Java web程序中备份oracle数据库

Java web程序中备份oracle数据库

1.生成备份文件：

public  ActionForward createDmp(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
             throws  Exception  {
        Calendar c = Calendar.getInstance();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        String fileName = "data_oracle" + sdf.format(c.getTime());
        String dmpFolder = request.getSession().getServletContext()
                .getRealPath("")
                + "\\datas\\dmp\\";
        String logFolder = request.getSession().getServletContext()
                .getRealPath("")
                + "\\datas\\log\\";

        String cmd = "exp username/password@orcl file='" + dmpFolder + fileName
                + ".dmp' log='" + logFolder + fileName + ".log' owner=username";
        Runtime.getRuntime().exec(cmd);
        Thread.sleep(100 * 1000);
        request.setAttribute("msg", "备份成功,文件生成会有延迟,请稍等");
        return mapping.findForward("dmpCreated");
    }

2.查询备份文件：

public  ActionForward findDmp(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
             throws  Exception  {
        String dmpFolder = request.getSession().getServletContext()
                .getRealPath("")
                + "\\datas\\dmp\\";
        File folder = new File(dmpFolder);
        File[] files = folder.listFiles();
        List<String[]> fileList = new ArrayList<String[]>();
        for (int i = 0; i < files.length; i++) {
            if (files[i].getName().indexOf(".dmp") > 0) {
                String[] one = new String[2];
                one[0] = files[i].getName();
                one[1] = files[i].length() / 1000 + "K";
                fileList.add(one);
            }
        }
        request.setAttribute("fileList", fileList);
        return mapping.findForward("dmpList");
    }

3.删除备份文件：

public  ActionForward deleteDmp(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
             throws  Exception  {
        String dmpFolder = request.getSession().getServletContext()
                .getRealPath("")
                + "\\datas\\dmp\\";
        File folder = new File(dmpFolder);
        File[] files = folder.listFiles();
        String fileName = request.getParameter("dmpName");
        for (int i = 0; i < files.length; i++) {
            if (files[i].getName().equals(fileName)) {
                files[i].delete();
                request.setAttribute("msg", "删除成功");
                break;
            }
        }
        return mapping.findForward("dmpList");
    }