Java生成静态HTML文件

private static final String FILEPATH = "/opt/nginx/html/banner/";
    private static  final String RETURNPATH = "/banner/";

    private static final String IMAGEPATH="/image_app/scp_image/bannerimg/";

    private static final String TEMPLATE_PATH = "/opt/nginx/html/banner/modelHtml.html";

    @RequestMapping("/submit")
    @ResponseBody
    public Map<String, Object> submit(String imageUrl) {

        String str = "";
        StringBuffer buffer = new StringBuffer();
        String uuidFilePath = UUID.randomUUID().toString() +".html";
        try {

            /*URL url = new URL(SERVICE_PATH+SAVEHTMLPATH);
            HttpURLConnection httpUrl = (HttpURLConnection)url.openConnection();
            InputStream is = httpUrl.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is,"utf-8"));
            String line;
            while ((line = br.readLine()) != null) {
                buffer.append(line+"\n");
            }
            is.close();
            br.close();*/

            File file = new File(TEMPLATE_PATH);
            if (file.isFile() && file.exists()) {
                InputStreamReader read = new InputStreamReader(new FileInputStream(file), "utf-8");
                BufferedReader bufferedReader = new BufferedReader(read);
                String line = null;
                while ((line = bufferedReader.readLine()) != null) {
                    System.out.println(line);
                    buffer.append(line+"\n");
                }
                bufferedReader.close();
            }else{
                System.out.println("system erro");
            }

            str = buffer.toString().replaceAll("###imageUrl###", IMAGEPATH+imageUrl);

            String saveHtmlFile = FILEPATH + uuidFilePath;
            BufferedWriter bufferedWriter = new BufferedWriter(
                    new OutputStreamWriter(new FileOutputStream(saveHtmlFile), "UTF-8"));
            bufferedWriter.write(str);
            bufferedWriter.newLine();// 换行
            /*
             * * 刷新该流的缓冲。 关键的一行代码。如果没有加这行代码。数据只是保存在缓冲区中。没有写进文件。 加了这行才能将数据写入目的地。
             * *
             */
            bufferedWriter.flush();
            bufferedWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return APIUtil.toMap(HttpStatus.SUCCESS.getValue(), true, RETURNPATH+uuidFilePath);
    }

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;

public class MakeHtml {

    public static boolean JspToHtmlFile(String filePath, String saveHtmlFile) {
            String str = "";

            StringBuffer buffer = new StringBuffer();

            /*try {
                    String tempStr = "";
                    InputStreamReader isr = new InputStreamReader(new FileInputStream(filePath), "UTF-8");
                    BufferedReader br = new BufferedReader(isr);
                    while ((tempStr = br.readLine()) != null){
                         str = str + tempStr +"\n";
                    }
            } catch (IOException e) {
                    e.printStackTrace();
                    return false;
            }*/

            try {
                URL url = new URL(filePath);
                HttpURLConnection httpUrl = (HttpURLConnection)url.openConnection();
                InputStream is = httpUrl.getInputStream();
                BufferedReader br = new BufferedReader(new InputStreamReader(is,"utf-8"));
                StringBuilder sb = new StringBuilder();
                String line;
                while ((line = br.readLine()) != null) {
                    buffer.append(line+"\n");
                }
                is.close();
                br.close();
            } catch (Exception e) {

            }

            try {
                    str = buffer.toString().replaceAll("###imageUrl###","http://img.zcool.cn/community/0142135541fe180000019ae9b8cf86.jpg@1280w_1l_2o_100sh.png");
                    //必须设置编码格式不然会出现乱码
                    BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(saveHtmlFile),"UTF-8"));
                    bufferedWriter.write(str);
                    bufferedWriter.newLine();//换行
                    bufferedWriter.flush();
                    bufferedWriter.close();
            } catch (Exception e) {
                    e.printStackTrace();
                    return false;
            }
            return true;
    }

    public static void main(String[] args) {
        long begin = System.currentTimeMillis();
        String url = "http://xxx/banner/modelHtml.html";// 模板文件地址
        String savepath = "d:/" + begin + ".html";// 生成文件地址
        JspToHtmlFile(url, savepath);
        System.out.println("用时:" + (System.currentTimeMillis() - begin) + "ms");
    }
}