Struts2文件的下载

学习下使用Struts2文件的下载
这里也有个简单的例子
http://tailsherry.iteye.com/blog/178351

下面是个官方demo

Action

public class FileDownloadAction implements Action {

    private String inputPath;
    public void setInputPath(String value) {
        inputPath = value;
    }

    public InputStream getInputStream() throws Exception {
        return ServletActionContext.getServletContext().getResourceAsStream(inputPath);
    }

    public String execute() throws Exception {
        return SUCCESS;
    }
}

配置文件

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

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
	<package name="filedownload" extends="struts-default" namespace="/filedownload">

        <default-action-ref name="download"/>

        <action name="download" class="org.apache.struts2.showcase.filedownload.FileDownloadAction">
<!--个人认为param是从ValueStack里取值，但不知道能否在配置文件里往ValueStack设值 --!>
            <param name="inputPath">/images/struts.gif</param>
			<result name="success" type="stream">
                <param name="contentType">image/gif</param>
                <param name="inputName">inputStream</param>
                <param name="contentDisposition">filename="struts.gif"</param>
                <param name="bufferSize">4096</param>
            </result>
        </action>

        <action name="download2" class="org.apache.struts2.showcase.filedownload.FileDownloadAction">
            <param name="inputPath">/images/struts-gif.zip</param>
            <result name="success" type="stream">
                <param name="contentType">application/zip</param>
                <param name="inputName">inputStream</param>
                <param name="contentDisposition">filename="struts-gif.zip"</param>
                <param name="bufferSize">4096</param>
            </result>
        </action>

    </package>
</struts>

配置文件中的param 元素可以参照上面连接那个例子