Velocity原理

1、准备

添加引用：velocity-1.7.jar，velocity-tools-2.0.jar，commons-beanutils-1.7.0.jar，commons-chain-1.1.jar，commons-codec-1.6.jar，commons-collections-3.1.jar，commons-dbcp-1.4.jar，commons-digester-1.8.jar，commons-discovery-0.2.jar，commons-fileupload-1.2.2.jar，commons-io-2.0.1.jar，commons-lang-2.6.jar，commons-logging-1.1.3.jar，commons-net-3.0.1.jar，commons-pool-1.5.5.jar

2、创建展示文件 hellosite.vm

内容：Hello $name! Welcome to $site world!

3、添加处理文件

package nankang.test;

import java.io.StringWriter;

import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;

public class Main {

    /**
     * @param args
     */
    public static void main(String[] args) {
        try {
            VelocityEngine ve = new VelocityEngine();
            ve.init();

            Template t = ve.getTemplate("hellosite.vm");
            VelocityContext context = new VelocityContext();
            context.put("name", "aaaaa");
            context.put("site", "htt://www.baidu1.com");
            StringWriter writer = new StringWriter();
            t.merge(context, writer);

            System.out.println(writer.toString());

            System.out.println("成功");
        } catch (Exception e) {
            System.out.println(String.format("失败，%s", e.getMessage()));
        }
    }

}