#码力全开·技术π对# 在 Android 开发中，怎样通过有效的日志记录（Logging）策略快速定位并解决生产环境中

// Java示例：避免字符串拼接开销
if (logger.isDebugEnabled()) {
    logger.debug("User {} viewed product {}", userId, productId);
}

# Python日志过滤器示例
import re

class SensitiveFilter(logging.Filter):
    def filter(self, record):
        record.msg = re.sub(r'\d{16}', '**** **** **** ****', record.msg)
        return True

logger.addFilter(SensitiveFilter())

<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
    <file>app.log</file>
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
        <fileNamePattern>app.%d{yyyy-MM-dd}.log.gz</fileNamePattern>
        <maxHistory>30</maxHistory>
    </rollingPolicy>
    <encoder>
        <pattern>%d{HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n</pattern>
    </encoder>
</appender>

// Spring Boot动态调整日志级别的API
@RestController
@RequestMapping("/api/log")
public class LogLevelController {
    @Autowired
    private LoggerContext loggerContext;

    @PostMapping("/{loggerName}/{level}")
    public void setLogLevel(@PathVariable String loggerName, @PathVariable String level) {
        Logger logger = loggerContext.getLogger(loggerName);
        logger.setLevel(Level.valueOf(level));
    }
}