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@RequestMapping("callback")
public void callback(HttpServletRequest request, HttpServletResponse response) throws Exception {
    InputStream inputStream =  request.getInputStream();

    //BufferedReader是包装设计模式，性能更搞
    BufferedReader in =  new BufferedReader(new InputStreamReader(inputStream,"UTF-8"));
    StringBuffer sb = new StringBuffer();
    String line ;
    while ((line = in.readLine()) != null){
        sb.append(line);

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import com.google.gson.Gson;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

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import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import net.xdclass.xdvideo.domain.User;

import java.util.Date;

/**
 * jwt工具类
 */

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import org.w3c.dom.Entity;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;

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import java.security.MessageDigest;
import java.util.UUID;

/**
 * 常用工具类的封装，md5,uuid等
 */
public class CommonUtils {


    /**

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import java.net.InetAddress;
import java.net.UnknownHostException;

import javax.servlet.http.HttpServletRequest;

public class IpUtils {
    public static String getIpAddr(HttpServletRequest request) {
        String ipAddress = null;
        try {
            ipAddress = request.getHeader("x-forwarded-for");

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//不知道为什么有些 cookie 获取不到，只能通过这种方式解决
//这一次的用法是，先在 WebBrowser 登录贴吧网页版，然后将 http://tieba.baidu.com/mo/ 传给 GetCookie 方法
//就可以获取到所有 cookie
//需要引入 System.Net 并 using System.Net;

//下面这段代码作为内部类，如何使用在后面

internal static class CookieReader
{
    /// <summary>

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new Date(data.updated).toLocaleString();

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public static String decrypt(String encrypted) {

    String KEY = ")O[NB]6,YF}+efcaj{+oESb9d8>Z'e9M";
    String IV = "L+\\~f4,Ir)b$=pkf";
    try {
        IvParameterSpec iv = new IvParameterSpec(IV.getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(KEY.getBytes("UTF-8"), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);

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// 创建 Map
Map<String, String> map = new HashMap<>();

// 添加元素
map.put("1", "张三");
map.put("2", "李四");
map.put("3", "王五");

// 获取存放键值的集合
// Map 并没有 iterator 方法，所以不能 map.iterator() 获取迭代器