Question

我正在使用javax.mail API将错误消息从Java cron作业发送到我的私人收件箱。出错时，我将堆栈跟踪传递给我的电子邮件正文。问题是此过程不保留Java代码结构。换行显然被忽略了。当电子邮件到达时，正文如下：

java.lang.Exception: BackUp folder for BatchClass D_DE_KABI_DELIVERY_NOTES_V03 not found. at FncApplicationLevelScript.importFromMultiFolders(FncApplicationLevelScript.java:378) at FncApplicationLevelScript.execute(FncApplicationLevelScript.java:151) at sun.reflect.GeneratedMethodAccessor431.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at com.ephesoft.dcma.script.compiler.DynamicCodeCompiler$MyInvocationHandler.invoke(DynamicCodeCompiler.java:364) at com.sun.proxy.$Proxy256.execute(Unknown Source) at com.ephesoft.dcma.script.ScriptExecutor.executeApplicationScript(ScriptExecutor.java:305) at com.ephesoft.dcma.script.service.ScriptServiceImpl.executeApplicationScript(ScriptServiceImpl.java:115) at sun.reflect.GeneratedMethodAccessor427.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.aop.aspectj.AspectJAfterThrowingAdvice.invoke(AspectJAfterThrowingAdvice.java:58) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) at com.sun.proxy.$Proxy175.executeApplicationScript(Unknown Source) at sun.reflect.GeneratedMethodAccessor424.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:269) at org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean$MethodInvokingJob.executeInternal(MethodInvokingJobDetailFactoryBean.java:321) at org.springframework.scheduling.quartz.QuartzJobBean.execute(QuartzJobBean.java:111) at org.quartz.core.JobRunShell.run(JobRunShell.java:216) at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)

虽然我希望它看起来像这样：

...
Caused by: java.io.FileNotFoundException: 
C:\Ephesoft\SharedFolders\BC4E47\script- 
config\BC4E47_batchClassProperties.properties (The system cannot find the 
file specified)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at fncBatchUtils.FncBatchUtils.loadPropertyFile(FncBatchUtils.java:140)
at fncBatchUtils.FncBatchUtils.<init>(FncBatchUtils.java:94)
at fncBatchUtils.FncMail.<init>(FncMail.java:247)
at ScriptAutomaticValidation.execute(ScriptAutomaticValidation.java:79)
at sun.reflect.GeneratedMethodAccessor910.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.ephesoft.dcma.script.compiler.DynamicCodeCompiler$MyInvocationHandler.invoke(DynamicCodeCompiler.java:364)
at com.sun.proxy.$Proxy258.execute(Unknown Source)
at com.ephesoft.dcma.script.ScriptExecutor.extractBatch(ScriptExecutor.java:455)
... 122 more

为了更好的可读性，我希望保留Java代码结构，特别是换行符。

我目前提取的错误信息如下：

try { ...
} catch (Exception e) {
    StringWriter sw = new StringWriter();
    e.printStackTrace(new PrintWriter(sw));
    String errorMessage = "Error occured...";
    String bodyText = sw.toString();
    String from = "capturing-development@xxx.com";
    sendMail(errorMessage, bodyText , from);
}

在sendMail方法中，bodyPart设置为包含错误堆栈跟踪（包含在bodyText中），如下所示：

Multipart multipart = new MimeMultipart();
MimeBodyPart messagePart = new MimeBodyPart();
String htmlMessage = "<p> " + bodyText + " </p><br>";
messagePart.setContent(htmlMessage, "text/html; charset=utf-8");
multipart.addBodyPart(messagePart);
message.setContent(multipart);

有什么方法可以告诉我的消息对象以可读的方式格式化bodyPart（即Java代码格式）？

Answer 1

您的问题是在HTML空格和换行符被忽略。在添加到邮件正文之前，您应尝试使用 标记替换换行符，或在每个右括号 后插入)。

Answer 2

尝试使用apache commons lang中的StringEscapeUtils.escapeHtml()，它可以处理相邻的空格和其他特殊字符

Answer 3

为什么不使用HtmlEmail电子邮件api - 将StringBuffer用于来自here的HTML示例

HtmlEmail he = new HtmlEmail();
 File img = new File("my/image.gif");
 PNGDataSource png = new PNGDataSource(decodedPNGOutputStream); // a custom class
 StringBuffer msg = new StringBuffer();
 msg.append("<html><body>");
 msg.append("<img src=cid:").append(he.embed(img)).append(">");
 msg.append("<img src=cid:").append(he.embed(png)).append(">");
 msg.append("</body></html>");
 he.setHtmlMsg(msg.toString());

Answer 4

以下是一个示例，您可以将html添加为正文内容，也可以附加文件。

        String text = "html tags";

        Multipart mainMultiPart = new MimeMultipart();  
        MimeBodyPart mimeBodyPart = new MimeBodyPart();
        mimeBodyPart.setText(text);
        mimeBodyPart.setContent(text, "text/html; charset=iso-8859-1""text/html; charset=iso-8859-1");
        mainMultiPart.addBodyPart(mimeBodyPart);

        java.io.File file = null;

        MimeBodyPart messageBodyPartFile = new MimeBodyPart();
        FileDataSource fds = new FileDataSource(file);      
        messageBodyPartFile.setDataHandler(new DataHandler(fds));       
        String fileName = fds.getName();        
        messageBodyPartFile.setFileName(fileName);      
        mainMultiPart.addBodyPart(messageBodyPartFile);     

        javax.mail.Message message = null;      
        message.setContent(mainMultiPart);

Answer 5

我刚刚使用这些标签解决了这个问题：

String htmlMessage = "<pre><code> " + bodyText + " </pre></code> ";

如何格式化javax.mail消息的bodyPart

5 个答案: