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John Peter
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Examples
Hello world basic java velocity Example How to use string as velocity template data with Example How to use Input stream or BLOB binary stream as velocity template file with Example How to use list object with foreach in Java Velocity Example How to use HashMap in Java velocity template with Example How to use Nested for loop in Java velocity with Example How to use If statement in Java velocity with Example
Examples [cont'd]
How to use Else-If ladder in Java velocity with Example How to use For loop in Java velocity with Example How to use #break in foreach of Java apache velocity with Example How to use #continue in foreach of Java apache velocity with Example How to use Single line and Multiline Comment in Java apache velocity with Example How to use expressions with #set method of java apache velocity with Example How to use Java Class in apache velocity template engine with Example
Examples [cont'd]
How to include vm file into another vm file in java apache velocity with Example How to create methods in Java apache velocity using #macro with Example How to escape velocity template reserved words or keywords in .vm with Example How to exit from the velocity template language execution using #stop with Example How to use arithmetic expressions in java apache velocity with Example How to use not specified velocity context variable value as empty in VTL with Example
How to use Input stream or BLOB binary stream as velocity template file with Example
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Hints 
In this example how to use blob data instead of vm file from FilePath.

RuntimeServices Class provides the interface to the Template class and template parse the blob information via StringBuffer castring. DB based blob data can use as template instead of using .vm files.
Example
Blob blob = new SerialBlob("Username is $username".getBytes());

RuntimeServices rs = RuntimeSingleton.getRuntimeServices();            
StringReader sr = new StringReader(IOUtils.toString(blob.getBinaryStream()));
SimpleNode sn = rs.parse(sr, "User Information");

Template t = new Template();
    t.setRuntimeServices(rs);
    t.setData(sn);
    t.initDocument();

VelocityContext vc = new VelocityContext();
vc.put("username", "John");

StringWriter sw = new StringWriter();
t.merge(vc, sw);
    
System.out.println(sw.toString());
BLOB Binary stream data 
Username is $username
Output 
Username is John
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