前端下载文档的java工具类

package com.ry.project.util.commUtil;

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

import java.io.*;
import java.util.Map;

public class WordUtil {
    private Configuration configuration = null;

    public WordUtil() {
        configuration = new Configuration();
        configuration.setDefaultEncoding("utf-8");
    }
//指定下载路径
    public void createDoc(Map<String, Object> dataMap, String fileName) throws UnsupportedEncodingException {
        configuration.setClassForTemplateLoading(this.getClass(), "/");
        Template doct = null;
        try {
            doct = configuration.getTemplate("infoModel.ftl", "utf-8");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        File outfile = new File(fileName);

        Writer out = null;
        FileOutputStream outputStream = null;

        try {
            outputStream = new FileOutputStream(outfile);
            OutputStreamWriter oWriter = new OutputStreamWriter(outputStream, "UTF-8");
            out = new BufferedWriter(oWriter);

        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        try {
            doct.process(dataMap, out);
            out.close();
            outputStream.close();

        } catch (TemplateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
//不指定下载路径，，，默认浏览器下载，需要在代码中设置请求头
    public void createDoc(Map<String, Object> dataMap, OutputStream outfil) throws UnsupportedEncodingException {

        configuration.setClassForTemplateLoading(this.getClass(), "/");
        System.out.println(">>>>>class:" + this.getClass());
        Template doct = null;
        try {
            doct = configuration.getTemplate("model.ftl", "utf-8");
        } catch (IOException e) {
            e.printStackTrace();
        }
        Writer out = null;
        OutputStreamWriter oWriter = new OutputStreamWriter(outfil, "UTF-8");
        out = new BufferedWriter(oWriter);

        try {
            doct.process(dataMap, out);
            System.out.println("《《《《《《《《下载结束》》》》》");
            out.close();

        } catch (TemplateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

response.reset();//清除空白行纺织报错
response.setHeader("Access-Control-Allow-Origin", "*");//所有域都可以跨
response.setHeader("Content-Type", "application/octet-stream;charset=UTF-8");//二进制  流文件
response.setHeader("Content-Disposition", "attachment;filename=" + endCodeFileName+".doc");//下载及其文件名
response.setHeader("Connection", "close");//关闭请求头连接
//设置文件在浏览器打开还是下载
response.setContentType("application/x-download");

}