org.codehaus.jackson.map.JsonMappingException: No suitable constructor found for type [simple type, class com.douban.book.Book$Rating]: can not instantiate from JSON object (need to add/enable type information?)at [Source: java.io.StringReader@1cbfe9d; line: 1, column: 12] (through reference chain: com.douban.book.Book["rating"])at org.codehaus.jackson.map.JsonMappingException.from(JsonMappingException.java:163)at org.codehaus.jackson.map.deser.BeanDeserializer.deserializeFromObjectUsingNonDefault(BeanDeserializer.java:740)at org.codehaus.jackson.map.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:683)at org.codehaus.jackson.map.deser.BeanDeserializer.deserialize(BeanDeserializer.java:580)at org.codehaus.jackson.map.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:299)at org.codehaus.jackson.map.deser.SettableBeanProperty$MethodProperty.deserializeAndSet(SettableBeanProperty.java:414)at org.codehaus.jackson.map.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:697)at org.codehaus.jackson.map.deser.BeanDeserializer.deserialize(BeanDeserializer.java:580)at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2723)at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1854)at com.util.HttpIO.doPost(HttpIO.java:33)at com.douban.book.GetBookInfo.main(GetBookInfo.java:11)

org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "publisher" (Class com.douban.book.Book), not marked as ignorableat [Source: java.io.StringReader@1b8f864; line: 1, column: 852] (through reference chain: com.douban.book.Book["publisher"])at org.codehaus.jackson.map.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:53)at org.codehaus.jackson.map.deser.StdDeserializationContext.unknownFieldException(StdDeserializationContext.java:267)at org.codehaus.jackson.map.deser.std.StdDeserializer.reportUnknownProperty(StdDeserializer.java:649)at org.codehaus.jackson.map.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:635)at org.codehaus.jackson.map.deser.BeanDeserializer.handleUnknownProperty(BeanDeserializer.java:1355)at org.codehaus.jackson.map.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:717)at org.codehaus.jackson.map.deser.BeanDeserializer.deserialize(BeanDeserializer.java:580)at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2723)at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1854)at com.util.HttpIO.doPost(HttpIO.java:33)at com.douban.book.GetBookInfo.main(GetBookInfo.java:11)

org.codehaus.jackson.map.JsonMappingException: Can not deserialize instance of java.lang.String out of START_ARRAY tokenat [Source: java.io.StringReader@1112783; line: 1, column: 75] (through reference chain: com.douban.book.Book["author"])at org.codehaus.jackson.map.JsonMappingException.from(JsonMappingException.java:163)at org.codehaus.jackson.map.deser.StdDeserializationContext.mappingException(StdDeserializationContext.java:219)at org.codehaus.jackson.map.deser.std.StringDeserializer.deserialize(StringDeserializer.java:44)at org.codehaus.jackson.map.deser.std.StringDeserializer.deserialize(StringDeserializer.java:13)at org.codehaus.jackson.map.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:299)at org.codehaus.jackson.map.deser.SettableBeanProperty$MethodProperty.deserializeAndSet(SettableBeanProperty.java:414)at org.codehaus.jackson.map.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:697)at org.codehaus.jackson.map.deser.BeanDeserializer.deserialize(BeanDeserializer.java:580)at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2723)at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1854)at com.util.HttpIO.doPost(HttpIO.java:33)at com.douban.book.GetBookInfo.main(GetBookInfo.java:11)

package com.util;import java.io.IOException;import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.codehaus.jackson.map.ObjectMapper;import com.douban.book.Book;public class HttpIO
{public static void doPost(final String url, final String body){HttpClient httpclient = new DefaultHttpClient();ObjectMapper mapper = new ObjectMapper();HttpPost post = new HttpPost(url);try{HttpResponse result = httpclient.execute(post);if (result.getStatusLine().getStatusCode() == 200){String str = EntityUtils.toString(result.getEntity());System.out.println(str);Book book = mapper.readValue(str, Book.class);System.out.println(book);}}catch(ClientProtocolException e){e.printStackTrace();}catch(IOException e){e.printStackTrace();}}
}

package com.douban.book;import com.util.HttpIO;//http://api.douban.com/v2/book/1220562
public class GetBookInfo
{public static void main(String[] args){HttpIO.doPost("http://api.douban.com/v2/book/1220562",null);}
}

