Velocity中加载vm文件的三种方式

1Velocity中加载vm文件的三种方式
2
3velocitypropertiespath
4Velocity中加载vm文件的三种方式：
5 
6方式一：加载classpath目录下的vm文件
7Properties p = new Properties();
8p.put("file.resource.loader.class",
9"org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader");
10Velocity.init(p);
11...
12Velocity.getTemplate(templateFile);
13 
14 
15方式二：根据绝对路径加载，vm文件置于硬盘某分区中，如：d://tree.vm
16Properties p = new Properties();
17p.setProperty(VelocityEngine.FILE_RESOURCE_LOADER_PATH, "d://");
18Velocity.init(p);
19...
20Velocity.getTemplate("tree.vm");
21 
22 
23方式三：使用文本文件，如：velocity.properties，配置如下：
24#encoding
25input.encoding=UTF-8
26output.encoding=UTF-8
27contentType=text/html;charset=UTF-8
28不要指定loader.
29
30 
31再利用如下方式进行加载
32Properties p = new Properties();
33p.load(this.getClass().getResourceAsStream("/velocity.properties"));
34Velocity.init(p);
35...
36Velocity.getTemplate(templateFile);
37
38package com.study.volicity;
39
40import java.io.IOException;
41import java.io.StringWriter;
42import java.util.Properties;
43
44import org.apache.velocity.app.Velocity;
45import org.apache.velocity.Template;
46import org.apache.velocity.VelocityContext;
47
48public class Test {
49	
50
51	public static void main(String args[]) throws IOException {
52
53		Properties pros = new Properties();
54		pros.load(Test.class.getClassLoader().getResourceAsStream("velocity.properties"));
55		Velocity.init(pros);
56		VelocityContext context = new VelocityContext();
57
58		context.put("name", "Velocity");
59		context.put("project", "Jakarta");
60
61		/* lets render a template 相对项目路径 */
62		Template template = Velocity.getTemplate("/view/header.vm");
63
64		StringWriter writer = new StringWriter();
65
66		/* lets make our own string to render */
67		template.merge(context, writer);
68		System.out.println(writer);
69	}
70
71}