calling a java method in velocity template
Parameter names in java method and template can be different. You may try to locate your problem using the following example.
Example.java
package com.example.currency;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.Template;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.exception.ResourceNotFoundException;
import java.io.*;
public class Example
{
public Example(String templateFile)
{
try
{
Velocity.init("velocity.properties");
VelocityContext context = new VelocityContext();
CurrencyUtil cu = new CurrencyUtil();
cu.setCurrencyRate("EUR", 1.25);
context.put("formatter", cu);
Template template = null;
try
{
template = Velocity.getTemplate(templateFile);
}
catch( ResourceNotFoundException rnfe )
{
System.out.println("Example : error : cannot find template " + templateFile );
}
catch( ParseErrorException pee )
{
System.out.println("Example : Syntax error in template " + templateFile + ":" + pee );
}
BufferedWriter writer = new BufferedWriter(
new OutputStreamWriter(System.out));
if ( template != null)
template.merge(context, writer);
writer.flush();
writer.close();
}
catch( Exception e )
{
System.out.println(e);
}
}
public static void main(String[] args)
{
Example t = new Example("example.vm");
}
}
CurrencyUtil.java
package com.example.currency;
import java.util.Map;
import java.util.HashMap;
public class CurrencyUtil {
private static Map<String, Double> rates = new HashMap<String, Double>();
public double getCurrencyRate(String symbol){
return rates.get(symbol);
}
public void setCurrencyRate(String symbol, double currencyRate){
rates.put(symbol, currencyRate);
}
public double convertCurrency(String symbol, long value){
return value * getCurrencyRate(symbol);
}
}
example.vm
#set( $total = 10000000000)
#set( $currency = "EUR")
$formatter.convertCurrency($currency, $total)