今天遇到一个怪问题 ，之前都没遇到过。 我在页面的添加了STRUTS2的标签就报下面异常，不明白，以为是标签加载错误。
后来测试了以前的完好的文件，发现也是一样报错,网上看了些说可能是以下情况
1. servlet或jsp中，重复调用response的 getOutputStream()，response.getWriter()方法
2.form表单里没有 method="post" action=""参数
3.数据连接错误好像都没涉及到
严重: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at sun.net.www.MimeEntry.<clinit>(MimeEntry.java:31)
at sun.net.www.MimeTable.parse(MimeTable.java:290)
at sun.net.www.MimeTable.parse(MimeTable.java:258)
at sun.net.www.MimeTable.load(MimeTable.java:242)
at sun.net.www.MimeTable.<init>(MimeTable.java:58)
at sun.net.www.MimeTable$2.run(MimeTable.java:70)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.MimeTable.getDefaultTable(MimeTable.java:67)
at sun.net.www.MimeTable.loadTable(MimeTable.java:84)
at java.net.URLConnection.getFileNameMap(URLConnection.java:300)
at sun.net.www.protocol.file.FileURLConnection.initializeHeaders(FileURLConnection.java:99)
at sun.net.www.protocol.file.FileURLConnection.getHeaderField(FileURLConnection.java:126)
at sun.net.www.protocol.jar.JarURLConnection.getHeaderField(JarURLConnection.java:203)
at java.net.URLConnection.getHeaderFieldDate(URLConnection.java:603)
at java.net.URLConnection.getLastModified(URLConnection.java:532)
at freeer.cache.URLTemplateSource.lastModified(URLTemplateSource.java:93)
at freeer.cache.URLTemplateLoader.getLastModified(URLTemplateLoader.java:91)
at freeer.cache.MultiTemplateLoader$MultiSource.getLastModified(MultiTemplateLoader.java:161)
at freeer.cache.MultiTemplateLoader.getLastModified(MultiTemplateLoader.java:126)
at freeer.cache.TemplateCache.getTemplate(TemplateCache.java:349)
at freeer.cache.TemplateCache.getTemplate(TemplateCache.java:229)
at freeer.template.Configuration.getTemplate(Configuration.java:487)
at freeer.template.Configuration.getTemplate(Configuration.java:452)
at org.apache.struts2.components.template.FreeerTemplateEngine.renderTemplate(FreeerTemplateEngine.java:115)
at org.apache.struts2.components.UIBean.mergeTemplate(UIBean.java:530)
at org.apache.struts2.components.UIBean.end(UIBean.java:484)
at org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:43)
at org.apache.jsp.recruit_005f02_jsp._jspx_meth_s_005ftextfield_005f0(recruit_005f02_jsp.java:159)
at org.apache.jsp.recruit_005f02_jsp._jspService(recruit_005f02_jsp.java:113)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:416)
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:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.r
大侠们看看，什么问题
后来测试了以前的完好的文件，发现也是一样报错,网上看了些说可能是以下情况
1. servlet或jsp中，重复调用response的 getOutputStream()，response.getWriter()方法
2.form表单里没有 method="post" action=""参数
3.数据连接错误好像都没涉及到
严重: Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
at sun.net.www.MimeEntry.<clinit>(MimeEntry.java:31)
at sun.net.www.MimeTable.parse(MimeTable.java:290)
at sun.net.www.MimeTable.parse(MimeTable.java:258)
at sun.net.www.MimeTable.load(MimeTable.java:242)
at sun.net.www.MimeTable.<init>(MimeTable.java:58)
at sun.net.www.MimeTable$2.run(MimeTable.java:70)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.MimeTable.getDefaultTable(MimeTable.java:67)
at sun.net.www.MimeTable.loadTable(MimeTable.java:84)
at java.net.URLConnection.getFileNameMap(URLConnection.java:300)
at sun.net.www.protocol.file.FileURLConnection.initializeHeaders(FileURLConnection.java:99)
at sun.net.www.protocol.file.FileURLConnection.getHeaderField(FileURLConnection.java:126)
at sun.net.www.protocol.jar.JarURLConnection.getHeaderField(JarURLConnection.java:203)
at java.net.URLConnection.getHeaderFieldDate(URLConnection.java:603)
at java.net.URLConnection.getLastModified(URLConnection.java:532)
at freeer.cache.URLTemplateSource.lastModified(URLTemplateSource.java:93)
at freeer.cache.URLTemplateLoader.getLastModified(URLTemplateLoader.java:91)
at freeer.cache.MultiTemplateLoader$MultiSource.getLastModified(MultiTemplateLoader.java:161)
at freeer.cache.MultiTemplateLoader.getLastModified(MultiTemplateLoader.java:126)
at freeer.cache.TemplateCache.getTemplate(TemplateCache.java:349)
at freeer.cache.TemplateCache.getTemplate(TemplateCache.java:229)
at freeer.template.Configuration.getTemplate(Configuration.java:487)
at freeer.template.Configuration.getTemplate(Configuration.java:452)
at org.apache.struts2.components.template.FreeerTemplateEngine.renderTemplate(FreeerTemplateEngine.java:115)
at org.apache.struts2.components.UIBean.mergeTemplate(UIBean.java:530)
at org.apache.struts2.components.UIBean.end(UIBean.java:484)
at org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTagSupport.java:43)
at org.apache.jsp.recruit_005f02_jsp._jspx_meth_s_005ftextfield_005f0(recruit_005f02_jsp.java:159)
at org.apache.jsp.recruit_005f02_jsp._jspService(recruit_005f02_jsp.java:113)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:416)
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:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.r
大侠们看看，什么问题
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我用MYECLIPSE6.5.1 启动服务 正常启动 但一访问带有struts2标签的页面
就报错 ，随后再访问页面时 服务就知道停掉了。
我直接在DOS里启动就很正常 访问没有问题 ，但这样看不到控制台信息 ，对于开发不怎么方便。