在spring mvc3.2及以上版本增加了对请求的异步处理，是在servlet3的基础上进行封装的。

1、修改web.xml

<?xml version="1.0" encoding="UTF-8"?>

http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">...

1.1、声明version="3.0"，声明web-app_3_0.xsd

1.2、为servlet或者filter设置启用异步支持：true，修改WEB应用的web.xml

SpringMvc

org.springframework.web.servlet.DispatcherServlet

contextConfigLocation

...

1

true

2、使controller类支持async

2.1、返回java.util.concurrent.Callable来完成异步处理

packageorg.springframework.samples.mvc.async;importjava.util.concurrent.Callable;importorg.springframework.stereotype.Controller;importorg.springframework.ui.Model;importorg.springframework.web.bind.annotation.ExceptionHandler;importorg.springframework.web.bind.annotation.RequestMapping;importorg.springframework.web.bind.annotation.RequestParam;importorg.springframework.web.bind.annotation.ResponseBody;importorg.springframework.web.context.request.async.WebAsyncTask;

@Controller

@RequestMapping("/async/callable")public classCallableController {

@RequestMapping("/response-body")public @ResponseBody Callablecallable() {return new Callable() {

@Overridepublic String call() throwsException {

Thread.sleep(2000);return "Callable result";

}

};

}

@RequestMapping("/view")public Callable callableWithView(finalModel model) {return new Callable() {

@Overridepublic String call() throwsException {

Thread.sleep(2000);

model.addAttribute("foo", "bar");

model.addAttribute("fruit", "apple");return "views/html";

}

};

}

@RequestMapping("/exception")public @ResponseBody CallablecallableWithException(final @RequestParam(required=false, defaultValue="true") booleanhandled) {return new Callable() {

@Overridepublic String call() throwsException {

Thread.sleep(2000);if(handled) {//see handleException method further below

throw new IllegalStateException("Callable error");

}else{throw new IllegalArgumentException("Callable error");

}

}

};

}

@RequestMapping("/custom-timeout-handling")public @ResponseBody WebAsyncTaskcallableWithCustomTimeoutHandling() {

Callable callable = new Callable() {

@Overridepublic String call() throwsException {

Thread.sleep(2000);return "Callable result";

}

};return new WebAsyncTask(1000, callable);

}

@ExceptionHandler

@ResponseBodypublicString handleException(IllegalStateException ex) {return "Handled exception: " +ex.getMessage();

}

}

2.2、在异步处理完成时返回org.springframework.web.context.request.async.DeferredResult其他线程，例如一个JMS或一个AMQP消息,Redis通知等等：

@RequestMapping("/quotes")

@ResponseBodypublic DeferredResultquotes() {

DeferredResult deferredResult = new DeferredResult();//Add deferredResult to a Queue or a Map...

returndeferredResult;

}//In some other thread...

deferredResult.setResult(data);//Remove deferredResult from the Queue or Map

3、spring配置文件的修改

spring mvc的dtd的声明必须大于等于3.2

原文：http://www.cnblogs.com/yangzhilong/p/3725128.html