关于HibernateException:Unable to read xml 以及Error applying BeanValidation relation

kevin-go 2013-12-31 02:21:22
我们在使用MyEclipse 从DB Broswer 逆向生成Hibernate工程时,会出现Hibernate Exception,这其中有两个很常见其中一个是:Unable to Read XML,另一个是Error applying BeanValidation relational constraints.我们先说第一个吧:
Unable to Read XML这一个是因为无法读取.hbm.xml配置文件,也有说话是无法读取cfg.xml
不过在我的测试中这两者都有,其中原因主要有两个:
原因1:通过myeclipse逆向生成的POJO.hbm.xml的DTD头申明中有特殊符号(空格),这一点,网上有说法是工具生成的标签前后后特殊符号,建议删除.其实主要还是在
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://www.hibernate.net/dtd/hibernate-mapping-3.0.dtd ">
这一句的最后
-3.0.dtd "
,dtd和"有个空格导致的dom4j解析错误.解决了这个问题后,还是出现Unable to Read XML,其实还是因为无法解析这份POJO.hbm.xml,这是因为DTD的引用地址有误,从网上找的答案来看,可以试着将上面的地址中的.net改为.org试下,应该就能成功.
如果出现Could not parse configuration: /hibernate.cfg.xml那应该就是cfg.xml有误,我在调试的时候引用
"http://hibernate.sourceforge.org/hibernate-configuration-3.0.dtd">
时候出现这个异常,但是改为
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
后正常


关于第二个异常Exception in thread "main" org.hibernate.HibernateException: Error applying BeanValidation relational constraints,解决方案请见sivyer123的日志:
http://blog.csdn.net/sivyer123/article/details/9185325

以下Unable to Read XML 异常控制台错误调试记录:
2013-12-31 13:23:47 org.hibernate.annotations.common.Version <clinit>

INFO: HCANN000001: Hibernate Commons Annotations {4.0.1.Final}

2013-12-31 13:23:47 org.hibernate.Version logVersion

INFO: HHH000412: Hibernate Core {4.1.4.Final}

2013-12-31 13:23:47 org.hibernate.cfg.Environment <clinit>

INFO: HHH000206: hibernate.properties not found

2013-12-31 13:23:47 org.hibernate.cfg.Environment buildBytecodeProvider

INFO: HHH000021: Bytecode provider name : javassist

2013-12-31 13:23:47 org.hibernate.cfg.Configuration configure

INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml

2013-12-31 13:23:47 org.hibernate.cfg.Configuration getConfigurationInputStream

INFO: HHH000040: Configuration resource: /hibernate.cfg.xml

2013-12-31 13:23:47 org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity

WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!

2013-12-31 13:23:47 org.hibernate.cfg.Configuration addResource

INFO: HHH000221: Reading mappings from resource: ./com/brady/model/Message.hbm.xml

Exception in thread "main" 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 com.brady.test.HqlTest.main(HqlTest.java:15)

Caused by: org.dom4j.DocumentException: http://www.hibernate.net/dtd/hibernate-mapping-3.0.dtd%20 Nested exception: http://www.hibernate.net/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)

