我正在尝试使用hyperjaxb生成JPA带注释的java类,但遇到了一个问题。欢迎任何建议: -
部分..Pom.xml
<!-- hyperjaxb -->
<dependency>
<groupId>org.jvnet.jaxb2_commons</groupId>
<artifactId>jaxb2-basics-runtime</artifactId>
<version>0.6.4</version>
</dependency>
<dependency>
<groupId>org.jvnet.hyperjaxb3</groupId>
<artifactId>maven-hyperjaxb3-plugin</artifactId>
<version>0.5.6</version>
</dependency>
...
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.jvnet.hyperjaxb3</groupId>
<artifactId>maven-hyperjaxb3-plugin</artifactId>
<version>0.5.6</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
<executions>
<execution>
<id>1</id>
<goals>
<goal>generate</goal>
</goals>
<configuration>
<forceRegenerate>true</forceRegenerate>
<schemaDirectory>${basedir}/src/main/resources/schemas/demo</schemaDirectory>
<schemaIncludes>
<schemaInclude>demo.xsd</schemaInclude>
</schemaIncludes>
<generatePackage>com.fsi.demo</generatePackage>
<strict>true</strict>
<extension>true</extension>
</configuration>
</execution>
</executions>
</plugin>
这是demo.xsd: -
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="demo">
<xs:complexType>
<xs:sequence>
<xs:element ref="playerID" />
<xs:element ref="G"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="playerID" type="xs:string" />
<xs:element name="G" type="xs:string" />
</xs:schema>
这是生成的java类
public class Demo
implements Equals, HashCode
{
@XmlElement(required = true)
protected String playerID;
@XmlElement(name = "G", required = true)
protected String g;
@XmlAttribute(name = "Hjid")
protected Long hjid;
....
...
/**
* Gets the value of the g property.
*
* @return
* possible object is
* {@link String }
*
*/
@Basic
@Column(name = "G_", length = 255)
public String getG() {
return g;
}
/**
* Sets the value of the g property.
*
* @param value
* allowed object is
* {@link String }
*
*/
public void setG(String value) {
this.g = value;
}
}
额外的下划线 @Column(name =“G_”,length = 255) 因为hibernate抱怨无效列映射而破坏了我的代码。
到目前为止我尝试了什么,这对问题没有影响: - 1)demo.xsd中的内联自定义绑定
<xs:annotation>
<xs:appinfo>
<jxb:property name="G" />
</xs:appinfo>
</xs:annotation>
和
<xs:annotation>
<xs:appinfo>
<orm:attribute-override name="G">
<orm:column name="G" />
</orm:attribute-override>
</xs:appinfo>
</xs:annotation>
我在这里想念的是什么,有人请!
更新: 下面的Hibernate查询: - 休眠:
选择 demo0_.PLAYERID为PLAYERID1_0_, demo0_.G_为G_2_0_ 从 DEMO demo0_ 哪里 demo0_.PLAYERID in( ? )
跟踪:
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'demo0_.G_' in 'field list'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
并正确地将实际列 G 而非 G _ 由hyperjaxb生成,将其更改为G(手动)可以解决此问题
答案 0 :(得分:0)
根据我的经验,如果该列的名称是任何SQL方言中的保留字,Hyperjaxb会在列的末尾添加下划线(我怀疑是一个表?)名称。
E.g。我们使用的是SQL Server,我们的XML源有一个名为VALUE的属性。当它作为数据库中的列创建时,它被称为VALUE _
VALUE实际上并不是T-SQL(SQL Server)中的保留字,但它位于Pl / SQL(Oracle)中。我猜想NAME是某个SQL方言中的保留字!
我已经覆盖了绑定文件中的列名,以解决这个问题:)
希望有所帮助!
编辑包含绑定切割的示例:
这是我重命名表的示例,因为它在末尾有一个下划线:
<!-- Make table name 'INSTANCE' rather than 'INSTANCE_' -->
<jaxb:bindings node="xs:element[@name='Instance']//xs:complexType">
<hj:entity>
<orm:table name="INSTANCE" />
</hj:entity>
</jaxb:bindings>
以下是重命名列的示例:
<!-- Make PeriodStart and PeriodEnd columns have the right name (instead of PeriodEndItem -->
<jaxb:bindings node="xs:element[@name='InstancePeriod']//xs:complexType//xs:sequence//xs:element[@ref='PERIODEND']">
<hj:basic>
<orm:column name="PERIODEND" />
</hj:basic>
</jaxb:bindings>