为什么java服务器把加签结果返给客户端，总说signature不匹配！！！！！

我这边没遇到什么问题。你可以先用Demo提供的本地加签方式跑通，就是这个：
       ossService.setGlobalDefaultTokenGenerator(new TokenGenerator() { // 设置全局默认加签器
            @Override
            public String generateToken(String httpMethod, String md5, String type, String date,
                    String ossHeaders, String resource) {

                String content = httpMethod + "\n" + md5 + "\n" + type + "\n" + date + "\n" + ossHeaders
                        + resource;

                return OSSToolKit.generateToken(accessKey, screctKey, content);
            }
        });
成功后，保留这段代码，然后把你向server请求Token的代码也加到这里，两种方式都生成token，然后两个token都打印出来，对比一下看看是不是哪里出问题了。

java不懂，不过建议用官方的java代码跑通了，再一点一点对照修改。

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我的理解应该都是用阿里的oss服务器吧，操作方式应该一样啊

献上源码：
Client：
ossService.setGlobalDefaultTokenGenerator(new TokenGenerator() { // 璁剧疆鍏ㄥ眬榛樿鍔犵鍣�
            @Override
            public String generateToken(String httpMethod, String md5, String type, String date,
                    String ossHeaders, String resource) {


                String content = httpMethod + "\n" + md5 + "\n" + type + "\n" + date + "\n" + ossHeaders
                        + resource;
                try {
                    //Create a socket to connect to the server
                    Socket socket=new Socket(serverUri,8000);


                    //Create an input stream to receive data from the server
                    fromServer=socket.getInputStream();
                    BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(fromServer));


                    //Create an output stream to send data from the server
                    toServer=socket.getOutputStream();
                    PrintWriter printWriter=new PrintWriter(toServer);


                    content=content.replace('\n', '!');
                    content=content+"\n";
                    //Send content to server
                    printWriter.write(content);
                    //Test
                    textView1.setText("content has been already sent.It's value is "+content);


                    printWriter.flush();


                    //Recieve signature from server
                    while (true) {
                        signResult=bufferedReader.readLine().trim();
                        if(signResult!=null){
                            //Test
                            textView2.setText("Signature has already recieved.It's value is "+signResult);
                            break;
                        }


                    }
                    fromServer.close();
                    bufferedReader.close();
                    toServer.close();
                    printWriter.close();
                    socket.close();
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }






                //return "OSS " + accessKey + ":" + signature; // 注意"OSS"和accessKey之间存在一个空格！！！
                return signResult;
            }




        });

Server：

public static void main(String[] args) throws NoSuchAlgorithmException,InvalidKeyException{
        
          try{
                //Create a server socket
                serverSocket=new ServerSocket(8000);
              
                //Listen for a connection request
                socket=serverSocket.accept();


                //Create data input and output streams
                inputFromClient=socket.getInputStream();
                bufferedReader=new BufferedReader(new InputStreamReader(inputFromClient));
                
                outputToClient=socket.getOutputStream();
                printWriter=new PrintWriter(outputToClient);


                while (true) {
                    //Receive radius from the client
                    
                    String getContent=bufferedReader.readLine();
                    
                    //Test
                    if(getContent!=null){
                        getContent=getContent.replace('!', '\n');
                        System.out.println("Recieved content successful! It's:"+getContent);
                        //getContent=getContent.substring(0,getContent.length()-2);
                         //Encode
                        String signResult=null;
                        try {
                            //signResult=OSSToolKit.generateToken(accessKey, secretKey, getContent);
                            HmacSHA1Signature hmacSHA1Signature=new HmacSHA1Signature();
                            signResult="OSS " + accessKey + ":"+hmacSHA1Signature.computeSignature(secretKey, getContent);
                            signResult=signResult.trim();
                        } catch (Exception e) {
                            // TODO: handle exception
                            OSSLog.logD(e.toString());
                        }
                        
                        //Test
                        if(signResult!=null){
                            System.out.println("Encode signature successful! It's:"+signResult);
                        }else {
                            System.out.println("signature is null!");
                        }
                        //Send signature to the client
                        printWriter.write(signResult);
                        System.out.println("Send signature is successful!");
                        printWriter.flush();
                        break;
                    }
                    
                }
                inputFromClient.close();
                bufferedReader.close();
                outputToClient.close();
                printWriter.close();
                socket.close();
                serverSocket.close();
                
            }
            catch(IOException e){
                e.printStackTrace();
            }
    
          
  }

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官方的java代码，你是指 客户端+服务器 都是pc的方式。我跑过了，没问题的。而且 客户端+服务器 都是pc的方式并没有涉及到 服务器加签 操作。晕。。

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你那边也是 android客户端，服务器加密签方式？服务器用java吗？？
我java服务器也是用OSSToolKit.generateToken(accessKey, screctKey, content); 这个方法加密么？？可是为什么一直返回null？？