1.
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.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
5.
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
6
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
7.
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>
8.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！
注：上面摘取自http://blog.sina.com.cn/s/reader_53edf7c101009gy3.html
下面是自己遇见的其他问题
9. SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/impl/StaticLoggerBinder
方案：加slf4j-nop-1.5.8 ，没有可去http://www.slf4j.org下载
10.Write operations are not allowed in read-only mode (FlushMode.NEVER)
方案：见http://www.yybean.com/opensessioninviewfilter-role-and-configuration
11.org.springframework.orm.hibernate3.HibernateQueryException: User is not mapped [from User ep where ep.empeeAcct = ?
如果hibernate注解的话，检查下配置
<property name="packagesToScan" value="com.yybean.domain.*"/>
如果所有类是直接放在com.yybean.domain下的话，配置必须为<property name="packagesToScan" value="com.yybean.domain"/>
com.yybean.domain.*只会扫描此包下的所有子包里的类
第二种情况就是看看实体类的注解是否写错，注意@Entity 是引入
import javax.persistence.Entity;
而不是
import org.hibernate.annotations.Entity 哦
如果hibernate是配置的话，检查下配置有没包含映射User实体类的xml
