How to solve: Java log error: Record content is garbled

How to solve: Java log error: Record content is garbled

In the Java development process, logs are a very important part, it can help us track and debug the code . However, sometimes when we use the logger, we encounter the problem of garbled recording content. In this article, we will discuss how to solve this problem and provide some code examples.

1. Check the encoding format of the log file
   First, we need to check the encoding format of the log file. If the encoding format of the log file is incorrect, the recorded content will be garbled. Usually, using UTF-8 encoding format is a better choice. You can open the log file with a text editor to view the encoding format of the file and make corrections.
2. Set the encoding format of the logger
   In addition to checking the encoding format of the log file, we also need to ensure that the encoding format of the logger is set correctly. Here is a sample code that shows how to set the encoding format of the logger to UTF-8:

import java.nio.charset.StandardCharsets;
import java.util.logging.ConsoleHandler;
import java.util.logging.Handler;
import java.util.logging.Logger;

public class LogExample {
    private static final Logger LOGGER = Logger.getLogger(LogExample.class.getName());

    public static void main(String[] args) {
        Handler[] handlers = LOGGER.getHandlers();
        for (Handler handler : handlers) {
            if (handler instanceof ConsoleHandler) {
                handler.setEncoding(StandardCharsets.UTF_8.name());
            }
        }
    }
}

In this example, we get all the processors of the current logger and iterate over them . We then check if the processor is a console processor and set its encoding to UTF-8.

3. Use an appropriate logger
   Sometimes, the problem of garbled recorded content may be caused by the use of an inappropriate logger. In Java, commonly used loggers include java.util.logging, log4j and logback. Each logger has its own specific configuration and encoding settings. Normally, it is recommended to use a popular logger such as log4j or logback and configure the logger correctly according to its official documentation to avoid garbled problems.
4. Use appropriate log output format
   Another cause of garbled record content may be that the log output format is incorrect. Loggers usually support different output formats such as text format, JSON format, etc. If we select an inappropriate output format when configuring the logger, the recorded content will be garbled. Therefore, we need to carefully select a suitable output format and configure it according to its requirements.
5. Use the correct character encoding
   Finally, ensuring the correct use of character encoding is the key to solving the problem of garbled recorded content. In Java, strings are usually encoded using Unicode. However, before writing the string to the log file, we need to convert it to the appropriate character encoding. The following is a sample code that shows how to write a string to a log file in UTF-8 encoding:

import org.apache.log4j.Logger;

import java.io.UnsupportedEncodingException;

public class LogExample {
    private static final Logger LOGGER = Logger.getLogger(LogExample.class);

    public static void main(String[] args) {
        String message = "这是一个示例消息";

        try {
            byte[] bytes = message.getBytes("UTF-8");
            String encodedMessage = new String(bytes, "UTF-8");
            LOGGER.info(encodedMessage);
        } catch (UnsupportedEncodingException e) {
            LOGGER.error("Unsupported encoding: " + e.getMessage());
        }
    }
}

In this example, we use the getBytes() method to encode the string in UTF-8 Encoding converted into byte array. Then, convert the byte array back to a string via the new String() method, specifying UTF-8 encoding. Finally, we use a logger to output the converted string.

Summary:
In Java development, it is not uncommon to encounter the problem of garbled Java log record content. To solve this problem, we need to check the encoding format of the log file, set the encoding format of the logger, use the appropriate logger and log output format, and use the character encoding correctly. We hope that the code examples in this article can help readers solve the problem of garbled recorded content in Java log errors. If you still encounter difficulties, it is recommended to consult the relevant official documentation or seek help from the community.

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