package com.douban.book;import java.util.List;public class Book
{private String publisher;public String id;private String alt;private Rating rating;private List<String> author;private String alt_title;private Images images;private String title;private String mobile_link;private String summary;private Attrs attrs;private List<Tags> tags;private String subtitle;private String pubdate;private String isbn10;private String isbn13;private String url;private String author_intro;private String price;private String origin_title;private String binding;private String catalog;private String pages;private String image;private List<String> translator;public List<String> getTranslator(){return translator;}public void setTranslator(List<String> translator){this.translator = translator;}public String getImage(){return image;}public void setImage(String image){this.image = image;}public Images getImages(){return images;}public void setImages(Images images){this.images = images;}public String getBinding(){return binding;}public void setBinding(String binding){this.binding = binding;}public String getCatalog(){return catalog;}public void setCatalog(String catalog){this.catalog = catalog;}public String getPages(){return pages;}public void setPages(String pages){this.pages = pages;}static class Images{private String small;private String large;private String medium;public String getSmall(){return small;}public void setSmall(String small){this.small = small;}public String getLarge(){return large;}public void setLarge(String large){this.large = large;}public String getMedium(){return medium;}public void setMedium(String medium){this.medium = medium;}}public String getOrigin_title(){return origin_title;}public void setOrigin_title(String origin_title){this.origin_title = origin_title;}public Book(){}public Book(String str){}public String getPubdate(){return pubdate;}public void setPubdate(String pubdate){this.pubdate = pubdate;}public String getIsbn10(){return isbn10;}public void setIsbn10(String isbn10){this.isbn10 = isbn10;}public String getIsbn13(){return isbn13;}public void setIsbn13(String isbn13){this.isbn13 = isbn13;}public String getUrl(){return url;}public void setUrl(String url){this.url = url;}public String getAuthor_intro(){return author_intro;}public void setAuthor_intro(String author_intro){this.author_intro = author_intro;}public String getPrice(){return price;}public void setPrice(String price){this.price = price;}public String getSubtitle(){return subtitle;}public void setSubtitle(String subtitle){this.subtitle = subtitle;}public String getAlt(){return alt;}public void setAlt(String alt){this.alt = alt;}public Rating getRating(){return rating;}public void setRating(Rating rating){this.rating = rating;}public List<String> getAuthor(){return author;}public void setAuthor(List<String> author){this.author = author;}public String getAlt_title(){return alt_title;}public void setAlt_title(String alt_title){this.alt_title = alt_title;}public String getTitle(){return title;}public void setTitle(String title){this.title = title;}public String getMobile_link(){return mobile_link;}public void setMobile_link(String mobile_link){this.mobile_link = mobile_link;}public String getSummary(){return summary;}public void setSummary(String summary){this.summary = summary;}public Attrs getAttrs(){return attrs;}public void setAttrs(Attrs attrs){this.attrs = attrs;}public List<Tags> getTags(){return tags;}public void setTags(List<Tags> tags){this.tags = tags;}static private class Tags{private String count;private String name;private String title;public String getTitle(){return title;}public void setTitle(String title){this.title = title;}public String getCount(){return count;}public void setCount(String count){this.count = count;}public String getName(){return name;}public void setName(String name){this.name = name;}}static private class Attrs{private List<String> publiser;private List<String> pubdate;private List<String> author;private List<String> price;private List<String> title;private List<String> binding;private List<String> translator;private List<String> pages;public List<String> getPubliser(){return publiser;}public void setPubliser(List<String> publiser){this.publiser = publiser;}public List<String> getPubdate(){return pubdate;}public void setPubdate(List<String> pubdate){this.pubdate = pubdate;}public List<String> getAuthor(){return author;}public void setAuthor(List<String> author){this.author = author;}public List<String> getPrice(){return price;}public void setPrice(List<String> price){this.price = price;}public List<String> getTitle(){return title;}public void setTitle(List<String> title){this.title = title;}public List<String> getBinding(){return binding;}public void setBinding(List<String> binding){this.binding = binding;}public List<String> getTranslator(){return translator;}public void setTranslator(List<String> translator){this.translator = translator;}public List<String> getPages(){return pages;}public void setPages(List<String> pages){this.pages = pages;}}static class Rating{private int max;private String average;private int numRaters;private int min;public int getMax(){return max;}public void setMax(int max){this.max = max;}public String getAverage(){return average;}public void setAverage(String average){this.average = average;}public int getNumRaters(){return numRaters;}public void setNumRaters(int numRaters){this.numRaters = numRaters;}public int getMin(){return min;}public void setMin(int min){this.min = min;}}public String getPublisher(){return publisher;}public void setPublisher(String publisher){this.publisher = publisher;}}