IO流输入流问题。。。。。。。。。。。。。。

action类中代码

 public class UploadPicAction extends ActionSupport {
    private String picName;
    private File pic;
    private String picFileName;
    private String picContentType;
    public String getPicName() {
        return picName;
    }
    public void setPicName(String picName) {
        this.picName = picName;
    }
    public File getPic() {
        return pic;
    }
    public void setPic(File pic) {
        this.pic = pic;
    }
    public String getPicFileName() {
        return picFileName;
    }
    public void setPicFileName(String picFileName) {
        this.picFileName = picFileName;
    }
    public String getPicContentType() {
        return picContentType;
    }
    public void setPicContentType(String picContentType) {
        this.picContentType = picContentType;
    }
    @Override
    public String execute() throws Exception{
        String uploadPath = ServletActionContext.getServletContext().getRealPath("/upload");
        String newFileName = UUID.randomUUID().toString() + picFileName.substring(picFileName.lastIndexOf("."));
        //System.out.println(uploadPath + "/" + newFileName);
        FileInputStream is = new FileInputStream(pic);
        FileOutputStream os = new FileOutputStream(uploadPath + "/" +newFileName);
        return SUCCESS;
    }
}

pic的类型为File，但是报的错在FileInputStream上，说需将pic类型改为String，我用的new FileInputStream（File），请问是怎么回事

最好把你的错误贴出来，正常来说有2个构造函数，String和File都行

FileInputStream可以接收文件名（string）或者file。你的file是不是有值？