struts2的单文件上传

第一步：首先写个上传文件的页面（简单的一个form表单）

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>文件上传</title>
</head>
<body>
    <h1>文件上传</h1>
    <br><br>
    <form action="/Struts2-day02pm/upload/one_upload.action" method="post" enctype="multipart/form-data">
        文件上传1：<br><br>
        <input type="file" name="oneFile"><br><br>
        <input type="submit" value="开始上传">
    </form>
    
</body>

 

第二步：创建一个基类BaseAction.java,继承ActionSupport，并实现ServletRequestAware,ServletResponseAware,ServletContextAware三个接口，重写三个接口的set方法

public class BaseAction extends ActionSupport implements ServletRequestAware,ServletResponseAware,ServletContextAware{
    /**
     * 编写一个基类，继承ActionSupport并实现相应的接口
     * 以后的Action直接继承该类，就可以简单获取到Servlet API
     * 这是一个典型的适配设计模式
     * @author Owen
     */

    private static final long serialVersionUID = 7267018575222346353L;
    
    
    @Override
    public void setServletContext(ServletContext servletContext) {
    }

    @Override
    public void setServletResponse(HttpServletResponse response) {
    }

    @Override
    public void setServletRequest(HttpServletRequest request) {
    }

}

 

第三步：创建OneUploadAction请求处理类，继承BaseAction

public class OneUploadAction extends BaseAction {

    private static final long serialVersionUID = -4445894434193884175L;
//    该属性名必须和<input type="file" name="oneFile">中name值一致
    private File oneFile;
//    真实名称
    private String oneFileFileName;
//    文件类型
    private String oneFileContentType;
    
    private HttpServletRequest request;
    
    @Override
    public void setServletRequest(HttpServletRequest request) {
        this.request = request;
    }

    @Override
    public String execute() throws Exception {
//        获取保存上传文件在服务器的真是路径
        String uploadPath = request.getServletContext().getRealPath("upload");
        System.out.println(uploadPath);//目录真是路径
        System.out.println("oneFile--"+oneFile.getName());//文件临时名称
        System.out.println("oneFileFileName--"+oneFileFileName);//文件原始名称
        System.out.println("oneFileContentType--"+oneFileContentType);//文件类型
//        第一种：该步骤适合上传小文件
//        将临时文件复制到硬盘上的真是路径
        /*
        File file = new File(uploadPath, oneFileFileName);//拼接文件的存放路径和存放文件的真实名称
        FileUtils.copyFile(oneFile, file);//将临时文件复制到上面这个路径
        */
        
//        第二种：适合大文件上传操作
        /*InputStream is = null;
        OutputStream os = null;
        
        is = new FileInputStream(oneFile);
        os = new FileOutputStream(new File(uploadPath,oneFileFileName));
        
        byte[] buffer = new byte[500];
        int length = 0;
        while((length=is.read(buffer,0,buffer.length)) != -1){
            os.write(buffer, 0,length);
        }
        os.close();
        is.close();*/
        copyFile(uploadPath);
        
        return SUCCESS;
    }
    public void copyFile(String uploadPath){
        InputStream is = null;
        OutputStream os = null;
        
        try {
            is = new FileInputStream(oneFile);
            os = new FileOutputStream(new File(uploadPath,oneFileFileName));
            
            byte[] buffer = new byte[500];
            int len = 0;
            while((len=is.read(buffer,0,buffer.length)) != -1){
                os.write(buffer, 0,len);
            }
            os.close();
            is.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }

    public File getOneFile() {
        return oneFile;
    }

    public void setOneFile(File oneFile) {
        this.oneFile = oneFile;
    }

    public String getOneFileFileName() {
        return oneFileFileName;
    }

    public void setOneFileFileName(String oneFileFileName) {
        this.oneFileFileName = oneFileFileName;
    }

    public String getOneFileContentType() {
        return oneFileContentType;
    }

    public void setOneFileContentType(String oneFileContentType) {
        this.oneFileContentType = oneFileContentType;
    }
    
}

 

第三步：配置struts.xml文件

<struts>

    <package name="upload-default" namespace="/upload" extends="struts-default">
        
        <action name="one_upload" class="com.struts2.day02pm.action.OneUploadAction">
            <result>/WEB-INF/jsp/one_upload_ok.jsp</result>
        </action>
        
    </package>

</struts>

 

posted @ 2015-10-30 13:53  病了?来串代码吧!  阅读(108)  评论(0)  编辑  收藏  举报