How to handle user defined exceptions (Custom Exception ex.: "BusinessException") in Spring MVC 3 with custom message and view name ?
For Example :
If i throw my own exception from Service layer it should be caught and should redirect to specified view with message, the view name may be same or different.
and i want to display message using properties file I searched in Google, but no luck.
Thanks.
Have a look at the SimpleMappingExceptionResolver
<bean
class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<property name="exceptionMappings">
<props>
<prop key="com.example.exception.BusinessException">
YourView
</prop>
<prop key="java.lang.Exception">error</prop>
</props>
</property>
</bean>
Finally i found the answer of my question in detailed which i used in my application. In this post i have explained to handle exception in spring appllication at three level's
1.Error with specific code like 404
2.Error in Application
3.Any Exception in Ajax call
in web.xml
<error-page>
<error-code>404</error-code>
<location>/error</location>
</error-page>
specify one controller
@Controller
public class ErrorController {
@RequestMapping(value="/error")
public String handlePageNotFoundException(Exception ex,
HttpServletResponse response) {
return "error";
}
}
error.jsp at the location specified in View Resolver
<span >
An error has occured, please contact the support team.
</span>
Custome Exception Handler
@Component
public class ExceptionHandler extends ExceptionHandlerExceptionResolver{
@Autowired
ApplicationContext context;
@Override
public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object o, Exception ex) {
TestException exception=null;
if (ex instanceof DataAccessException) {
exception = new TestException(context.getMessage("SQLException",
null, null));
} else if (ex instanceof SQLException) {
exception = new TestException(context.getMessage("SQLException",
null, null));
} else if (ex instanceof java.net.UnknownHostException) {
exception = new TestException(context.getMessage(
"UnknownHostException", null, null));
} else if (ex instanceof IOException) {
exception = new TestException(context.getMessage("IOException",
null,null));
} else if (ex instanceof Exception) {
exception = new TestException(context.getMessage("Exception",
null, null));
} else if (ex instanceof Throwable) {
exception = new TestException(context.getMessage("Throwable",
null, null));
}
if( isAjax(request) ) {
return exception.asModelAndView();
}
else
{ ModelAndView modelAndView = new ModelAndView("TestExceptionPage");
modelAndView.addObject("exception", exception);
return modelAndView;
}
}
private boolean isAjax(HttpServletRequest request) {
return "XMLHttpRequest".equals(request.getHeader("X-Requested-With"));
}
}
Exception Pojo
public class TestException extends RuntimeException {
private String message;
public TestException(){}
public TestException(String message) {
this.message = message;
}
public String getMessage(){
return this.message;
}
public void setMessage(String message) {
this.message = message;
}
public ModelAndView asModelAndView() {
MappingJacksonJsonView jsonView = new MappingJacksonJsonView();
return new ModelAndView(jsonView, ImmutableMap.of("error", message));
}
Exception jsp
<h3><span>${exception.message}</span></h3>
Common.js
function isError(data){
if(typeof data.error == 'undefined')
{
return true;
}
return false;
}
Sample Ajax call in jsp
function customerNameAvail() {
$.ajax({
url: 'userNameAvail',
data: ({email : $('#email').val()}),
success: function(data) {
if(isError(data))
{
if(data=="email already registered"){
alert('customer Name already exist');
}
else{
alert('customer Name Available');
}
}
else
{
alert(data.error);
}
}
});
}
Hope this will help for those who are looking for Exception Handling in spring 3.2.
Thanks
You can register a @Component to catch all exceptions by creating a bean with the default DispatcherServlet HANDLER_EXCEPTION_RESOLVER_BEAN_NAME and then add specific objects to a ModelAndView.
You can inject properties using @Value (Spring 3.0+) - see Spring properties (property-placeholder) autowiring for one example.
import org.springframework.web.servlet.*;
import org.springframework.validation.*;
import javax.servlet.http.*;
@Component(DispatcherServlet.HANDLER_EXCEPTION_RESOLVER_BEAN_NAME)
public class MyHandlerExceptionResolver implements HandlerExceptionResolver {
@Value("${property.name}") private String injectedProperty;
@Override
public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
ModelAndView mav = new ModelAndView("viewname");
if (ex instanceof BusinessException) {
mav.addObject("injectedProperty", injectedProperty);
} else (ex instanceof BindException) {
BindException bindEx = (BindException) ex;
BindingResult result= bindEx.getBindingResult();
// add errors from validation to mav
}
return mav;
}
}
