项目开发阶段，mybatis的SQL打印有占位符，调试起来还是有点麻烦，随想整合P6Spy打印可以直接执行的SQL，方便调试，用的Durid连接池。
Springboot项目集成Durid
<dependency><groupId>com.alibaba</groupId><artifactId>druid-spring-boot-starter</artifactId><version>1.2.18</version></dependency>配置文件application.yml
spring:datasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf8&useSSL=trueusername: rootpassword: 123456# 指定数据源为 DruidDataSource，默认值为 HikariDataSourcetype: com.alibaba.druid.pool.DruidDataSourcedruid:initial-size: 5min-idle: 5max-active: 15max-wait: 30000min-evictable-idle-time-millis: 30000time-between-eviction-runs-millis: 30000validation-query: SELECT 1 FROM DUALtest-while-idle: truetest-on-borrow: falsetest-on-return: falsepool-prepared-statements: truemax-pool-prepared-statement-per-connection-size: 5filters: stat,walluse-global-data-source-stat: truestat-view-servlet:enabled: trueurl-pattern: /druid/*login-username: adminlogin-password: 111111web-stat-filter:enabled: trueurl-pattern: /*exclusions: /druid/*, *.js, *.jpeg, *.jpg, *.png, *.gif, *.cssfilter:stat:merge-sql: trueslow-sql-millis: 3000log-slow-sql: true配置P6Spy，有两种方式，一种是添加依赖jar包，一种是用p6spy-spring-boot-starter。
第一种：
添加依赖：可以添加到dev环境，生产环境不建议使用，有性能损耗。
<dependency><groupId>p6spy</groupId><artifactId>p6spy</artifactId><version>3.9.1</version>
</dependency>或者只添加到开发环境
<profiles><profile><id>dev</id><activation><activeByDefault>true</activeByDefault></activation><properties><profiles.active>dev</profiles.active></properties><dependencies><dependency><groupId>p6spy</groupId><artifactId>p6spy</artifactId><version>3.9.1</version></dependency></dependencies></profile>
</profiles>修改数据源配置，需要改2个地方，url和driver-class-name
修改前：
修改后：
spring:datasource:url: jdbc:p6spy:mysql://x.x.x.x:3306/my_test?allowPublicKeyRetrieval=true&useSSL=true&serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf8&allowMultiQueries=true&useSSL=falseusername: rootpassword: 123456driver-class-name: com.p6spy.engine.spy.P6SpyDriver 
添加spy.properties文件，默认会在项目根目录生成一个spy.log文件，把SQL打印到该文件中。
module.log=com.p6spy.engine.logging.P6LogFactory,com.p6spy.engine.outage.P6OutageFactory# 自定义日志打印logMessageFormat=com.baomidou.mybatisplus.extension.p6spy.P6SpyLogger#日志输出到控制台appender=com.baomidou.mybatisplus.extension.p6spy.StdoutLogger# 使用日志系统记录 sql#appender=com.p6spy.engine.spy.appender.Slf4JLogger# 设置 p6spy driver 代理deregisterdrivers=true# 取消JDBC URL前缀useprefix=true# 配置记录 Log 例外,可去掉的结果集有error,info,batch,debug,statement,commit,rollback,result,resultset.excludecategories=info,debug,result,batch,resultset# 日期格式dateformat=yyyy-MM-dd HH:mm:ss# 真实JDBC driver , 多个以 逗号 分割 默认为空#driverlist=org.h2.Driverdriverlist=oracle.jdbc.OracleDriver# 是否开启慢SQL记录outagedetection=true# 慢SQL记录标准 2 秒outagedetectioninterval=2集成完成。
spy.properties参考：
mybatis-plus:
#3.2.1以上使用
modulelist=com.baomidou.mybatisplus.extension.p6spy.MybatisPlusLogFactory,com.p6spy.engine.outage.P6OutageFactory
#3.2.1以下使用或者不配置
#modulelist=com.p6spy.engine.logging.P6LogFactory,com.p6spy.engine.outage.P6OutageFactory
# 自定义日志打印
logMessageFormat=com.baomidou.mybatisplus.extension.p6spy.P6SpyLogger
#日志输出到控制台
appender=com.baomidou.mybatisplus.extension.p6spy.StdoutLogger
# 使用日志系统记录 sql
#appender=com.p6spy.engine.spy.appender.Slf4JLogger
# 设置 p6spy driver 代理
deregisterdrivers=true
# 取消JDBC URL前缀
useprefix=true
# 配置记录 Log 例外,可去掉的结果集有error,info,batch,debug,statement,commit,rollback,result,resultset.
excludecategories=info,debug,result,commit,resultset
# 日期格式
dateformat=yyyy-MM-dd HH:mm:ss
# 实际驱动可多个
#driverlist=org.h2.Driver
# 是否开启慢SQL记录
outagedetection=true
# 慢SQL记录标准 2 秒
outagedetectioninterval=2官网的例子：
################################################################## P6Spy Options File ## See documentation for detailed instructions ## http://p6spy.github.io/p6spy/2.0/configandusage.html #################################################################################################################################### MODULES ## ## Module list adapts the modular functionality of P6Spy. ## Only modules listed are active. ## (default is com.p6spy.engine.logging.P6LogFactory and ## com.p6spy.engine.spy.P6SpyFactory) ## Please note that the core module (P6SpyFactory) can't be ## deactivated. ## Unlike the other properties, activation of the changes on ## this one requires reload. ###################################################################modulelist=com.p6spy.engine.spy.P6SpyFactory,com.p6spy.engine.logging.P6LogFactory,com.p6spy.engine.outage.P6OutageFactory################################################################# CORE (P6SPY) PROPERTIES ################################################################## A comma separated list of JDBC drivers to load and register.# (default is empty)## Note: This is normally only needed when using P6Spy in an# application server environment with a JNDI data source or when# using a JDBC driver that does not implement the JDBC 4.0 API# (specifically automatic registration).#driverlist=# for flushing per statement# (default is false)#autoflush=false# sets the date format using Java's SimpleDateFormat routine.# In case property is not set, milliseconds since 1.1.1970 (unix time) is used (default is empty)#dateformat=# prints a stack trace for every statement logged#stacktrace=false# if stacktrace=true, specifies the stack trace to print#stacktraceclass=# determines if property file should be reloaded# Please note: reload means forgetting all the previously set# settings (even those set during runtime - via JMX)# and starting with the clean table# (default is false)#reloadproperties=false# determines how often should be reloaded in seconds# (default is 60)#reloadpropertiesinterval=60# specifies the appender to use for logging# Please note: reload means forgetting all the previously set# settings (even those set during runtime - via JMX)# and starting with the clean table# (only the properties read from the configuration file)# (default is com.p6spy.engine.spy.appender.FileLogger)#appender=com.p6spy.engine.spy.appender.Slf4JLogger#appender=com.p6spy.engine.spy.appender.StdoutLogger#appender=com.p6spy.engine.spy.appender.FileLogger# name of logfile to use, note Windows users should make sure to use forward slashes in their pathname (e:/test/spy.log)# (used for com.p6spy.engine.spy.appender.FileLogger only)# (default is spy.log)#logfile=spy.log# append to the p6spy log file. if this is set to false the# log file is truncated every time. (file logger only)# (default is true)#append=true# class to use for formatting log messages (default is: com.p6spy.engine.spy.appender.SingleLineFormat)#logMessageFormat=com.p6spy.engine.spy.appender.SingleLineFormat# Custom log message format used ONLY IF logMessageFormat is set to com.p6spy.engine.spy.appender.CustomLineFormat# default is %(currentTime)|%(executionTime)|%(category)|connection%(connectionId)|%(sqlSingleLine)# Available placeholders are:# %(connectionId) the id of the connection# %(currentTime) the current time expressing in milliseconds# %(executionTime) the time in milliseconds that the operation took to complete# %(category) the category of the operation# %(effectiveSql) the SQL statement as submitted to the driver# %(effectiveSqlSingleLine) the SQL statement as submitted to the driver, with all new lines removed# %(sql) the SQL statement with all bind variables replaced with actual values# %(sqlSingleLine) the SQL statement with all bind variables replaced with actual values, with all new lines removed#customLogMessageFormat=%(currentTime)|%(executionTime)|%(category)|connection%(connectionId)|%(sqlSingleLine)# format that is used for logging of the java.util.Date implementations (has to be compatible with java.text.SimpleDateFormat)# (default is yyyy-MM-dd'T'HH:mm:ss.SSSZ)#databaseDialectDateFormat=yyyy-MM-dd'T'HH:mm:ss.SSSZ# format that is used for logging of the java.sql.Timestamp implementations (has to be compatible with java.text.SimpleDateFormat)# (default is yyyy-MM-dd'T'HH:mm:ss.SSSZ)#databaseDialectTimestampFormat=yyyy-MM-dd'T'HH:mm:ss.SSSZ# format that is used for logging booleans, possible values: boolean, numeric# (default is boolean)#databaseDialectBooleanFormat=boolean# Specifies the format for logging binary data. Not applicable if excludebinary is true.# (default is com.p6spy.engine.logging.format.HexEncodedBinaryFormat)#databaseDialectBinaryFormat=com.p6spy.engine.logging.format.PostgreSQLBinaryFormat#databaseDialectBinaryFormat=com.p6spy.engine.logging.format.MySQLBinaryFormat#databaseDialectBinaryFormat=com.p6spy.engine.logging.format.HexEncodedBinaryFormat# whether to expose options via JMX or not# (default is true)#jmx=true# if exposing options via jmx (see option: jmx), what should be the prefix used?# jmx naming pattern constructed is: com.p6spy(.