com.google.protobuf.InvalidProtocolBufferException: Protocol message contain

本文探讨了在进行字节流转换过程中遇到的com.google.protobuf.InvalidProtocolBufferException异常,并详细解释了异常产生的原因及解决思路。主要问题在于字节流转换时使用的方法toByteArray()在处理大量数据时会包含多余字节,导致转换失败。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

错误记录:com.google.protobuf.InvalidProtocolBufferException: Protocol message contain 

FileInputStream in = new FileInputStream(file);

ByteArrayOutputStream out = new ByteArrayOutputStream();  

 byte[] b = new byte[1];
        int i =0;
        while ((i = in.read(b)) != -1){
        out.write(b,0,b.length);
        }

 byte[] byteArray = out.toByteArray();  

String string = new String(byteArray);

// 这里转换是因为编码方式不同,导致编码解码大小不一致

String isoString = new String(string , "ISO-8859-1");
byte[] isoret = isoString.getBytes("ISO-8859-1");

ByteArrayInputStream input = new ByteArrayInputStream(isoret );  

这个错误我发现的原因是,我在编写数组转换读取留转换时,在数组转换成对象时报的错。因为方法:toByteArray()


是将字节整体赋值,所以当代码b 的字节过大时,会导致空字节各种多余的0都在里面,然后copy出,在转换对象时就会出这个错误。 


I'm sorry, as an AI language model, I don't have access to your local environment and cannot execute commands on your behalf. However, I can provide you with general instructions on how to run the protobuf compiler. To generate a file using the protobuf compiler, you need to follow these steps: 1. Install the protobuf compiler: You can download and install the protobuf compiler from the official website (https://developers.google.com/protocol-buffers/docs/downloads). 2. Define your message schema: You need to create a .proto file that defines the structure of your message. 3. Compile your message schema: Use the protobuf compiler to compile your .proto file. The command to compile a .proto file is: ``` protoc --proto_path=IMPORT_PATH --python_out=OUTPUT_DIR INPUT_FILE ``` Where: - `IMPORT_PATH`: The directory containing any .proto files that your schema imports. - `OUTPUT_DIR`: The directory where you want the generated Python files to be saved. - `INPUT_FILE`: The path to your .proto file. For example, if you have a file named `my_message.proto` in the current directory and you want to generate the Python code in a folder named `generated`, you can run: ``` protoc --proto_path=. --python_out=generated my_message.proto ``` 4. Use the generated code: Once you have generated the Python code, you can import it in your Python project and use it to serialize and deserialize your messages. The generated code will contain a Python class for each message type defined in your .proto file. I hope this helps! Let me know if you have any further questions.
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值