根据isbn获得图书的所有信息

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几点说明

1这个豆瓣的api
https://api.douban.com/v2/book/isbn/:9787549208869
可以以json的形式返回书籍的所有信息
2最开始的时候是我自己写的用代码模拟http请求(参考的是http://www.jb51.net/article/47070.htm)
但不知道为何会有乱码问题有乱码不怕怕的就是并不是所有的中文都是乱码例如在返回出版社信息的时候长江出版社这几个字长江出版可以显示但是那个社就是两个问号头疼了好长时间
3 写这个的时候还碰到一个问题就是关于字符替换 replace 与replaceAll 后者使用的是正则表达式而且把\变成/ 着实让我头疼了一下
最后的效果
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;/*** HTTP工具箱** @author leizhimin 2009-6-19 16:36:18* @author dlf 2014 12 20 00:19 */public final class HttpTookit {        private static Log log = LogFactory.getLog(HttpTookit.class);        /**         * 执行一个HTTP GET请求，返回请求响应的HTML         *         * @param url                 请求的URL地址         * @param queryString 请求的查询参数,可以为null         * @param charset         字符集         * @param pretty            是否美化         * @return 返回请求响应的HTML         */        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)                                //对get请求参数做了http请求默认编码，好像没有任何问题，汉字编码后，就成为%式样的字符串                                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("执行HTTP Get请求时，编码查询字符串“" + queryString + "”发生异常！", e);                } catch (IOException e) {                        log.error("执行HTTP Get请求" + url + "时，发生异常！", e);                } finally {                        method.releaseConnection();                }                return response.toString();        }        /**         * 执行一个HTTP POST请求，返回请求响应的HTML         *         * @param url         请求的URL地址         * @param params    请求的查询参数,可以为null         * @param charset 字符集         * @param pretty    是否美化         * @return 返回请求响应的HTML         */        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);                //设置Http Post数据                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("执行HTTP Post请求" + url + "时，发生异常！", e);                } finally {                        method.releaseConnection();                }                return response.toString();        }                /***         * 将json转换为map         * @param jsonString         * @return         * @throws JSONException         */        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;        }        public static void main(String[] args) {            String isbn="9787560612850";            String uri="https://api.douban.com/v2/book/isbn/:"+isbn;            parse(uri);        }        public static void parse(String uri)  {                String y = doGet(uri, null, "UTF-8", true);            //    System.out.println(y);                y=y.replace("\"", "'");  //将得到的json数据中的双引号改为单引号                                y=y.replaceAll("\\\\","/");   //以下步骤将\改为/(url有用)                y=y.replaceAll("//","/");            //    System.out.println(y);                Map<String, String> map=null;                try {                    map = toMap(y);                } catch (JSONException e) {                    // TODO Auto-generated catch block                    System.out.println("解析错误");                    e.printStackTrace();                }                                iteator(map);                print(map);               }        /***         * 打印书的所有信息         * @param 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);             }        }                        /***         * 打印书的关键信息         * @param map         */        public static  void print(Map<String, String> map){            System.out.println("*********");            System.out.println("书名  "+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("原价格  "+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("isbn  "+map.get("isbn10"));            Map<String, String> map2=null;            try {                map2=toMap(map.get("images").toString().replace("\"", "'"));            } catch (JSONException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }            System.out.println("small images "+map2.get("small"));            System.out.println("medium images "+map2.get("medium"));            System.out.println("small large "+map2.get("large"));                    }}
参考资料

//http://lavasoft.blog.51cto.com/62575/175911/
//http://www.cnblogs.com/lanxuezaipiao/archive/2013/05/24/3096437.html
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