0")
.add("cellpadding", "5")
.add("bordercolor", "#B0B0B0");

HtmlAttributes rowHeaderAttribute = new HtmlAttributes();
rowHeaderAttribute.add("bgcolor", "#C8C8C8");

HtmlAttributes taskRowHeaderAttribute = new HtmlAttributes();
taskRowHeaderAttribute.add("bgcolor", "#C8C8C8");
taskRowHeaderAttribute.add("width", "400");
taskRowHeaderAttribute.add("height", "50");

HtmlAttributes cellColor = new HtmlAttributes();
cellColor.add("bgcolor", "#009933");

.b().content("Status : OK")

for(int i=0; i<10; i++) {"Task " + i)
.td().content("User " + i)
.td().content("Host " + i)
.td(cellColor).content("Status " + 1)
   System.out.println("Result : " + htmlCanvas.toHtml());

Following is the result of above code.

You need to add the jar that downloaded from the above link and can do this kind of table very easily. If there is a exception occurred when you run the application call specifically "commons-lang3-3.1.jar" not found, you need to add that jar file as well. You can find this jar from

Wednesday, March 27, 2013

Java DateTime Formatting

You can use following mechanism to get the date and time as a format you preferred. You need to use the Calendar class in the java.util package. It is possible to filter the date time using SimpleDateFormat class in the java.text package by passing the format to the constructor.

LetterDate or Time ComponentPresentationExamples
GEra designatorTextAD
MMonth in yearMonthJulyJul07
wWeek in yearNumber27
WWeek in monthNumber2
DDay in yearNumber189
dDay in monthNumber10
FDay of week in monthNumber2
EDay in weekTextTuesdayTue
aAm/pm markerTextPM
HHour in day (0-23)Number0
kHour in day (1-24)Number24
KHour in am/pm (0-11)Number0
hHour in am/pm (1-12)Number12
mMinute in hourNumber30
sSecond in minuteNumber55
zTime zoneGeneral time zonePacific Standard TimePSTGMT-08:00
ZTime zoneRFC 822 time zone-0800

public String getTimeStamp(){
Calendar cal = Calendar.getInstance();
Date date = cal.getTime();

SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd_hhmmss");

String timeStamp = "";

try {
timeStamp = format.format(date);
} catch (Exception e1) {

return timeStamp;