項目工具類

一、前言

    在工作中，難免遇到各種各樣的問題，每個人似乎都有一套自己的解決方案。而我，又不想每次解決完問題就把東西扔了，撿了芝麻，丟了西瓜，什麼時候才能進步勒？學習要靠積累，畢竟量變才能引起質變嘛。所以寫了這篇博文，不定時更新自己項目中遇到的問題、踩過的那些坑......

二、項目

1、Java 將兩張圖片合成一張圖片

/**
     * 圖片合併
     */
    public String joinImage(String url1, String url2) {

        try {
            InputStream is1 = getImgConn(url1);
            InputStream is2 = getImgConn(url2);

            BufferedImage image1 = ImageIO.read(is1);
            BufferedImage image2 = ImageIO.read(is2);
            BufferedImage combined = new BufferedImage(image1.getWidth() * 2, image1.getHeight(), BufferedImage.TYPE_INT_RGB);
            Graphics g = combined.getGraphics();
            g.drawImage(image1, 0, 0, null);
            g.drawImage(image2, image1.getWidth(), 0, null);
            String imgURL=System.currentTimeMillis()+".jpg";
            ImageIO.write(combined, "JPG", new File("/home/wwwroot/picFiles",imgURL));
            return "/home/wwwroot/picFiles/"+imgURL;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    //讀文件
    private  InputStream getImgConn(String url){
        try {
            URL url1 = new URL(url);
            URLConnection urlConnection = url1.openConnection();
            InputStream is1 = urlConnection.getInputStream();
            //先讀入記憶體
            ByteArrayOutputStream buf = new ByteArrayOutputStream(8192);
            byte[] b = new byte[1024];
            int len;
            while ((len = is1.read(b)) != -1) {
                buf.write(b, 0, len);
            }
            is1=new ByteArrayInputStream(buf.toByteArray());
            return is1;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return null;
    }

    /**
     * 圖片合併
     */
    public static String joinImage(File file1, File file2) {
        BufferedImage image1 = null;
        BufferedImage image2 = null;
        try {
            image1 = ImageIO.read(file1);
            image2 = ImageIO.read(file2);
            BufferedImage combined = new BufferedImage(image1.getWidth() * 2, image1.getHeight(), BufferedImage.TYPE_INT_RGB);
            Graphics g = combined.getGraphics();
            g.drawImage(image1, 0, 0, null);
            g.drawImage(image2, image1.getWidth(), 0, null);
            String imgURL=System.currentTimeMillis()+".jpg";
            ImageIO.write(combined, "JPG", new File("/home/wwwroot/picFiles",imgURL));
            return "/home/wwwroot/picFiles/"+imgURL;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

2、通過經緯度獲得高德地圖返回的具體地址

/**
     * 獲取經緯度的確切位置
     * @param lat 經度
     * @param lon 維度
     * @param type type 001 (100代表道路，010代表POI，001代表門址，111可以同時顯示前三項)
     * @return
     */
    private String getLocByLonAndLat(String lat,String lon,String type){
        String urlString = "http://gc.ditu.aliyun.com/regeocoding?l="+lat+","+lon+"&type="+type;
        String res = "";
        BufferedReader in=null;
        try {
            URL url = new URL(urlString);
            HttpURLConnection conn = (HttpURLConnection)url.openConnection();
            conn.setDoOutput(true);
            conn.setRequestMethod("POST");
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(),"UTF-8"));
            String line;
            while ((line = in.readLine()) != null) {
                res += line+"\n";
            }
            JSONObject jsonObject = JSONObject.fromObject(res);
            JSONArray addrList =(JSONArray)jsonObject.get("addrList");
            JSONObject o =(JSONObject)addrList.get(0);
            String s = o.get("admName").toString() + o.get("addr").toString();
            return StringUtils.remove(s,",");
        } catch (Exception e) {
            System.out.println("error in wapaction,and e is " + e.getMessage());
        }finally {
            try {
                in.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }