Java 正在尝试为位数据收缩VARCHAR（）；（未显示二进制数据值）'；到长度255

我有一个

市场

实体作为

@Entity
public class Market extends MutableEntity {

    @Column(nullable = false)
    private String name;
    @Column
    private String description;
    @Embedded
    private Version marketVersion; // snipped

@Embeddable
public class Version {
    private double versionNumber;
    private VersionType versionType;
    private DateTime publishedOn;
    private DateTime retiredOn;
    private double parentVersionNumber; //snipped

和

版本

实体为

@Entity
public class Market extends MutableEntity {

    @Column(nullable = false)
    private String name;
    @Column
    private String description;
    @Embedded
    private Version marketVersion; // snipped

@Embeddable
public class Version {
    private double versionNumber;
    private VersionType versionType;
    private DateTime publishedOn;
    private DateTime retiredOn;
    private double parentVersionNumber; //snipped

当我尝试测试以下内容时，它失败了

   @Test
    public void testCloneMarket() {
        final String name = "testCloneMarket";
        final String description = "testCloneMarket";
        final Market existingMarket = new MarketManager(crudService).addMarket(name, description);

        // publish market
        existingMarket.getMarketVersion().setPublishedOn(new DateTime()); // fails here


        assertNotNull(existingMarket);
    }

我认为错误是错误的

testCloneMarket(com.myorg.project.versioning.business.MarketManagerTest)  Time elapsed: 4.11 sec  <<< ERROR!
javax.persistence.RollbackException: Error while committing the transaction
    at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:90)
    at com.myorg.toolkit.commons.persistence_testing.rules.JpaRule.commitOrRollbackTransaction(JpaRule.java:220)
    at com.myorg.toolkit.commons.persistence_testing.rules.JpaRule.changeTransaction(JpaRule.java:155)
    at com.myorg.project.versioning.business.MarketManagerTest.testCloneMarket(MarketManagerTest.java:63)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
    at org.junit.rules.RunRules.evaluate(RunRules.java:20)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
    at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
    at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
    at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
    at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
    at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
    at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.DataException: A truncation error was encountered trying to shrink VARCHAR () FOR BIT DATA '(Binary data value not displayed)' to length 255.

---

testCloneMarket（com.myorg.project.versioning.business.MarketManagerTest）运行时间：4.11秒我找不到
setPublishedOn
的源代码

试试看

DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
Date date = new Date();
existingMarket.getMarketVersion().setPublishedOn(dateFormat.format(date));

还不清楚哪一列出现截断错误

您可以通过完全展开异常链来尝试从异常链获取更多信息：

或者，如果您可以找到derby.log文件，并且可以使用-Dderby.language.logStatementText=true运行应用程序，您应该能够看到更多详细信息

Derby数据类型支持最长为32672字节的指定长度。没有默认长度，因此256字节的长度必须是您在应用程序或用于实现持久层的框架中设置的

如果您能够找出持久层生成表架构的位置，那么您应该能够覆盖它，并为VARCHAR for BIT DATA列选择不同的长度。
您可以发布您加载到数据库中的
.sql
吗？@Vakimshaar，我在哪里可以找到它？我是新手，请告诉我