JavaMail java.lang.NullPointerException

使用JavaMail发送邮件出现如下的错误：

[ERROR,DispatcherServlet,http-88-6] Could not complete request

java.lang.NullPointerException

        at com.sun.mail.handlers.text_plain.writeTo(text_plain.java:140)

        at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:89

7)

        at javax.activation.DataHandler.writeTo(DataHandler.java:330)

        at javax.mail.internet.MimeUtility.getEncoding(MimeUtility.java:261)

        at javax.mail.internet.MimeBodyPart.updateHeaders(MimeBodyPart.java:1321

)

        at javax.mail.internet.MimeBodyPart.updateHeaders(MimeBodyPart.java:1030

)

        at javax.mail.internet.MimeMultipart.updateHeaders(MimeMultipart.java:41

6)

        at javax.mail.internet.MimeBodyPart.updateHeaders(MimeBodyPart.java:1307

)

        at javax.mail.internet.MimeMessage.updateHeaders(MimeMessage.java:2074)

        at javax.mail.internet.MimeMessage.saveChanges(MimeMessage.java:2042)

        at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1742)

        at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:636)

        at com.dongyun.publ.util.SendMail.send(SendMail.java:147)

        at com.dongyun.publ.service.publish.PublishBean.sendMails(PublishBean.ja

va:100)

        at com.dongyun.publ.service.publish.PublishBean.publishDocByMap(PublishB

ean.java:132)

        at com.dongyun.publ.action.ArchivesAction.handleRequest(ArchivesAction.j

ava:277)

        at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.ha

ndle(SimpleControllerHandlerAdapter.java:44)

        at org.springframework.web.servlet.DispatcherServlet.doDispatch(Dispatch

erServlet.java:717)

        at org.springframework.web.servlet.DispatcherServlet.doService(Dispatche

rServlet.java:658)

        at org.springframework.web.servlet.FrameworkServlet.processRequest(Frame

workServlet.java:392)

        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServ

let.java:357)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)

        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl

icationFilterChain.java:290)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF

ilterChain.java:206)

        at com.dongyun.publ.util.CharacterEncodingFilter.doFilter(CharacterEncod

ingFilter.java:23)

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl

icationFilterChain.java:235)

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF

ilterChain.java:206)

        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV

alve.java:233)

        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV

alve.java:175)

        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j

ava:128)

        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j

ava:102)

        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal

ve.java:109)

        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav

a:263)

        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java

:844)

        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce

ss(Http11Protocol.java:584)

        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44

7)

        at java.lang.Thread.run(Thread.java:595)

 我在网上找了半天也没找到答案，把JavaMail版本更新到1.4.1也有问题。

后来终于找到，原来自己给MimeMessage的content设成null

所以报错，但JavaMail提示也不准确。

评论

2 楼 coldrain2014 2014-11-19  

在线api文档 http://online.code1314.com/apidocs/
在线教程    http://www.code1314.com/

1 楼 狂放不羁 2008-05-18  

呵呵。多谢。我也遇到了这个问题，确实是那样。