一 分层结构
web（前端请求层）
biz（业务层）
dal（数据层）
client（外部请求层）
common（外部公共层）
facade（外观层）
二 分层明细
三 调用关系
服务和服务直接可以互相调用；
服务可以调用多个域的域能力；
域能力是封装好的最小颗粒度的能力，不可互相调用；
查询服务直接调用manager，不调用域能力；
四 各层规范
定义统一的异常处理切面：处理业务异常和其他运行时异常；
内部服务不做异常处理和返回result封装类，异常都抛给web层和facade层处理。
查询服务和其他服务区分开，单独放在一个包中；
能力唯一对应一个域，且是封装好的最小颗粒度的能力。
外部服务要在remote中做好异常处理和封装；
业务层中的common类为仅在应用内部使用的公共类；
mapper要按不同类型的数据源分开存放，如adb和xdb。
common只存放暴露给外部的实体类、常量和枚举；
暴露给外部的dto只保留外部必要的字段，其他字段如feature等不可存在。
定义统一的异常处理切面：处理业务异常和其他运行时异常；
facade层的hsf实现类只做简单的参数校验和转化，不要写业务逻辑。
五 通用代码和工具
统一异常处理切面
@RestControllerAdvicepublic class RestExceptionHandler {@ResponseStatus(HttpStatus.OK)@ExceptionHandler(Exception.class)public Result system(HttpServletRequest req, Exception e) {AllLoggers.EXCEPTION.error("RestExceptionHandler.system|servlet:{}|method:{}|code:{}|msg:{}",req.getServletPath(),req.getMethod(), e.getMessage(), e);return Result.error(ResultCode.BASE.SYSTEM_ERROR);}@ResponseStatus(HttpStatus.OK)@ExceptionHandler(BusinessException.class)public Result business(HttpServletRequest req, BusinessException e) {AllLoggers.EXCEPTION.error("RestExceptionHandler.business|servlet:{}|method:{}|code:{}|msg:{}",req.getServletPath(),req.getMethod(), e.getMessage(), e);return Result.error(e.getErrorCode(), e.getErrorMessage());}}
统一日志打印工具类
import org.slf4j.Logger;import org.slf4j.LoggerFactory;public interface AllLoggers {/*** 应用日志*/Logger APPLICATION = LoggerFactory.getLogger("APPLICATION");/*** 异常日志*/Logger EXCEPTION = LoggerFactory.getLogger("EXCEPTION");/*** 业务日志*/Logger BIZ = LoggerFactory.getLogger("BIZ");/*** hsf日志*/Logger HSF = LoggerFactory.getLogger("HSF");/*** 入口日志*/Logger MTOP = LoggerFactory.getLogger("MTOP");}
<?xml version="1.0" encoding="UTF-8"?><configuration><!-- https://github.com/spring-projects/spring-boot/blob/v1.5.13.RELEASE/spring-boot/src/main/resources/org/springframework/boot/logging/logback/defaults.xml --><include resource="org/springframework/boot/logging/logback/defaults.xml" /><property resource="application.properties"></property><property name="APP_NAME" value="toms" /><property name="LOG_PATH" value="${user.home}/${APP_NAME}/logs" /><property name="LOG_FILE" value="${LOG_PATH}/toms-root.log" /><appender name="APPLICATION"class="ch.qos.logback.core.rolling.RollingFileAppender"><file>${LOG_FILE}/toms-root.log</file><encoder><pattern><![CDATA[%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] [%level] [traceId:%X{EAGLEEYE_TRACE_ID}] [%class:%line] - %m %n ]]> </pattern><charset>UTF-8</charset></encoder><rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy"><fileNamePattern>${LOG_PATH}/logs_saved/toms-root.%d{yyyy-MM-dd}.%i.log</fileNamePattern><maxHistory>5</maxHistory><maxFileSize>1GB</maxFileSize><totalSizeCap>20GB</totalSizeCap></rollingPolicy></appender><appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender"><encoder><pattern>${CONSOLE_LOG_PATTERN}</pattern><charset>utf8</charset></encoder></appender><!--业务日志--><appender name="TOMS-BIZ-APPENDER"class="ch.qos.logback.core.rolling.RollingFileAppender"><File>${LOG_PATH}/toms-biz.log</File><rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy"><FileNamePattern>${LOG_PATH}/logs_saved/toms-biz.%d{yyyy-MM-dd}.%i.log</FileNamePattern><maxHistory>5</maxHistory><maxFileSize>2GB</maxFileSize><totalSizeCap>20GB</totalSizeCap></rollingPolicy><encoder><pattern><![CDATA[%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] [%level] [traceId:%X{EAGLEEYE_TRACE_ID}] [%class:%line] - %m %n ]]> </pattern><charset>UTF-8</charset></encoder></appender><!--hsf日志--><appender name="TOMS-HSF-APPENDER"class="ch.qos.logback.core.rolling.RollingFileAppender"><File>${LOG_PATH}/toms-hsf.log</File><rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy"><FileNamePattern>${LOG_PATH}/logs_saved/toms-hsf.%d{yyyy-MM-dd}.%i.log</FileNamePattern><maxHistory>5</maxHistory><maxFileSize>2GB</maxFileSize><totalSizeCap>20GB</totalSizeCap></rollingPolicy><encoder><pattern><![CDATA[%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] [%level] [traceId:%X{EAGLEEYE_TRACE_ID}] [%class:%line] - %m %n ]]> </pattern><charset>UTF-8</charset></encoder></appender><!