apache的开源项目-模板引擎(Velocity)_学习了两天就上手啦_源码下载

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：

==============================================================

/Apache-Velocity-java/src/com/b510/velocity/test/VelocityTest.java

/**
*
*/
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<br>
* @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());
}
}

/Apache-Velocity-java/src/com/b510/velocity/bean/User.java

/**
*
*/
package com.b510.velocity.bean;

/**
* 用户实体类
*
* @author hongten<br>
* @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;
}

}

/Apache-Velocity-java/src/com/b510/velocity/bean/Mail.java

/**
*
*/
package com.b510.velocity.bean;

/**
* 邮件
*
* @author hongten<br>
* @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：

# ----------------------------------------------------------------------------
# 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