异常处理基于注解ExceptionHandler
siye@r480:~/svlution/workspace/springmvc4322$ tree src/
src/
├── main
│ ├── java
│ │ ├── log4j.properties
│ │ └── ocn
│ │ └── site
│ │ └── springmvc
│ │ ├── controller
│ │ │ └── Manicontroller.java
│ │ ├── setup
│ │ │ ├── Appconfig.java
│ │ │ └── Webxmlconfig.java
│ │ └── utils
│ │ └── ConstraintsUtils.java
│ ├── resources
│ └── webapp
│ ├── index.jsp
│ └── WEB-INF
│ ├── error.jsp
│ └── web.xml
└── test
├── java
│ └── ocn
│ └── site
│ └── springmvc
│ └── controller
│ └── Runtest.java
└── resources
└── config
└── application.xml
19 directories, 10 files
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>4.3.22.RELEASEversion>
dependency>
<dependency>
<groupId>log4jgroupId>
<artifactId>log4jartifactId>
<version>1.2.17version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
<scope>testscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>4.3.22.RELEASEversion>
<scope>testscope>
dependency>
package ocn.site.springmvc.controller;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.servlet.ModelAndView;
///springmvc4322/src/main/java/ocn/site/springmvc/controller/Manicontroller.java
@Controller
public class Manicontroller {
private final Logger logger = Logger.getLogger(this.getClass());
// reference annotation @ControllerAdvice
@ExceptionHandler(NullPointerException.class)
public ModelAndView handleException(Exception ex) {
logger.info(ex);
ModelAndView mav = new ModelAndView("error");
mav.addObject("message", ex);
return mav;
}
@GetMapping("/test")
public void handler() {
throw new NullPointerException("test annotation @ExceptionHandler");
}
}
package ocn.site.springmvc.setup;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import ocn.site.springmvc.utils.ConstraintsUtils;
///springmvc4322/src/main/java/ocn/site/springmvc/setup/Appconfig.java
@Configuration
@EnableWebMvc
@ComponentScan({ "ocn.site.springmvc.controller", "ocn.site.springmvc.domain" })
public class Appconfig extends WebMvcConfigurerAdapter {
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
// TODO Auto-generated method stub
// super.configureDefaultServletHandling(configurer);
configurer.enable();
}
@Bean
public ViewResolver getViewResolver() {
return new InternalResourceViewResolver(ConstraintsUtils.PREFIX, ConstraintsUtils.SUFFIX);
}
}
package ocn.site.springmvc.setup;
import javax.servlet.Filter;
import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.filter.HiddenHttpMethodFilter;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
import ocn.site.springmvc.utils.ConstraintsUtils;
// /springmvc4322/src/main/java/ocn/site/springmvc/setup/Webxmlconfig.java
public class Webxmlconfig extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
// TODO Auto-generated method stub
return null;
}
@Override
protected Class<?>[] getServletConfigClasses() {
// TODO Auto-generated method stub
return new Class<?>[] { Appconfig.class };
}
@Override
protected String[] getServletMappings() {
// TODO Auto-generated method stub
return new String[] { "/" };
}
@Override
protected Filter[] getServletFilters() {
// TODO Auto-generated method stub
return new Filter[] { new CharacterEncodingFilter(ConstraintsUtils.ENCODING, true),
new HiddenHttpMethodFilter() };
}
}
package ocn.site.springmvc.utils;
// /springmvc4322/src/main/java/ocn/site/springmvc/utils/ConstraintsUtils.java
public interface ConstraintsUtils {
String ENCODING = "UTF-8";
String PREFIX = "/WEB-INF/";
String SUFFIX = ".jsp";
}
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://www.springframework.org/tags" prefix="spring"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
Insert title here
${message }
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<display-name>springmvc4322display-name>
<welcome-file-list>
<welcome-file>index.htmlwelcome-file>
<welcome-file>index.htmwelcome-file>
<welcome-file>index.jspwelcome-file>
<welcome-file>default.htmlwelcome-file>
<welcome-file>default.htmwelcome-file>
<welcome-file>default.jspwelcome-file>
welcome-file-list>
<jsp-config>
<jsp-property-group>
<url-pattern>*.jspurl-pattern>
<el-ignored>falseel-ignored>
<scripting-invalid>truescripting-invalid>
jsp-property-group>
jsp-config>
web-app>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://www.springframework.org/tags" prefix="spring"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
Insert title here
test
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="ocn.site.springmvc.controller">context:component-scan>
<mvc:annotation-driven>mvc:annotation-driven>
<mvc:default-servlet-handler />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/">property>
