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

1 /**
2  *
3  */
4 package com.b510.velocity.test;
5
6 import java.io.StringWriter;
7 import java.text.SimpleDateFormat;
8 import java.util.Date;
9
10 import org.apache.velocity.Template;
11 import org.apache.velocity.VelocityContext;
12 import org.apache.velocity.app.VelocityEngine;
13
14 import com.b510.velocity.bean.Mail;
15 import com.b510.velocity.bean.User;
16
17 /**
18  * 测试类
19  *
20  * @author hongten<br>
21  * @date 2013-3-9
22  */
23 public class VelocityTest {
24
25     public static final String HELLO_WORLD_VM_PATH = "vms/helloWorld.vm";
26     public static final String USER_INFO_VM_PATH = "vms/userInfo.vm";
27     public static final String EMAIL_TEMPLATE_VM_PATH = "vms/emailTemplate.vm";
28
29     public static void main(String[] args) throws Exception {
30         sayHelloFromVM(HELLO_WORLD_VM_PATH);
31         testUser(USER_INFO_VM_PATH);
32         testEmail(EMAIL_TEMPLATE_VM_PATH);
33     }
34
35     /**
36      * 简单的hello world
37      *
38      * @param fileVM
39      * @throws Exception
40      */
41     public static void sayHelloFromVM(String fileVM) throws Exception {
42         VelocityEngine ve = new VelocityEngine();
43         ve.init();
44         Template t = ve.getTemplate(fileVM);
45         VelocityContext context = new VelocityContext();
46         context.put("hello", "Hello world!!");
47         StringWriter writer = new StringWriter();
48         t.merge(context, writer);
49         System.out.println(writer.toString());
50     }
51
52     /**
53      * test User
54      *
55      * @param fileVM
56      * @throws Exception
57      */
58     public static void testUser(String fileVM) throws Exception {
59         VelocityEngine ve = new VelocityEngine();
60         ve.init();
61
62         Template template = ve.getTemplate(fileVM);
63         VelocityContext velocityContext = new VelocityContext();
64         User user = new User();
65         user.setEmail("hongtenzone@foxmail.com");
66         user.setName("hongten");
67         user.setBirthday("1990-11-18");
68         velocityContext.put("user", user);
69         StringWriter stringWriter = new StringWriter();
70         template.merge(velocityContext, stringWriter);
71
72         System.out.println(stringWriter.toString());
73     }
74
75     /**
76      * test email
77      *
78      * @param fileVM
79      * @throws Exception
80      */
81     public static void testEmail(String fileVM) throws Exception {
82         VelocityEngine velocityEngine = new VelocityEngine();
83         velocityEngine.init();
84
85         Template template = velocityEngine.getTemplate(fileVM);
86         VelocityContext velocityContext = new VelocityContext();
87         Mail mail = new Mail();
88         mail.setContent("2013年腾讯开发者新扶持政策解读及创业机会所在");
89         mail.setReceiverMail("hongtenzone@foxmail.com");
90         mail.setReceiverName("Hongten");
91         mail.setSenderMail("opensns_noreply@tencent.com");
92         mail.setSenderName("腾讯开放平台");
93         mail.setSenderWebSite("open.qq.com");
94         SimpleDateFormat simpleDateFormat = new SimpleDateFormat(
95                 "yyyy-MM-dd HH:mm:ss");
96         mail.setDate(simpleDateFormat.format(new Date()));
97         velocityContext.put("mail", mail);
98         StringWriter stringWriter = new StringWriter();
99         template.merge(velocityContext, stringWriter);
100
101         System.out.println(stringWriter.toString());
102     }
103 }

