<button>使用注意问题

　　最近在项目的上传功能下（IE8）发现了如下的错误：

　　

2015-08-13 09:14:03,396 WARN   [WARN] [http-8080-5] : Handler execution resulted in exception
ClientAbortException:  java.net.SocketException: Connection reset by peer: socket write error
 at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:369)
 at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:448)
 at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:318)
 at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:296)
 at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:98)
 at org.codehaus.jackson.impl.Utf8Generator.flush(Utf8Generator.java:1091)
 at org.codehaus.jackson.map.ObjectMapper.writeValue(ObjectMapper.java:1615)
 at org.springframework.http.converter.json.MappingJacksonHttpMessageConverter.writeInternal(MappingJacksonHttpMessageConverter.java:142)
 at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:181)
 at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.writeWithMessageConverters(AnnotationMethodHandlerAdapter.java:996)
 at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.handleResponseBody(AnnotationMethodHandlerAdapter.java:954)
 at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter$ServletHandlerMethodInvoker.getModelAndView(AnnotationMethodHandlerAdapter.java:903)
 at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:438)
 at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:669)
 at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:585)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:643)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at com.speed.base.filter.SessionPowerFilter.doFilter(SessionPowerFilter.java:89)
 at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
 at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
 at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:620)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
 at java.lang.Thread.run(Thread.java:662)
Caused by: java.net.SocketException: Connection reset by peer: socket write error
 at java.net.SocketOutputStream.socketWrite0(Native Method)
 at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
 at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
 at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:761)
 at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:448)
 at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:363)
 at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:785)
 at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:126)
 at org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:598)
 at org.apache.coyote.Response.doWrite(Response.java:533)
 at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:364)
 ... 40 more

　　虽然不会导致程序停止运行，但也是一个bug,于是利用火狐浏览器 firebug调试下，观看控制台如下图：

发现此操作显示进行了上面的一个请求，而查看代码表面上看本次请求没有触发的地方，由于单击上传按钮已经跳转到了上传的页面，但是还是触发了原页面的刷新事件，所以，会造成上面的异常，最后在调试了很久发现原来是单击上传<button>的同时，会进行表单的提交，参看如下代码：

html:

<button id="publicTask" class="btn1">上传</button>

js:

$('#publicTask').click(function(){
  window.location.href="/taskUploadAction_addPublicTaskForPage.do";
 });

后来发现<button>标签未指定type时，点击button时进行了提交操作,所以我们要想仅仅使用其的click功能，就要注意加上type="button"，下面是官方的解释：

Internet Explorer 的默认类型是 "button"，而其他浏览器中（包括 W3C 规范）的默认值是 "submit"。

http://www.w3school.com.cn/tags/tag_button.asp

所以谨以此提醒自己今后要注意！！！