用java实现将html保存为word时，生成的word字体显示样式和html中的相同。请问，怎样改变字体样式

java源代码如下：

package format.conversion;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;

import javax.swing.JFileChooser;
import javax.swing.filechooser.FileNameExtensionFilter;

import org.apache.poi.poifs.filesystem.DirectoryEntry;
import org.apache.poi.poifs.filesystem.DocumentEntry;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

public class HtmlToDoc {

public static void main(String[] args) throws Exception {
        HtmlToDoc test=new HtmlToDoc();
        test.go();
   }

public void go(){
try{
String FilePath="C:/Tomcat/apache-tomcat-7.0.42/webapps/Export-Report/Report.html";
String url = new File(FilePath).toURI().toURL().toString();
System.out.println(url);
JFileChooser fileSave=new JFileChooser(".");

FileNameExtensionFilter extension=new FileNameExtensionFilter("doc files(.doc)","doc");
fileSave.setFileFilter(extension);

        fileSave.showSaveDialog(null);
        File file=fileSave.getSelectedFile();
        if(!file.getPath().endsWith(".doc")){
         file=new File(file.getPath()+".doc");
        }
        String outputFile =file.toString();
writeWordFile(FilePath,outputFile);
System.out.println("word文件保存成功！");
System.out.println("文件保存路径为："+new File(outputFile).toURI().toURL());
}catch(Exception ex){
System.out.println("word文件保存失败！");
}

}

    public boolean writeWordFile(String filepath,String outputFile) throws Exception {
           boolean flag = false;
           ByteArrayInputStream bais = null;
           FileOutputStream fos = null;
           try {
                  if (!"".equals(outputFile)) {

                                String content = readFile(filepath);
                                byte b[] = content.getBytes();
                                bais = new ByteArrayInputStream(b);
                                POIFSFileSystem poifs = new POIFSFileSystem();
                                DirectoryEntry directory = poifs.getRoot();
                                DocumentEntry documentEntry = directory.createDocument("WordDocument", bais);
                                fos = new FileOutputStream(outputFile);
                                poifs.writeFilesystem(fos);
                                bais.close();
                                fos.close();

                  }

           } catch (IOException e) {
                  e.printStackTrace();
           } finally {
                  if(fos != null) fos.close();
                  if(bais != null) bais.close();
           }
           return flag;
    }

    public String readFile(String filename) throws Exception {
           StringBuffer buffer = new StringBuffer("");
           BufferedReader br = null;
           try {
                  br = new BufferedReader(new FileReader(filename));
                  buffer = new StringBuffer();
                  while (br.ready())
                         buffer.append((char) br.read());
           } catch (Exception e) {
                  e.printStackTrace();
           } finally {
                  if(br!=null) br.close();
           }
           return buffer.toString();
    }
} --------------------编程问答-------------------- 自己顶一下。。。。

补充：Java ,  Java相关