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+package org.apache.velocity.example;
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import org.apache.velocity.VelocityContext;
+import org.apache.velocity.app.Velocity;
+import org.apache.velocity.exception.MethodInvocationException;
+import org.apache.velocity.exception.ParseErrorException;
+
+import java.io.StringWriter;
+
+/**
+ * This class is a simple demonstration of how the Velocity Template Engine
+ * can be used in a standalone application using the Velocity utility class.
+ *
+ * It demonstrates two of the 'helper' methods found in the org.apache.velocity.util.Velocity
+ * class, mergeTemplate() and evaluate().
+ *
+ *
+ * @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
+ * @version $Id$
+ */
+
+public class Example2
+{
+ public static void main( String args[] )
+ {
+ /* first, we init the runtime engine. Defaults are fine. */
+
+ try
+ {
+ Velocity.init();
+ }
+ catch(Exception e)
+ {
+ System.out.println("Problem initializing Velocity : " + e );
+ return;
+ }
+
+ /* lets make a Context and put data into it */
+
+ VelocityContext context = new VelocityContext();
+
+ context.put("name", "Velocity");
+ context.put("project", "Engine");
+
+ /* lets render a template */
+
+ StringWriter w = new StringWriter();
+
+ try
+ {
+ Velocity.mergeTemplate("example2.vm", "ISO-8859-1", context, w );
+ }
+ catch (Exception e )
+ {
+ System.out.println("Problem merging template : " + e );
+ }
+
+ System.out.println(" template : " + w );
+
+ /*
+ * lets dynamically 'create' our template
+ * and use the evaluate() method to render it
+ */
+
+ String s = "We are using $project $name to render this.";
+ w = new StringWriter();
+
+ try
+ {
+ Velocity.evaluate( context, w, "mystring", s );
+ }
+ catch( ParseErrorException pee )
+ {
+ /*
+ * thrown if something is wrong with the
+ * syntax of our template string
+ */
+ System.out.println("ParseErrorException : " + pee );
+ }
+ catch( MethodInvocationException mee )
+ {
+ /*
+ * thrown if a method of a reference
+ * called by the template
+ * throws an exception. That won't happen here
+ * as we aren't calling any methods in this
+ * example, but we have to catch them anyway
+ */
+ System.out.println("MethodInvocationException : " + mee );
+ }
+ catch( Exception e )
+ {
+ System.out.println("Exception : " + e );
+ }
+
+ System.out.println(" string : " + w );
+ }
+}