java-语言实现豆瓣电影信息查询

豆瓣上面有很多电影，有时候要查看个电影信息，去豆瓣搜下还是很方便的，但是如何通过接口的形式来查看豆瓣电影，这对于很多网站、app 其实是非常实用的功能，这里笔者附上一个 java 实现的豆瓣电影信息获取的代码，有兴趣的可以看看：

package com.xiaocongjisuan.module.example;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

public class Application {
    
     public static final String DEF_CHATSET = "UTF-8";
     public static final int DEF_CONN_TIMEOUT = 30000;
     public static final int DEF_READ_TIMEOUT = 30000;
     public static String userAgent =  "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36";
     
     // 配置您申请的 appKey 和 openId
     public static final String APP_KEY ="yours";
     public static final String OPEN_ID ="yours";
     
     // 将 map 型转为请求参数型
     public static String urlEncode(Map<String,Object> params) {if(params==null){return "";};
         
        StringBuilder sb = new StringBuilder();
        for (Map.Entry<String,Object> i : params.entrySet()) {
            try {sb.append(i.getKey()).append("=").append(URLEncoder.encode(i.getValue()+"","UTF-8")).append("&");
            } catch (UnsupportedEncodingException e) {e.printStackTrace();
            }
        }
        String r=sb.toString();
        if(r.endsWith("&")){r = r.substring(0,r.length()-1);
        }
        return r;
     }
     
     /**
     *
     * @param requestUrl 请求地址
     * @param params 请求参数
     * @param method 请求方法
     * @return 请求结果
     * @throws Exception
     */
     public static String requestContent(String requestUrl, Map<String,Object> params,String method) throws Exception {
        
        HttpURLConnection conn = null;
        BufferedReader reader = null;
        String rs = null;
        try {

            // 组装请求链接
            StringBuffer sb = new StringBuffer();
            
            if(method!=null&&method.equalsIgnoreCase("get")){requestUrl = requestUrl+"?"+urlEncode(params);
            }

            // 默认 get
            URL url = new URL(requestUrl);
            conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            
            if(method!=null&&method.equalsIgnoreCase("post")){conn.setRequestMethod("POST");
                 conn.setDoOutput(true);
                 conn.setDoInput(true);
            }

            // 参数配置
            conn.setRequestProperty("User-agent", userAgent);
            conn.setUseCaches(false);
            conn.setConnectTimeout(DEF_CONN_TIMEOUT);
            conn.setReadTimeout(DEF_READ_TIMEOUT);
            conn.setInstanceFollowRedirects(false);
            conn.connect();
            
            if (params!= null && method.equalsIgnoreCase("post")) {
                try {DataOutputStream out = new DataOutputStream(conn.getOutputStream());
                    out.writeBytes(urlEncode(params));
                } catch (Exception e) {e.printStackTrace();
                }
            }
            
            // 读取数据
            InputStream is = conn.getInputStream();
            reader = new BufferedReader(new InputStreamReader(is, DEF_CHATSET));
            String strRead = null;
            while ((strRead = reader.readLine()) != null) {sb.append(strRead);
            }
            rs = sb.toString();} catch (IOException e) {e.printStackTrace();
        } finally {if (reader != null) {reader.close();
            }
            if (conn != null) {conn.disconnect();
            }
        }
        return rs;
    }
    
    
    public static void main(String[] args) throws Exception{
        
        String domain="http://api.xiaocongjisuan.com/";
        String servlet="data/filmresource/get";
        String method="get";
        
        String requestUrl=domain+servlet;
        Map<String,Object> params=new HashMap<String,Object>();
        params.put("appKey",APP_KEY);
        params.put("openId",OPEN_ID);

        // 变动部分
        params.put("q","哪吒降世");
        params.put("field","name");
        params.put("currentPage",1);
        params.put("pageSize",10);
        params.put("order","down");
        params.put("sortField","rating");
        
        
        String result=requestContent(requestUrl,params,method);
        System.out.println(result);
    }
}

其他语言的实现方式其实也很简单，可以看这篇帖子：电影信息查询