2017.3.31 Spring MVC Tutorial (iv) Global exception handling

Source: Internet
Author: User
Tags spring mvc tutorial log4j

Learning Blog: http://elf8848.iteye.com/blog/875830/

Version used in my project: 4.2.0. Blog time earlier, 11, learning is Spring3 MVC. I do not know if there is any change in the version of the larger features.

Spring MVC Tutorial (iv) Global exception handling


1 Simplemappingexceptionresolver's parent class: Abstracthandlerexceptionresolver 2 with Simplemappingexceptionresolver, different exceptions are mapped to different JSP pages (through the configuration of the exceptionmappings property).  3 If the thrown exception does not have a corresponding mapping in exceptionmappings, Spring displays the default exception page. The default exception page is configured through the Defaulterrorview property.  4 can also implement the Handlerexceptionresolver interface itself to handle exceptions.

Note : The exception display interface is configured here to include only the main file name , as the file path and suffix are already specified in viewresolver . As/error/error represents/error/error.js.

1 <!--Total error Handling -  2 <BeanID= "Exceptionresolver"class= "Org.springframework.web.servlet.handler." simplemappingexceptionresolver">  3     < Propertyname= "Defaulterrorview">    4         <value>/error/error</value>  5     </ Property>  6     < Propertyname= "Defaultstatuscode">    7         <value>500</value>  8     </ Property>     9     < Propertyname= "Warnlogcategory">    Ten         <value>Org.springframework.web.servlet.handler.SimpleMappingExceptionResolver</value>   One     </ Property>      A </Bean> 

the wrong JSP file is displayed :

"Exception" is a key, which is specified by default in the Simplemappingexceptionresolver class. This value can be modified through a configuration file.

1 <%@ Pagelanguage= "Java"ContentType= "text/html; CHARSET=GBK"  2 pageencoding= "GBK"%>  3 <%@ PageImport= "Java.lang.Exception"%>  4 <!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd ">  5 <HTML>  6 <Head>  7 <Metahttp-equiv= "Content-type"content= "text/html; CHARSET=GBK">  8 <title>Error page</title>  9 </Head>  Ten <Body>   One <H1>Something went wrong.</H1>   A <%   - Exceptione= (Exception) request.getattribute ("Exception");  - Out.print (E.getmessage ());  the %>   - </Body>   - </HTML>

2. Logging global exceptions to the log

(1) Warnlogcategory property

1 <  name= "warnlogcategory">           
2 <value>org.springframework.web.servlet.handler.SimpleMappingExceptionResolver </ value > 3 </ Property >

(2) log4j configuration file

Join (fully qualified name): Log4j.logger.org.springframework.web.servlet.handler.simplemappingexceptionresolver=warn. This will certainly be included even if the root log level of the log4j is error.

2017.3.31 Spring MVC Tutorial (iv) Global exception handling

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