- Java 双重比较
- java - 比较器与 Apache BeanComparator
- Objective-C 完成 block 导致额外的方法调用?
- database - RESTful URI 是否应该公开数据库主键?
我想使用@ControllerAdvice 在一处处理所有异常。我已经编写了通用的异常处理程序类,它是:
@ControllerAdvice(basePackageClasses = RepositoryRestExceptionHandler.class)
public class GenericRepositoryRestExceptionHandler{
@Autowired
MessageSource messageSource;
@ExceptionHandler
ResponseEntity<?> handleConflict(DataIntegrityViolationException e) {
return response(HttpStatus.CONFLICT, 40901, "Operation cannot be performed. Integrity Constraint violated", e.getRootCause().getMessage(), "");
}
@ExceptionHandler(InconsistentEditException.class)
ResponseEntity<?> handleInconsistentEditException(InconsistentEditException e){
return response(HttpStatus.CONFLICT, 40902, e.getMessage());
}
private ResponseEntity<RestError> response(HttpStatus status, int code, String msg) {
return response(status, code, msg, "", "");
}
private ResponseEntity<RestError> response(HttpStatus status, int code, String msg, String devMsg, String moreInfo) {
return new ResponseEntity<>(new RestError(status.value(), code, msg, devMsg, moreInfo), status);
}
}
此异常处理程序适用于数据库操作抛出的异常:DataIntegrityViolationException 但不适用于我的自定义异常:InconsistentEditException,即:
public class InconsistentEditException extends RuntimeException{
public InconsistentEditException(String message){
super(message);
}
public InconsistentEditException(String message, Throwable cause){
super(message, cause);
}
}
它为我的自定义异常返回此响应:
{
"timestamp":1484673344950,
"status":500,
"error":"Internal Server Error",
"exception":"com.example.vmi.exception.InconsistentEditException",
"message":"Operation restricted to prevent data Inconsistency.",
"path":"/api/fits/2"
}
我期待这样的回应:
{
"status":409,
"code":40902,
"message":"Operation restricted to prevent data Inconsistency.",
"devMessage":"",
"moreInfo":""
}
我不知道为什么异常处理程序不处理自定义异常。我错过了什么?
编辑:添加抛出自定义异常的类。
@Service
@Transactional(readOnly = true)
public class FitService {
private final Logger logger = LoggerFactory.getLogger(BuyerService.class);
@Autowired FitRepository fitRepository;
@Autowired SKURepository skuRepository;
public Fit findOne(Integer id) {
return fitRepository.findOne(id);
}
public Fit findOne(String name) {
return fitRepository.findByName(name);
}
@Transactional
public Fit updateFit(Fit fit){
System.out.println("No. of Skus: " + skuRepository.countByFit(fit));
if (skuRepository.countByFit(fit) > 0){
throw new InconsistentEditException("Operation restricted to prevent data Inconsistency.");
}
Fit fit2 = fitRepository.findOne(fit.getId());
fit2.setName(fit.getName());
return fit2;
}
}
日志堆栈跟踪:
2017-01-18 20:42:02.425 INFO 18256 --- [nio-8080-exec-3] c.e.v.restcontroller.FitRestController : updateFit(): /fits/2
No. of Skus: 1
2017-01-18 20:42:02.584 ERROR 18256 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is com.example.vmi.exception.InconsistentEditException: Operation restricted to prevent data Inconsistency.] with root cause
com.example.vmi.exception.InconsistentEditException: Operation restricted to prevent data Inconsistency.
at com.example.vmi.service.FitService.updateFit(FitService.java:35) ~[classes/:na]
at com.example.vmi.service.FitService$$FastClassBySpringCGLIB$$155dc44a.invoke(<generated>) ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:720) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655) ~[spring-aop-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at com.example.vmi.service.FitService$$EnhancerBySpringCGLIB$$37f0f724.updateFit(<generated>) ~[classes/:na]
at com.example.vmi.restcontroller.FitRestController.updateFit(FitRestController.java:31) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:220) ~[spring-web-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134) ~[spring-web-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116) ~[spring-webmvc-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) ~[spring-webmvc-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) ~[spring-webmvc-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) ~[spring-webmvc-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPut(FrameworkServlet.java:883) ~[spring-webmvc-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:651) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) ~[spring-webmvc-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.6.jar:8.5.6]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:115) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilterInternal(BasicAuthenticationFilter.java:215) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:121) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177) ~[spring-security-web-4.1.3.RELEASE.jar:4.1.3.