FreemarkerUtil工具类

来源：互联网发布：linux基础入门教程编辑：程序博客网时间：2024/06/07 01:05

package com.mmiku.basic.util;

import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.Map;

import org.apache.commons.io.output.FileWriterWithEncoding;

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

public class FreemarkerUtil {
   private static FreemarkerUtil util;
   private static Configuration cfg;
   private FreemarkerUtil() {
   }

   public static FreemarkerUtil getInstance(String pname) {
       if(util==null) {
           cfg = new Configuration();
           cfg.setClassForTemplateLoading(FreemarkerUtil.class, pname);
           cfg.setDefaultEncoding("utf-8");
           util = new FreemarkerUtil();
       }
       return util;
   }

   private Template getTemplate(String fname) {
       try {
           return cfg.getTemplate(fname);
       } catch (IOException e) {
           e.printStackTrace();
       }
       return null;
   }
   /**
   * 通过标准输出流输出模板的结果
   * @param root 数据对象
   * @param fname 模板文件
   */
   public void sprint(Map<String,Object> root,String fname) {
       try {
           Template template = getTemplate(fname);
           template.setEncoding("utf-8");
           template.process(root, new PrintWriter(System.out));
       } catch (TemplateException e) {
           e.printStackTrace();
       } catch (IOException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
   }

   /**
   * 基于文件的输出
   * @param root
   * @param fname
   * @param outpath
   */
   public void fprint(Map<String,Object> root,String fname,String outpath) {
       try {
           Template template = getTemplate(fname);
           template.setEncoding("utf-8");
           template.process(root, new FileWriterWithEncoding(outpath, "utf-8"));
       } catch (TemplateException e) {
           e.printStackTrace();
       } catch (IOException e) {
           e.printStackTrace();
       }
   }
}

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