在Spring Boot，Spring Data JPA项目中，我有一个名为Country的实体类，其中列很少。我生成了更改日志并使用以下命令应用了它
$ mvn process-test-resources
$ mvn process-resources
和 liquibase-hibernate5 插件创建表
国家.java
package com.liquibasedemo.model;
import com.fasterxml.jackson.annotation.JsonIgnore;
import lombok.Data;
import javax.persistence.*;
@Entity
@Table(name = "country")
@Data
public class Country
{
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "name")
private String name;
@Column(name = "code")
private String code;
@Column(name = "iso_code")
private String isoCode;
@Column(name = "test_code")
private String testCode;
@ManyToOne
@JoinColumn(name = "region_id")
@JsonIgnore
private Region region;
}
我在国家/地区类中testCode列数据类型从长更新为字符串，并使用上述命令生成变更集。应用变更集后，数据类型保持不变。这是pom.xml文件
绒球.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com</groupId>
<artifactId>liquibasedemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>liquibasedemo</name>
<description>Liquibase Demo project with Spring Boot and Spring Data</description>
<properties>
<spring-boot.version>2.1.5.RELEASE</spring-boot.version>
<hibernate.version>5.4.3.Final</hibernate.version>
<liquibase-maven-plugin.version>3.5.5</liquibase-maven-plugin.version>
<liquibase-hibernate5.version>3.6</liquibase-hibernate5.version>
<validation-api.version>2.0.1.Final</validation-api.version>
<javassist.version>3.24.0-GA</javassist.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-envers</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-maven-plugin</artifactId>
<version>${liquibase-maven-plugin.version}</version>
<configuration>
<propertyFile>src/main/resources/liquibase.properties</propertyFile>
<changeLogFile>src/main/resources/db/db.changelog-master.xml</changeLogFile>
<diffChangeLogFile>src/main/resources/db/changelog/${maven.build.timestamp}_changelog.xml</diffChangeLogFile>
<logging>info</logging>
</configuration>
<executions>
<execution>
<id>update-profile</id>
<phase>process-resources</phase>
<goals>
<goal>update</goal>
</goals>
</execution>
<execution>
<id>diff-profile</id>
<phase>process-test-resources</phase>
<goals>
<goal>diff</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.liquibase.ext</groupId>
<artifactId>liquibase-hibernate5</artifactId>
<version>${liquibase-hibernate5.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>${spring-boot.version}</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>${validation-api.version}</version>
</dependency>
<dependency>
<groupId>org.javassist</groupId>
<artifactId>javassist</artifactId>
<version>${javassist.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
> 使用 liquibase-hibernate5 的这一代变更集不包括字段类型更改。如果您可以看到changeset文件，您将找不到有关字段类型更改生成的changeset。liquibase-hibernate5插件似乎不支持它。
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看看这门课的评论
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该插件的开发人员正在链接中讨论它
这些往往被忽略的原因是因为休眠 表示数据类型通常不同于数据库的方式 表示数据类型，即使它们实际上是相同的。我是 寻找使用 Liquibase 4 改善这一点的方法。
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现在的解决方案是手动添加
diff。以下代码取自链接<changeSet author="liquibase-docs" id="modifyDataType-example"> <modifyDataType catalogName="cat" columnName="id" newDataType="int" schemaName="public" tableName="person"/> </changeSet>
你可以将
ChangeSet添加到你的xml文件中(如果你使用的是xml而不是yaml或其他文件类型(。
<changeSet id="change type" author="me">
<modifyDataType tableName="Country" columnName="name"
newDataType="VARCHAR(255)"/>
</changeSet>
有关添加，重命名和删除列的更多信息，您可以查看此链接：Liquibase 弹簧引导维护数据库架构更改我希望这是有帮助的