日期:2014-05-16 浏览次数:20389 次
<servlet> <servlet-name>velocity</servlet-name> <servlet-class> org.apache.velocity.tools.view.servlet.VelocityViewServlet</servlet-class> <init-param> <param-name>org.apache.velocity.toolbox</param-name> <param-value>/WEB-INF/tools.xml</param-value> </init-param> <init-param> <param-name>org.apache.velocity.properties</param-name> <param-value>/WEB-INF/velocity.properties</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>velocity</servlet-name> <url-pattern>*.vm</url-pattern> </servlet-mapping>
<?xml version="1.0"?> <!-- key表示vm引用的对象名称,该名称必须是唯一的 scope表示对象的生命周期,其可以设置的值为:request,session,application。request-path假如scope设置为request,该对象是为那一个servlet使用的,request-path的命名最后需要加上允许访问的路径,这是必须的 class表示对应的实现类 --> <toolbox> <data type="string"> <key>userList</key> <value>用户列表</value> </data> <tool> <key>userService</key> <scope>request</scope> <request-path>/user/*</request-path> <!-- /user/路径可以访问 --> <class>demo.service.UserService</class> </tool> </toolbox>
package demo.model; public class User { private int id; private String name; private int age; public User(int id, String name, int age) { this.id = id; this.name = name; this.age = age; } public int getAge() { return age; } public int getId() { return id; } public String getName() { return name; } } package demo.service; import java.util.ArrayList; import java.util.List; import demo.model.User; public class UserService { static private List<User> users = new ArrayList<User>(); static { for (int i = 0; i < 10; i++) { users.add(new User(i, "name" + i, i + 3)); } } public List<User> listUsers() { return users; } public User getUser(int id) { for (User user : users) { if (user.getId() == id) return user; } return null; } public int parseInt(String id){ return Integer.parseInt(id); } }
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=GBK"> <title>$userList</title> </head> <body> <table width="50%"> <tr bgcolor="#FFFFFF"> <th>姓名</th> <th>年龄</th> </tr> #foreach($user in ${userService.listUsers()}) <tr bgcolor="#FFFFFF"> <td><a href="user.vm?id=${user.getId()}">${user.getName()}</a></td> <td align="center">${user.getAge()}</td> </tr> #end </table> </body> </html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=GBK"> <title>$userList</title> </head> <body> #set($id = $request.getParameter("id")) $id <table> <tr> <td> 姓名</td> <td>年龄</td> </tr> #set( $user=${userService.getUser($userService.parseInt($id))} ) <tr> <td>${user.getName()}</td> <td>${user.getAge()}</td> <tr> </table> </body> </html>