短链接生成

package com.shinedata;

import com.google.gson.Gson;
import com.google.gson.annotations.SerializedName;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * @ClassName BaiduDwz
 * @Author yupanpan
 * @Date 2019/9/27 13:57
 */
public class BaiduDwz {

    final static String CREATE_API = "https://dwz.cn/admin/v2/create";
    final static String TOKEN = "TOKEN";//你的TOken

    class UrlResponse {
        @SerializedName("Code")
        private int code;

        @SerializedName("ErrMsg")
        private String errMsg;

        @SerializedName("LongUrl")
        private String longUrl;

        @SerializedName("ShortUrl")
        private String shortUrl;

        public int getCode() {
            return code;
        }

        public void setCode(int code) {
            this.code = code;
        }

        public String getErrMsg() {
            return errMsg;
        }

        public void setErrMsg(String errMsg) {
            this.errMsg = errMsg;
        }

        public String getLongUrl() {
            return longUrl;
        }

        public void setLongUrl(String longUrl) {
            this.longUrl = longUrl;
        }

        public String getShortUrl() {
            return shortUrl;
        }

        public void setShortUrl(String shortUrl) {
            this.shortUrl = shortUrl;
        }
    }

    /**
     * 创建短网址
     *
     * @param longUrl
     *            长网址：即原网址
     *        termOfValidity
     *            有效期：默认值为long-term
     * @return  成功：短网址
     *          失败：返回空字符串
     */
    public static String createShortUrl(String longUrl, String termOfValidity) {
        String params = "{\"Url\":\""+ longUrl + "\",\"TermOfValidity\":\""+ termOfValidity + "\"}";

        BufferedReader reader = null;
        try {
            // 创建连接
            URL url = new URL(CREATE_API);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setDoOutput(true);
            connection.setDoInput(true);
            connection.setUseCaches(false);
            connection.setInstanceFollowRedirects(true);
            connection.setRequestMethod("POST"); // 设置请求方式
            connection.setRequestProperty("Content-Type", "application/json"); // 设置发送数据的格式
            connection.setRequestProperty("Token", TOKEN); // 设置发送数据的格式");

            // 发起请求
            connection.connect();
            OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream(), "UTF-8"); // utf-8编码
            out.append(params);
            out.flush();
            out.close();

            // 读取响应
            reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
            String line;
            String res = "";
            while ((line = reader.readLine()) != null) {
                res += line;
            }
            reader.close();

            // 抽取生成短网址
            UrlResponse urlResponse = new Gson().fromJson(res, UrlResponse.class);
            if (urlResponse.getCode() == 0) {
                return urlResponse.getShortUrl();
            } else {
                System.out.println(urlResponse.getErrMsg());
            }
            return "";
        } catch (IOException e) {
            // TODO
            e.printStackTrace();
        }
        return "";
    }

    public static void main(String[] args) {
        String res = createShortUrl("https://me.csdn.net/ypp91zr","long-term");
        System.out.println(res);

    }

}

得到短链接是https://dwz.cn/8mJt5MDs     

百度有免费的10000点使用量 

百度短连接生成接口

新浪短连接生成接口

比较知名的还有腾讯、搜狐、搜狗等也有短链接服务

如果自己有域名以及服务器或者自己生成短链接，可以参考下面两篇文章总结的一些思路以及注意的地方

https://blog.csdn.net/bntx2jsqfehy7/article/details/80045503

https://blog.csdn.net/ithomer/article/details/81436493