package com.sipai.controller.base;

import java.io.BufferedWriter;
import java.io.File;
import java.io.StringWriter;
import java.util.Map;

import freemarker.template.Configuration;
import freemarker.template.Template;

public class HtmlGenerator {
	 /**  
     * Generate html string.  
     *   
     * @param template   the name of freemarker teamlate.  
     * @param variables  the data of teamlate.  
     * @return htmlStr  
     * @throws Exception  
     */  
    public static String generate(String templateFile, Map<String,Object> variables) throws Exception{   
    	File file = new File(templateFile);
		if(!file.exists())
			throw new Exception("模板文件不存在："+templateFile);
		
		String templateDir = file.getParentFile().getPath();
		String templateName =file.getName();
        Configuration config = FreemarkerConfiguration.getConfiguation();   
        //用于解决前端报空指针问题-->
        config.setClassicCompatible(true);
        config.setDirectoryForTemplateLoading(new File(templateDir));
        Template tp = config.getTemplate(templateName);   
        StringWriter stringWriter = new StringWriter();     
        BufferedWriter writer = new BufferedWriter(stringWriter);     
        tp.setEncoding("UTF-8");     
        tp.process(variables, writer);     
        String htmlStr = stringWriter.toString();   
        writer.flush();     
        writer.close();   
        return htmlStr;   
    }   
}