根据资源url下载资源到指定路径

o_oand0_0 — Fri, 21 Oct 2011 07:43:00 GMT

import java.net.*;
import java.io.*;

1public void downLoadFile(String srcUri, String destPath) {
2        FileOutputStream fos = null;
3        BufferedInputStream bis = null;
4        HttpURLConnection httpUrl = null;
5        URL url = null;
6        int bsize = 1024;
7
8        byte[] buf = new byte[bsize];
9        int size = 0;
10        try {
11            url = new URL(srcUri);
12            httpUrl = (HttpURLConnection) url.openConnection();
13            httpUrl.connect();
14            bis = new BufferedInputStream(httpUrl.getInputStream());
15
16            fos = new FileOutputStream(destPath);
17            while ((size = bis.read(buf)) != -1) {
18                fos.write(buf, 0, size);
19            }
20            fos.flush();
21        } catch (IOException e) {
22        } catch (ClassCastException e) {
23        } finally {
24            try {
25                fos.close();
26                bis.close();
27                httpUrl.disconnect();
28            } catch (IOException e) {
29            } catch (NullPointerException e) {
30            }
31        }
32    }

测试:

downLoadFile("http://www.baidu.com/img/baidu_sylogo1.gif","c:\\baidu_sylogo1.gif");

o_oand0_0 2011-10-21 15:43 发表评论

基于spring+quartz开发定时器

o_oand0_0 — Fri, 21 Oct 2011 07:27:00 GMT

1、准备Jar包
在Spring所有包齐全的前提下还要导入一个定时器工具包：quartz-1.6.2.jar <http://www.opensymphony.com/quartz/download.action>
2、开发定时器类，实例代码如下：

1public class TriggerUtil {
2
3    private TriggerUtil(){
4
5    }
6
7    public void expDataBase(){
8        System.out.println("trigger actived..");
9    }
10
11}

3、配置定时任务
为了清晰代码结构，单独建立一个配置定时任务的配置文件context-trigger.xml，并在applicationContext.xml进行import：

context-trigger.xml内容如下：

1xml version="1.0" encoding="UTF-8"?>
2<beans
3    xmlns="http://www.springframework.org/schema/beans"
4    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
5    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
6
7
8  <bean id="triggerUtil" class="com.pro.base.util.TriggerUtil" >
9  bean>
10
11  <bean id="expDataBaseJob"
12      class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
13      <property name="targetObject">
14          <ref local="triggerUtil" />
15      property>
16      <property name="targetMethod">
17          <value>expDataBasevalue>
18      property>
19  bean>
20
21  <bean id="expDataBaseTrigger"
22      class="org.springframework.scheduling.quartz.CronTriggerBean">
23      <property name="jobDetail">
24          <ref local="expDataBaseJob" />
25      property>
26      <property name="cronExpression">
27          <value>00 33 21 * * ?value>
28      property>
29      bean>
30
31      <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
32        <property name="triggers">
33            <list>
34                <ref local="expDataBaseTrigger" />
35            list>
36        property>
37    bean>
38beans>

附：定时时间配置说明

Expression	Meaning
0 0 12 * * ?	每天中午12点触发【Fire at 12pm (noon) every day 】
0 15 10 ? * *	每天上午10:15触发【Fire at 10:15am every day 】
0 15 10 * * ?	每天上午10:15触发【Fire at 10:15am every day 】
0 15 10 * * ? *	每天上午10:15触发【Fire at 10:15am every day 】
0 15 10 * * ? 2005	在2005这一年中每天上午10:15触发【Fire at 10:15am every day during the year 2005 】
0 * 14 * * ?	每天下午14:00到15:00之间，每1分钟触发一次【Fire every minute starting at 2pm and ending at 2:59pm, every day 】
0 0/5 14 * * ?	每天下午14:00到14:55之间，每5分钟触发一次【Fire every 5 minutes starting at 2pm and ending at 2:55pm, every day 】
0 0/5 14,18 * * ?	每天的14:00~14:55和18:00~18:55之间，每5分钟触发一次【Fire every 5 minutes starting at 2pm and ending at 2:55pm, AND fire every 5 minutes starting at 6pm and ending at 6:55pm, every day 】
0 0-5 14 * * ?	每天的14:00~14:05之间，每1分钟触发一次【Fire every minute starting at 2pm and ending at 2:05pm, every day 】
0 10,44 14 ? 3 WED	3月的每周三的14:10和14:44触发【Fire at 2:10pm and at 2:44pm every Wednesday in the month of March. 】
0 15 10 ? * MON-FRI	每周周一到周五的10:15触发【Fire at 10:15am every Monday, Tuesday, Wednesday, Thursday and Friday 】
0 15 10 15 * ?	每月15日的10:15触发【 Fire at 10:15am on the 15th day of every month 】
0 15 10 L * ?	每月最后一天的10:15触发【Fire at 10:15am on the last day of every month 】
0 15 10 ? * 6L	每月的最后一个周五的10:15触发【Fire at 10:15am on the last Friday of every month 】
0 15 10 ? * 6L 2002-2005	在2002到2005之间，每月的最后一个周五的10:15触发【Fire at 10:15am on every last friday of every month during the years 2002, 2003, 2004 and 2005 】
0 15 10 ? * 6#3	每月的第三个星期五的10:15触发【Fire at 10:15am on the third Friday of every month 】

o_oand0_0 2011-10-21 15:27 发表评论

BlogJava-o_oand0_0-文章分类-J2EE应用开发

根据资源url下载资源到指定路径

基于spring+quartz开发定时器