定时任务

最新推荐文章于 2025-03-06 11:46:57 发布

原创最新推荐文章于 2025-03-06 11:46:57 发布 · 390 阅读

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原理：分析

建立一个包

com.rl.server

建立一个线程类

public clas TimeoutService implements Runnables{
	public void run(){
		try {	
			Thread.sleep(1000);//一秒执行一次
		}catch(InterruptedException e){
			e.printStackTrace();	
		}
	}
}

因为总体要考虑数据库所以要结合Springbean

在console 中建立一个

service 叫做 TimeoutServlet,因为是定时器说以是在service 初始化的时候建立的即init的方法

加载web.xml更改配置让他随着服务器的启动而启动

<servlet>
		<description>
		</description>
		<display-name>TimeoutServlet</display-name>
		<servlet-name>TimeoutServlet</servlet-name>
		<servlet-class>com.rl.servlet.TimeoutServlet</servlet-class>
		<load-on-startup>2</load-on-startup>
	</servlet>

<pre name="code" class="html"><servlet-mapping>
		<servlet-name>TimeoutServlet</servlet-name>
		<url-pattern>/TimeoutServlet</url-pattern>
	</servlet-mapping>

TimeoutServlet.java

package com.rl.servlet;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;

import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;

import com.rl.server.TimeoutServer;

/**
 * Servlet implementation class TimeoutServlet
 */
public class TimeoutServlet extends HttpServlet {
	@Override
	public void init(ServletConfig config) throws ServletException {
		WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(config.getServletContext());
		new Thread(new TimeoutServer(ctx)).start();
	}
}

实现

原理：分析

建立一个包

com.rl.server

建立一个线程类

public clas TimeoutService implements Runnables{
	public void run(){
		try {	
			Thread.sleep(1000);//一秒执行一次
		}catch(InterruptedException e){
			e.printStackTrace();	
		}
	}
}

因为总体要考虑数据库所以要结合Springbean

在console 中建立一个

service 叫做 TimeoutServlet,因为是定时器说以是在service 初始化的时候建立的即init的方法

加载web.xml更改配置让他随着服务器的启动而启动

<servlet>
		<description>
		</description>
		<display-name>TimeoutServlet</display-name>
		<servlet-name>TimeoutServlet</servlet-name>
		<servlet-class>com.rl.servlet.TimeoutServlet</servlet-class>
		<load-on-startup>2</load-on-startup>
	</servlet>

<pre name="code" class="html"><servlet-mapping>
		<servlet-name>TimeoutServlet</servlet-name>
		<url-pattern>/TimeoutServlet</url-pattern>
	</servlet-mapping>

TimeoutServlet.java

<p>原理：分析</p><p>建立一个包</p><p>com.rl.server</p><p>建立一个线程类</p><p></p><pre name="code" class="java">public clas TimeoutService implements Runnables{
	public void run(){
		try {	
			Thread.sleep(1000);//一秒执行一次
		}catch(InterruptedException e){
			e.printStackTrace();	
		}
	}
}

因为总体要考虑数据库所以要结合Springbean

在console 中建立一个

service 叫做 TimeoutServlet,因为是定时器说以是在service 初始化的时候建立的即init的方法

加载web.xml更改配置让他随着服务器的启动而启动

<servlet>
		<description>
		</description>
		<display-name>TimeoutServlet</display-name>
		<servlet-name>TimeoutServlet</servlet-name>
		<servlet-class>com.rl.servlet.TimeoutServlet</servlet-class>
		<load-on-startup>2</load-on-startup>
	</servlet>

<pre name="code" class="html"><servlet-mapping>
		<servlet-name>TimeoutServlet</servlet-name>
		<url-pattern>/TimeoutServlet</url-pattern>
	</servlet-mapping>

TimeoutServlet.java

package com.rl.server;

import java.util.Date;

import org.springframework.context.ApplicationContext;

import com.rl.service.EbOrderService;

public class TimeoutServer implements Runnable {
	
	public TimeoutServer(ApplicationContext ctx){<span style="white-space:pre">	</span>//构造器
		this.ctx = ctx;
		orderService = (EbOrderService) ctx.getBean("ebOrderServiceImpl");
	}
	
	ApplicationContext ctx;
	
	EbOrderService orderService;

	public void run() {
		
		while(true){
			try {
				long times = new Date().getTime() - 30*1000;
				orderService.listTimeoutOrder(new Date(times) , "noPaidOrderer");
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}

	}

}