Tomcat7实现Servlet3异步请求

pom.xml：
 
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<dependency>
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    <groupId>javax.servlet</groupId>
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    <artifactId>javax.servlet-api</artifactId>
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    <version>3.0.1</version>
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    <scope>provided</scope>
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</dependency>
web.xml：
 
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<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
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    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
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    <display-name>Servlet3-Demo</display-name>
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</web-app>
AsyncServlet：
 
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@WebServlet(value = "/async-demo", asyncSupported = true)
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public class AsyncServlet extends HttpServlet {
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    ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(2);
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    public void doGet(HttpServletRequest req, HttpServletResponse res) {
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        AsyncContext aCtx = req.startAsync(req, res);
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        executor.execute(new AsyncHandler(aCtx));
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    }
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}
AsyncHandler：
 
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public class AsyncHandler implements Runnable {
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    private AsyncContext ctx;
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    public AsyncHandler(AsyncContext ctx) {
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        this.ctx = ctx;
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    }
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    @Override
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    public void run() {
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        System.out.println("Dispatch Time: " + System.currentTimeMillis());
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        ctx.dispatch("/index.jsp");
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    }
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}


摘自 Neron.L的博客