Java EE Netbeans Maven EJB模块（MySQL）错误

我正在使用Netbeans 7.3.1和glassfish 4.0。我创建了一个简单的Maven EJB项目。我试图做的只是从我的表（MySQL数据库）中删除一行。 我不断地发现这个错误：

    Error occurred during deployment: Exception while loading the app : javax.ejb.CreateException: Initialization failed for Singleton MyTester. Please see server.log for more details.
The module has not been deployed.
See the server log for details.
    at org.netbeans.modules.j2ee.deployment.devmodules.api.Deployment.deploy(Deployment.java:210)
    at org.netbeans.modules.maven.j2ee.ExecutionChecker.performDeploy(ExecutionChecker.java:178)
    at org.netbeans.modules.maven.j2ee.ExecutionChecker.executionResult(ExecutionChecker.java:130)
    at org.netbeans.modules.maven.execute.MavenCommandLineExecutor.run(MavenCommandLineExecutor.java:212)
    at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:153)

会话Bean：

package com.mycompany.myapp1;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.PostConstruct;
import javax.ejb.Stateless;
import javax.ejb.LocalBean;
import javax.ejb.Singleton;
import javax.ejb.Startup;
import javax.ejb.Stateful;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.apache.commons.io.IOUtils;

@Singleton
@LocalBean
@Startup
public class MyTester {

@PersistenceContext(name="com.mycompany_myApp1_ejb_1.0-SNAPSHOTPU")
EntityManager em;
    @PostConstruct
    public void myMain(){
        Staff staff = em.find(Staff.class, 5);
        System.out.println("deleting...");
        em.remove(staff);
    }
}

Staff.java：

package com.mycompany.myapp1;

import java.io.Serializable;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Lob;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import javax.validation.constraints.Size;

@Entity
public class Staff implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer staffId;

    private String name;
    @Column(name = "age")
    private Integer age;

    private String gender;
    @Column(name = "salary")
    private Integer salary;

    @Lob
    private byte[] pic;

    public byte[] getPic() {
        return pic;
    }

    public void setPic(byte[] pic) {
        this.pic = pic;
    }

    public Staff() {
    }

    public Staff(Integer staffId) {
        this.staffId = staffId;
    }

    public Integer getStaffId() {
        return staffId;
    }

    public void setStaffId(Integer staffId) {
        this.staffId = staffId;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public Integer getSalary() {
        return salary;
    }

    public void setSalary(Integer salary) {
        this.salary = salary;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (staffId != null ? staffId.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Staff)) {
            return false;
        }
        Staff other = (Staff) object;
        if ((this.staffId == null && other.staffId != null) || (this.staffId != null && !this.staffId.equals(other.staffId))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "com.mycompany.myapp1.Staff[ staffId=" + staffId + " ]";
    }

    void getGender(String m) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

}

POM：

我没有错误，一切正常，我在数据库中看到结果！请帮忙。

---

另外，若我将状态从@Singleton更改为@Stateless或@Stateful，则不会出现错误，但数据库不会更改。发生了什么事

今天我再次尝试运行我的应用程序。在我点击run之后，Netbeans开始下载一些东西。结果证明一切都很好！我得到一个警告：

WARNING:   Class 'javax.ejb.PostActivate' not found, interception based on it is not enabled

---

但我的应用程序已成功部署，记录已从表中删除！这真的很奇怪，但重新启动netbeans解决了问题。

似乎是您的部署未成功。您是否检查了server.log文件中是否存在任何其他错误，如异常所示？。日志非常长。开始：

警告：本地异常堆栈：异常[EclipseLink-4002]（Eclipse Persistence Services-2.5.0.v20130507-3faac2b）：org.Eclipse.Persistence.exceptions.DatabaseException内部异常：com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException:字段列表中的未知列'STAFFID'错误代码：1054调用：选择STAFFID、年龄、性别、姓名、PIC、员工薪酬，其中（STAFFID=？）bind=>[1参数绑定]查询：ReadObjectQuery（name=“readStaff”referenceClass=Staff sql=“选择员工、年龄、性别、姓名、PIC、来自员工的工资，其中（员工=？）””

<?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.mycompany_myApp1_ejb_1.0-SNAPSHOTPU" transaction-type="JTA">
    <jta-data-source>asas</jta-data-source>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties/>
  </persistence-unit>
</persistence>

public void myMain(){
Staff staff = new Staff();
staff.setName("John");
staff.setAge(22);
em.persist(staff);
}

WARNING:   Class 'javax.ejb.PostActivate' not found, interception based on it is not enabled