	... 11 more

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Damon丶 2016-09-07
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会给气死，还好看到楼主的分享，谢谢。
Defonds 2013-12-31
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多谢楼主分享解决方案
HIbernate4.3.6整合c3p0所需jar
开始报错如下，需更换c3p0包 org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.connections.spi.ConnectionProvider] at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:261) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:225) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206) at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.buildJdbcConnectionAccess(JdbcServicesImpl.java:260) at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:94) at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111) at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234) at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206) at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1885) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1843) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1928) at test.UserTest01.save(UserTest01.java:20) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222) at org.junit.runners.ParentRunner.run(ParentRunner.java:300) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) Caused by: org.hibernate.HibernateException: Could not instantiate connection provider [org.hibernate.connection.C3P0ConnectionProvider] at org.hibernate.engine.jdbc.connections.internal.ConnectionProviderInitiator.instantiateExplicitConnectionProvider(ConnectionProviderInitiator.java:197) at org.hibernate.engine.jdbc.connections.internal.ConnectionProviderInitiator.initiateService(ConnectionProviderInitiator.java:120) at org.hibernate.engine.jdbc.connections.internal.ConnectionProviderInitiator.initiateService(ConnectionProviderInitiator.java:55) at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:105) at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:251) ... 34 more Caused by: org.hibernate.boot.registry.selector.spi.StrategySelectionException: Unable to resolve name [org.hibernate.connection.C3P0ConnectionProvider] as strategy [org.hibernate.engine.jdbc.connections.spi.ConnectionProvider] at org.hibernate.boot.registry.selector.internal.StrategySelectorImpl.selectStrategyImplementor(StrategySelectorImpl.java:128) at org.hibernate.engine.jdbc.connections.internal.ConnectionProviderInitiator.instantiateExplicitConnectionProvider(ConnectionProviderInitiator.java:194) ... 38 more
spring_MVC源码
弃用了struts，用spring mvc框架做了几个项目，感觉都不错，而且使用了注解方式，可以省掉一大堆配置文件。本文主要介绍使用注解方式配置的spring mvc，之前写的spring3.0 mvc和rest小例子没有介绍到数据层的内容，现在这一篇补上。下面开始贴代码。 文中用的框架版本：spring 3,hibernate 3,没有的，自己上网下。 先说web.xml配置： [java] view plaincopy 01.<?xml version="1.0" encoding="UTF-8"?> 02.xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> 03. s3h3 04. 05. contextConfigLocation 06. classpath:applicationContext*.xml 07. 08. 09. org.springframework.web.context.ContextLoaderListener 10. 11. 12. 13. spring 14. org.springframework.web.servlet.DispatcherServlet 15. 1 16. 17. ing> 18. spring <!-- 这里在配成spring,下边也要写一个名为spring-servlet.xml的文件，主要用来配置它的controller --> 19. *.do 20. ing> 21. 22. index.jsp 23. 24. spring-servlet,主要配置controller的信息 [java] view plaincopy 01.<?xml version="1.0" encoding="UTF-8"?> 02. <beans 03. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" 04. xmlns:context="http://www.springframework.org/schema/context" 05. xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 06. http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd 07. http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd 08. http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 09. 10. 11. <!-- 把标记了@Controller注解的类转换为bean --> 12. 13. <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 --> 14. <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /> 15. 