Unable to read XML!!!!!!!!!!!!!!!!!
錯誤提示如下：
%%%% Error Creating SessionFactory %%%%
org.hibernate.InvalidMappingException: Unable to read XML
at org.hibernate.internal.util.xml.MappingReader.readMappingDocument(MappingReader.java:109)
at org.hibernate.cfg.Configuration.add(Configuration.java:478)
at org.hibernate.cfg.Configuration.add(Configuration.java:474)
at org.hibernate.cfg.Configuration.add(Configuration.java:647)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:730)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2109)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2081)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2061)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2014)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1929)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1908)
at factory.HibernateSessionFactory.<clinit>(HibernateSessionFactory.java:32)
at org.apache.jsp.validate_jsp._jspService(validate_jsp.java:132)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:94)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1132)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1539)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1495)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.dom4j.DocumentException: http://hibernate.org/dtd/hibernate-mapping-3.0.dtd%20 Nested exception: http://hibernate.org/dtd/hibernate-mapping-3.0.dtd%20
at org.dom4j.io.SAXReader.read(SAXReader.java:484)
at org.hibernate.internal.util.xml.MappingReader.readMappingDocument(MappingReader.java:78)
... 39 more
原始碼：
hibernate.cfg.xml
<?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"> <!-- Generated by MyEclipse Hibernate Tools. --> <hibernate-configuration> <session-factory> <property name="dialect"> org.hibernate.dialect.MySQLDialect </property> <property name="connection.url"> jdbc:mysql://localhost:3306/test </property> <property name="connection.username">root</property> <property name="connection.password">777</property> <property name="connection.driver_class"> com.mysql.jdbc.Driver </property> <!-- <property name="myeclipse.connection.profile">date1</property> --> <mapping resource="model/User.hbm.xml" /> </session-factory> </hibernate-configuration>
User.hbm.xml
<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd "> <!-- Mapping file autogenerated by MyEclipse Persistence Tools --> <hibernate-mapping> <class name="model.User" table="user" catalog="test"> <id name="id" type="java.lang.Integer"> <column name="id" /> <generator class="native" /> </id> <property name="name" type="java.lang.String"> <column name="name" length="20" /> </property> </class> </hibernate-mapping>
<%@ page language="java" pageEncoding="utf-8" import="factory.*,org.hibernate.*,java.util.*,model.User"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
</head>
<body>
<%
request.setCharacterEncoding("utf-8");//設定請求編碼
String usr=request.getParameter("username");//獲取提交的使用者名稱
String pwd=request.getParameter("password");//獲取提交的密碼
boolean validated=false;
User user=null;
user=(User)session.getAttribute("user");
if(user==null){
String hql="from User u where u.name=?";
Query query=HibernateSessionFactory.getSession().createQuery(hql);
query.setParameter(0,usr);
//query.setParameter(1,pwd);
List users=query.list();
Iterator it=users.iterator();
while(it.hasNext()){
if(users.size()!=0){
user=(User)it.next();
session.setAttribute("user",user);
validated=true;
}
}
}
else{
validated=true;
}
if(validated)
{
%>
<jsp:forward page="main.jsp"/>
<%
}
else
{
%>
{
<jsp:forward page="error.jsp"/>
<%
}
%>
</body>
</html>Caused by: org.dom4j.DocumentException: http://hibernate.org/dtd/hibernate-mapping-3.0.dtd%20 Nested exception: http://hibernate.org/dtd/hibernate-mapping-3.0.dtd%20
上網查了一下加紅這一段的意思是http://hibernate.org/dtd/hibernate-mapping-3.0.dtd%20屁股上多了個%20也就是空格,加上最開始的提示Unable to read XML然後就在hibernate.xml檔案裡瘋狂的找空格發現並沒有一度懷疑是不是見了鬼。因為中間修改過
<mapping resource="model/User.hbm.xml" />的路徑，馬上就會報路徑錯誤說明這個xml檔案是被讀到了的。
最後一個偶然的機會發現User.hbm.xml中有這樣一段話
"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd ">尼瑪原來這個鬼在這裡。系統讀完hibernate.xml之後系統去讀User.hbm.xml了所以會有Unable to read XML這個錯。
最後回顧發現找錯的時候都是帶著自己慣有的思維去找。總是認為是對的很難發現錯誤。這一點以後要多多注意了