<property name="suffix" value=".jsp">property>
bean>
beans>
package ocn.site.springmvc.controller;
import org.apache.log4j.Logger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.ResultActions;
import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;
// /springmvc4322/src/test/java/ocn/site/springmvc/controller/Runtest.java
@RunWith(SpringRunner.class)
@WebAppConfiguration
@ContextConfiguration("classpath:config/application.xml")
public class Runtest {
private final Logger logger = Logger.getLogger(this.getClass());
private @Autowired WebApplicationContext wac;
@Test
public void run() throws Exception {
MockMvc build = MockMvcBuilders.webAppContextSetup(this.wac).build();
MockHttpServletRequestBuilder requestBuilder = MockMvcRequestBuilders.get("/test");
ResultActions ra = build.perform(requestBuilder);
ra.andExpect(MockMvcResultMatchers.view().name("error"));
ra.andExpect(MockMvcResultMatchers.status().isOk());
logger.info("test finished");
}
}
19-09-03 15:23:40 org.springframework.test.context.web.WebTestContextBootstrapper =====>>> Loaded default TestExecutionListener class names from location [META-INF/spring.factories]: [org.springframework.test.context.web.ServletTestExecutionListener, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener, org.springframework.test.context.support.DependencyInjectionTestExecutionListener, org.springframework.test.context.support.DirtiesContextTestExecutionListener, org.springframework.test.context.transaction.TransactionalTestExecutionListener, org.springframework.test.context.jdbc.SqlScriptsTestExecutionListener]
19-09-03 15:23:40 org.springframework.test.context.web.WebTestContextBootstrapper =====>>> Using TestExecutionListeners: [org.springframework.test.context.web.ServletTestExecutionListener@1efbd816, org.springframework.test.context.support.DirtiesContextBeforeModesTestExecutionListener@6a2bcfcb, org.springframework.test.context.support.DependencyInjectionTestExecutionListener@4de8b406, org.springframework.test.context.support.DirtiesContextTestExecutionListener@3c756e4d]
19-09-03 15:23:40 org.springframework.beans.factory.xml.XmlBeanDefinitionReader =====>>> Loading XML bean definitions from class path resource [config/application.xml]
19-09-03 15:23:40 org.springframework.web.context.support.GenericWebApplicationContext =====>>> Refreshing org.springframework.web.context.support.GenericWebApplicationContext@343f4d3d: startup date [Tue Sep 03 15:23:40 CST 2019]; root of context hierarchy
19-09-03 15:23:41 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping =====>>> Mapped "{[/test],methods=[GET]}" onto public void ocn.site.springmvc.controller.Manicontroller.handler()
19-09-03 15:23:41 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter =====>>> Looking for @ControllerAdvice: org.springframework.web.context.support.GenericWebApplicationContext@343f4d3d: startup date [Tue Sep 03 15:23:40 CST 2019]; root of context hierarchy
19-09-03 15:23:41 org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter =====>>> Looking for @ControllerAdvice: org.springframework.web.context.support.GenericWebApplicationContext@343f4d3d: startup date [Tue Sep 03 15:23:40 CST 2019]; root of context hierarchy
19-09-03 15:23:41 org.springframework.web.servlet.handler.SimpleUrlHandlerMapping =====>>> Mapped URL path [/**] onto handler 'org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler#0'
19-09-03 15:23:41 org.springframework.mock.web.MockServletContext =====>>> Initializing Spring FrameworkServlet ''
19-09-03 15:23:41 org.springframework.test.web.servlet.TestDispatcherServlet =====>>> FrameworkServlet '': initialization started
19-09-03 15:23:41 org.springframework.test.web.servlet.TestDispatcherServlet =====>>> FrameworkServlet '': initialization completed in 22 ms
19-09-03 15:23:41 ocn.site.springmvc.controller.Manicontroller =====>>> java.lang.NullPointerException: test annotation @ExceptionHandler
19-09-03 15:23:41 ocn.site.springmvc.controller.Runtest =====>>> test finished
19-09-03 15:23:41 org.springframework.web.context.support.GenericWebApplicationContext =====>>> Closing org.springframework.web.context.support.GenericWebApplicationContext@343f4d3d: startup date [Tue Sep 03 15:23:40 CST 2019]; root of context hierarchy
// reference==> /org/springframework/web/servlet/DispatcherServlet.properties
// reference==> org.springframework.web.servlet.DispatcherServlet
// read annotation @EnableWebMvc doc
// reference==> org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.handlerExceptionResolver()