<jmxPrefix>)?:name=<optionsClassName># please note, if there is already such a name in use it would be unregistered first (the last registered wins)# (default is none)#jmxPrefix=# if set to true, the execution time will be measured in nanoseconds as opposed to milliseconds# (default is false)#useNanoTime=false################################################################## DataSource replacement ## ## Replace the real DataSource class in your application server ## configuration with the name com.p6spy.engine.spy.P6DataSource ## (that provides also connection pooling and xa support). ## then add the JNDI name and class name of the real ## DataSource here ## ## Values set in this item cannot be reloaded using the ## reloadproperties variable. Once it is loaded, it remains ## in memory until the application is restarted. ## ###################################################################realdatasource=/RealMySqlDS#realdatasourceclass=com.mysql.jdbc.jdbc2.optional.MysqlDataSource################################################################## DataSource properties ## ## If you are using the DataSource support to intercept calls ## to a DataSource that requires properties for proper setup, ## define those properties here. Use name value pairs, separate ## the name and value with a semicolon, and separate the ## pairs with commas. ## ## The example shown here is for mysql ## ###################################################################realdatasourceproperties=port;3306,serverName;myhost,databaseName;jbossdb,foo;bar################################################################## JNDI DataSource lookup ## ## If you are using the DataSource support outside of an app ## server, you will probably need to define the JNDI Context ## environment. ## ## If the P6Spy code will be executing inside an app server then ## do not use these properties, and the DataSource lookup will ## use the naming context defined by the app server. ## ## The two standard elements of the naming environment are ## jndicontextfactory and jndicontextproviderurl. If you need ## additional elements, use the jndicontextcustom property. ## You can define multiple properties in jndicontextcustom, ## in name value pairs. Separate the name and value with a ## semicolon, and separate the pairs with commas. ## ## The example shown here is for a standalone program running on ## a machine that is also running JBoss, so the JNDI context ## is configured for JBoss (3.0.4). ## ## (by default all these are empty) ###################################################################jndicontextfactory=org.jnp.interfaces.NamingContextFactory#jndicontextproviderurl=localhost:1099#jndicontextcustom=java.naming.factory.url.pkgs;org.jboss.naming:org.jnp.interfaces#jndicontextfactory=com.ibm.websphere.naming.WsnInitialContextFactory#jndicontextproviderurl=iiop://localhost:900################################################################# P6 LOGGING SPECIFIC PROPERTIES ################################################################## filter what is logged# please note this is a precondition for usage of: include/exclude/sqlexpression# (default is false)#filter=false# comma separated list of strings to include# please note that special characters escaping (used in java) has to be done for the provided regular expression# (default is empty)#include=# comma separated list of strings to exclude# (default is empty)#exclude=# sql expression to evaluate if using regex# please note that special characters escaping (used in java) has to be done for the provided regular expression# (default is empty)#sqlexpression=#list of categories to exclude: error, info, batch, debug, statement,#commit, rollback, result and resultset are valid values# (default is info,debug,result,resultset,batch)#excludecategories=info,debug,result,resultset,batch#whether the binary values (passed to DB or retrieved ones) should be logged with placeholder: [binary] or not.# (default is false)#excludebinary=false# Execution threshold applies to the standard logging of P6Spy.# While the standard logging logs out every statement# regardless of its execution time, this feature puts a time# condition on that logging. Only statements that have taken# longer than the time specified (in milliseconds) will be# logged. This way it is possible to see only statements that# have exceeded some high water mark.# This time is reloadable.## executionThreshold=integer time (milliseconds)# (default is 0)#executionThreshold=################################################################# P6 OUTAGE SPECIFIC PROPERTIES ################################################################## Outage Detection## This feature detects long-running statements that may be indicative of# a database outage problem. If this feature is turned on, it will log any# statement that surpasses the configurable time boundary during its execution.# When this feature is enabled, no other statements are logged except the long# running statements. The interval property is the boundary time set in seconds.# For example, if this is set to 2, then any statement requiring at least 2# seconds will be logged. Note that the same statement will continue to be logged# for as long as it executes. So if the interval is set to 2, and the query takes# 11 seconds, it will be logged 5 times (at the 2, 4, 6, 8, 10 second intervals).## outagedetection=true|false# outagedetectioninterval=integer time (seconds)## (default is false)#outagedetection=false# (default is 60)#outagedetectioninterval=30第二种：
添加依赖:
<dependency><groupId>com.github.gavlyukovskiy</groupId><artifactId>p6spy-spring-boot-starter</artifactId><version>1.9.0</version>
</dependency>修改数据源配置：同第一种方式，修改后
添加配置：这里和第一种方式不一样，可以添加个开关 enabled: true
decorator:datasource:p6spy:logging: filelog-file: spy.loglog-format: executionTime:%(executionTime) | sql:%(sqlSingleLine)
集成完成。
spy.log文件，日志格式可以通过配置文件修改，请另行参考网上的资料。
可能遇到的问题：dbType not support : null，这是没有识别出dbType，Durid数据源会存在该问题。
解决方式：修改Durid配置中的filter，在stat和wall指定dbType和enabled
总结： 除了dbType not support这个问题外，我这还遇到了connection error的问题，最后发现其实和P6Spy无关。我这不是纯净的框架，数据源配置都是jar包的方式继承的父项目，改起来很费劲。P6Spy配置其实很简单，Durid连接池用MySQL的时候会有dbType不识别问题，其余的数据源都很好集成，如果遇到其余的稀奇古怪的问题，请先排查框架本身是否正常。