-- 通用错误日志 --><appender name="TOMS-ERROR-APPENDER"class="ch.qos.logback.core.rolling.RollingFileAppender"><File>${LOG_PATH}/toms-error.log</File><filter class="ch.qos.logback.classic.filter.LevelFilter"><level>ERROR</level><onMatch>ACCEPT</onMatch><onMismatch>DENY</onMismatch></filter><rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy"><FileNamePattern>${LOG_PATH}/logs_saved/toms-error.%d{yyyy-MM-dd}.%i.log</FileNamePattern><maxHistory>5</maxHistory><maxFileSize>2GB</maxFileSize><totalSizeCap>10GB</totalSizeCap></rollingPolicy><encoder><pattern><![CDATA[%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] [%level] [traceId:%X{EAGLEEYE_TRACE_ID}] [%class:%line] - %m %n ]]> </pattern><charset>UTF-8</charset></encoder></appender><!-- 异常日志 --><appender name="TOMS-EXCEPTION-APPENDER"class="ch.qos.logback.core.rolling.RollingFileAppender"><File>${LOG_PATH}/toms-exception.log</File><rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy"><FileNamePattern>${LOG_PATH}/logs_saved/toms-exception.%d{yyyy-MM-dd}.log</FileNamePattern><maxHistory>5</maxHistory></rollingPolicy><encoder><pattern><![CDATA[%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] [%level] [traceId:%X{EAGLEEYE_TRACE_ID}] [%class:%line] - %m %n ]]> </pattern><charset>UTF-8</charset></encoder></appender><logger name="HSF" level="${logback.info.level}" additivity="false"><appender-ref ref="TOMS-HSF-APPENDER"/></logger><logger name="BIZ" level="${logback.info.level}" additivity="false"><appender-ref ref="TOMS-BIZ-APPENDER"/><appender-ref ref="TOMS-ERROR-APPENDER"/></logger><logger name="EXCEPTION" level="${logback.info.level}" additivity="false"><appender-ref ref="TOMS-EXCEPTION-APPENDER"/><appender-ref ref="TOMS-ERROR-APPENDER"/></logger><root level="INFO"><appender-ref ref="CONSOLE" /></root></configuration>
单位转化工具类
public class UnitConvertUtils {/*** 米和千米的进率*/public static final double RATE_OF_METRE_AND_KILOMETRE = 1000d;public static final int INT_RATE_OF_METRE_AND_KILOMETRE = 1000;/*** 分和元的进率*/public static final double RATE_OF_FEN_AND_YUAN = 100d;/*** 立方厘米和立方米的进率*/public static final double INT_RATE_OF_CM3_AND_M3 = 1000000d;/*** 米转千米** @param toConvert* @return 异常返回null*/public static Double convertMetre2Kilometre(Long toConvert) {if (toConvert == null) {return null;}return toConvert / RATE_OF_METRE_AND_KILOMETRE;}/*** 千米转米** @param toConvert* @return 异常返回null*/public static Long convertKilometre2Metre(Double toConvert) {if (toConvert == null) {return null;}BigDecimal bigDecimal = BigDecimal.valueOf(toConvert);BigDecimal factorBigDecimal = BigDecimal.valueOf(RATE_OF_METRE_AND_KILOMETRE);return bigDecimal.multiply(factorBigDecimal).longValue();}/*** 元转分** @param toConvert* @return 异常返回null*/public static Long convertYuan2Fen(Double toConvert) {if (toConvert == null) {return null;}BigDecimal bigDecimal = BigDecimal.valueOf(toConvert);BigDecimal factorBigDecimal = BigDecimal.valueOf(RATE_OF_FEN_AND_YUAN);return bigDecimal.multiply(factorBigDecimal).longValue();}/*** 元转分** @param toConvert* @return 异常返回null*/public static Long convertYuan2Fen(String toConvert) {if (toConvert == null) {return null;}BigDecimal bigDecimal = BigDecimal.valueOf(ConvertUtils.convertString2Double(toConvert));BigDecimal factorBigDecimal = BigDecimal.valueOf(RATE_OF_FEN_AND_YUAN);return bigDecimal.multiply(factorBigDecimal).longValue();}/*** 分转元** @param price* @return*/public static String convertFen2Yuan(Long price) {if (price == null) {return null;}return BigDecimal.valueOf(price).divide(new BigDecimal(RATE_OF_FEN_AND_YUAN)).toString();}/*** 里程米转换为千米** @param distance* @return*/public static Double meter2Kilometer(Long distance) {if (distance == null) {return null;}BigDecimal meter = BigDecimal.valueOf(distance);BigDecimal kilometer = meter.divide(new BigDecimal(INT_RATE_OF_METRE_AND_KILOMETRE));return kilometer.doubleValue();}/*** 立方厘米转立方米** @param volume* @return*/public static String convertCm32M3(Long volume) {if (volume == null) {return null;}return BigDecimal.valueOf(volume).divide(new BigDecimal(INT_RATE_OF_CM3_AND_M3)).toString();}}开发者评测局特别节目暨无影评测大赛颁奖典礼 重磅来袭！ 阿里云开发者社区重磅评测栏目《开发者评测局》暨无影评测大赛颁奖典礼重磅开播。CSDN TOP 1 博主“处女座程序猿”、清华大学教授卓晴，苏宁消金安全运维总经理顾黄亮等来自开发者、高校、企业的参赛代表嘉宾与无影内部团队展开了深度圆桌论坛，共话“云时代云办公”。点击阅读原文查看完整视频！
