强烈推荐一个大神的人工智能的教程：http://www.captainbed.net/zhanghan

描述

普通情况下,控制台打印出的sql是带?的,开发人员在自己调试的过程中遇到bug是再常见不过了,如果想看一下程序打出来的sql,发现参数的位置都是?,是不是很不爽,若想在数据库中执行sql,还需要手动修改sql的参数,真是麻烦,使用p6spy可以将sql格式化然后打出,打出的sql不再是带有?的,而是可以直接拷贝到数据库执行的。整合步骤如下:

添加jar包依赖

在service层添加依赖: ``` p6spy p6spy 3.7.0


</font>
<h1 id="背景"><table><tbody><tr><td bgcolor="#008B8B" height="40px"><font size="6px" face="华文新魏" color="white">自定义输出格式</font></td></tr></tbody></table></h1>
<font size="4px" face="楷体" font-weight="bold">

package com.zh.ssm.p6spy;

import com.p6spy.engine.spy.appender.MessageFormattingStrategy;

import java.text.SimpleDateFormat;
import java.util.Date;

/**

p6spy打印日志输出格式修改
1.只打印最终执行的sql.
2.sql换到下一行
3.结尾处增加分号,以标示sql结尾

public class P6SpyLogger implements MessageFormattingStrategy {
private SimpleDateFormat format = new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss:SSS”);

public P6SpyLogger() {
}
public String formatMessage(int connectionId, String now, long elapsed, String category, String prepared, String sql) {return !"".equals(sql.trim())?this.format.format(new Date()) + " | took " + elapsed + "ms | " + category + " | connection " + connectionId + "\n " + sql + ";":"";
}

}

</font>
<h1 id="背景"><table><tbody><tr><td bgcolor="#008B8B" height="40px"><font size="6px" face="华文新魏" color="white">配置spy.properties</font></td></tr></tbody></table></h1>
<font size="4px" face="楷体" font-weight="bold">
在service层的classpath下新建文件spy.properties,内容如下:

#%L

P6Spy

%%

Copyright © 2013 P6Spy

%%

Licensed under the Apache License, Version 2.0 (the “License”);

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an “AS IS” BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

#L%

#################################################################

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=
driverlist=com.mysql.jdbc.Driver

for flushing per statement

(default is false)

#autoflush = false

sets the date format using Java’s SimpleDateFormat routine.

In case property is not set, miliseconds 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
reloadproperties=true

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
appender=com.p6spy.engine.spy.appender.Slf4JLogger

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
logMessageFormat=com.zh.ssm.p6spy.P6SpyLogger

format that is used for logging of the date/time/… (has to be compatible with java.text.SimpleDateFormat)

(default is dd-MMM-yy)

#databaseDialectDateFormat=dd-MMM-yy
databaseDialectDateFormat=yyyy-MM-dd HH:mm:ss

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(.)?:name=

please note, if there is already such a name in use it would be unregistered first (the last registered wins)

(default is none)

#jmxPrefix=
#################################################################

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 JDNI 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.nameing: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 and result are valid values

(default is info,debug,result,resultset,batch)

#excludecategories=info,debug,result,resultset,batch
excludecategories=info,debug,result,resultset

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

**注意:**该文件中的logMessageFormat=com.zh.ssm.p6spy.P6SpyLogger要配置为上一步自定义输出的类
</font>
<h1 id="背景"><table><tbody><tr><td bgcolor="#008B8B" height="40px"><font size="6px" face="华文新魏" color="white">修改数据库连接池配置</font></td></tr></tbody></table></h1>
<font size="4px" face="楷体" font-weight="bold">
在datasource.xml配置文件中做如下修改,添加如下代码

<bean id="dataSource" class="com.p6spy.engine.spy.P6DataSource"><constructor-arg><ref bean="dataSourceDefault"/></constructor-arg>
</bean><bean id="dataSourceDefault" class="com.alibaba.druid.pool.DruidDataSource"destroy-method="close"><property name="filters" value="stat"/><property name="url" value="${url}" /><property name="username" value="${username}" /><property name="password" value="${password}" /><property name="keepAlive" value="true"/><!--最大连接数--><property name="maxActive" value="20" /><property name="initialSize" value="1" /><property name="maxWait" value="60000" /><property name="minIdle" value="1" /><property name="timeBetweenEvictionRunsMillis" value="60000" /><property name="minEvictableIdleTimeMillis" value="300000" /><property name="testWhileIdle" value="true" /><property name="testOnBorrow" value="false" /><property name="testOnReturn" value="false" /><property name="poolPreparedStatements" value="true" /><property name="maxOpenPreparedStatements" value="20" /><!--配置>0时,会检查activeCount是否大于onFatalErrorMaxActive，如果大于则抛异常。--><property name="onFatalErrorMaxActive" value="1" />
</bean>


</font>
<h1 id="背景"><table><tbody><tr><td bgcolor="#008B8B" height="40px"><font size="6px" face="华文新魏" color="white">修改log4j.properties</font></td></tr></tbody></table></h1>
<font size="4px" face="楷体" font-weight="bold">
添加如下内容:

##p6spy
log4j.logger.p6spy=info,spyConsole
#配置p6spy打印输出到控制台并定义其格式
log4j.appender.spyConsole = org.apache.log4j.ConsoleAppender
log4j.appender.spyConsole.Target=System.out
log4j.appender.spyConsole.layout = org.apache.log4j.PatternLayout
log4j.appender.spyConsole.layout.ConversionPattern = #####-----%m%n


</font>
<h1 id="背景"><table><tbody><tr><td bgcolor="#008B8B" height="40px"><font size="6px" face="华文新魏" color="white">效果展示</font></td></tr></tbody></table></h1>
<font size="4px" face="楷体" font-weight="bold">
打印出的sql格式为:

#####-----2018-07-09 20:20:30:238 | took 51ms | statement | connection 0
SELECT * FROM tb_user WHERE id = ‘1’;

</font>
<h1 id="背景"><table><tbody><tr><td bgcolor="#008B8B" height="40px"><font size="6px" face="华文新魏" color="white">博客推荐</font></td></tr></tbody></table></h1>
<font size="4px" face="楷体" font-weight="bold">1. 想配置更多的输出日志?请看这里:https://blog.csdn.net/lk_blog/article/details/50768287?locationNum=15&fps=12. 想知道为什么如此配置数据源吗?请看:https://blog.csdn.net/sanyuedexuanlv/article/details/513312093. https://www.cnblogs.com/luodengxiong/p/6766357.html</font>

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