图片上传到数据库---文件转换成byte[]型然后存入数据库

朱雀 2022-05-24 05:08 286阅读 0赞

/**
     * 文件转byte[]
     * @param file
     * @return
     */
       public byte[] getBytes(File file){  
           
           byte[] buffer = null;
           if (file == null){
               return buffer;
           } else {             
               try {     
                   FileInputStream fis = new FileInputStream(file);  
                   ByteArrayOutputStream bos = new ByteArrayOutputStream(1000);  
                   byte[] b = new byte[1000];  
                   int n;  
                   while ((n = fis.read(b)) != -1) {  
                       bos.write(b, 0, n);  
                   }  
                   fis.close();  
                   bos.close();  
                   buffer = bos.toByteArray();  
               } catch (FileNotFoundException e) {  
                   e.printStackTrace();  
               } catch (IOException e) {  
                   e.printStackTrace();  
               }
               
           }
             
            return buffer;  
     }

public Object addWarning(){
     		Map<String, Object> map = getMapParams();
     		JSONObject obj=new JSONObject();
     		//得到图片路径
     	    String impfilepath= map.get("impfilepath").toString();
     	  File file = new File(impfilepath);
     	  byte[] data = getBytes(file);
     	     try {
     			if(map!=null){
     				Warning warn = new Warning();
     				warn.setNAME(map.get("name").toString());
     				warn.setIDENTITY(map.get("identity").toString());
     				warn.setCASETYPE(map.get("casetype").toString());
     				warn.setPIC(data);
     				warn.setUSER_ID(this.getUser().getUsername().toString());
     				warningMapper.addWarning(warn);
     				obj.put("info", "提交成功");
     				}else{
     					obj.put("info", "提交失败");
     				}
     		} catch (MyException e) {
               e.printStackTrace();		}
     	     	
     		   	Object jsonObject = JSONObject.toJSON(obj);
     	        return jsonObject;
     	 }

注： java bean中 private byte\[\] PIC;

转自：https://www.cnblogs.com/ProgramerWorldOfMe/p/5149238.html