如何使用Liquibase

Maven配置信息，大部分配置可以通过命令行参数获得

           <plugin>
                <groupId>org.liquibasegroupId>
                <artifactId>liquibase-maven-pluginartifactId>
                <version>${liquibase.version}version>
                <configuration>
                    <changeLogFile>resources/config/liquibase/master.xmlchangeLogFile>
                    
                    <driver>com.mysql.jdbc.Driverdriver>
                    <url>jdbc:mysql://localhost:3306/entranceguard?useUnicode=true&characterEncoding=utf8url>
                    <defaultSchemaName>entranceguarddefaultSchemaName>
                    <username>rootusername>
                    <password>rootpassword>
                    <referenceUrl>jdbc:mysql://localhost:3306/entranceguard2?useUnicode=true&characterEncoding=utf8referenceUrl>
                    <referenceUsername>rootreferenceUsername>
                    <referencePassword>rootreferencePassword>
                    
                    
                    
                    <referenceDefaultSchemaName>entranceguard2referenceDefaultSchemaName>
                    <verbose>trueverbose>
                    <logging>debuglogging>
                configuration>
                <dependencies>
                    <dependency>
                        <groupId>org.javassistgroupId>
                        <artifactId>javassistartifactId>
                        <version>3.18.2-GAversion>
                    dependency>
                    <dependency>
                        <groupId>org.liquibase.extgroupId>
                        <artifactId>liquibase-hibernate4artifactId>
                        <version>${liquibase-hibernate4.version}version>
                    dependency>
                    <dependency>
                        <groupId>org.springframework.bootgroupId>
                        <artifactId>spring-boot-starter-data-jpaartifactId>
                        <version>1.3.1.RELEASEversion>
                    dependency>
                dependencies>
            plugin>

通过maven命令行传递参数， 参数形式如下所示

mvn liquibase:rollback -Dliquibase.rollbackTag=T4

http://www.liquibase.org/documentation/maven/generated/update-mojo.html#changeLogFile

直接在命令行调用liquibase

java -jar /xxx/liquibase-core.jar
--driver=com.mysql.jdbc.Driver
--classpath=/opt/temp/mysql.jar
--url="jdbc:mysql://localhost:3306/entranceguard?useUnicode=true&characterEncoding=utf8"
--changeLogFile=/Users/yejianxin/workspace_hs_saas_all/hs-dms/hs-dms-database/resources/config/liquibase/master.xml
--username=root
--password=root
rollback
Release0100-2

主要流程是这样的，

1. 通过运行update将所有变更导入到数据库，
2. 通过tag命令进行更新标记 如果要rollback，
3. 则可以根据时间或tag进行回滚

数据库脚本可以通过XML或sql形式存放，一般结构如下

master.xml文件是总文件，它会include其他需要执行的文件。 注意路径，可以用相对路径，只要将relativeToChangelogFile设为”true”

<databaseChangeLog
        xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.4.xsd">

    <include file="./changelog/0100_20160217_01_init.sql" relativeToChangelogFile="true"/>
    <include file="./changelog/0100_20160219_01_addtable.sql" relativeToChangelogFile="true"/>
    <include file="./changelog/initdata/HS_PLATFORM_SYS_CONFIG.sql" relativeToChangelogFile="true"/>
    <include file="./changelog/initdata/HS_PLATFORM_SYS_DICT.sql" relativeToChangelogFile="true"/>
    <include file="./changelog/initdata/HS_PLATFORM_SYS_LABEL.sql" relativeToChangelogFile="true"/>
databaseChangeLog>

在SQL文件里，必须加上头标签如下所示

--liquibase formatted sql
--changeset JasonYe:Release0100-1
update table1 set column1=333;
--rollback delete from table1 where column1=333;