【Java工具三】Java调用百度API生成短链接

た入场券 2022-05-27 02:44 270阅读 0赞

package com.risenb.latestTools;
    
    import java.util.ArrayList;
    import java.util.List;
    import org.apache.http.HttpResponse;
    import org.apache.http.NameValuePair;
    import org.apache.http.client.HttpClient;
    import org.apache.http.client.entity.UrlEncodedFormEntity;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.message.BasicNameValuePair;
    import org.apache.http.util.EntityUtils;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONObject;
    
    
    /**
     * @author pc
     * 生成短网址并返回
     * Java调用百度API生成短网址
     */
    public class GenerateShortUrlUtil {
    
    	public static Logger logger = LoggerFactory.getLogger(GenerateShortUrlUtil.class);
    
    	public static HttpClient client;
    	static {
    		client = HttpClients.createDefault();
    	}
    
    	/**
    	 * 测试生成端连接
    	 * @param args
    	 */
    	public static void main(String []args){
    		generateShortUrl("https://blog.csdn.net/xuforeverlove");
    	}
    
    	/**
    	 * 生成短链接信息
    	 */
    	public static String  generateShortUrl(String url) {
    		String shortUrl = "";
    		try {
    			//httpPost请求
    			HttpPost httpost = new HttpPost("http://dwz.cn/create.php");
    			List<NameValuePair> params = new ArrayList<NameValuePair>();
    			//url长连接地址
    			params.add(new BasicNameValuePair("url", url));
    			httpost.setEntity(new UrlEncodedFormEntity(params,  "utf-8"));
    			HttpResponse response = client.execute(httpost);
    
    			String jsonStr = EntityUtils.toString(response.getEntity(), "utf-8");
    			//把字符串转为对象
    			JSONObject object = JSONObject.parseObject(jsonStr.replace("\\", ""));
    			//JSONObject parseObject = JSON.parseObject(jsonStr.replace("\\", ""));
    
    			//短连接地址
    			shortUrl = object.get("tinyurl").toString();
    
    			 System.out.println(object.get("tinyurl"));
    			//System.out.println(parseObject.get("tinyurl"));
    			/*{"tinyurl":"http://dwz.cn/7KKGUg","status":0,"longurl":"http://blog.csdn.net/xuforeverlove","err_msg":""}
                              System.out.println(jsonStr.replace("\\", ""));*/			
    		} catch (Exception e) {
    			logger.info("调取百度API错误!");
    		}
    		return shortUrl;
    
    	}
    }
    百度api返回短地址： http://dwz.cn/7KKGUg

============================================================================

附上生成短链接随机码方法:

package com.risenb.latestTools;
    
    import java.util.Random;
    
    import org.apache.commons.codec.digest.DigestUtils;
    
    
    /**
     * @author pc
     * 长链变短链
     */
    public class LongToBrokenChain {
    	public static void main(String[] args) {  
            // 长连接  
            String longUrl = "http://www.hufkodfsjdfkdjfr.com/loginController/homepage.json";  
            // 转换成的短链接后6位码  
            String[] shortCodeArray = shortUrl(longUrl);  
            for (int i = 0; i < shortCodeArray.length; i++) {  
                System.out.println(shortCodeArray[i]);// 任意一个都可以作为短链接码  
            } 
            
            shortUrl2();
            
    	}	
    	
    	/**
    	 * 生成6位的随机码
    	 * @param url
    	 * @return
    	 * 原理  当我们生成短链接之后，只需要在表中（数据库或者NoSql ）存储原始链接与短链接的映射关系即可。
    	 *	       当我们访问短链接时，只需要从映射关系中找到原始链接，即可跳转到原始链接。
    	 */
    	public static String[] shortUrl(String url) {  
            // 可以自定义生成 MD5 加密字符传前的混合 KEY  
            String key = "131400";  
            // 要使用生成 URL 的字符  
            String[] chars = new String[] { "a", "b", "c", "d", "e", "f", "g", "h",  
                    "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t",  
                    "u", "v", "w", "x", "y", "z", "0", "1", "2", "3", "4", "5",  
                    "6", "7", "8", "9", "A", "B", "C", "D", "E", "F", "G", "H",  
                    "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T",  
                    "U", "V", "W", "X", "Y", "Z" };  
      
            // 对传入网址进行 MD5 加密  
            String sMD5EncryptResult = DigestUtils.md5Hex(key + url);  
            String hex = sMD5EncryptResult;  
            String[] resUrl = new String[4];
            	for(int i = 0; i < 4; i++) {
            		// 把加密字符按照 8 位一组 16 进制与 0x3FFFFFFF 进行位与运算  
            		String sTempSubString = hex.substring(i * 8, i * 8 + 8);  
            		// 这里需要使用 long 型来转换，因为 Inteper .parseInt() 只能处理 31 位 , 首位为符号位 , 如果不用  
            		// long ，则会越界  
            		long lHexLong = 0x3FFFFFFF & Long.parseLong(sTempSubString, 16);  
            		String outChars = "";  
            		for (int j = 0; j < 6; j++) {  
            			// 把得到的值与 0x0000003D 进行位与运算，取得字符数组 chars 索引  
            			long index = 0x0000003D & lHexLong;  
            			// 把取得的字符相加  
            			outChars += chars[(int) index];  
            			// 每次循环按位右移 5 位  
            			lHexLong = lHexLong >> 5;  
            		}  
            		// 把字符串存入对应索引的输出数组  
                    resUrl[i] = outChars; 
            	}
            return resUrl;  
        }  
    	
    	/**
    	 * 生成7位的短连接
    	 */
    	public static void shortUrl2() {
    		
    		/** 网址长度为7 */
    	    final int LENGTH = 7;
    
    	    /** 每右移5位，生成一个字符 */
    	    final int PER_VARCHAR = 5;
    
    	    char[] c = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e',
    	            'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
    	            'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U',
    	            'V', 'W', 'X', 'Y', 'Z' };
    	    
    		 // 2的35次方，每五位一个字符，可生成7个字符
            // 11111111111111111111111111111111111
            long long16 = (long) Math.pow(2, PER_VARCHAR * LENGTH) - 1;
    
            // TODO md5-32位实现
            String a = "F7491217829C527F3E81C1FCBB26C9F9";
    
            // 生成随机数，使之成为35长度
            // 每8字符=32位，加3位=111
            Random random = new Random();
            int nextInt = random.nextInt(8);
    
            int subIndexStart = 0;
            while (subIndexStart < a.length()) {
                StringBuffer sb = new StringBuffer();
                // 8位一组，使用16进行转换，可转换成 4*8=32长度二进制
                String substring = a.substring(subIndexStart, subIndexStart += 8);
                long parseLong = Long.parseLong(nextInt + substring, 16);
    
                long x = long16 & parseLong;
    
                for (int j = 0; j < LENGTH; j++) {
                    long x2 = (c.length - 1) & x;
                    sb.append(c[(int) x2]);
                    x = x >> PER_VARCHAR;
                }
                System.out.println(sb);
            }
    	}
    }

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