本文介绍如何使用Quartz和Freemarker在Web环境中实现定时任务及网页静态化功能，通过Maven项目配置、依赖管理、Spring整合、定时任务调度等步骤，详细阐述了整个实现过程。
Web 环境中设计定时器，需要借助quartz包的支持，本文介绍如何借助quartz和freemarker实现网页静态化的功能
一、新建Maven项目
配置pom.xml文件
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.test</groupId>
<artifactId>freemarkerweb</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>freemarkerweb Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<junit.version>4.12</junit.version>
<spring.version>4.3.7.RELEASE</spring.version>
<jackson.version>2.8.7</jackson.version>
<jstl.version>1.2</jstl.version>
<commons-logging.version>1.1.3</commons-logging.version>
<log4j.version>1.2.14</log4j.version>
<freemarker.version>2.3.23</freemarker.version>
<mybatis.version>3.2.8</mybatis.version>
<mybatis.spring.version>1.2.2</mybatis.spring.version>
<mysql.version>5.1.32</mysql.version>
<druid.version>1.0.29</druid.version>
<commons.io.version>2.3</commons.io.version>
<commons.fileupload>1.3.1</commons.fileupload>
<servlet-api.version>3.0.1</servlet-api.version>
</properties>
<dependencies>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>${commons-logging.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons.io.version}</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>${commons.fileupload}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet-api.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>${freemarker.version}</version>
</dependency>
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>2.3.0</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
</dependencies>
<build>
<finalName>freemarkerweb</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<port>8080</port>
<path>/</path>
</configuration>
</plugin>
</plugins>
</build>
</project>
Spring.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:rabbit="http://www.springframework.org/schema/rabbit"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/rabbit
http://www.springframework.org/schema/rabbit/spring-rabbit.xsd">
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- Spring为什么要整合Mybatis ？ -->
<!-- 1.Spring帮助Mybatis管理事务 -->
<!-- 2.SqlSession是由SqlSessionFactory来创建的，SqlSessionFactory是一个重量级
管理SqlSessionFactory
3.整合映射文件xml，自动映射接口，生成代理
-->
<!-- 数据源 -->
<bean id="ds" class="com.alibaba.druid.pool.DruidDataSource">
<property name="url" value="${jdbc.url}"></property>
<property name="driverClassName" value="${jdbc.driver}"></property>
<property name="username" value="${jdbc.uname}"></property>
<property name="password" value="${jdbc.pwd}"></property>
</bean>
<!-- Session工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:SqlMapConfig.xml"/>
<property name="dataSource" ref="ds"></property>
<!-- 给实体类取别名 -->
<property name="typeAliasesPackage" value="com.test.bean"></property>
</bean>
<!-- 接口代理 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
<property name="basePackage" value="com.test.mapper"></property>
</bean>
<!-- 事务管理器 -->
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" >
<property name="dataSource" ref="ds"></property>
</bean>
<!-- 哪些方法需要事务处理 -->
<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<tx:method name="insert*"/>
<tx:method name="add*"/>
<tx:method name="save*"/>
<tx:method name="update*"/>
<tx:method name="upd*"/>
<tx:method name="modify*"/>
<tx:method name="delete*"/>
<tx:method name="del*"/>
<tx:method name="get*" read-only="true"/>
<tx:method name="find*" read-only="true"/>
<tx:method name="select*" read-only="true"/>
</tx:attributes>
</tx:advice>
<!-- 事务切面 -->
<aop:config>
<aop:pointcut expression="execution(* com.test.service.impl.*.*(..))" id="pc"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="pc"/>
</aop:config>
<!-- 扫描service -->
<context:component-scan base-package="com.test.service.impl"></context:component-scan>
<!-- 执行的任务的对象 -->
<bean id="myTask" class="com.test.service.impl.MyTask" />
<!-- 调度对象 -->
<bean id="schedulerBean"
