我有一个使用Maven构建的应用程序,并具有以下模块结构
<modules>
<module>ProjectMonkeybutler-ear</module>
<module>ProjectMonkeybutler-ejb</module>
<module>ProjectMonkeybutler-web</module>
<module>ProjectMonkeybutler-persistence</module>
</modules>
我想@Inject我的BoothService类,它有一个EntityManager来保存我的对象。 BoothService类始终为null,并且永远不会被应用程序服务器(GF 4.0)注入。
package com.skb.monkeybutler.persistence.service;
import com.skb.monkeybutler.persistence.entity.Booth;
import java.io.Serializable;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ejb.Stateless;
import javax.inject.Named;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
@Named("BoothService")
public class BoothService implements Serializable {
private static final Logger LOGGER = Logger.getLogger(BoothService.class.getName());
@PersistenceContext
protected EntityManager entityManager;
public BoothService() {
if(entityManager == null){
LOGGER.info("EntityManger is null");
}
}
protected EntityManager getEntityManager() {
return entityManager;
}
public void persist(final Booth entity) {
LOGGER.log(Level.INFO, "Persist {0}", entity);
this.getEntityManager().persist(entity);
LOGGER.log(Level.INFO, "Persisted");
}
}
Web项目中的我的Controller类:
package com.skb.monkeybutler.web;
import java.io.Serializable;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.enterprise.context.SessionScoped;
import javax.inject.Inject;
import javax.inject.Named;
@SessionScoped
@Named
public class CompanyRegistrationController implements Serializable {
@Inject
private @Named("BoothService") BoothService bs;
public CompanyRegistrationController() {
if(bs == null){ LOGGER.info("BoothService is null"); }
}
}
我的持久性xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
<persistence-unit name="com.skb_ProjectMonkeybutler-persistence_ejb_1.0-SNAPSHOTPU" transaction-type="JTA">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<jta-data-source>jdbc/jeedb</jta-data-source>
<class>com.skb.monkeybutler.persistence.entity.Companydata</class>
<class>com.skb.monkeybutler.persistence.entity.CompanyEquipment</class>
<class>com.skb.monkeybutler.persistence.entity.Studycourse</class>
<class>com.skb.monkeybutler.persistence.entity.Booth</class>
<class>com.skb.monkeybutler.persistence.entity.Setuptimeslot</class>
<class>com.skb.monkeybutler.persistence.entity.Company</class>
<class>com.skb.monkeybutler.persistence.entity.Volunteer</class>
<class>com.skb.monkeybutler.persistence.entity.Servicepackage</class>
<class>com.skb.monkeybutler.persistence.entity.Billingaddress</class>
<class>com.skb.monkeybutler.persistence.entity.Equipment</class>
<class>com.skb.monkeybutler.persistence.entity.Faculty</class>
<class>com.skb.monkeybutler.persistence.entity.Team</class>
<class>com.skb.monkeybutler.persistence.entity.Vacancy</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="javax.persistence.schema-generation.database.action" value="none"/>
<property name="eclipselink.ddl-generation" value="none"/>
<property name="eclipselink.logging.level" value="FINE"/>
<property name="eclipselink.ddl-generation.output-mode" value="both"/>
<!-- turn on fine logging: -->
<property name="eclipselink.logging.level.sql" value="FINE"/>
<property name="eclipselink.logging.parameters" value="true"/>
<property name="eclipselink.logging.exceptions" value="true"/>
</properties>
</persistence-unit>
</persistence>
答案 0 :(得分:0)
注入的字段在构造函数中为null。它们是在创建对象后注入的。使用@PostConstruct
注释定义方法并在那里测试注入的字段
您还可以尝试使用BoothService
注释注入@EJB
。