logback 指定打印日志文件

第一步：配置logback.xml

<configuration>
 <!-- INFO级别日志 appender -->
    <appender name="apiInfoAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${XXX_HOME}/log/%d{yyyy-MM-dd}/xxx-api.log</fileNamePattern>
        </rollingPolicy>
        <encoder>
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] [%level] %logger - %msg%n</pattern>
        </encoder>
    </appender>
    <logger name="apiFilterLogger" level="INFO" additivity="false">
        <appender-ref ref="apiInfoAppender" />
    </logger>
</configuration>

第二步：代码里使用Logger

@Component
@ServletComponentScan
@WebFilter(urlPatterns = "/rest/v1/*", filterName = "apiFilter")
public class ApiFilter implements Filter {
    private static final String API_FILTER_LOGGER_NAME = "apiFilterLogger";

    @Value("${api.filter.enable:false}")
    private boolean apiFilerEnable;
    private Logger logger = LoggerFactory.getLogger(API_FILTER_LOGGER_NAME);

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        if (apiFilerEnable) {
            HttpServletRequest httprequest = (HttpServletRequest) request;
            String currentIp = request.getRemoteAddr();
            Enumeration<String> e = httprequest.getHeaderNames();
            logger.info("============================API Request Start==============================");
            String msg = String.format(">>API Request:[%s] [%s]", httprequest.getMethod(), httprequest.getRequestURL());
            logger.info(msg);
            logger.info(">>>>>Remote Addr:" + httprequest.getRemoteAddr());
            logger.info(">>>>>Query String:" + httprequest.getQueryString());
            logger.info("============Header=================");
            while (e.hasMoreElements()) {
                String k = e.nextElement();
                logger.info(">>>>>" + k + " = " + httprequest.getHeader(k));
            }

            Map<String, String[]> paramMap = httprequest.getParameterMap();
            logger.info("============Parameter Map=================");
            paramMap.entrySet().forEach(x -> {
                logger.info(">>>>>" + x.getKey() + "=" + Joiner.on(",").join(x.getValue()));
            });

            logger.info("===================================================================");
        }
        chain.doFilter(request, response);
    }
    @Override
    public void destroy() {
    }
}