struts2 上传单个文件

Posted 2020-06-24

1.图片上传 ENCTYPE="multipart/form-data"用于表单里有图片上传。 

 

jsp：

<input type="file" name="image">

struts.xml　　

 

<action name="" class="" method="">
			<!--动态设置savePath的属性  -->
			<param name="savePath">table_images</param>
			<interceptor-ref name="fileUpload">
				  <!-- 文件过滤 -->
                <param name="allowedTypes">image/bmp,image/png,image/gif,image/jpeg</param>
                <!-- 文件大小, 以字节为单位 -->
                <param name="maximumSize">1025956</param>
			</interceptor-ref>
			<!-- 默认拦截器必须放在fileUpload之后，否则无效 -->
            <interceptor-ref name="defaultStack" />
		</action>

　　action：

  // 封装上传文件域的属性
    private File image;
    // 封装上传文件类型的属性
    private String imageContentType;
    // 封装上传文件名的属性
    private String imageFileName;
    // 接受依赖注入的属性
    private String savePath;


public File getImage() {
		return image;
	}
	public void setImage(File image) {
		this.image = image;
	}
	public String getImageContentType() {
		return imageContentType;
	}
	public void setImageContentType(String imageContentType) {
		this.imageContentType = imageContentType;
	}
	public String getImageFileName() {
		return imageFileName;
	}
	public void setImageFileName(String imageFileName) {
		this.imageFileName = imageFileName;
	}
	public String getSavePath() {
		return savePath;
	}
	public void setSavePath(String savePath) {
		this.savePath = savePath;
	}
	

　　具体操作方法：

FileOutputStream fos = null;
		FileInputStream fis = null;
		try{
			ActionContext ac = ActionContext.getContext();  
			ServletContext sc = (ServletContext) ac.get(ServletActionContext.SERVLET_CONTEXT);  
			  System.out.println(sc.getRealPath("/") + getSavePath() + "\\" + getImageFileName());
	           
			  fos = new FileOutputStream(sc.getRealPath("/") + getSavePath() + "\\" + getImageFileName());
	            // 建立文件上传流
	            fis = new FileInputStream(getImage());
	            byte[] buffer = new byte[1024];
	            int len = 0;
	            while ((len = fis.read(buffer)) > 0) {
	                fos.write(buffer, 0, len);
	            }
	        } catch (Exception e) {
	            System.out.println("文件上传失败");
	            e.printStackTrace();
	        } finally {
	            close(fos, fis);
	        }

　　最后不要忘记关掉输入输出流