专治八阿哥的孟老师

表单提交时，需要将请求参数映射到实体类中的Date类型，代码报错。解决日期转换的问题，需要指定一个日期转换格式。

2018-01-06 15:09:14,361 WARN [org.springframework.web.context.support.XmlWebApplicationContext] - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.

2018-01-06 15:20:13,486 DEBUG [org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver] - Resolving exception from handler [public java.util.List<com.ssm.blog.pojo.Category&g...

org.hibernate.boot.MappingNotFoundException:Mapping (RESOURCE) not found : com/pojo/Dept.hbm.xml :origin(com/pojo/Dept.hbm.xml)执行Hibernate的时候，报错说Mapping文件找不到。检查后发现路径没有错，使用idea+maven创建的项目。maven默认的只编译加载...

未知实体。出现这种情况可能有如下原因：1.没有写Mapping映射文件。2.映射文件中的class类名路径写错了，不是实体类的全路径3.没有在hibernate.cfg.xml的<session-factory>中加载映射文件，注意<mapping>节点出现的位置在<property>之后<mapping resource="com/pojo/Dept.h...

org.hibernate.MappingException: Repeatedcolumn in mapping for entity: com.pojo.Employee column: dept_id (should bemapped with insert="false" update="false")实体类中写两个属性private Integer deptId;private Dept...

org.hibernate.PropertyNotFoundException:Could not locate getter method for property [com.pojo.Dept#id]或者：org.hibernate.PropertyNotFoundException:Could not locate setter method for property [com.pojo.D...

ERROR: HHH000346: Errorduring managed flush [org.hibernate.TransientObjectException: object references an unsaved transient instance - save thetransient instance beforeQuery flushing: com.pojo.Employe...

Caused by:org.springframework.beans.factory.BeanCreationException: Error creating beanwith name 'master1' defined in class path resource [spring-config.xml]: Error setting property values; nested exce...

06-Jan-2018 15:39:27.905 SEVERE [http-nio-8080-exec-3] org.apache.catalina.core.ApplicationContext.log StandardWrapper.Throwable org.springframework.beans.factory.UnsatisfiedDependencyException: E

The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers.意思是请求不被接受。出现这种情况一般都是用了@ResponseBody注解，而s

'sqlSessionFactory' defined in class path resource [spring-config.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resour

Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'blogServiceImpl': Uns

Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failureThe last packet sent successfully to the server was 0 milliseconds ago. The driver has not received a

### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorExcep

### Error querying database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'ID' in where clause is ambiguous### The error may exist in file [E:\1715\ssm-

06-Jan-2018 09:43:27.634 SEVERE [http-nio-8080-exec-6] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [springMVC] in context with path [] threw exception [Request p

mybatis中报错：6-Jan-2018 12:08:04.280 SEVERE [http-nio-8080-exec-7] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [springMVC] in context with path [] threw exceptio

1. 如果tomcat启动正常的话，就检查springMVC的配置，如果tomcat启动 都报错，就找原因去吧。2. 地址不正确或没有响应1) 检查Controller类上是否有@Controller注解。@RequestMapping加了没有，是不是在类上面加了父路径了？2) 检查SpringMVC的配置文件是否扫描了Controller所在的包

08-Jan-2018 18:09:35.325 严重 [RMI TCP Connection(4)-127.0.0.1] org.apache.tomcat.util.modeler.BaseModelMBean.invoke Exception invoking method manageApp java.lang.IllegalStateException: ContainerBase.ad...