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;
}
}
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