velocity与servlet的整合
?第一天学习velocity，参考别人的blog写了一个与Servlet结合的例子，写到下面以待备份
目录结构
俩实体类代码：
Department
?
package com.velocity.bean;
public class Department {
?private int id;
?private String deptname;
?public int getId() {
??return id;
?}
?public void setId(int id) {
??this.id = id;
?}
?public String getDeptname() {
??return deptname;
?}
?public void setDeptname(String deptname) {
??this.deptname = deptname;
?}
?public Department(int id, String deptname) {
??super();
??this.id = id;
??this.deptname = deptname;
?}
?public Department() {
??super();
?}
}
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package com.velocity.bean;
public class Employee {
?private int id;
?private String ename;
?private String eaddress;
?private int age;
?private Department department;
?public int getId() {
??return id;
?}
?public void setId(int id) {
??this.id = id;
?}
?public String getEname() {
??return ename;
?}
?public void setEname(String ename) {
??this.ename = ename;
?}
?public String getEaddress() {
??return eaddress;
?}
?public void setEaddress(String eaddress) {
??this.eaddress = eaddress;
?}
?public int getAge() {
??return age;
?}
?public void setAge(int age) {
??this.age = age;
?}
?public Department getDepartment() {
??return department;
?}
?public void setDepartment(Department department) {
??this.department = department;
?}
?public Employee(int id, String ename, String eaddress, int age,
???Department department) {
??super();
??this.id = id;
??this.ename = ename;
??this.eaddress = eaddress;
??this.age = age;
??this.department = department;
?}
?public Employee() {
?}
}
?
?
看SampleServlet类
?
package com.velocity.servlet;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.velocity.Template;
import org.apache.velocity.context.Context;
import org.apache.velocity.tools.view.servlet.VelocityViewServlet;
import com.velocity.bean.Department;
import com.velocity.bean.Employee;
@SuppressWarnings("serial")
public class SampleServlet extends VelocityViewServlet{
? //设置返回视图为text/html编码为gbk
??? @Override
??? protected void setContentType(HttpServletRequest request,
??????????? HttpServletResponse response) {
??????? response.setContentType("text/html;charset=utf-8");
??? }
???
??? //处理请求
??? @Override
??? protected Template handleRequest(HttpServletRequest request,
??????????? HttpServletResponse response, Context ctx){
??????? ctx.put("username", "张三");
??????? ctx.put("password", "123456789");
??????? ctx.put("age", "20");
??????? ctx.put("address", "北京");
??????? ctx.put("blog", "http://wcp88888888.iteye.com/");
???????
??????? List<Employee> list=new ArrayList<Employee>();
??????? list.add(new Employee(1,"张三","北京",18,new Department(1,"软件研发部1")));
??????? list.add(new Employee(2,"张三","北京",19,new Department(2,"软件研发部2")));
??????? list.add(new Employee(3,"张三","北京",20,new Department(3,"软件研发部3")));
??????? list.add(new Employee(4,"张三","北京",21,new Department(4,"软件研发部4")));
??????? list.add(new Employee(5,"张三","北京",22,new Department(5,"软件研发部5")));
??????? list.add(new Employee(6,"张三","北京",23,new Department(6,"软件研发部6")));
??????? list.add(new Employee(7,"张三","北京",24,new Department(7,"软件研发部7")));
??????? list.add(new Employee(8,"张三","北京",25,new Department(8,"软件研发部8")));
??????? list.add(new Employee(9,"张三","北京",26,new Department(9,"软件研发部9")));
??????? list.add(new Employee(10,"张三","北京",27,new Department(10,"软件研发部10")));
???????
??????? ctx.put("list", list);
??????? //调用父类的方法getTemplate()
??????? return getTemplate("demo.vm");
??? }
}
?
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继承org.apache.velocity.tools.view.servlet.VelocityViewServlet，覆写setContentType和handleRequest方法,其中setContentType用于设置浏览器的响应,handleRequest处理用户的请求,返回Template,我们调用父类中的getTemplate()方法返回
在WEB-INF目录下创建一vm目录,用于存放模板文件
在WEB-INF目录下创建velocity.properties(名字可以任意取)
内容为
resource.loader = webapp 加载方式为webapp
webapp.resource.loader.class = org.apache.velocity.tools.view.servlet.WebappLoader??? webapp方式加载处理类
webapp.resource.loader.path=/WEB-INF/vm/?? 模板文件目录
input.encoding="gbk"? 输入字符编码
output.encoding="gbk"? 输出字符编码
配置web.xml
?
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
?xmlns="http://java.sun.com/xml/ns/javaee"
?xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
?xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
?http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
? <welcome-file-list>
??? <welcome-file>index.jsp</welcome-file>
? </welcome-file-list>
?
? <servlet>
??????? <servlet-name>customerVelocityServlet</servlet-name>
??????? <servlet-class>com.velocity.servlet.SampleServlet</servlet-class>
??????? <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>customerVelocityServlet</servlet-name>
??????? <url-pattern>/customerVelocityServlet</url-pattern>
??? </servlet-mapping>
?
</web-app>
?
-----------------------------------------
<init-param>
???<param-name>org.apache.velocity.properties</param-name>
???<param-value>/WEB-INF/velocity.properties</param-value>
</init-param>
加载自定义的velocity.properties
demo.vm
http://localhost:8080/VelocityWeb/customerVelocityServlet
效果图
?
