struts上传与下载

1.上传

(1).Action

public class Register extends ActionSupport{
    private FileuploadTool tool=new FileuploadTool();
    public FileuploadTool getTool() {
        return tool;
    }
    public void setTool(FileuploadTool tool) {
        this.tool = tool;
    }
    @Override
    public String execute() throws Exception {
        tool.beginUpload();
        return Action.INPUT;
    }
}

(2)FileuploadTool定义如下：

public class FileuploadTool {
    private File[] uploadFile;
    private String[] uploadFileFileName;
    private String[] uploadFileContentType;
    //...省略getter setter
     
    public void beginUpload() throws Exception{
        String dir=ServletActionContext.getServletContext()
          .getRealPath("/upload");//上传文件的保存路径
        for(int i=0;i<uploadFile.length;i++){
            String srcName=uploadFileFileName[i];
            int p=srcName.lastIndexOf(".");
            String suffix=srcName.substring(p+1, srcName.length());
            String pureName=srcName.substring(0, p);
            String fileName=srcName;
            File target;
            int count=1;
            while(true){
              target=new File(dir,fileName);
              if(target.exists())
                  fileName=pureName+"("+(count++)+")."+suffix;
              else break;
            }
            FileUtils.copyFile(uploadFile[i], target);
        }
        
    }
}

（3）.jsp页面表单设置

<s:form action="register" method="post" enctype="multipart/form-data" >
<!--name属性值必须与Action一致-->
<s:file name="tool.uploadFile"></s:file>
<s:submit value="submit"/>
</s:form>

2.下载

(1).action

public class Download extends ActionSupport{
    private String filename="";
    
    public String getFilename() {
        return filename;
    }

    public void setFilename(String filename) {
        this.filename = filename;
    }
    public InputStream getDownloadFile() throws Exception{
        //转码使得filename中的中文可以正确接收
        filename=new String(filename.getBytes("ISO8859-1"));
        FileInputStream fis=new FileInputStream(
                ServletActionContext.getServletContext()
                .getRealPath("/"+filename)
            );
        return fis;    
    }
    //用于在浏览器下载显示的文件名 转换为iso8859-1编码
    public String getDownloadFileName() throws Exception{
        return new String(filename.getBytes(),"ISO8859-1");
    }
    @Override
    public String execute() throws Exception {
        // TODO Auto-generated method stub
        return "success";
    }
}

(2).action配置

<action name="dd" class="com.control.Download" >
            <result name="success" type="stream">
                <param name="inputName">downloadFile</param>
                <param name="bufferSize">1024</param>
                <param name="contentDisposition">attachment;filename="${downloadFileName}"</param>
                <param name="contentType">application/x-msdownload</param>
            </result>
</action>

(3).jsp页面

<a href="dd.action?filename=<%= URLEncoder.encode("中文.doc") %>">点此下载</a>