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
