我对Hibernate不熟悉。任何人都可以帮我解决我在代码中遇到的错误。
我正在使用Eclipse Helios，Hibernate 3＆amp; Java 6.我已经从数据库表Emp生成了Java代码，Dept通过逆向工程使用Jboss Hibernate插件。
还包括项目中所有必需的jar文件。
生成的类和配置文件类似：
Emp.java
package generatedcode;
import java.math.BigDecimal;
import java.util.Date;
import java.util.HashSet;
import java.util.Set;
public class Emp implements java.io.Serializable
{
private short empno;
private Emp emp;
private Dept dept;
private String ename;
private String job;
private Date hiredate;
private BigDecimal sal;
private BigDecimal comm;
private Set emps = new HashSet(0);
public Emp() {
}
public Emp(short empno) {
this.empno = empno;
}
public Emp(short empno, Emp emp, Dept dept, String ename, String job,
Date hiredate, BigDecimal sal, BigDecimal comm, Set emps) {
this.empno = empno;
this.emp = emp;
this.dept = dept;
this.ename = ename;
this.job = job;
this.hiredate = hiredate;
this.sal = sal;
this.comm = comm;
this.emps = emps;
}
public short getEmpno() {
return this.empno;
}
public void setEmpno(short empno) {
this.empno = empno;
}
public Emp getEmp() {
return this.emp;
}
public void setEmp(Emp emp) {
this.emp = emp;
}
public Dept getDept() {
return this.dept;
}
public void setDept(Dept dept) {
this.dept = dept;
}
public String getEname() {
return this.ename;
}
public void setEname(String ename) {
this.ename = ename;
}
public String getJob() {
return this.job;
}
public void setJob(String job) {
this.job = job;
}
public Date getHiredate() {
return this.hiredate;
}
public void setHiredate(Date hiredate) {
this.hiredate = hiredate;
}
public BigDecimal getSal() {
return this.sal;
}
public void setSal(BigDecimal sal) {
this.sal = sal;
}
public BigDecimal getComm() {
return this.comm;
}
public void setComm(BigDecimal comm) {
this.comm = comm;
}
public Set getEmps() {
return this.emps;
}
public void setEmps(Set emps) {
this.emps = emps;
}
}
Dept.java
package generatedcode;
import java.util.HashSet;
import java.util.Set;
public class Dept implements java.io.Serializable {
private byte deptno;
private String dname;
private String loc;
private Set emps = new HashSet(0);
public Dept() {
}
public Dept(byte deptno) {
this.deptno = deptno;
}
public Dept(byte deptno, String dname, String loc, Set emps) {
this.deptno = deptno;
this.dname = dname;
this.loc = loc;
this.emps = emps;
}
public byte getDeptno() {
return this.deptno;
}
public void setDeptno(byte deptno) {
this.deptno = deptno;
}
public String getDname() {
return this.dname;
}
public void setDname(String dname) {
this.dname = dname;
}
public String getLoc() {
return this.loc;
}
public void setLoc(String loc) {
this.loc = loc;
}
public Set getEmps() {
return this.emps;
}
public void setEmps(Set emps) {
this.emps = emps;
}
}
hibernate.cfg.xml中
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="hibernate.connection.url">jdbc:oracle:thin:@myserver:1521:xe</property>
<property name="hibernate.connection.username">user</property>
<property name="hibernate.connection.password">pass</property>
<property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property>
<mapping resource="Emp.hbm.xml"/>
<mapping resource="Dept.hbm.xml"/>
</session-factory>
</hibernate-configuration>
Emp.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Sep 20, 2016 7:06:48 PM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="Emp" table="EMP" schema="TTRAK1">
<id name="empno" type="short">
<column name="EMPNO" precision="4" scale="0" />
<generator class="assigned" />
</id>
<many-to-one name="emp" class="Emp" fetch="select">
<column name="MGR" precision="4" scale="0" />
</many-to-one>
<many-to-one name="dept" class="Dept" fetch="select">
<column name="DEPTNO" precision="2" scale="0" />
</many-to-one>
<property name="ename" type="string">
<column name="ENAME" length="10" />
</property>
<property name="job" type="string">
<column name="JOB" length="9" />
</property>
<property name="hiredate" type="date">
<column name="HIREDATE" length="7" />
</property>
<property name="sal" type="big_decimal">
<column name="SAL" precision="7" />
</property>
<property name="comm" type="big_decimal">
<column name="COMM" precision="7" />
</property>
<set name="emps" table="EMP" inverse="true" lazy="true" fetch="select">
<key>
<column name="MGR" precision="4" scale="0" />
</key>
<one-to-many class="Emp" />
</set>
</class>
</hibernate-mapping>
Dept.hbm.xml
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Sep 20, 2016 7:06:48 PM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="Dept" table="DEPT" schema="TTRAK1">
<id name="deptno" type="byte">
<column name="DEPTNO" precision="2" scale="0" />
<generator class="assigned" />
</id>
<property name="dname" type="string">
<column name="DNAME" length="14" />
</property>
<property name="loc" type="string">
<column name="LOC" length="13" />
</property>
<set name="emps" table="EMP" inverse="true" lazy="true" fetch="select">
<key>
<column name="DEPTNO" precision="2" scale="0" />
</key>
<one-to-many class="Emp" />
</set>
</class>
</hibernate-mapping>
Test.java
package test;
import generatedcode.Emp;
import java.util.List;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.*;
public class Test
{
public static void main(String args[])
{
Configuration configuration=new Configuration();
SessionFactory sf=configuration.configure().buildSessionFactory();
Session session=sf.openSession();
session.beginTransaction();
Query query=session.createQuery("from Emp");
List<Emp> empList=query.list();
for(Emp emp:empList)
{
System.out.println("Employee "+emp.getEmpno()+" , "+emp.getEname());
}
session.close();
}
}
我得到的例外是：
线程中的异常＆＃34; main＆＃34; org.hibernate.HibernateException：无法解析配置：/hibernate.cfg.xml 在org.hibernate.cfg.Configuration.doConfigure（Configuration.java:1491） 在org.hibernate.cfg.Configuration.configure（Configuration.java:1425） 在org.hibernate.cfg.Configuration.configure（Configuration.java:1411） at test.EmpDAO.main（EmpDAO.java:19） 引起：org.dom4j.DocumentException：连接被拒绝：连接嵌套异常：连接被拒绝：连接 在org.dom4j.io.SAXReader.read（SAXReader.java:484） 在org.hibernate.cfg.Configuration.doConfigure（Configuration.java:1481） ......还有3个
任何人都可以在代码中向我提供有关异常或任何建议的描述吗？
答案 0 :(得分：0)
感谢Pradeep的帮助。通过在我的本地系统上下载dtd文件“http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd”和“http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd”并给出参考来解决错误。可能是错误是由于防火墙或我的系统上的防病毒软件拒绝访问dtd URL。