16. <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 --> 17. <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" 18. p:prefix="/WEB-INF/view/" p:suffix=".jsp" /> 19. 20. <bean id="multipartResolver" 21. class="org.springframework.web.multipart.commons.CommonsMultipartResolver" 22. p:defaultEncoding="utf-8" /> 23. beans> applicationContext.xml代码 [java] view plaincopy 01.<?xml version="1.0" encoding="UTF-8"?> 02.<beans 03. xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" 04. xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" 05. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 06. xsi:schemaLocation=" 07. http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 08. http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd 09. http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd 10. http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"> 11. 12. 13. <!-- 自动扫描所有注解该路径 --> 14. 15. 16. 17. <bean id="sessionFactory" 18. class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> 19. 20. 21. 22. ${dataSource.dialect} 23. ${dataSource.hbm2ddl.auto} 24. update 25. 26. 27. 28. 29. com.mvc.entity<!-- 扫描实体类，也就是平时所说的model --> 30. 31. 32. bean> 33. 34. <bean id="transactionManager" 35. class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 36. 37. 38. bean> 39. 40. <bean id="dataSource" 41. class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 42. 43. 44. 45. 46. bean> 47. <!-- Dao的实现 --> 48. <bean id="entityDao" class="com.mvc.dao.EntityDaoImpl"> 49. 50. bean> 51. 52. 53. 54. 55.beans> hibernate.properties数据库连接配置 [java] view plaincopy 01.dataSource.password=123 02.dataSource.username=root 03.dataSource.databaseName=test 04.dataSource.driverClassName=com.mysql.jdbc.Driver 05.dataSource.dialect=org.hibernate.dialect.MySQL5Dialect 06.dataSource.serverName=localhost:3306 07.dataSource.url=jdbc:mysql://localhost:3306/test 08.dataSource.properties=user=${dataSource.username};databaseName=${dataSource.databaseName};serverName=${dataSource.serverName};password=${dataSource.password} 09.dataSource.hbm2ddl.auto=update 配置已经完成，下面开始例子 先在数据库建表，例子用的是mysql数据库 [java] view plaincopy 01.CREATE TABLE `test`.`student` ( 02. `id` int(10) unsigned NOT NULL AUTO_INCREMENT, 03. `name` varchar(45) NOT NULL, 04. `psw` varchar(45) NOT NULL, 05. PRIMARY KEY (`id`) 06.) 建好表后，生成实体类 [java] view plaincopy 01.package com.mvc.entity; 02. 03.import java.io.Serializable; 04. 05.import javax.persistence.Basic; 06.import javax.persistence.Column; 07.import javax.persistence.Entity; 08.import javax.persistence.GeneratedValue; 09.import javax.persistence.GenerationType; 10.import javax.persistence.Id; 11.import javax.persistence.Table; 12. 13.@Entity 14.@Table(name = "student") 15.public class Student implements Serializable { 16. private static final long serialVersionUID = 1L; 17. @Id 18. @Basic(optional = false) 19. @GeneratedValue(strategy = GenerationType.IDENTITY) 20. @Column(name = "id", nullable = false) 21. private Integer id; 22. @Column(name = "name") 23. private String user; 24. @Column(name = "psw") 25. private String psw; 26. public Integer getId() { 27. return id; 28. } 29. public void setId(Integer id) { 30. this.id = id; 31. } 32. 33. public String getUser() { 34. return user; 35. } 36. public void setUser(String user) { 37. this.user = user; 38. } 39. public String getPsw() { 40. return psw; 41. } 42. public void setPsw(String psw) { 43. this.psw = psw; 44. } 45.} Dao层实现 [java] view plaincopy 01.package com.mvc.dao; 02. 03.import java.util.List; 04. 05.public interface EntityDao { 06. public List<Object> createQuery(final String queryString); 07. public Object save(final Object model); 08. public void update(final Object model); 09. public void delete(final Object model); 10.} [java] view plaincopy 01.package com.mvc.dao; 02. 03.import java.util.List; 04. 