java没有名为wspersist的EntityManager的持久性提供程序

1 年，3 月 Questions & Answers 2374

我正在构建一个JAX-RS web服务（Jersey），现在我正尝试开始使用JPA。我选择了eclipselink来管理这种持久性

首先，我正在编写一些junit测试用例，直到我弄清楚所有东西是如何结合在一起的

在我的坚持中。xml（WEB-INF/persistence.xml）我有：

<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0" xmlns="http://java.sun.com/xml/ns/persistence">
<persistence-unit name="ws-persist" transaction-type="RESOURCE_LOCAL">
    <class>beans.Change</class>
    <properties>
        <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
        <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3333/tomcat" />
        <property name="javax.persistence.jdbc.user" value="tomcat" />
        <property name="javax.persistence.jdbc.password" value="...." />
        <property name="eclipselink.ddl-generation" value="create-tables" />
        <property name="eclipselink.ddl-generation.output-mode" value="database" />
    </properties>
</persistence-unit>

在我的测试课上我有

public class PersistenceTests {

private EntityManager em = null;

@Before
public void setUp() throws Exception {      
    Properties propertiesMap = new Properties();
    propertiesMap.put(PersistenceUnitProperties.DDL_GENERATION, PersistenceUnitProperties.DROP_AND_CREATE);

    EntityManagerFactory  factory = Persistence.createEntityManagerFactory("ws-persist", propertiesMap);
    em = factory.createEntityManager();
}

@After
public void tearDown() throws Exception {
}

@Test
public void testSetUp(){
    Assert.assertNotNull("Entity manager was null", em);
    Assert.assertTrue("Entity manager wasn't connected", em.isOpen());
}
}

我有日食。jar和两个javax。持久性*。我的WEB-INF/lib文件夹下的JAR。我在标题中遇到了一个异常，有人能帮我解决这个问题吗

谢谢

Python中文网

有 Java 编程相关的问题?

java没有名为wspersist的EntityManager的持久性提供程序

共 (1) 个答案

# 1 楼答案