背景实习经历，通过restful接口传过来一个json，json里面包含图片的信息。但是经过base64编码的。
步骤,base64解码成字节数组---------->然后转换成流----------->网络传输。可以通过main函数测试
import java.io.ByteArrayInputStream; import java.io.InputStream; public class ImageBase64Upload { public static String imageBase64UploadFile(String base64Data,String docId){ try { //base64,前缀 String dataPrix = ""; //base64,后缀 String data = ""; if(base64Data == null || "".equals(base64Data)){ throw new Exception("上传失败，上传图片数据为空"); }else{ String [] d = base64Data.split("base64,"); if(d != null && d.length == 2){ dataPrix = d[0]; data = d[1]; }else{ throw new Exception("上传失败，数据不合法"); } } //文件扩展名 String suffix = ""; if("data:image/jpeg;".equalsIgnoreCase(dataPrix)){//data:image/jpeg;base64,base64编码的jpeg图片数据 suffix = ".jpg"; } else if("data:image/x-icon;".equalsIgnoreCase(dataPrix)){//data:image/x-icon;base64,base64编码的icon图片数据 suffix = ".ico"; } else if("data:image/gif;".equalsIgnoreCase(dataPrix)){//data:image/gif;base64,base64编码的gif图片数据 suffix = ".gif"; } else if("data:image/png;".equalsIgnoreCase(dataPrix)){//data:image/png;base64,base64编码的png图片数据 suffix = ".png"; }else{ throw new Exception("上传图片格式不合法"); } //生成的文件名称 String tempFileName = docId + suffix; byte[] bs = Base64Util.decodeFast(data); //解码方式底下有的。 try{ InputStream inputStream = new ByteArrayInputStream(bs); return AliyunUtil.uploadFile(inputStream, tempFileName, inputStream.available()+0L,"SRM-DOC-TEST/"); }catch(Exception ee){ throw new RuntimeException("OSS文件上传失败，"+ee.getMessage()); } } catch (Exception ex) { return "OSS文件上传失败，"+ex.getMessage(); } } public static void main(String[] args) throws Exception { String data = 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String docId = "10086"; String url = imageBase64UploadFile(data,docId); System.out.println(url); } }
public static String uploadFile(InputStream stream, String fileName, Long filelength, String fileFolder){ String url = ""; String fileType ="jpg"; String logImageName = "srmPhoto" + fileName;// 构建阿里云上文件名称 try { OSSObjectConst oss = new OSSObjectConst(); try {
/*
*region是域名比如阿里的是"oss-cn-hangzhou.aliyuncs.com/" bucket,ACCESS_ID,ACCESS_KEY是自己相关的配置
*/ url = oss.uploadImgWithStream(stream, filelength, fileFolder, logImageName, bucketName, ACCESS_ID, ACCESS_KEY,region,fileType); } catch (Exception e) { e.printStackTrace(); } } catch (IllegalStateException e) { e.printStackTrace(); } return url; }
public String uploadImgWithStream(InputStream stream,Long filelength,String fileFolder,String fileName,String bucketName,String ACCESS_ID,String ACCESS_KEY,String region,String fileType) throws Exception { fileName = fileFolder + fileName; // 使用默认的OSS服务器地址创建OSSClient对象。 OSSClient client = new OSSClient(ACCESS_ID, ACCESS_KEY); try { System.out.println("正在上传..."); uploadFileWithStream(stream,filelength,client, bucketName, fileName,fileType); } catch(Exception e) { throw e; } //拼装头像访问连接 String imgUrl = "http://"+bucketName+"."+region+fileName; return imgUrl; }
// 上传文件 public static void uploadFileWithStream(InputStream stream,Long filelength, OSSClient client, String bucketName, String key,String fileType) throws OSSException, ClientException, FileNotFoundException { ObjectMetadata objectMeta = new ObjectMetadata(); objectMeta.setContentLength(filelength); // 可以在metadata中标记文件类型 objectMeta.setContentType(fileType); //判断文件是否已经存在 boolean isExist = true; try{ client.getObject(bucketName, key); }catch(Exception e){ isExist = false; } if(isExist){ //删除已有文件 client.deleteObject(bucketName, key); } //上传新文件 client.putObject(bucketName, key, stream, objectMeta); System.out.println("上传完毕"); }
public final static byte[] decodeFast(String s) { // Check special case int sLen = s.length(); if (sLen == 0) return new byte[0]; int sIx = 0, eIx = sLen - 1; // Start and end index after trimming. // Trim illegal chars from start while (sIx < eIx && IA[s.charAt(sIx) & 0xff] < 0) sIx++; // Trim illegal chars from end while (eIx > 0 && IA[s.charAt(eIx) & 0xff] < 0) eIx--; // get the padding count (=) (0, 1 or 2) int pad = s.charAt(eIx) == '=' ? (s.charAt(eIx - 1) == '=' ? 2 : 1) : 0; // Count // '=' // at // end. int cCnt = eIx - sIx + 1; // Content count including possible // separators int sepCnt = sLen > 76 ? (s.charAt(76) == '\r' ? cCnt / 78 : 0) << 1 : 0; int len = ((cCnt - sepCnt) * 6 >> 3) - pad; // The number of decoded // bytes byte[] dArr = new byte[len]; // Preallocate byte[] of exact length // Decode all but the last 0 - 2 bytes. int d = 0; for (int cc = 0, eLen = (len / 3) * 3; d < eLen;) { // Assemble three bytes into an int from four "valid" characters. int i = IA[s.charAt(sIx++)] << 18 | IA[s.charAt(sIx++)] << 12 | IA[s.charAt(sIx++)] << 6 | IA[s.charAt(sIx++)]; // Add the bytes dArr[d++] = (byte) (i >> 16); dArr[d++] = (byte) (i >> 8); dArr[d++] = (byte) i; // If line separator, jump over it. if (sepCnt > 0 && ++cc == 19) { sIx += 2; cc = 0; } } if (d < len) { // Decode last 1-3 bytes (incl '=') into 1-3 bytes int i = 0; for (int j = 0; sIx <= eIx - pad; j++) i |= IA[s.charAt(sIx++)] << (18 - j * 6); for (int r = 16; d < len; r -= 8) dArr[d++] = (byte) (i >> r); } return dArr; }