05.import org.hibernate.Query; 06.import org.springframework.orm.hibernate3.HibernateCallback; 07.import org.springframework.orm.hibernate3.support.HibernateDaoSupport; 08. 09.public class EntityDaoImpl extends HibernateDaoSupport implements EntityDao{ 10. public List<Object> createQuery(final String queryString) { 11. return (List<Object>) getHibernateTemplate().execute( 12. new HibernateCallback<Object>() { 13. public Object doInHibernate(org.hibernate.Session session) 14. throws org.hibernate.HibernateException { 15. Query query = session.createQuery(queryString); 16. List<Object> rows = query.list(); 17. return rows; 18. } 19. }); 20. } 21. public Object save(final Object model) { 22. return getHibernateTemplate().execute( 23. new HibernateCallback<Object>() { 24. public Object doInHibernate(org.hibernate.Session session) 25. throws org.hibernate.HibernateException { 26. session.save(model); 27. return null; 28. } 29. }); 30. } 31. public void update(final Object model) { 32. getHibernateTemplate().execute(new HibernateCallback<Object>() { 33. public Object doInHibernate(org.hibernate.Session session) 34. throws org.hibernate.HibernateException { 35. session.update(model); 36. return null; 37. } 38. }); 39. } 40. public void delete(final Object model) { 41. getHibernateTemplate().execute(new HibernateCallback<Object>() { 42. public Object doInHibernate(org.hibernate.Session session) 43. throws org.hibernate.HibernateException { 44. session.delete(model); 45. return null; 46. } 47. }); 48. } 49.} Dao在applicationContext.xml注入 <bean id="entityDao" class="com.mvc.dao.EntityDaoImpl"> bean> Dao只有一个类的实现，直接供其它service层调用，如果你想更换为其它的Dao实现，也只需修改这里的配置就行了。 开始写view页面，WEB-INF/view下新建页面student.jsp，WEB-INF/view这路径是在spring-servlet.xml文件配置的，你可以配置成其它，也可以多个路径。student.jsp代码 [xhtml] view plaincopy 01.<%@ page language="java" contentType="text/html; charset=UTF-8" 02. pageEncoding="UTF-8"%> 03.<%@ include file="/include/head.jsp"%> 04. 05.<html> 06.<head> 07.<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 08.<title>添加</title> 09. 11.// --><!-- 13.table{ border-collapse:collapse; } 14.td{ border:1px solid #f00; } 15.--><style mce_bogus="1">table{ border-collapse:collapse; } 16.td{ border:1px solid #f00; }</style> 17.<!-- 18.function add(){ 19. [removed].href="<%=request.getContextPath() %>/student.do?method=add"; 20.} 21. 22.function del(id){ 23.$.ajax( { 24. type : "POST", 25. url : "<%=request.getContextPath()%>/student.do?method=del&id;=" + id, 26. dataType: "json", 27. success : function(data) { 28. if(data.del == "true"){ 29. alert("删除成功！"); 30. $("#" + id).remove(); 31. } 32. else{ 33. alert("删除失败！"); 34. } 35. }, 36. error :function(){ 37. alert("网络连接出错！"); 38. } 39.}); 40.} 41.// --> 47. 48. 序号 49. 姓名 50. 密码 51. 操作 52. 53. 54. "> 55. 56. 57. 58. 59. <input type="button" value="编辑"/> 60. <input type="button" value="${student.id}"/>')" value="删除"/> 61. 62. 63. 64. 65. 66.</body> 67.</html> student_add.jsp [xhtml] view plaincopy 01.<%@ page language="java" contentType="text/html; charset=UTF-8" 02. pageEncoding="UTF-8"%> 03.<%@ include file="/include/head.jsp"%> 04. 05.<html> 06.<head> 07.<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 08.<title>学生添加</title> 09.<!-- 10.function turnback(){ 11. [removed].href="<%=request.getContextPath() %>/student.do"; 12.} 13.// --> 17.
18. 19. 20. 21. 22.
姓名<input id="user" name="user" type="text" /></td>
密码<input id="psw" name="psw" type="text" /></td>
<input type="submit" value="提交"/><input type="button" value="返回" />
