重新学习SpringMVC——高级
作者：互联网
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";
}
}
标签：return,String,SpringMVC,重新学习,高级,println,public,RequestMapping 来源： https://www.cnblogs.com/gzhcsu/p/11699723.html