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) ~[spring-web-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) ~[spring-web-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108) [tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) [tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) [tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784) [tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802) [tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410) [tomcat-embed-core-8.5.6.jar:8.5.6]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.6.jar:8.5.6]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_101]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_101]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.6.jar:8.5.6]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]
提前感谢您的帮助。
最佳答案
您缺少一个注释:
@EnableWebMvc
@ControllerAdvice
public class GenericRepositoryRestExceptionHandler{
@Autowired
MessageSource messageSource;
@ResponseBody
@ExceptionHandler
ResponseEntity<?> handleConflict(DataIntegrityViolationException e) {
return response(HttpStatus.CONFLICT, 40901, "Operation cannot be performed. Integrity Constraint violated", e.getRootCause().getMessage(), "");
}
@ResponseBody
@ExceptionHandler(InconsistentEditException.class)
ResponseEntity<?> handleInconsistentEditException(InconsistentEditException e){
return response(HttpStatus.CONFLICT, 40902, e.getMessage());
}
private ResponseEntity<RestError> response(HttpStatus status, int code, String msg) {
return response(status, code, msg, "", "");
}
private ResponseEntity<RestError> response(HttpStatus status, int code, String msg, String devMsg, String moreInfo) {
return new ResponseEntity<>(new RestError(status.value(), code, msg, devMsg, moreInfo), status);
}
}
是你要找的。
删除 basePackages
解决了问题。
关于java - Spring 启动 : Handle Custom Exceptions using ControllerAdvice for REST,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41703720/
我想使用foreach 来等待线程终止。但是,出现以下错误,没有实现。请告诉我。 cannot move out of `*handle` which is behind a shared refer
如果在TypoScript中未配置给定的typeNum,则TYPO3将抛出Exception/CMS/1294587217。 背景:从另一个系统迁移到TYPO3后,我们遇到了许多此类异常,因为在那里使
我需要一个带有 2 个 handle 的 slider ,一个可拖动,另一个固定。我正在使用 Jquery UI slider 。这是我到目前为止尝试过的:http://jsfiddle.net/8K
给定文件的HANDLE(例如C:\\FolderA\\file.txt),我想要一个函数,该函数会将HANDLE返回到包含的目录(在前面的示例中,它将是C:\\FolderA的HANDLE)。例如:
我想通过Automic在Unix中检查文件。如果该文件不存在,则应切换主机并检查文件是否存在。 问题是,我现在不执行错误处理。 每当脚本对象正在处理并且找不到文件时,skript都会中止。我在skri
鉴于: fruitid('Apple', 'Granny Smith', 1). fruitid('Apple', 'Cox', 2). fruitid('Pear', 'Bartlett', 3).
我有一个基于Spring的Wicket应用程序。 有一个池化的数据源bean。 现在,当MySQL死了时,我得到了带有堆栈跟踪的默认Wicket错误页面。 我想处理这种情况,只允许某些页面完全显示(静
我希望能够一次查询多个句柄,其中表格具有相同的格式,例如: 句柄:8000,8001,8003表:foo 想要做这样的事情: x:hopen `8000`8001`8003 x select from
我对在Swift 3中引发自定义异常有些困惑。 在C++中,我可以执行此操作以立即停止方法中的进程,抛出错误并进行处理,而无需进一步进行操作。 void foo() { try {
我一直在阅读MSDN开发人员COM指南。但是this page上的代码令人困惑。在此处复制: The following code sample shows the recommended way o
我有一个计划的批处理文件每天都会启动的过程。如果有错误,我需要内置错误处理才能重启进程。所有这些在大多数情况下都有效,但是我每个月都会收到一次超时错误,所以这是不可避免的。该进程不会将错误级别输出到b
我正在尝试从 chartlyrics API 获取歌词。我编写了一个可以运行但不能在循环内运行的 R 函数。我的脚本是: library(httr) library(RCurl) library(XM
在libuv事件循环中调用prepare handle callback和check handle callback的原因是什么? 最佳答案 I/O 操作发生在这两者之间,因此您可能希望在阻塞 I/O
我正在尝试在 R 中安装 BTYplus 包。 devtools::install_github("mplatzer/BTYDplus", dependencies=TRUE) library(BTY
我有一个Arduino,可以使用pySerialTransfer库通过串行与Mac正常通信,并且可以运行数小时。然后是某种形式的串行中断-尽管一夜间发生时我一直无法确定原因,但只要从笔记本电脑上拔下A
我是hooks和async/await的新手。我正在尝试处理Axios调用中的错误,并且不确定如何使用then/catch或try/catch处理我的API调用中的错误。 在基于类的React中,我将
我正在尝试向脚本中添加一些内容,以便让我知道我复制的文件是否已被完全复制。 基本上,我要压缩一堆文件,然后将它们发送到网络上的映射驱动器。然后,一旦文件被成功复制,我将脚本删除原始位置的文件。该脚本可
我有一个圆形 slider ,其中绘制了一条贝塞尔弧,一个圆弧在 slider 的起点和终点有两个 handle ,圆弧是在圆形 slider 中绘制的。 借助开始和结束 handle ,我可以沿着圆
删除 NULL 指针是安全的。 int* p = NULL; delete p; // ok, secure 句柄是什么? HANDLE h = NULL; CloseHandle(h
如果您没有在 dojo.connect 期间返回的“句柄”,您如何删除 dojo 连接事件? 我的示例涉及将一组事件动态分配给一组对象。 (为简单起见,事件是 onclick 和 ondblclick
我是一名优秀的程序员,十分优秀!