豆瓣API获取书籍详细信息（Java代码）

import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpMethod; import org.apache.commons.httpclient.HttpStatus; import org.apache.commons.httpclient.URIException; import org.apache.commons.httpclient.methods.GetMethod; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.commons.httpclient.params.HttpMethodParams; import org.apache.commons.httpclient.util.URIUtil; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.json.JSONException; import org.json.JSONObject; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.HashMap; import java.util.Iterator; import java.util.Map; public final class HttpTookit { private static Log log = LogFactory.getLog(HttpTookit.class); //Http Get public static String doGet(String url, String queryString, String charset, boolean pretty) { StringBuffer response = new StringBuffer(); HttpClient client = new HttpClient(); HttpMethod method = new GetMethod(url); try { if (queryString!=null) method.setQueryString(URIUtil.encodeQuery(queryString)); client.executeMethod(method); if (method.getStatusCode() == HttpStatus.SC_OK) { BufferedReader reader = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(), charset)); String line; while ((line = reader.readLine()) != null) { if (pretty) response.append(line).append(System.getProperty("line.separator")); else response.append(line); } reader.close(); } } catch (URIException e) { log.error("HTTP Get " + queryString + " 失败", e); } catch (IOException e) { log.error("HTTP Get " + queryString + " 失败", e); } finally { method.releaseConnection(); } return response.toString(); } //Http Post public static String doPost(String url, Map<String, String> params, String charset, boolean pretty) { StringBuffer response = new StringBuffer(); HttpClient client = new HttpClient(); HttpMethod method = new PostMethod(url); if (params != null) { HttpMethodParams p = new HttpMethodParams(); for (Map.Entry<String, String> entry : params.entrySet()) { p.setParameter(entry.getKey(), entry.getValue()); } method.setParams(p); } try { client.executeMethod(method); if (method.getStatusCode() == HttpStatus.SC_OK) { BufferedReader reader = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream(), charset)); String line; while ((line = reader.readLine()) != null) { if (pretty) response.append(line).append(System.getProperty("line.separator")); else response.append(line); } reader.close(); } } catch (IOException e) { log.error("HTTP Post " + url + " 失败", e); } finally { method.releaseConnection(); } return response.toString(); } //解析json数据 public static Map<String, String> toMap(String jsonString) throws JSONException { JSONObject jsonObject = new JSONObject(jsonString); Map<String, String> result = new HashMap<String, String>(); Iterator<?> iterator = jsonObject.keys(); String key = null; String value = null; while (iterator.hasNext()) { key = (String) iterator.next(); value = jsonObject.getString(key); result.put(key, value); } return result; } //获取书籍信息 public static void bookinfo(String uri) { String y = doGet(uri, null, "UTF-8", true); y=y.replace("\"", "'"); y=y.replaceAll("\\\\","/"); y=y.replaceAll("//","/"); Map<String, String> map=null; try { map = toMap(y); } catch (JSONException e) { System.out.println("失败"); e.printStackTrace(); } iteator(map); print(map); } public static void iteator(Map<String, String> map){ Iterator<?> iter = map.entrySet().iterator(); String key,value; while(iter.hasNext()) { Map.Entry entry = (Map.Entry)iter.next(); key = (String)entry.getKey(); value = (String)entry.getValue(); System.out.println(key+" "+value); } } //根据需要，输出书籍信息 public static void print(Map<String, String> map){ System.out.println("***********************"); System.out.println("标题： "+map.get("title")); String author=map.get("author").toString(); author=author.replace("[", ""); author=author.replace("]", ""); author=author.replace("\"", ""); System.out.println("作者： "+author); System.out.println("价格： "+map.get("price")); System.out.println("出版社： "+map.get("publisher")); System.out.println("出版日期： "+map.get("pubdate")); System.out.println("ISBN13： "+map.get("isbn13")); Map<String, String> map2=null; try { map2=toMap(map.get("images").toString().replace("\"", "'")); } catch (JSONException e) { e.printStackTrace(); } System.out.println("封面图片(小): "+map2.get("small")); System.out.println("封面图片(中): "+map2.get("medium")); System.out.println("封面图片(大): "+map2.get("large")); } public static void main(String[] args) { String isbn="9787302423287"; String uri="https://api.douban.com/v2/book/isbn/"+isbn; bookinfo(uri); } }