struts2文件上传

标签：struts2.0   文件上传   表单   

1、实现struts2的文件上传，首先把表单form的enctype属性设置为：multipart/form-data

<form action="FileUpload" method="post" enctype="multipart/form-data">
			文件标题:<input name="title" type="text" /><br>
			文件:<input name="upload" type="file"/><br>
			<input type="submit" value="上传" />
		</form>

action类为：

public class FileUploadAction {
	private String title;
	private File upload;
	private String uploadFileName;
	private String uploadContentType;
	private String savePath;             （getter/setter）
public String execute() throws Exception {
		System.out.println("path:" + getSavePath());
		System.out.println("filename:" + getUploadFileName());
		String path = ServletActionContext.getServletContext().getRealPath(getSavePath());// 相对路径
		try {
			FileOutputStream fos = new FileOutputStream(path + "\\" + getUploadFileName());
			byte[] buffer = new byte[1024];
			int len;
			FileInputStream fis = new FileInputStream(getUpload());
			while ((len = fis.read(buffer)) > 0) {
				fos.write(buffer, 0, len);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return "success";
	}
}

String path = ServletActionContext.getServletContext().getRealPath(getSavePath());

FileOutputStream fos = new FileOutputStream(<span style="font-family: Arial, Helvetica, sans-serif;">getSavePath()</span> + "\\" + getUploadFileName());

3、添加上传成功后转向的页面

上传成功！
		<br>
		文件标题：
		<s:property value="title" />
		<br />
		文件为：
		<img src="<s:property value="'upload/'+uploadFileName"/>" />
		<br />

4、最后是配置action

<action name="FileUpload" class="com.demo.action.FileUploadAction">
			<!-- 动态设置action属性值 -->
		    <param name="savePath">/upload</param>
			<result name="success">/demo/jsp/uploadSuccess.jsp</result>
		</action>

5、最后在web.xml里配置一个Filter，ActionContextCleanUp，作用是方便struts2和SiteMesh整合，其实本来和文件上传没有什么关系，但发现有时候会出现一些未知的异常，但加了这个Filter后就一切正常了

<filter>
		<filter-name>struts-cleanup</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class>
	</filter>
<filter-mapping>
		<filter-name>struts-cleanup</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

但启动是后台出现了错误

***************************************************************************
*                                 WARNING!!!                              *
*                                                                         *
* >>> ActionContextCleanUp <<< is deprecated! Please use the new filters! *
*                                                                         *
*             This can be a source of unpredictable problems!             *
*                                                                         *
*                Please refer to the docs for more details!               *
*              http://struts.apache.org/2.x/docs/webxml.html              *
*                                                                         *
*************************************************************************

由于在struts升级时这个配置有漏洞，所以用以下配置代替

<filter>
		<filter-name>struts-prepare</filter-name>
         <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareFilter</filter-class>
	</filter>
	<filter-mapping>
         <filter-name>struts-prepare</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>
     
     <filter>
         <filter-name>struts-execute</filter-name>
         <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsExecuteFilter</filter-class>
     </filter>
     <filter-mapping>
         <filter-name>struts-execute</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>

<!-- 设置应用使用的解码集 -->
	<constant name="struts.i18n.encoding" value="UTF-8"/>

struts2文件上传

标签：struts2.0   文件上传   表单   

原文地址：http://blog.csdn.net/kevinxxw/article/details/46988337