Spring MVC - SimpleMappingExceptionResolver Examples

package com.logicbig.example;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.config.annotation.ViewResolverRegistry;
import org.springframework.web.servlet.handler.SimpleMappingExceptionResolver;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import java.util.List;
import java.util.Properties;

@EnableWebMvc
@ComponentScan
@Configuration
public class AppConfig implements WebMvcConfigurer {

    @Override
    public void configureHandlerExceptionResolvers(
            List<HandlerExceptionResolver> exceptionResolvers) {
        SimpleMappingExceptionResolver s =
                new SimpleMappingExceptionResolver();

        //exception to view name mapping
        Properties p = new Properties();
        p.setProperty(NullPointerException.class.getName(), "npeView");
        p.setProperty(OrderIdNotValidException.class.getName(),
                      "OrderIdNotValidView");
        s.setExceptionMappings(p);

        //mapping status code with view response.
        s.addStatusCode("npeView", 404);

        //setting default error view
        s.setDefaultErrorView("defaultErrorView");
        //setting default status code
        s.setDefaultStatusCode(400);

        exceptionResolvers.add(s);
    }

    @Override
    public void configureViewResolvers(ViewResolverRegistry registry) {
    registry.jsp("/WEB-INF/views/", ".jsp");
    }
}

package com.logicbig.example;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class ExampleController {

    @Autowired
    private DataService dataService;

    @ResponseBody
    @RequestMapping("/order/{orderId}")
    public String handleRequest (@PathVariable("orderId") String orderId,
                                 Model model) {
        return dataService.getOrderDetail(orderId);
    }

    @ResponseBody
    @RequestMapping("/data/{id}")
    public String testHandler (@PathVariable("id") String id,
                               Model model) {
        return dataService.getData(id);
    }

    @ResponseBody
    @RequestMapping("/test")
    public void testHandler2 () {
        throw new RuntimeException("test exception");
    }
}

    @Bean
    HandlerExceptionResolver customExceptionResolver () {
        SimpleMappingExceptionResolver s = new SimpleMappingExceptionResolver();
        Properties p = new Properties();
        //mapping spring internal error NoHandlerFoundException to a view name.
        p.setProperty(NoHandlerFoundException.class.getName(), "error-page");
        s.setExceptionMappings(p);
        //uncomment following line if we want to send code other than default 200
        //s.addStatusCode("error-page", HttpStatus.NOT_FOUND.value());

        //This resolver will be processed before default ones
        s.setOrder(Ordered.HIGHEST_PRECEDENCE);
        return s;
    }