H2 DB - hibernate的實例 - 無法從資源解析映射文檔

Question

*以下每個文件都在同一個位置*

錯誤：

 

    SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". 
    SLF4J: Defaulting to no-operation (NOP) logger implementation 
    SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. 
org.hibernate.InvalidMappingException: Could not parse mapping document from resource ./employee.hbm.xml 
    at org.hibernate.cfg.Configuration.addResource(Configuration.java:616) 
    at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1635) 
    at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1603) 
    at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1582) 
    at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1556) 
    at org.hibernate.cfg.Configuration.configure(Configuration.java:1476) 
    at org.hibernate.cfg.Configuration.configure(Configuration.java:1462) 
    at com.yahoo.hibernatelearning.FirstExample.main(FirstExample.java:19) 
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from input stream 
    at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:555) 
    at org.hibernate.cfg.Configuration.addResource(Configuration.java:613) 
    ... 7 more 
Caused by: org.dom4j.DocumentException: http://hibernate.sourceforge.net/%0Ahibernate-mapping-3.0.dtd Nested exception: http://hibernate.sourceforge.net/%0Ahibernate-mapping-3.0.dtd 
    at org.dom4j.io.SAXReader.read(SAXReader.java:484) 
    at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:546) 
    ... 8 more 
Exception in thread "main" java.lang.NullPointerException 
    at com.yahoo.hibernatelearning.FirstExample.main(FirstExample.java:33) 

Hibernate的配置：hibernate.cfg.xml的

<?xml version='1.0' encoding='utf-8'?> 
<!DOCTYPE hibernate-configuration PUBLIC 
"-//Hibernate/Hibernate Configuration DTD//EN" 
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration> 
<session-factory> 
<property name="hibernate.connection.driver_class">org.h2.Driver</property> 
<property name="hibernate.connection.url">jdbc:h2:./db/repository</property> 
<property name="hibernate.connection.username">sa</property> 
<property name="hibernate.connection.password"></property> 
<property name="hibernate.default_schema">PUBLIC</property> 
<property name="hibernate.dialect">org.hibernate.dialect.H2Dialect</property> 
<property name="hibernate.show_sql">true</property> 
<property name="hibernate.hbm2ddl.auto">update</property> 
<!-- Mapping files --> 
<mapping resource="./employee.hbm.xml"/> 
</session-factory> 
</hibernate-configuration> 

映射配置：employee.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"> 
<hibernate-mapping> 
<class name="com.yahoo.hibernatelearning.Employee" table="employee"> 
<id name="empId" type="int" column="emp_id" > 
<generator class="native"/> 
</id> 
<property name="empName"> 
<column name="emp_name" /> 
</property> 
<property name="empSal"> 
<column name="emp_sal" /> 
</property> 
</class> 
</hibernate-mapping> 

映射類：Employee.java

 

    package com.yahoo.hibernatelearning; 

    public class Employee { 

     private int empId; 
     private String empName; 
     private int empSal; 

     public int getEmpId() { 
      return empId; 
     } 

     public void setEmpId(int empId) { 
      this.empId = empId; 
     } 

     public String getEmpName() { 
      return empName; 
     } 

     public void setEmpName(String empName) { 
     this.empName = empName; 
     } 

     public int getEmpSal() { 
      return empSal; 
     } 

     public void setEmpSal(int empSal) { 
      this.empSal = empSal; 
     } 

    } 

代碼：FirstExample.java

 

    package com.yahoo.hibernatelearning; 

    import org.hibernate.Session; 
    import org.hibernate.SessionFactory; 
    import org.hibernate.Transaction; 
    import org.hibernate.cfg.Configuration; 

    public class FirstExample { 

    /** 
    * @param args 
    */ 
    public static void main(String[] args) { 
    // TODO Auto-generated method stub 

    Session sess = null; 
    Transaction tran = null; 
    try{ 
    SessionFactory sessFact = new Configuration().configure().buildSessionFactory(); 
    sess = sessFact.openSession(); 
    System.out.println("Session: "+ sess); 
    tran = sess.beginTransaction(); 
    Employee emp = new Employee(); 
    emp.setEmpName("Birendra Kumar"); 
    emp.setEmpSal(12000); 
    sess.save(emp); 
    tran.commit(); 
    } 
    catch(Exception ex){ 
    ex.printStackTrace(); 
    } 
    finally{ 
    sess.close(); 
    } 

    } 

    } 

Answer 1

%0A告訴問題是http://hibernate.sourceforge.net/和hibernate-mapping-3.0.dtd之間換行。

問題是通過去除換行解決：

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"