23. 24.</form> 25.</body> 26.</html> controller类实现，只需把注解写上，spring就会自动帮你找到相应的bean，相应的注解标记意义，不明白的，可以自己查下@Service，@Controller，@Entity等等的内容。 [java] view plaincopy 01.package com.mvc.controller; 02. 03.import java.util.List; 04. 05.import javax.servlet.http.HttpServletRequest; 06.import javax.servlet.http.HttpServletResponse; 07. 08.import org.apache.commons.logging.Log; 09.import org.apache.commons.logging.LogFactory; 10.import org.springframework.beans.factory.annotation.Autowired; 11.import org.springframework.stereotype.Controller; 12.import org.springframework.ui.ModelMap; 13.import org.springframework.web.bind.annotation.RequestMapping; 14.import org.springframework.web.bind.annotation.RequestMethod; 15.import org.springframework.web.bind.annotation.RequestParam; 16.import org.springframework.web.servlet.ModelAndView; 17. 18.import com.mvc.entity.Student; 19.import com.mvc.service.StudentService; 20. 21.@Controller 22.@RequestMapping("/student.do") 23.public class StudentController { 24. protected final transient Log log = LogFactory 25. .getLog(StudentController.class); 26. @Autowired 27. private StudentService studentService; 28. public StudentController(){ 29. 30. } 31. 32. @RequestMapping 33. public String load(ModelMap modelMap){ 34. List<Object> list = studentService.getStudentList(); 35. modelMap.put("list", list); 36. return "student"; 37. } 38. 39. @RequestMapping(params = "method=add") 40. public String add(HttpServletRequest request, ModelMap modelMap) throws Exception{ 41. return "student_add"; 42. } 43. 44. @RequestMapping(params = "method=save") 45. public String save(HttpServletRequest request, ModelMap modelMap){ 46. String user = request.getParameter("user"); 47. String psw = request.getParameter("psw"); 48. Student st = new Student(); 49. st.setUser(user); 50. st.setPsw(psw); 51. try{ 52. studentService.save(st); 53. modelMap.put("addstate", "添加成功"); 54. } 55. catch(Exception e){ 56. log.error(e.getMessage()); 57. modelMap.put("addstate", "添加失败"); 58. } 59. 60. return "student_add"; 61. } 62. 63. @RequestMapping(params = "method=del") 64. public void del(@RequestParam("id") String id, HttpServletResponse response){ 65. try{ 66. Student st = new Student(); 67. st.setId(Integer.valueOf(id)); 68. studentService.delete(st); 69. response.getWriter().print("{/"del/":/"true/"}"); 70. } 71. catch(Exception e){ 72. log.error(e.getMessage()); 73. e.printStackTrace(); 74. } 75. } 76.} service类实现 [java] view plaincopy 01.package com.mvc.service; 02. 03.import java.util.List; 04. 05.import org.springframework.beans.factory.annotation.Autowired; 06.import org.springframework.stereotype.Service; 07.import org.springframework.transaction.annotation.Transactional; 08. 09.import com.mvc.dao.EntityDao; 10.import com.mvc.entity.Student; 11. 12.@Service 13.public class StudentService { 14. @Autowired 15. private EntityDao entityDao; 16. 17. @Transactional 18. public List<Object> getStudentList(){ 19. StringBuffer sff = new StringBuffer(); 20. sff.append("select a from ").append(Student.class.getSimpleName()).append(" a "); 21. List<Object> list = entityDao.createQuery(sff.toString()); 22. return list; 23. } 24. 25. public void save(Student st){ 26. entityDao.save(st); 27. } 28. public void delete(Object obj){ 29. entityDao.delete(obj); 30. } 31.} OK，例子写完。有其它业务内容，只需直接新建view，并实现相应comtroller和service就行了，配置和dao层的内容基本不变，也就是每次只需写jsp（view），controller和service调用dao就行了。 怎样，看了这个，spring mvc是不是比ssh实现更方便灵活。
org.hibernate.HibernateException: Error applying BeanValidation relational constraints
1、错误描述%%%% Error Creating SessionFactory %%%% org.hibernate.HibernateException: Error applying BeanValidation relational constraints at org.hibernate.cfg.beanvalidation.BeanValidationIntegrator.apply
异常解决—org.hibernate.HibernateException: Unable to get the default Bean Validation factory
org.hibernate.HibernateException: Unable to get the default Bean Validation factory at org.hibernate.cfg.beanvalidation.BeanValidationActivator.applyDDL(BeanValidationActivator.java:127) at org.hibe
HibernateException：Unable to get the default Bean Validation factory
今天用Hibernate出现了一个异常：org.hibernate.HibernateException: Unable to get the default Bean Validation factory 以前用的时候怎么没发现过呢？在网上找到了答案！ 我就是映射一下看看: @Test public void testSchemaExport() { new SchemaExpo
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