首先，如果你对Velocity不是很了解，还是建议你去apache的官方网站上去走走....这是velocity的官网：http://velocity.apache.org/ 当然如果你对英文文档不是很感冒，这里也有好的资料： Velocity 文档(1)
Velocity 文档(2)
Velocity 文档(3) 下面我就正式说说我做的项目啦... 项目结构： 运行"helloWorld.vm"模板效果： 运行"userInfo.vm"模板效果： 运行"emailTemplate.vm"模板效果：

代码部分

测试代码： /** * */ package com.b510.velocity.test; import java.io.StringWriter; import java.text.SimpleDateFormat; import java.util.Date; import org.apache.velocity.Template; import org.apache.velocity.VelocityContext; import org.apache.velocity.app.VelocityEngine; import com.b510.velocity.bean.Mail; import com.b510.velocity.bean.User; /** * 测试类 * * @author hongten
* @date 2013-3-9 */ public class VelocityTest { public static final String HELLO_WORLD_VM_PATH = "vms/helloWorld.vm"; public static final String USER_INFO_VM_PATH = "vms/userInfo.vm"; public static final String EMAIL_TEMPLATE_VM_PATH = "vms/emailTemplate.vm"; public static void main(String[] args) throws Exception { sayHelloFromVM(HELLO_WORLD_VM_PATH); testUser(USER_INFO_VM_PATH); testEmail(EMAIL_TEMPLATE_VM_PATH); } /** * 简单的hello world * * @param fileVM * @throws Exception */ public static void sayHelloFromVM(String fileVM) throws Exception { VelocityEngine ve = new VelocityEngine(); ve.init(); Template t = ve.getTemplate(fileVM); VelocityContext context = new VelocityContext(); context.put("hello", "Hello world!!"); StringWriter writer = new StringWriter(); t.merge(context, writer); System.out.println(writer.toString()); } /** * test User * * @param fileVM * @throws Exception */ public static void testUser(String fileVM) throws Exception { VelocityEngine ve = new VelocityEngine(); ve.init(); Template template = ve.getTemplate(fileVM); VelocityContext velocityContext = new VelocityContext(); User user = new User(); user.setEmail("hongtenzone@foxmail.com"); user.setName("hongten"); user.setBirthday("1990-11-18"); velocityContext.put("user", user); StringWriter stringWriter = new StringWriter(); template.merge(velocityContext, stringWriter); System.out.println(stringWriter.toString()); } /** * test email * * @param fileVM * @throws Exception */ public static void testEmail(String fileVM) throws Exception { VelocityEngine velocityEngine = new VelocityEngine(); velocityEngine.init(); Template template = velocityEngine.getTemplate(fileVM); VelocityContext velocityContext = new VelocityContext(); Mail mail = new Mail(); mail.setContent("2013年腾讯开发者新扶持政策解读及创业机会所在"); mail.setReceiverMail("hongtenzone@foxmail.com"); mail.setReceiverName("Hongten"); mail.setSenderMail("opensns_noreply@tencent.com"); mail.setSenderName("腾讯开放平台"); mail.setSenderWebSite("open.qq.com"); SimpleDateFormat simpleDateFormat = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss"); mail.setDate(simpleDateFormat.format(new Date())); velocityContext.put("mail", mail); StringWriter stringWriter = new StringWriter(); template.merge(velocityContext, stringWriter); System.out.println(stringWriter.toString()); } }
实体代码： /** * */ package com.b510.velocity.bean; /** * 用户实体类 * * @author hongten
* @date 2013-3-9 */ public class User { /** * 用户编号 */ private Integer id; /** * 用户名称 */ private String name; /** * 密码 */ private String password; /** * 生日 */ private String birthday; /** * 邮箱 */ private String email; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getBirthday() { return birthday; } public void setBirthday(String birthday) { this.birthday = birthday; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } } /** * */ package com.b510.velocity.bean; /** * 邮件 * * @author hongten
* @date 2013-3-9 */ public class Mail { private Integer id; /** * 发件人 */ private String senderName; /** * 发件人邮箱 */ private String senderMail; /** * 发件人网址 */ private String senderWebSite; /** * 收件人 */ private String receiverName; /** * 收件人邮箱 */ private String receiverMail; /** * 内容 */ private String content; /** * 日期 */ private String date; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getSenderName() { return senderName; } public void setSenderName(String senderName) { this.senderName = senderName; } public String getSenderMail() { return senderMail; } public void setSenderMail(String senderMail) { this.senderMail = senderMail; } public String getReceiverName() { return receiverName; } public void setReceiverName(String receiverName) { this.receiverName = receiverName; } public String getReceiverMail() { return receiverMail; } public void setReceiverMail(String receiverMail) { this.receiverMail = receiverMail; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public String getDate() { return date; } public void setDate(String date) { this.date = date; } public String getSenderWebSite() { return senderWebSite; } public void setSenderWebSite(String senderWebSite) { this.senderWebSite = senderWebSite; } }
/Apache-Velocity-java/vms/helloWorld.vm ##test hello world! $hello
/Apache-Velocity-java/vms/userInfo.vm ##测试User A: what's your name? B: $user.name A: what's your birthday? B: $user.birthday A: what's your email address? B: $user.email A: good!
/Apache-Velocity-java/vms/emailTemplate.vm ##测试 email $mail.senderName message notification Sender : $mail.senderName<$mail.senderMail> Date : $mail.date Receiver : $mail.receiverName<$mail.receiverMail> Dear $mail.receiverMail: $mail.senderName send a message notification as following: $mail.content please quick login the $mail.senderWebSite message center and have a look. $mail.senderName Team
因为velocity源码中默认的编码为"ISO-8859-1"：   # ---------------------------------------------------------------------------- # T E M P L A T E E N C O D I N G # ---------------------------------------------------------------------------- input.encoding=ISO-8859-1 output.encoding=ISO-8859-1   所以，如果出现乱码我们可以设置velocity的编码格式： VelocityEngine velocityEngine = new VelocityEngine(); velocityEngine.setProperty("input.encoding", "UTF-8"); velocityEngine.setProperty("output.encoding", "UTF-8"); velocityEngine.init(); 这样就可以解决velocity的乱码问题啦...   源码下载：http://files.cnblogs.com/hongten/Apache-Velocity-java.rar 文章来源：http://www.cnblogs.com/hongten/archive/2013/03/09/hongten_apache_velocity.html