java使用freemarker技术生成word文档,亲测可用。附工具类和实际中代码应用

步骤一:
首先自己建立一个word文档, 然后另存为: xml (敲重点:一定要另存为,选择XML格式,如果直接在桌面改变文件类型会无效)
步骤二:
把相应的模板文件 改变后缀为 ” 模板名字.ftl ” 在项目中新建文件夹保存到项目中。这里写图片描述
步骤三:调用工具类,读取模板文件,并生成需要的word模板

public class WordGenerator2 {
    private static Configuration configuration = null;  
    private static Map<String, Template> allTemplates = null;  

    static {  
        configuration = new Configuration();  
        configuration.setDefaultEncoding("utf-8");  
        configuration.setClassForTemplateLoading(WordGenerator2.class, "/wordTempl");  
        allTemplates = new HashMap<>();   // Java 7 钻石语法  
        try {  
            allTemplates.put("回执模板", configuration.getTemplate("回执模板.ftl"));  
        } catch (IOException e) {  
            e.printStackTrace();  
            throw new RuntimeException(e);  
        }  
    }  

    private WordGenerator2() {  
        throw new AssertionError();  
    }  

    public static File createDoc(Map<?, ?> dataMap, String type) {  
        String name = "回执模板" + (int) (Math.random() * 100000) + ".doc";  
        File f = new File(name);  
        Template t = allTemplates.get(type);  
        try {  
            // 这个地方不能使用FileWriter因为需要指定编码类型否则生成的Word文档会因为有无法识别的编码而无法打开  
            Writer w = new OutputStreamWriter(new FileOutputStream(f), "utf-8");  
            t.process(dataMap, w);  
            w.close();  
        } catch (Exception ex) {  
            ex.printStackTrace();  
            throw new RuntimeException(ex);  
        }  
        return f;  
    }  
}

===上面是工具类, 下面是工具类的实际应用==web项目浏览器请求响应===

public void ReceiptListDownLoad(HttpServletRequest request, HttpServletResponse response) {

         try {
            request.setCharacterEncoding("utf-8");
        } catch (UnsupportedEncodingException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }  
            Map<String, Object> map = new HashMap<String, Object>();  
            Enumeration<String> paramNames = request.getParameterNames();  
            // 通过循环将表单参数放入键值对映射中  
            while(paramNames.hasMoreElements()) {  
                String key = paramNames.nextElement();  
                String value = request.getParameter(key);  
                map.put(key, value);  
            }  

            // 提示:在调用工具类生成Word文档之前应当检查所有字段是否完整  
            // 否则Freemarker的模板殷勤在处理时可能会因为找不到值而报错 这里暂时忽略这个步骤了  
            File file = null;  
            InputStream fin = null;  
            ServletOutputStream out = null;  
            try {  
                // 调用工具类WordGenerator的createDoc方法生成Word文档  
                file = WordGenerator2.createDoc(map, "HuiZhiTemp");  
                fin = new FileInputStream(file);  

                response.setCharacterEncoding("utf-8");  
              //输出中文,非常重要
                String uncod=URLDecoder.decode("验收模板.doc","UTF-8");
                String fileName = new String(uncod.getBytes("UTF-8"), "iso-8859-1");
                response.setHeader("Content-Disposition", "attachment;filename=".concat(String.valueOf(fileName)));
                response.setContentType("application/msword");  
                // 设置浏览器以下载的方式处理该文件默认名为resume.doc  


                out = response.getOutputStream();  
                byte[] buffer = new byte[512];  // 缓冲区  
                int bytesToRead = -1;  
                // 通过循环将读入的Word文件的内容输出到浏览器中  
                while((bytesToRead = fin.read(buffer)) != -1) {  
                    out.write(buffer, 0, bytesToRead);  
                }  
            } catch (IOException ie) {
//              // TODO Auto-generated catch block
                ie.printStackTrace();
            }finally {  
                if(fin != null)
                    try {
                        fin.close();
                        if(out != null) out.close();  
                        if(file != null) file.delete(); // 删除临时文件  
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }  
            }  
        }

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转载自blog.csdn.net/weixin_39917347/article/details/81706426