Java SpringWebFlow流媒体

我在SpringWebFlow/JSF应用程序中执行流操作（）时遇到问题。我已经看到一些人使用MVC控制器来解决这个问题，但我想使用它如下

我使用的是Tomcat 7.01、Spring WebFlow 2.3.1和Primefaces 4.0

问题是，当我想下载一个文件时，什么都没有发生。代码被执行，但在浏览器中什么也没发生。有人知道可能是什么问题吗，可能是xml中的其他设置

非常感谢

我的行为看起来像：

@Component
public class PrintCSVAction extends AbstractAction {
private static final String CSV_FILENAME = "export.csv";

public Event doExecute(RequestContext context) throws IOException {
        HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getNativeResponse();

        response.setHeader("Content-Disposition", "attachment; filename=\"" + CSV_FILENAME + "\"");
        OutputStream out = response.getOutputStream();
        response.setContentType("text/csv; charset=UTF-8");
        out.write(new String("blablablab\n").getBytes("utf-8"));
        out.flush();
        out.close();

        context.getExternalContext().recordResponseComplete();
        return success();
    }
}

<view-state id="search" view="export.xhtml">
    <transition on="home" to="finish" />
    <transition on="printCSV">
        <evaluate expression="printCSVAction" />
    </transition>
</view-state>

视图状态中的转换定义如下所示：

@Component
public class PrintCSVAction extends AbstractAction {
private static final String CSV_FILENAME = "export.csv";

public Event doExecute(RequestContext context) throws IOException {
        HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getNativeResponse();

        response.setHeader("Content-Disposition", "attachment; filename=\"" + CSV_FILENAME + "\"");
        OutputStream out = response.getOutputStream();
        response.setContentType("text/csv; charset=UTF-8");
        out.write(new String("blablablab\n").getBytes("utf-8"));
        out.flush();
        out.close();

        context.getExternalContext().recordResponseComplete();
        return success();
    }
}

<view-state id="search" view="export.xhtml">
    <transition on="home" to="finish" />
    <transition on="printCSV">
        <evaluate expression="printCSVAction" />
    </transition>
</view-state>

---

问题是p:commandLink默认使用ajax。要以非ajax方式提交表单，我们必须包含ajax=“false”或使用其他元素（例如，h:commandButton）

现在可以了

<p:commandLink action="printCSV" ajax="false">
    <p:graphicImage value="/css/images/csv.png" />
</p:commandLink>