org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save():
原因：<id>元素配置不正确，<id>元素缺少其子元
素<generator></generator>的配置。解决方法：<id>元素映射了相应数据库表的主键字段，
对其子元素<generator
class="">,其中class的取值可以为increment、identity、sequence、hilo、native......
等，一般取其值为native 。
2.
java.lang.IllegalArgumentException: id to load is required for loading
方案:Users user=(Users)this.getHibernateTemplate().get(Users.class, id);如果以用户名为参数不能用此方法
3.
org.springframework.dao.InvalidDataAccessResourceUsageException: could not execute query; nested exception is org.hibernate.exception.SQLGrammarException: could not execute query
方案：sql语句有错误
4.
严重: Error starting static Resources
java.lang.IllegalArgumentException:
Document base D:/Program Files/Apache Software Foundation/Tomcat
5.0/webapps/tomcat-docs does not exist or is not a readable directory
严重: Error in resourceStart()
2007-6-6 23:32:25 org.apache.catalina.core.StandardContext start
严重: Error getConfigured
2007-6-6 23:32:25 org.apache.catalina.core.StandardContext start
严重: Context startup failed due to previous errors
2007-6-6 23:32:25 org.apache.catalina.core.StandardContext start
严重: Exception during cleanup after start failed
LifecycleException: Container StandardContext[/tomcat-docs] has not been started
5.jsf+spring+hibernate
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name 'dataSource' defined in ServletContext resource
[/WEB-INF/applicationContext.xml]: Instantiation of bean failed; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/pool/impl/GenericObjectPool
严重: Error listenerStart
2007-6-8 10:31:55 org.apache.catalina.core.StandardContext start
严重: Context [/shj01] startup failed due to previous errors
2007-6-8 10:31:55 org.apache.catalina.core.ApplicationContext log
方案：spring-framework-2.0.5/lib/jakarta-commons下的commons-collections.jar commons-dbcp.jar commons-pool.jar加载到工程去
6.
严重: Exception sending context initialized event to listener instance of class com.sun.faces.config.ConfigureListener
javax.faces.FacesException: Can't parse configuration
file:jar:file:/E:/工具/apache-tomcat-6.0.9/apache-tomcat-6.0.9/webapps
/jsf02/WEB-INF/lib/jsf-impl.jar!/com/sun/faces/standard-html-renderkit.xml
方案：把tomcat的安装文件换了位置就没事了
7.spring MVC+hibernate
严重: StandardWrapper.Throwable
org.springframework.beans.factory.BeanCreationException: Error
creating bean with name 'sessionFactory' defined in ServletContext
resource [/WEB-INF/applicationContext.xml]: Invocation of init method
failed; nested exception is java.lang.NoSuchMethodError: org.objectweb.asm.ClassVisitor.visit(IILjava/lang/String;Ljava/lang/String;[Ljava/lang/String;Ljava/lang/String;)V
Caused by: java.lang.NoSuchMethodError: org.objectweb.asm.ClassVisitor.visit(IILjava/lang/String;Ljava/lang/String;[Ljava/lang/String;Ljava/lang/String;)V
方案：
在使用Spring的AOP编程时，会用到这几个lib：
asm-2.2.2.jar
asm-commons-2.2.2.jar
asm-util-2.2.2.jar
Hibernate使用如果lib：
asm.jar
asm-attrs.jar
其中asm-2.2.2.jar与asm.jar存在类上的冲突！！！
使用其中之一或两者都使用，可能会出现如下错误：
java.lang.NoClassDefFoundError: org/objectweb/asm/CodeVisitor
java.lang.NoClassDefFoundError: org/objectweb/asm/commons/EmptyVisitor
java.lang.NoSuchMethodError: org.objectweb.asm.ClassVisitor.visit。。。。。。
解决办法是：
1.去掉类路径上的关于Hibernate的3个lib
asm.jar
asm-attrs.jar
cglib-2.1.3.jar
2.加入Spring中的以下4个lib
asm-2.2.2.jar
asm-commons-2.2.2.jar
asm-util-2.2.2.jar
cglib-nodep-2.1_3.jar
8.spring MVC+hibernate
Exception in thread "main" org.springframework.dao.InvalidDataAccessResourceUsageException: Could not execute JDBC batch update; nested exception is org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update
Caused by: org.hibernate.exception.SQLGrammarException: Could not execute JDBC batch update
9.
