网上搜索获得mht文件转html，稍作了修改，即可使用，在此做个笔记。

public class Mht2HtmlUtil {

public static void main(String[] args) {

Mht2HtmlUtil.mht2html("d:\\51job_111.mht", "d:\\test.htm");

}

/**

* 将 mht文件转换成 html文件

*

* @param s_SrcMht

* @param s_DescHtml

*/

public static void mht2html(String s_SrcMht, String s_DescHtml) {

try {

InputStream fis = new FileInputStream(s_SrcMht);

Session mailSession = Session.getDefaultInstance(

System.getProperties(), null);

MimeMessage msg = new MimeMessage(mailSession, fis);

Object content = msg.getContent();

if (content instanceof Multipart) {

MimeMultipart mp = (MimeMultipart) content;

MimeBodyPart bp1 = (MimeBodyPart) mp.getBodyPart(0);

// 获取mht文件内容代码的编码

String strEncodng = getEncoding(bp1);

// 获取mht文件的内容

String strText = getHtmlText(bp1, strEncodng);

if (strText == null)

return;

// 创建以mht文件名称的文件夹，主要用来保存资源文件。

File parent = null;

if (mp.getCount() > 1) {

parent = new File(new File(s_DescHtml).getAbsolutePath()

+ ".files");

parent.mkdirs();

if (!parent.exists()) { // 创建文件夹失败的话则退出

return;

}

}

// FOR中代码 主要是保存资源文件及替换路径

for (int i = 1; i < mp.getCount(); ++i) {

MimeBodyPart bp = (MimeBodyPart) mp.getBodyPart(i);

// 获取资源文件的路径

// 例(获取： http://xxx.com/abc.jpg)

String strUrl = getResourcesUrl(bp);

if (strUrl == null || strUrl.length() == 0)

continue;

DataHandler dataHandler = bp.getDataHandler();

MimePartDataSource source = (MimePartDataSource) dataHandler

.getDataSource();

// 获取资源文件的绝对路径

String FilePath = parent.getAbsolutePath() + File.separator

+ getName(strUrl, i);

File resources = new File(FilePath);

// 保存资源文件

if (SaveResourcesFile(resources, bp.getInputStream())) {

// 将远程地址替换为本地地址 如图片、JS、CSS样式等等

strText = strText.replace(strUrl,

resources.getAbsolutePath());

}

}

// 最后保存HTML文件

SaveHtml(strText, s_DescHtml, strEncodng);

}

} catch (Exception e) {

e.printStackTrace();

}

}

/**

* 获取mht文件内容中资源文件的名称

*

* @param strName

* @param ID

* @return

*/

public static String getName(String strName, int ID) {

char separator1 = "/";

char separator2 = "\\";

// 将换行替换

strName = strName.replaceAll("\r\n", "");

// 获取文件名称

if (strName.lastIndexOf(separator1) >= 0) {

return strName.substring(strName.lastIndexOf(separator1) + 1);

}

if (strName.lastIndexOf(separator2) >= 0) {

return strName.substring(strName.lastIndexOf(separator2) + 1);

}

return "";

}

/**

* 将提取出来的html内容写入保存的路径中。

*

* @param strText

* @param strHtml

* @param strEncodng

*/

public static boolean SaveHtml(String s_HtmlTxt, String s_HtmlPath,

String s_Encode) {

try {

Writer out = null;

out = new OutputStreamWriter(

new FileOutputStream(s_HtmlPath, false), s_Encode);

out.write(s_HtmlTxt);

out.close();

} catch (Exception e) {

return false;

}

return true;

}

/**

* 保存网页中的JS、图片、CSS样式等资源文件

*

* @param SrcFile

* 源文件

* @param inputStream

* 输入流

* @return

*/

private static boolean SaveResourcesFile(File SrcFile,

InputStream inputStream) {

if (SrcFile == null || inputStream == null) {

return false;

}

BufferedInputStream in = null;

FileOutputStream fio = null;

BufferedOutputStream osw = null;

try {

in = new BufferedInputStream(inputStream);

fio = new FileOutputStream(SrcFile);

osw = new BufferedOutputStream(new DataOutputStream(fio));

int index = 0;

byte[] a = new byte[1024];

while ((index = in.read(a)) != -1) {

osw.write(a, 0, index);

}

osw.flush();

return true;

} catch (Exception e) {

e.printStackTrace();

return false;

} finally {

try {

if (osw != null)

osw.close();

if (fio != null)

fio.close();

if (in != null)

in.close();

if (inputStream != null)

inputStream.close();

} catch (Exception e) {

e.printStackTrace();

return false;

}

}

}

/**

* 获取mht文件里资源文件的URL路径

*

* @param bp

* @return

*/

private static String getResourcesUrl(MimeBodyPart bp) {

if (bp == null) {

return null;

}

try {

Enumeration list = bp.getAllHeaders();

while (list.hasMoreElements()) {

javax.mail.Header head = (javax.mail.Header) list.nextElement();

if (head.getName().compareTo("Content-Location") == 0) {

return head.getValue();

}

}

return null;

} catch (MessagingException e) {

return null;

}

}

/**

* 获取mht文件中的内容代码

*

* @param bp

* @param strEncoding

* 该mht文件的编码

* @return

*/

private static String getHtmlText(MimeBodyPart bp, String strEncoding) {

InputStream textStream = null;

BufferedInputStream buff = null;

BufferedReader br = null;

Reader r = null;

try {

textStream = bp.getInputStream();

buff = new BufferedInputStream(textStream);

r = new InputStreamReader(buff, strEncoding);

br = new BufferedReader(r);

StringBuffer strHtml = new StringBuffer("");

String strLine = null;

while ((strLine = br.readLine()) != null) {

System.out.println(strLine);

strHtml.append(strLine + "\r\n");

}

br.close();

r.close();

textStream.close();

return strHtml.toString();

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

if (br != null)

br.close();

if (buff != null)

buff.close();

if (textStream != null)

textStream.close();

} catch (Exception e) {

}

}

return null;

}

/**

* 获取mht网页文件中内容代码的编码

*

* @param bp

* @return

*/

private static String getEncoding(MimeBodyPart bp) {

if (bp == null) {

return null;

}

try {

Enumeration list = bp.getAllHeaders();

while (list.hasMoreElements()) {

javax.mail.Header head = (javax.mail.Header) list.nextElement();

if (head.getName().equalsIgnoreCase("Content-Type")) {

String strType = head.getValue();

int pos = strType.indexOf("charset=");

if (pos >= 0) {

String strEncoding = strType.substring(pos + 8,

strType.length());

if (strEncoding.startsWith("\"")

|| strEncoding.startsWith("\"")) {

strEncoding = strEncoding.substring(1,

strEncoding.length());

}

if (strEncoding.endsWith("\"")

|| strEncoding.endsWith("\"")) {

strEncoding = strEncoding.substring(0,

strEncoding.length() - 1);

}

if (strEncoding.toLowerCase().compareTo("gb2312") == 0) {

strEncoding = "gbk";

}

return strEncoding;

}

}

}

} catch (MessagingException e) {

e.printStackTrace();

}

return null;

}

}