利用Struts上传文件

时间：2024-11-18 15:35:55

在利用struts2完成上传文件到服务器时，遇到获取不到文件名

原因是在Action中的属性名没有和jsp中的属性名匹配

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    <base href="<%=basePath%>">

    <title>My JSP 'main.jsp' starting page</title>

    <meta http-equiv="pragma" content="no-cache">

    <meta http-equiv="cache-control" content="no-cache">

    <meta http-equiv="expires" content="0">

    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

    <meta http-equiv="description" content="This is my page">

    <!--

    <link rel="stylesheet" type="text/css" href="styles.css">

    -->

  </head>

  <body>

    <h1>上传文件</h1>

   <form action="upload" method="post" enctype="multipart/form-data">

   请选择文件:<input type="file" name="file"/>

   <input type="submit" value="提交"/>

   </form>

  </body>

</html>

Action:

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class Upload extends ActionSupport{

    private File file;

    private String fileContentType;

    private String fileFileName;

    public File getFile() {

        return file;

    }

    public void setFile(File file) {

        this.file = file;

    }

    public String getFileContentType() {

        return fileContentType;

    }

    public void setFileContentType(String fileContentType) {

        this.fileContentType = fileContentType;

    }

    public String getFileFileName() {

        return fileFileName;

    }

    public void setFileFileName(String fileFileName) {

        this.fileFileName = fileFileName;

    }

    public String upload(){

        System.out.println(this.fileContentType);

        System.out.println(this.fileFileName);

        InputStream is=null;

        try {

            is=new FileInputStream(file);

        } catch (Exception e) {

            // TODO: handle exception

            e.printStackTrace();

        }

        String path=ServletActionContext.getServletContext().getRealPath("/");

        System.out.println(path);

        File toFile=new File(path, this.getFileFileName());

        OutputStream os=null;

        try {

            os=new FileOutputStream(toFile);

        } catch (Exception e) {

            // TODO: handle exception

            e.printStackTrace();

        }

        byte[] buffer=new byte[1024];

        int length=0;

        try {

            while((length=is.read())>0){

                os.write(buffer, 0, length);

            }

            is.close();

            os.close();

        } catch (Exception e) {

            // TODO: handle exception

            e.printStackTrace();

        }

        return SUCCESS;

    }

}

Action中该这样配置

private File file;
 private String fileContentType;
 private
String fileFileName;

ContentType和FileName是固定的，前缀为<input>中的name的值

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