springMvc+Oracle的图片转二进制流

package com.mvc.controller.teacher; import java.io.File; import java.io.IOException; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.util.FileCopyUtils; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.multipart.MultipartHttpServletRequest; import org.springframework.web.multipart.commons.CommonsMultipartFile; import com.mvc.entity.FileManager; import com.mvc.service.FileService; /** * * 文件上传控制类FileController * @author 杜维奥 * 2012-12-27 * * */ @Controller @RequestMapping("/mayuyu.do") public class FileController { //得到日志 protected final transient Log log = LogFactory .getLog( FileController.class); //Autowired这个注解就是spring可以自动帮你 //把bean里面引用的对象的setter/getter方法省略 @Autowired private FileService fileService; //@RequestMapping //无参数，默认调用方法 //TODO //上传文件ModelAndView @RequestMapping(params = "method=fileUpload",method = RequestMethod.POST) public String fileUpload(HttpServletRequest request, ModelMap modelMap) throws Exception{ try{ MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest)request; //得到图片内容 //获得文件 CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest.getFile("filePic"); //得到图片参数 String name =multipartRequest.getParameter("name"); System.out.println("filename:"+name); //得到文件名 String realFileName = file.getOriginalFilename(); System.out.println("realFileName:"+realFileName); //获取存放路径 //String picSavePath = request.getSession() String picSavePath = request.getSession() .getServletContext().getRealPath("/file/pic"); System.out.println("picSavePath:"+picSavePath); //创建文件 File dirPath = new File(picSavePath); //如不存在 if(!dirPath.exists()){ //路径+文件创建 dirPath.mkdir(); } //本地文件 File upLoadFile = new File(picSavePath+"/"+realFileName); //由Spring提供文件复制工具 FileCopyUtils.copy(file.getBytes(), upLoadFile); //得到图片路径 String picPath = upLoadFile.getAbsolutePath(); System.out.println(picPath); //主要是前台的显示 modelMap.put("picPath", picPath); } catch(Exception e){ //log.error(e.getMessage()); //modelMap.put("picPath", "不是图片格式"); e.printStackTrace(); } return "pic"; //return new ModelAndView("redirect:/file/pic.jsp"); } //上传文件---转成二进制流 @RequestMapping(params = "method=UploadOracle",method = RequestMethod.POST) public String UploadOracle(HttpServletRequest request, ModelMap modelMap) throws Exception{ try{ MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest)request; //得到图片内容 //获得文件 CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest.getFile("filePic"); //得到是流字节 byte[] data = file.getBytes(); //存到Oracle //调用接口 int id = fileService.FileUpload(data, file.getOriginalFilename()); modelMap.put("FileID", id); System.out.println("编号："+id); } catch(Exception e){ //log.error(e.getMessage()); //modelMap.put("picPath", "不是图片格式"); e.printStackTrace(); } return "picDataBase"; //return new ModelAndView("redirect:/file/pic.jsp"); } //解析图片 @RequestMapping(params = "method=showPic") public void showPic(@RequestParam("FileID")int id,HttpServletResponse response) { //第一种方法 try{ System.out.println(id); FileManager obj=(FileManager) fileService.find(id); System.out.println(obj.getFileName()); ServletOutputStream outputStream=response.getOutputStream(); response.reset(); response.setContentType("image/jpeg"); try { outputStream.write(obj.getFileByte(), 0, obj.getFileByte().length); outputStream.flush(); } finally { if (outputStream != null) { outputStream.close(); } } }catch(IOException e){ e.printStackTrace(); } //第二种方法 //主要用于SESSION //http://blog.csdn.net/yincheng886337/article/details/6830341 // FileManager obj=(FileManager) fileService.find(id); // InputStream in = new ByteArrayInputStream(obj.getFileByte()); // try { // ImageIO.write((RenderedImage) in, "image/jpeg", response.getOutputStream()); // } catch (IOException e) { // // TODO Auto-generated catch block // e.printStackTrace(); // } } }