Tips:
springboot版本：2.0.8.RELEASE
jdk：1.8

在使用JPA的時(shí)候，show-sql顯示不是那么友好，為了得到可執(zhí)行的SQL語句，找到了p6spy這個(gè)工具。網(wǎng)上很多版本老舊，在新版中會(huì)出現(xiàn)各種報(bào)錯(cuò)，所以整理了個(gè)工具，希望能快速幫到大家，避免走彎路。 至于為什么有這個(gè)需求，一個(gè)是因?yàn)镴PA打印出來很多？號(hào)，不能進(jìn)行參數(shù)替換，還有就是因?yàn)閼?，巨懶?/p>

1. 導(dǎo)入maven依賴

<dependency>
    <groupId>p6spy</groupId>
    <artifactId>p6spy</artifactId>
    <version>3.8.6</version>
</dependency>

2. 修改數(shù)據(jù)源配置，只需更改driver-class-name和url,以pg,mysql為例

pg

spring:
  datasource:
#    driver-class-name: org.postgresql.Driver
    driver-class-name: com.p6spy.engine.spy.P6SpyDriver
#    url: jdbc:postgresql://localhost:5432/postgres
    url: jdbc:p6spy:postgresql://localhost:5432/postgres
    username: postgres
    password: 123456

mysql

spring:
  datasource:
    url: jdbc:p6spy:mysql://localhost:3306/xxx?useUnicode=true&useSSL=false&serverTimezone=UTC
    username: root
    password: 123456
    driver-class-name: com.p6spy.engine.spy.P6SpyDriver

3.新增配置 spy.properties 到resources下

logMessageFormat=com.p6spy.engine.spy.appender.CustomLineFormat
customLogMessageFormat=sql -> %(sqlSingleLine)
appender=com.p6spy.engine.spy.appender.StdoutLogger
#appender=com.p6spy.engine.spy.appender.FileLogger
#appender=com.p6spy.engine.spy.appender.Slf4JLogger
#customLogMessageFormat=%(sqlSingleLine)
#customLogMessageFormat=%(currentTime)|%(executionTime)|%(category)|connection%(connectionId)|%(sqlSingleLine)

這里只是為了快速得到一個(gè)可執(zhí)行的SQL，更高級(jí)的用法還請(qǐng)自行研究，哈哈。

給出一個(gè)JPA結(jié)合p6spy打印SQL的例子。感覺不錯(cuò)點(diǎn)個(gè)贊吧。

sql -> drop table if exists book cascade
sql -> create table book (id  serial not null, author varchar(255), name varchar(255), time time, primary key (id))
sql -> insert into book (author, name, time) values ('1', '1', '2019-12-02T10:53:23.941+0800')
sql -> select currval('book_id_seq')
sql -> insert into book (author, name, time) values ('2', '2', '2019-12-02T10:53:23.941+0800')
sql -> select currval('book_id_seq')
sql -> insert into book (author, name, time) values ('3', '3', '2019-12-02T10:53:23.941+0800')
sql -> select currval('book_id_seq')
sql -> insert into book (author, name, time) values ('4', '4', '2019-12-02T10:53:23.941+0800')
sql -> select currval('book_id_seq')
sql -> select book0_.id as id1_0_, book0_.author as author2_0_, book0_.name as name3_0_, book0_.time as time4_0_ from book book0_ where book0_.author='1' and book0_.name='1'