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

1 /**
2  *
3  */
4 package com.b510.velocity.bean;
5
6
7 /**
8  * 用户实体类
9  *
10  * @author hongten<br>
11  * @date 2013-3-9
12  */
13 public class User {
14
15     /**
16      * 用户编号
17      */
18     private Integer id;
19     /**
20      * 用户名称
21      */
22     private String name;
23     /**
24      * 密码
25      */
26     private String password;
27     /**
28      * 生日
29      */
30     private String birthday;
31     /**
32      * 邮箱
33      */
34     private String email;
35
36     public Integer getId() {
37         return id;
38     }
39
40     public void setId(Integer id) {
41         this.id = id;
42     }
43
44     public String getName() {
45         return name;
46     }
47
48     public void setName(String name) {
49         this.name = name;
50     }
51
52     public String getPassword() {
53         return password;
54     }
55
56     public void setPassword(String password) {
57         this.password = password;
58     }
59
60     public String getBirthday() {
61         return birthday;
62     }
63
64     public void setBirthday(String birthday) {
65         this.birthday = birthday;
66     }
67
68     public String getEmail() {
69         return email;
70     }
71
72     public void setEmail(String email) {
73         this.email = email;
74     }
75
76 }

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

1 /**
2  *
3  */
4 package com.b510.velocity.bean;
5
6 /**
7  * 邮件
8  *
9  * @author hongten<br>
10  * @date 2013-3-9
11  */
12 public class Mail {
13
14     private Integer id;
15     /**
16      * 发件人
17      */
18     private String senderName;
19     /**
20      * 发件人邮箱
21      */
22     private String senderMail;
23     /**
24      * 发件人网址
25      */
26     private String senderWebSite;
27     /**
28      * 收件人
29      */
30     private String receiverName;
31     /**
32      * 收件人邮箱
33      */
34     private String receiverMail;
35     /**
36      * 内容
37      */
38     private String content;
39     /**
40      * 日期
41      */
42     private String date;
43
44     public Integer getId() {
45         return id;
46     }
47
48     public void setId(Integer id) {
49         this.id = id;
50     }
51
52     public String getSenderName() {
53         return senderName;
54     }
55
56     public void setSenderName(String senderName) {
57         this.senderName = senderName;
58     }
59
60     public String getSenderMail() {
61         return senderMail;
62     }
63
64     public void setSenderMail(String senderMail) {
65         this.senderMail = senderMail;
66     }
67
68     public String getReceiverName() {
69         return receiverName;
70     }
71
72     public void setReceiverName(String receiverName) {
73         this.receiverName = receiverName;
74     }
75
76     public String getReceiverMail() {
77         return receiverMail;
78     }
79
80     public void setReceiverMail(String receiverMail) {
81         this.receiverMail = receiverMail;
82     }
83
84     public String getContent() {
85         return content;
86     }
87
88     public void setContent(String content) {
89         this.content = content;
90     }
91
92     public String getDate() {
93         return date;
94     }
95
96     public void setDate(String date) {
97         this.date = date;
98     }
99
100     public String getSenderWebSite() {
101         return senderWebSite;
102     }
103
104     public void setSenderWebSite(String senderWebSite) {
105         this.senderWebSite = senderWebSite;
106     }
107
108 }

/Apache-Velocity-java/vms/helloWorld.vm

1 ##test hello world!
2
3 $hello

/Apache-Velocity-java/vms/userInfo.vm

1 ##测试User
2
3 A: what's your name?
4 B: $user.name
5
6 A: what's your birthday?
7 B: $user.birthday
8
9 A: what's your email address?
10 B: $user.email
11
12 A: good!

/Apache-Velocity-java/vms/emailTemplate.vm

1 ##测试 email
2
3 $mail.senderName message notification
4 Sender       :   $mail.senderName<$mail.senderMail>
5 Date         :   $mail.date
6 Receiver     :   $mail.receiverName<$mail.receiverMail>
7
8 Dear $mail.receiverMail:
9 $mail.senderName send a message notification as following:
10
11 $mail.content
12
13 please quick login the $mail.senderWebSite message center and have a look.
14
15                                                       $mail.senderName Team
16

因为velocity源码中默认的编码为：

1 # ----------------------------------------------------------------------------
2 # T E M P L A T E  E N C O D I N G
3 # ----------------------------------------------------------------------------
4
5 input.encoding=ISO-8859-1
6 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：

1     VelocityEngine velocityEngine = new VelocityEngine();
2     velocityEngine.setProperty("input.encoding", "UTF-8");
3     velocityEngine.setProperty("output.encoding", "UTF-8");
4     velocityEngine.init();

这样就可以解决velocity的乱码问题啦...