基于Spring框架的文件下载

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闲话不多说直接上代码

Controller

@RequestMapping(value = "/download", method = RequestMethod.GET)public void download(@ModelAttribute("glpLanguageFileDTO")GLPLanguageFileDTO glpLanguageFileDTO,HttpServletResponse response) throws GLPBusinessException, IOException {//设置文件名字（可自由发挥）String name=glpLanguageFileDTO.getLanguageFileType().toLowerCase()+"_"+glpLanguageFileDTO.getLanguageIsoCode()+".properties";//若需要生成临时文件可指定路径，则FileOutputStream(name)和FileInputStream(name)中的"name"替换成"path"//String path="\\\\VATPDDSCH-02\\FileServer\\Registration\\TOC_GSO\\"+name;response.setContentType("multipart/form-data"); //为properties添加注释response.setHeader("Content-Disposition", "attachment;fileName="+name);ServletOutputStream out;  //从数据库中查出相关的数据到Properties  类中Properties  prop  = glpLanguageService.downloadStandardFile(glpLanguageFileDTO);//保存文件FileOutputStream outputStream = new FileOutputStream(name);prop.store(outputStream, name);outputStream.close();//读取文件FileInputStream inputStream = new FileInputStream(name);out  =  response.getOutputStream();    int  b  =  0;    byte[]  buffer=new byte[inputStream.available()];    while  ((b=inputStream.read(buffer))!=-1){    //写到输出流(out)中  out.write(buffer,0,b);    }   inputStream.close();  out.close();  out.flush();}

GLPLanguageService类

生成Properties，（可根据自己需要的文件进行编写）此处我用的事Properties文件

private PropertiesPersister propertiesPersister = new DefaultPropertiesPersister();@Overridepublic Properties downloadStandardFile(GLPLanguageFileDTO glpLanguageFileDTO)throws GLPBusinessException {Properties props = new Properties();try {GLPLanguageFile glpLanguages=glpLanguageDao.getGLPLanguageFileByTypeAndIso(glpLanguageFileDTO.getLanguageFileType(), glpLanguageFileDTO.getLanguageIsoCode()).get(0);InputStream is =new ByteArrayInputStream(glpLanguages.getLanguageContent());propertiesPersister.load(props, is);} catch (SQLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return props;}

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