freemarker使用

 

public class ExportHtmlUtil {

 

private static Configuration cfg;

 

    static{

        cfg = new Configuration();

    }

 

/**

* 通过freemark生成html文件 

* @param rootPath  文件生成后保存路径

* @param templetName  模板名字  ftl 文件

* @param genFileName  生成文件名字

* @param listLecture  参数

* @return

*/

public static boolean genFileByFtl(String templetDir, String  templetName ,String genFileName, List  listParam ){

 

//取得工程classes的目录 作为ftl模板的目录

File dir = new File(ExportHtmlUtil.class.getClassLoader().getResource("/").getPath() );

 

Writer out = null;

try {

//加载模板存放目录

cfg.setDirectoryForTemplateLoading( dir );

//模板中传递参数

       Map<String, Object> root = new HashMap<String, Object>();

       root.put("listUser", listParam );

       

//Template t = cfg.getTemplate(ExportHtmlUtil.class.getClassLoader().getResource("/").getPath()+templetName );

Template t = cfg.getTemplate( templetName );

out = new OutputStreamWriter(new FileOutputStream( genFileName ), "UTF-8");

 

t.process(root, out);

out.flush();

out.close();

} catch ( Exception e) {

 e.printStackTrace();

 return false;

}finally{

try {

if(out!=null){

out.close();

}

} catch (IOException e) {

e.printStackTrace();

}

}

 

 

return true;

}

}

 

---------------------------

 

public String downloadHtml()  {

FileInputStream fis = null;

OutputStream os =null;

try {

listLectureNote = lectureMng.getOneLecture(videoId,innerCwareID ,versionP );

List list = new ArrayList();

User user = new User();

user.setId(1);

user.setName("123");

user.setRealname("小王");

user.setAge(24);

String path = this.getRequest().getRealPath("/");

ExportHtmlUtil.genFileByFtl(path ,"entity.ftl"  , path+File.separator+"user.html" , list);

 

HttpServletResponse response = this.getResponse();

response.setContentType("application/x-download");//设置为下载application/x-download

response.addHeader("Content-Disposition","attachment;filename=user.html");

fis = new FileInputStream(new File(path+File.separator+"user.html" ));

os = this.getResponse().getOutputStream() ;

byte[] bs = new byte[1024];

int len;

while(   (len = fis.read(bs, 0,  bs.length ))!=-1){

os.write(bs , 0, len);

}

os.flush();

os.close();

fis.close();

} catch ( Exception e) {

e.printStackTrace();

}finally{

try {

if(os!=null){

os.close();

}

if(fis!=null){

fis.close();

}

} catch (IOException e) {

e.printStackTrace();

}

 

}

 

 

return null;

}

---------------------------------------------------

<#list listUser as user>

${r"<!--"} NodeText(${user.id!""},${user.name!""},${user.age!""}); ${r"-->"}

${user.realname!""}

${r"<!--"} NodeTextEnd();${r"-->"}

</#list>