30. SpringMVC_RESTRUL_CRUD_显示所有员工信息
31. SpringMVC_RESTRUL_CRUD_添加操作&表单标签
32. SpringMVC_RESTRUL_CRUD_删除操作&处理静态资源
33. SpringMVC_RESTRUL_CRUD_修改操作
34. SpringMVC_数据绑定流程分析
35. SpringMVC_自定义类型转换器
36. SpringMVC_annotation-driven配置
37. SpringMVC_InitBinder注解
38. SpringMVC_数据的格式化
39. SpringMVC_JSR303数据校验
40. SpringMVC_错误消息的显示及国际化
41. SpringMVC_返回JSON
42. SpringMVC_HttpMessageConverter原理
43. SpringMVC_使用HttpMessageConverter
44. SpringMVC_国际化_概述
45. SpringMVC_国际化_前两个问题
46. SpringMVC_国际化_通过超链接切换Locale
47. SpringMVC_文件上传
48. SpringMVC_第一个自定义的拦截器
49. SpringMVC_拦截器的配置
50. SpringMVC_多个拦截方法的执行顺序
51. SpringMVC_异常处理_ExceptionHandler注解
52. SpringMVC_异常处理_ResponseStatusExceptionResolver
53. SpringMVC_异常处理_DefaultHandlerExceptionResolver
54. SpringMVC_异常处理_SimpleMappingExceptionResolver
55. SpringMVC_运行流程图解
springmvc.xml
<?xml version="1.0" encoding="UTF-8"?> <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/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!-- 配置自动扫描的包 --> <context:component-scan base-package="com.atguigu.springmvc"></context:component-scan> <!-- 配置视图解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views/"></property> <property name="suffix" value=".jsp"></property> </bean> <!-- default-servlet-handler 将在 SpringMVC 上下文中定义一个 DefaultServletHttpRequestHandler, 它会对进入 DispatcherServlet 的请求进行筛查, 如果发现是没有经过映射的请求, 就将该请求交由 WEB 应用服务器默认的 Servlet 处理. 如果不是静态资源的请求,才由 DispatcherServlet 继续处理 一般 WEB 应用服务器默认的 Servlet 的名称都是 default. 若所使用的 WEB 服务器的默认 Servlet 名称不是 default,则需要通过 default-servlet-name 属性显式指定 --> <mvc:default-servlet-handler/> <mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven> <!-- 配置 ConversionService --> <bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"> <property name="converters"> <set> <ref bean="employeeConverter"/> </set> </property> </bean> <!-- 配置国际化资源文件 --> <bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource"> <property name="basename" value="i18n"></property> </bean> <!-- 配置 SessionLocalResolver --> <bean id="localeResolver" class="org.springframework.web.servlet.i18n.SessionLocaleResolver"></bean> <mvc:interceptors> <!-- 配置自定义的拦截器 --> <bean class="com.atguigu.springmvc.interceptors.FirstInterceptor"></bean> <!-- 配置拦截器(不)作用的路径 --> <mvc:interceptor> <mvc:mapping path="/emps"/> <bean class="com.atguigu.springmvc.interceptors.SecondInterceptor"></bean> </mvc:interceptor> <!-- 配置 LocaleChanceInterceptor --> <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"></bean> </mvc:interceptors> <!-- <mvc:view-controller path="/i18n" view-name="i18n"/> --> <mvc:view-controller path="/i18n2" view-name="i18n2"/> <!-- 配置 MultipartResolver --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="UTF-8"></property> <property name="maxUploadSize" value="1024000"></property> </bean> <!-- 配置使用 SimpleMappingExceptionResolver 来映射异常 --> <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <property name="exceptionAttribute" value="ex"></property> <property name="exceptionMappings"> <props> <prop key="java.lang.ArrayIndexOutOfBoundsException">error</prop> </props> </property> </bean> </beans>
EmployeeHandler.Java
@Controller public class EmployeeHandler { @Autowired private EmployeeDao employeeDao; @Autowired private DepartmentDao departmentDao; @ModelAttribute public void getEmployee(@RequestParam(value="id",required=false) Integer id, Map<String, Object> map){ if(id != null){ map.put("employee", employeeDao.get(id)); } } @RequestMapping(value="/emp", method=RequestMethod.PUT) public String update(Employee employee){ employeeDao.save(employee); return "redirect:/emps"; } @RequestMapping(value="/emp/{id}", method=RequestMethod.GET) public String input(@PathVariable("id") Integer id, Map<String, Object> map){ map.put("employee", employeeDao.get(id)); map.put("departments", departmentDao.getDepartments()); return "input"; } @RequestMapping(value="/emp/{id}", method=RequestMethod.DELETE) public String delete(@PathVariable("id") Integer id){ employeeDao.delete(id); return "redirect:/emps"; } @RequestMapping(value="/emp", method=RequestMethod.POST) public String save(@Valid Employee employee, Errors result, Map<String, Object> map){ System.out.println("save: " + employee); if(result.getErrorCount() > 0){ System.out.println("出错了!"); for(FieldError error:result.getFieldErrors()){ System.out.println(error.getField() + ":" + error.getDefaultMessage()); } //若验证出错, 则转向定制的页面 map.put("departments", departmentDao.getDepartments()); return "input"; } employeeDao.save(employee); return "redirect:/emps"; } @RequestMapping(value="/emp", method=RequestMethod.GET) public String input(Map<String, Object> map){ map.put("departments", departmentDao.getDepartments()); map.put("employee", new Employee()); return "input"; } @RequestMapping("/emps") public String list(Map<String, Object> map){ map.put("employees", employeeDao.getAll()); return "list"; } // @InitBinder // public void initBinder(WebDataBinder binder){ // binder.setDisallowedFields("lastName"); // } }
SpringMVCTest.java
@Controller public class SpringMVCTest { @Autowired private EmployeeDao employeeDao; @Autowired private ResourceBundleMessageSource messageSource; @RequestMapping("/testSimpleMappingExceptionResolver") public String testSimpleMappingExceptionResolver(@RequestParam("i") int i){ String [] vals = new String[10]; System.out.println(vals[i]); return "success"; } @RequestMapping(value="/testDefaultHandlerExceptionResolver",method=RequestMethod.POST) public String testDefaultHandlerExceptionResolver(){ System.out.println("testDefaultHandlerExceptionResolver..."); return "success"; } @ResponseStatus(reason="测试",value=HttpStatus.NOT_FOUND) @RequestMapping("/testResponseStatusExceptionResolver") public String testResponseStatusExceptionResolver(@RequestParam("i") int i){ if(i == 13){ throw new UserNameNotMatchPasswordException(); } System.out.println("testResponseStatusExceptionResolver..."); return "success"; } // @ExceptionHandler({RuntimeException.class}) // public ModelAndView handleArithmeticException2(Exception ex){ // System.out.println("[出异常了]: " + ex); // ModelAndView mv = new ModelAndView("error"); // mv.addObject("exception", ex); // return mv; // } /** * 1. 在 @ExceptionHandler 方法的入参中可以加入 Exception 类型的参数, 该参数即对应发生的异常对象 * 2. @ExceptionHandler 方法的入参中不能传入 Map. 若希望把异常信息传导页面上, 需要使用 ModelAndView 作为返回值 * 3. @ExceptionHandler 方法标记的异常有优先级的问题. * 4. @ControllerAdvice: 如果在当前 Handler 中找不到 @ExceptionHandler 方法来出来当前方法出现的异常, * 则将去 @ControllerAdvice 标记的类中查找 @ExceptionHandler 标记的方法来处理异常. */ // @ExceptionHandler({ArithmeticException.class}) // public ModelAndView handleArithmeticException(Exception ex){ // System.out.println("出异常了: " + ex); // ModelAndView mv = new ModelAndView("error"); // mv.addObject("exception", ex); // return mv; // } @RequestMapping("/testExceptionHandlerExceptionResolver") public String testExceptionHandlerExceptionResolver(@RequestParam("i") int i){ System.out.println("result: " + (10 / i)); return "success"; } @RequestMapping("/testFileUpload") public String testFileUpload(@RequestParam("desc") String desc, @RequestParam("file") MultipartFile file) throws IOException{ System.out.println("desc: " + desc); System.out.println("OriginalFilename: " + file.getOriginalFilename()); System.out.println("InputStream: " + file.getInputStream()); return "success"; } @RequestMapping("/i18n") public String testI18n(Locale locale){ String val = messageSource.getMessage("i18n.user", null, locale); System.out.println(val); return "i18n"; } @RequestMapping("/testResponseEntity") public ResponseEntity<byte[]> testResponseEntity(HttpSession session) throws IOException{ byte [] body = null; ServletContext servletContext = session.getServletContext(); InputStream in = servletContext.getResourceAsStream("/files/abc.txt"); body = new byte[in.available()]; in.read(body); HttpHeaders headers = new HttpHeaders(); headers.add("Content-Disposition", "attachment;filename=abc.txt"); HttpStatus statusCode = HttpStatus.OK; ResponseEntity<byte[]> response = new ResponseEntity<byte[]>(body, headers, statusCode); return response; } @ResponseBody @RequestMapping("/testHttpMessageConverter") public String testHttpMessageConverter(@RequestBody String body){ System.out.println(body); return "helloworld! " + new Date(); } @ResponseBody @RequestMapping("/testJson") public Collection<Employee> testJson(){ return employeeDao.getAll(); } @RequestMapping("/testConversionServiceConverer") public String testConverter(@RequestParam("employee") Employee employee){ System.out.println("save: " + employee); employeeDao.save(employee); return "redirect:/emps"; } }