class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
<property name="targetObject">
<ref bean="myTask" /> <!-- 注入任务对象 -->
</property>
<property name="targetMethod">
<value>doTask</value> <!-- 调用任务对象的方法 -->
</property>
<property name="concurrent" value="false" />
</bean>
<!-- 根据定时表达式触发调用 -->
<bean id="schedulerCronTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">
<property name="jobDetail">
<ref bean="schedulerBean"/>
</property>
<property name="cronExpression">
<value>0/5 * * * * ?</value> <!-- 从0秒开始，每5秒触发一次 -->
</property>
</bean>
<!-- 工厂对象 -->
<bean id="schedulerFactoryBean"
class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<list>
<ref bean="schedulerCronTrigger" />
</list>
</property>
</bean>
<import resource="classpath*:/springmvc.xml"/>
</beans>
Cron表达式,至少设置６个，第７个可选
[秒] [分] [时] [每月中哪天] [月] [每星期中哪天] [年]
[秒] 可以用数字0－59 表示
[分] 可以用数字0－59 表示
[时] 可以用数字0-23表示
[每月中哪天] 可以用数字1-31 中的任一一个值
[月] 可以用0-11 或用字符串 “JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV and DEC” 表示
[每星期中哪天] 可以用数字1-7表示（1 ＝ 星期日）或用字符口串“SUN, MON, TUE, WED, THU, FRI and SAT”表示
[年] 可选
由于[每月中哪天]与[每星期中哪天]的设置冲突，所以其中之一必须设置为？
“/”：为特别单位，表示为“每”如“0/15”表示每隔15分钟执行一次,“0”表示为从“0”分开始, “3/20”表示表示每隔20分钟执行一次，“3”表示从第3分钟开始执行
“?”：表示每月的某一天，或第周的某一天
“L”：用于每月，或每周，表示为每月的最后一天，或每个月的最后星期几如“6L”表示“每月的最后一个星期五”
“W”：表示为最近工作日，如“15W”放在每月（day-of-month）字段上表示为“到本月15日最近的工作日”
““#”：是用来指定“的”每月第n个工作日,例 在每周（day-of-week）这个字段中内容为"6#3" or “FRI#3” 则表示“每月第三个星期五”
例程
每星期的每一天每隔10秒执行一次：*/10 * * * * ?
每星期的每一天每隔２分钟执行一次：0 */２ * * * ?
每星期的每一天每天23点执行一次：0 0 23 * * ?
每星期的每一天每天凌晨1点执行一次：0 0 1 * * ?
每星期的每一天每小时在10分、20分、30分执行一次：0 10,20,30 * * * ?
任务类
package com.test.service.impl;
import java.sql.Timestamp;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import com.test.bean.GoodInfo;
import com.test.freemarker.FRUtil;
import com.test.service.GoodsService;
public class MyTask {
@Autowired
private GoodsService gService;
public void doTask() {
try
{
List<GoodInfo> gList = gService.findGoods();
Map<String, Object> map = new HashMap<>();
map.put("gList", gList);
FRUtil.createStaticHtml("glist.ftl", map, "glist.html");
System.out.println("gList==="+gList);
System.out.println("doTask === "+new Timestamp(System.currentTimeMillis()));
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
FRUtil工具类
package com.test.freemarker;
import java.io.File;
import java.io.FileWriter;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;
import freemarker.cache.ClassTemplateLoader;
import freemarker.ext.dom.NodeModel;
import freemarker.template.Configuration;
import freemarker.template.Template;
public class FRUtil {
public static void createStaticHtml(String tmptFile,Map map,String htmlFile)
{
try
{
Configuration cfg = new Configuration(Configuration.VERSION_2_3_23);
//获取Web工程根目录
String webRoot = System.getProperty("webroot");
cfg.setDirectoryForTemplateLoading(new File(webRoot+"/WEB-INF/ftl"));
cfg.setDefaultEncoding("utf-8");
Template t1 = cfg.getTemplate("test.ftl");
//生成静态页面
String file = webRoot + "/" + htmlFile;
FileWriter fw = new FileWriter(file);
t1.process(map, fw);
}
catch(Exception e)
{
e.printStackTrace();
}
}
}
模板文件
<html>
<head>First freemarker demo</head>
<body>
<table border=1>
<#list gList as g>
<tr>
<td>${g.id}</td>
<td>${g.name}</td>
<td>${g.dt}</td>
<td>${g.price}</td>
</tr>
</#list>
</table>
</body>
</html>
Web.xml配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>easyuiProj</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>webAppRootKey</param-name>
<param-value>webroot</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.util.WebAppRootListener</listener-class>
</listener>
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 字符编码过滤器 -->
<filter>
<filter-name>cFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>cFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
Tomcat后台
前台输出
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