String http输入输出流导入导出

导出(下载)

public static void exportString(String downFileName,String exportString , HttpServletResponse response,HttpServletRequest request) throws Exception{
        ByteArrayInputStream byteIs = new ByteArrayInputStream(exportString.getBytes("UTF-8")); 
        
        response.reset(); // 必要地清除response中的缓存信息
        response.setHeader("Content-Disposition", "attachment; filename=" + new String(downFileName.getBytes("GBK"),"ISO8859-1"));
        response.setContentType("application/text/html");//根据个人需要,这个是下载文件的类型
        javax.servlet.ServletOutputStream out = response.getOutputStream();
        byte[] content = new byte[1024];
        int length = 0;
        while ((length = byteIs.read(content)) != -1) {
            out.write(content, 0, length);
        }
        out.flush();
        out.close();
        byteIs.close();
    }

导入

public void importTemplateDetail() throws Exception{
        if (file != null && file.isFile() && file.canRead() ) {
            String result = "";
            InputStream input = null;    //excel输入流
            BufferedReader bufferedReader = null;
            try {
                input = new FileInputStream(file);
 8                 InputStreamReader read = new InputStreamReader(input);
 9                 bufferedReader = new BufferedReader(read);
10                 String lineTxt = null;
11                 String content = "";
12                 while((lineTxt = bufferedReader.readLine()) != null){
13                     content += lineTxt.trim();
14                     
15                 }
                
                //密文长度，16进制
                String encryptLength_16 = content.substring(0, 2);    
                Integer encryptLen = Integer.parseInt(encryptLength_16, 16);
                //密文
                String encrypt = content.substring(2, encryptLen+2);
                //正文
                String importContent = content.substring(encryptLen+2,content.length());
                //对正文长度加密并与密文对比，是否长度一致，不一致则表示与导出时的内容有异
                String encryptionContentLength = EncryptionHelper.getInstance().encryptionToMD5(String.valueOf(importContent.length()));
                if (!encrypt.equals(encryptionContentLength)) {
                    response("{\"success\":false,\"message\":\"导入内容有误，请核对后重新导入\"}");
                    return;
                }
                
                System.out.println("16进制密文长度："+encryptLen);
                System.out.println("16进制密文："+encrypt);
                System.out.println("导入内容："+importContent);
                
            }catch (Exception e) {
                System.out.println(e.getMessage());
                response("{\"success\":false,\"message\":\""+e.getMessage()+"\"}");
                return;
            }finally{
                if(input!=null){
                    input.close();
                }
                if (bufferedReader!=null) {
                    bufferedReader.close();
                }
            }
            response("{\"success\":true,\"message\":\"导入成功！\"}");
        }else{
            response("{\"success\":false,\"message\":'文件读取失败！'}");
        }
    }