struts2 上传文件

1)提交表单设置

<form action="upload.do" method="post" enctype="multipart/form-data">
	<table>
		<tr>
			<td>选择文件</td>
			<td>
				<input type="file" name="upload" value=""/>
			</td>
		</tr>
		<tr>
			<td><input type="submit" value="上传文件" /></td>
		</tr>
	</table>
</form>

注意enctype一定要是"multipart/form-data"

2)Action代码

public class UploadAction extends ActionSupport {

	private static final long serialVersionUID = 1224534552231961695L;

	protected final Log logger = LogFactory.getLog(getClass());
	
	private File upload;				// 上传的临时文件
	private String uploadContentType;	// 文件的类型
	private String uploadFileName;		// 文件名

	@Override
	public String execute() throws Exception {
		
		// 文件类型检查
		if (! uploadContentType.equals("application/msword")) {
			addFieldError("upload", "非法的上传文件类型");
			return INPUT;
		} 
		
		String tmpPath = ServletActionContext.getServletContext().getRealPath("tmp");
		FileUtils.copyFile(upload, new File(tmpPath, uploadFileName));		// 拷贝文件
		return SUCCESS;
	}

	// getter setter ...
}

3)配置Action strutsl.xml

<!-- ... -->
<action name="upload" class="net.csdn.struts.action.UploadAction">
	<param name="allowedTypes">application/msword,text/html</param>   <!-- 注入给Action用于配置允许上传类型 -->
	<result name="success" type="dispatcher">/WEB-INF/jsp/success.jsp</result>
	<result name="input" type="dispatcher">/index.jsp</result>
</action>