1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Velocity", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
import java.io.IOException;
import java.io.FileNotFoundException;
import java.util.Properties;
import java.util.Vector;
import javax.servlet.ServletConfig;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.velocity.Template;
import org.apache.velocity.context.Context;
import org.apache.velocity.servlet.VelocityServlet;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.exception.ResourceNotFoundException;
import org.apache.velocity.exception.ParseErrorException;
/**
* Sample of how to use the VelocityServlet.
* This example shows how to add objects to the context and
* pass them to the template.
*
* @author Dave Bryson
* @author <a href="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
* @version $Id: SampleServlet.java,v 1.5 2001/12/10 12:02:44 geirm Exp $
*/
public class SampleServlet extends VelocityServlet
{
/**
* Called by the VelocityServlet
* init(). We want to set a set of properties
* so that templates will be found in the webapp
* root. This makes this easier to work with as
* an example, so a new user doesn't have to worry
* about config issues when first figuring things
* out
*/
protected Properties loadConfiguration(ServletConfig config )
throws IOException, FileNotFoundException
{
Properties p = new Properties();
/*
* first, we set the template path for the
* FileResourceLoader to the root of the
* webapp. This probably won't work under
* in a WAR under WebLogic, but should
* under tomcat :)
*/
String path = config.getServletContext().getRealPath("/");
if (path == null)
{
System.out.println(" SampleServlet.loadConfiguration() : unable to "
+ "get the current webapp root. Using '/'. Please fix.");
path = "/";
}
p.setProperty( Velocity.FILE_RESOURCE_LOADER_PATH, path );
/**
* and the same for the log file
*/
p.setProperty( "runtime.log", path + "velocity.log" );
return p;
}
/**
* <p>
* main routine to handle a request. Called by
* VelocityServlet, your responsibility as programmer
* is to simply return a valid Template
* </p>
*
* @param ctx a Velocity Context object to be filled with
* data. Will be used for rendering this
* template
* @return Template to be used for request
*/
public Template handleRequest( HttpServletRequest request,
HttpServletResponse response, Context ctx )
{
/*
* set up some data to put into the context
*/
String p1 = "Bob";
String p2 = "Harold";
Vector personList = new Vector();
personList.addElement( p1 );
personList.addElement( p2 );
/*
* Add the list to the context.
* This is how it's passed to the template.
*/
ctx.put("theList", personList );
/*
* get the template. There are three possible
* exceptions. Good to know what happened.
*/
Template outty = null;
try
{
outty = getTemplate("sample.vm");
}
catch( ParseErrorException pee )
{
System.out.println("SampleServlet : parse error for template " + pee);
}
catch( ResourceNotFoundException rnfe )
{
System.out.println("SampleServlet : template not found " + rnfe);
}
catch( Exception e )
{
System.out.println("Error " + e);
}
return outty;
}
}
|
