【邮件处理】邮件eml文件解析--688IT编程网

【邮件处理】邮件eml⽂件解析

邮件eml⽂件解析

最近有个需求是下载⽂件服务器上备份的邮件eml⽂件并解析，之后对解析出来的邮件Message进⾏处理

⼤体流程

下载eml⽂件⽣成InputStream流

解析成Message对象

获取Message对象的各种属性进⾏处理

jar包版本

javax.mail-1.5.6.jar

遇到的坑

eml解析后的message⽆法获取邮件内容

//下载eml⽂件

byte[] bytes =downloadEml();

//eml⽂件解析成message

Properties props =new Properties();

Session session = Instance(props);

InputStream inputStream =new ByteArrayInputStream(bytes);

MimeMessage message =new MimeMessage(session, inputStream);

但是获取邮件的附件信息的时候出现了报错

MimeMessageParser mimeMessageParser =new MimeMessageParser((MimeMessage) message).parse();

这⾥报了个错，错误如下：

DecodingException: BASE64Decoder: Error in encoded stream: needed 4 valid base64 characters but only got 2 before EOF, the 10 mos t recent characters were:"JSVFT0YK\r\n"

at BASE64DecoderStream.decode(BASE64DecoderStream.java:260)

ad(BASE64DecoderStream.java:144)

at BufferedInputStream.fill(BufferedInputStream.java:246)

ad(BufferedInputStream.java:265)

Content(MimeMessageParser.java:429)

ateDataSource(MimeMessageParser.java:273)

at MimeMessageParser.parse(MimeMessageParser.java:207)

at MimeMessageParser.parse(MimeMessageParser.java:201)

at MimeMessageParser.parse(MimeMessageParser.java:95)

at EmailServiceImpl.saveAttachments(EmailServiceImpl.java:261)

at EmailServiceImpl.processFailEmails(EmailServiceImpl.java:214)

st(TestController.java:53)

at TestController$$FastClassBySpringCGLIB$$cabfcef5.invoke(<generated>)

at MethodProxy.invoke(MethodProxy.java:218)

at CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:771)

at ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)

at CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749)

at MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)

at LogAspectUtil.doAround(LogAspectUtil.java:57)

at NativeMethodAccessorImpl.invoke0(Native Method)

at NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at Method.invoke(Method.java:498)

at AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)

at AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)

at AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)

at ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)

at CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749)

at MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:88)

at LogMDC.doAround(LogMDC.java:48)

at NativeMethodAccessorImpl.invoke0(Native Method)

at NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at Method.invoke(Method.java:498)

at AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)

at AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)

at AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)

at ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)

at CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749)

at ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95)

at ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)

at CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749)

at CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:691)

at TestController$$EnhancerBySpringCGLIB$$st(<generated>)

at NativeMethodAccessorImpl.invoke0(Native Method)

at NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at Method.invoke(Method.java:498)

java streamat InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)

at InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)

at ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) at RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java :878)

at RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) at AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)

at DispatcherServlet.doDispatch(DispatcherServlet.java:1040)

at DispatcherServlet.doService(DispatcherServlet.java:943)

at FrameworkServlet.processRequest(FrameworkServlet.java:1006)

at FrameworkServlet.doGet(FrameworkServlet.java:898)

at HttpServlet.service(HttpServlet.java:626)

at FrameworkServlet.service(FrameworkServlet.java:883)

at HttpServlet.service(HttpServlet.java:733)

at ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)