org.springframework.beans.factory.CannotLoadBeanClassException:
Error loading class
[org.springframework.transaction.interceptor.TransactionProxyFactoryBean]
for bean with name 'userService' defined in ServletContext resource
[/WEB-INF/applicationContext.xml]: problem with class file or dependent
class; nested exception is java.lang.NoClassDefFoundError: org/springframework/aop/framework/AbstractSingletonProxyFactoryBean
Caused by: java.lang.NoClassDefFoundError: org/springframework/aop/framework/AbstractSingletonProxyFactoryBean
方案：没加 spring 2.0 aop libraries
10.
org.apache.jasper.JasperException: Unable to compile class for JSP:
方案：jsp网页中的java代码有问题
11.
Exception in thread "main"
org.springframework.beans.factory.BeanCreationException: Error creating
bean with name 'CompanyController' defined in class path resource
[com/company/test/company-config.xml]: Error setting property values; nested exception is
org.springframework.beans.NotWritablePropertyException: Invalid
property 'methodNameResolver' of bean class
[com.company.action.CompanyController]: Bean property
'methodNameResolver' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
Caused by: org.springframework.beans.NotWritablePropertyException:
Invalid property 'methodNameResolver' of bean class
[com.company.action.CompanyController]: Bean property
'methodNameResolver' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
控制器没继承MultiActionController
12.
Exception in thread "main"
org.springframework.beans.factory.BeanCreationException: Error creating
bean with name 'turDiffService' defined in class path resource
[com/expert/test/expert-config.xml]: Error setting property values; nested exception is
org.springframework.beans.NotWritablePropertyException: Invalid
property 'turDifficultDao' of bean class
[com.expert.operation.impl.TurDiffSerImpl]: Bean property
'turDifficultDao' is not writable or has an invalid setter method. Did you mean 'truDifficultDao'?
Caused by: org.springframework.beans.NotWritablePropertyException:
Invalid property 'turDifficultDao' of bean class
[com.expert.operation.impl.TurDiffSerImpl]: Bean property
'turDifficultDao' is not writable or has an invalid setter method. Did you mean 'truDifficultDao'?
原因：
在定义时TurDifficultDao turDifficultDao ，把有个字母写错，后发现错误，改过来了，但没把get() set()方法中对应的改过来
13.
Exception in thread "main"
org.springframework.beans.factory.BeanCreationException: Error creating
bean with name 'urlMapping' defined in class path resource
[com/expert/test/expert-config.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named '' is defined
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named '' is defined
原因：
在expert-config.xml中创建
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
<property name="mappings">
<props>
<prop key=""></prop>
</props>
</property>
</bean>
没有给<prop key=""></prop>赋值
14.
org.springframework.orm.hibernate3.HibernateQueryException: Instruction is not mapped
[from Instruction]; nested exception is org.hibernate.hql.ast.QuerySyntaxException:
Instruction is not mapped [from Instruction]
Caused by: org.hibernate.hql.ast.QuerySyntaxException: Instruction is not mapped [from
Instruction]
原因：在data-config.xml中没加入<value>com/serializ/Instruction.hbm.xml</value>
15.
java.sql.SQLException: Field 'userId' doesn't have a default value
原因：把配置文件的主键改为<generator class="assigned" />
可以进行自定义主键值，因为我在设主键时没有设成自动增长的，要求填默认值是受了配置文件里<generator
class="native"/>的影响了。
16.org.apache.jasper.JasperException: Unable to compile class for JSP
原因：jsp页面中的java代码括号不对称！