struts2图片显示

struts2图片显示即是文件下载

一、配置struts.xml

        struts.xml中配置stream结果类型，并配置contentType、inputName、contentDisposition、bufferSize参数即可

<action name="readImgAction" class="com.bk.eserver.web.action.ImgAction" method="readImg" >
	<result type="stream">
		<param name="contentType">application/octet-stream</param>
		<param name="inputName">inputStream</param>
		 <param name="contentDisposition">attachment;filename=${fileName}</param>  
		<param name="bufferSize">4096</param>
	</result>
</action>

二、ImgAction

public class ImgAction extends WebSupport {
	private InputStream inputStream;  

	/**
	 * 读取图片
	 * 
	 * @return
	 */
	public String readImg() {
		try {
			inputStream = new FileInputStream(new File("D:\meinv.jpg"));
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} 
		return SUCCESS;
	}
	
	public InputStream getInputStream() {
		return inputStream;
	}

	public void setInputStream(InputStream inputStream) {
		this.inputStream = inputStream;
	}

}

三、要显示图片的JSP

<img  src="admin/readImgAction.do">

恩，页面上将显示如下：