Struts2实现下传文件

Struts2实现上传文件

我用的版本是Struts2.1.8

 第一步：添加jar包commons-fileupload-1.2.1.jar和commons-io-1.3.2.jar

 第二部：在index.jsp中添加如下代码：

  

 <form action="upload.action" method="post"  enctype="multipart/form-data">
  上传文件：<input type="file" name="upload" /><br>
    <input value="上传" type="submit" />  </from>

 

第三步：在struts.xml里配置如下：

     <!--指定文件临时存储空间 --> 
<constant name="struts.multipart.saveDir" value="/temp" />
<constant name="struts.i18n.encoding" value="UTF-8"/>
<action name="upload" class="action.UploadAction">
  <!-- 动态设置Action的属性值 -->
<param name="savePath">/upload</param>
<!-- 配置Struts2默认的视图页面 -->
<result>/welcome.jsp</result>	
</action>

 

第四步：新建一个action包并新建类UploadAction

private File upload;
private String uploadContentType;
private String uploadFileName;

 private String savePath;
public void setSavePath(String value)
{
        this.savePath = value;
}
 private String getSavePath() throws Exception {
    return ServletActionContext.getRequest().getRealPath(savePath);
    }
public void setUpload(File upload) 
{
  this.upload = upload; 
}
public File getUpload() 
{
return (this.upload); 
}
public void setUploadContentType(String uploadContentType) 
{
this.uploadContentType = uploadContentType; 
}
public String getUploadContentType()
	{
	return (this.uploadContentType); 
	}
		public void setUploadFileName(String uploadFileName) 
	{
		this.uploadFileName = uploadFileName; 
	}
	public String getUploadFileName() 
	{
		return (this.uploadFileName); 
	}

	@Override
    public String execute() throws Exception
	{
				FileOutputStream fos = new FileOutputStream(getSavePath()
			+ "\\" + getUploadFileName());
		FileInputStream fis = new FileInputStream(getUpload());
		byte[] buffer = new byte[1024];
		int len = 0;
		while ((len = fis.read(buffer)) > 0)
		{
			fos.write(buffer , 0 , len);
		}
        return SUCCESS;
    }

web.xm下新增如下代码：

<!-- 配置Struts2的CleanUp的Filter -->
	<filter> 
        <filter-name>struts-cleanup</filter-name> 
        <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class> 
    </filter>
	<!-- 定义Struts2的CleanUp Filter拦截的URL -->
	<filter-mapping>
        <filter-name>struts-cleanup</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

 

在项目下新建一个upload文件夹 

完成！！！