Struts2文件上传和下载

1.文件上传

jsp页面

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

action

    private File packagePath;//文件上传属性
    private String packagePathContentType;//文件上传类型
    private String packagePathFileName;//文件上传名称
    private String savePath;//文件上传路径

    /**
     * 新增
     * @return
     * @throws Exception
     */
    public String add() throws Exception {
        
        saveFile();//上传附件
        
        return "add";
    }

    private void saveFile() throws Exception{
        byte[] buffer =new byte[1024];
        FileInputStream fis=new FileInputStream(getPackagePath());//读取文件
        //保存文件,并设置保存目录的路径
        FileOutputStream fos=new FileOutputStream(getSavePath()+"\"+this.getPackagePathFileName());
        int length=fis.read(buffer);
        while(length>0){
            fos.write(buffer,0,length);
            length=fis.read(buffer);
        }
        fis.close();
        fos.flush();
        fos.close();
    }

    public String getSavePath() {
        return ServletActionContext.getServletContext().getRealPath(savePath);
    }


    public void setSavePath(String savePath) {
        this.savePath = savePath;
    }

struts.xml

        <action name="stu*" class="updateStandardAction" method="{1}">
            <param name="savePath">/attachment</param> //在项目中要有attachment文件夹,用于保存上传的文件
3         </action>

下载文件

jsp页面

 <a href="download.action?fileName=${p.packagePath}">下载</a> 

action

package cn.bd.standard.action;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;
/**
 * 下载
 * @author TaoXianXue
 *
 */
public class AttachmentDownAction extends ActionSupport{
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    
    
    private String inputPath;//读取下载文件的目录
    private String fileName;//下载文件的文件名
    private InputStream inputStream;//读取下载文件的输入流
    private String contentType;//下载文件的类型
    
    @Override
    public String execute() throws Exception {
        // TODO Auto-generated method stub
        return super.execute();
    }
    
    public String getInputPath() {
        return inputPath;
    }
    public void setInputPath(String inputPath) {
        this.inputPath = inputPath;
    }
    public String getFileName() throws UnsupportedEncodingException {
        return java.net.URLEncoder.encode(fileName, "UTF-8");//??????????????????
        /*return fileName;*/
    }
    public void setFileName(String fileName)  {
        /*this.fileName = new String(fileName.getBytes("ISO8859-1"), "utf-8");*/
        this.fileName=fileName;
    }
    public InputStream getInputStream() throws FileNotFoundException {
        String path=ServletActionContext.getServletContext().getRealPath(inputPath);
        return new BufferedInputStream(new FileInputStream(path+"\"+fileName));
    }
    public void setInputStream(InputStream inputStream) {
        this.inputStream = inputStream;
    }
    public String getContentType() {
        return contentType;
    }
    public void setContentType(String contentType) {
        this.contentType = contentType;
    }
}

struts.xml

        <action name="download" class="cn.bd.standard.action.AttachmentDownAction">
            <param name="inputPath">/attachment</param> <!-- 从那里下载 -->
            <result name="success" type="stream">
                <param name="contentType">application/octet-stream</param><!-- 下载的文件类型 -->
                <param name="inputName">inputStream</param>
                <param name="contentDisposition">attachment;fileName="${fileName}"</param>
            </result>
        </action>