Impossibile deserializzare l'istanza di java.lang.String dal token START_ARRAY

Question

Sono molto nuovo per il parser Jackson. Il mio codice funzionava bene fino ad oggi. Non sono in grado di capire l'errore.

Exception in thread "main" com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_ARRAY token 
at [Source: line: 1, column: 1095] (through reference chain: JsonGen["platforms"]) 
at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:163) 
at com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:588) 
at com.fasterxml.jackson.databind.deser.std.JdkDeserializers$StringDeserializer.deserialize(JdkDeserializers.java:90) 
at com.fasterxml.jackson.databind.deser.std.JdkDeserializers$StringDeserializer.deserialize(JdkDeserializers.java:59) 
at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:336) 
at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:89) 
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:290) 
at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:112) 
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:226) 
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:203) 
at com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:23) 
at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2563) 
at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:1789) 
at BossMan.candie(BossMan.java:49) 
at Hilda.main(Hilda.java:81) 

Ecco il codice per le chiamate URL e l'oggetto mapper:

public class BossMan { 
public String[] candie() throws JsonParseException, JsonMappingException, IOException 
    { 
    URL jsonUrl = new URL("http://www.dishanywhere.com/radish/v20/dol/home/carousels/shows.json"); 

    ObjectMapper objmapper = new ObjectMapper(); 
    List<JsonGen> jsongen = objmapper.readValue(jsonUrl, new TypeReference<List<JsonGen>>() {}); 
     String[] shows = new String [jsongen.size()]; 
     int i = 0; 
    for(JsonGen element : jsongen) { 
     shows[i++]=element.getName(); 
    } 
    return shows; 
    } 
} 

Ecco la classe POJO:

import java.util.List; 

public class JsonGen{ 
    private String _type; 
    private List cast; 
    private List clips; 
    private Common_sense_data common_sense_data; 
    private String common_sense_id; 
    private List crew; 
    private String description; 
    private List episodes; 
    private Number franchise_id; 
    private List genres; 
    private String guid; 
    private Images images; 
    private boolean is_locked; 
    private boolean is_mobile; 
    private boolean is_parental_locked; 
    private String kind; 
    private String mobile_networks; 
    private String most_recent_full_episode_added_date; 
    private String name; 
    private List networks; 
    private String platforms; 
    private List ratings; 
    private String release_date; 
    private List season_filters; 
    private String slug; 
    private String tms_id; 

    public String get_type(){ 
    return this._type; 
    } 
    public void set_type(String _type){ 
    this._type = _type; 
    } 
    public List getCast(){ 
    return this.cast; 
    } 
    public void setCast(List cast){ 
    this.cast = cast; 
    } 
    public List getClips(){ 
    return this.clips; 
    } 
    public void setClips(List clips){ 
    this.clips = clips; 
    } 
    public Common_sense_data getCommon_sense_data(){ 
    return this.common_sense_data; 
    } 
    public void setCommon_sense_data(Common_sense_data common_sense_data){ 
    this.common_sense_data = common_sense_data; 
    } 
    public String getCommon_sense_id(){ 
    return this.common_sense_id; 
    } 
    public void setCommon_sense_id(String common_sense_id){ 
    this.common_sense_id = common_sense_id; 
    } 
    public List getCrew(){ 
    return this.crew; 
    } 
    public void setCrew(List crew){ 
    this.crew = crew; 
    } 
    public String getDescription(){ 
    return this.description; 
    } 
    public void setDescription(String description){ 
    this.description = description; 
    } 
    public List getEpisodes(){ 
    return this.episodes; 
    } 
    public void setEpisodes(List episodes){ 
    this.episodes = episodes; 
    } 
    public Number getFranchise_id(){ 
    return this.franchise_id; 
    } 
    public void setFranchise_id(Number franchise_id){ 
    this.franchise_id = franchise_id; 
    } 
    public List getGenres(){ 
    return this.genres; 
    } 
    public void setGenres(List genres){ 
    this.genres = genres; 
    } 
    public String getGuid(){ 
    return this.guid; 
    } 
    public void setGuid(String guid){ 
    this.guid = guid; 
    } 
    public Images getImages(){ 
    return this.images; 
    } 
    public void setImages(Images images){ 
    this.images = images; 
    } 
    public boolean getIs_locked(){ 
    return this.is_locked; 
    } 
    public void setIs_locked(boolean is_locked){ 
    this.is_locked = is_locked; 
    } 
    public boolean getIs_mobile(){ 
    return this.is_mobile; 
    } 
    public void setIs_mobile(boolean is_mobile){ 
    this.is_mobile = is_mobile; 
    } 
    public boolean getIs_parental_locked(){ 
    return this.is_parental_locked; 
    } 
    public void setIs_parental_locked(boolean is_parental_locked){ 
    this.is_parental_locked = is_parental_locked; 
    } 
    public String getKind(){ 
    return this.kind; 
    } 
    public void setKind(String kind){ 
    this.kind = kind; 
    } 
    public String getMobile_networks(){ 
    return this.mobile_networks; 
    } 
    public void setMobile_networks(String mobile_networks){ 
    this.mobile_networks = mobile_networks; 
    } 
    public String getMost_recent_full_episode_added_date(){ 
    return this.most_recent_full_episode_added_date; 
    } 
    public void setMost_recent_full_episode_added_date(String most_recent_full_episode_added_date){ 
    this.most_recent_full_episode_added_date = most_recent_full_episode_added_date; 
    } 
    public String getName(){ 
    return this.name; 
    } 
    public void setName(String name){ 
    this.name = name; 
    } 
    public List getNetworks(){ 
    return this.networks; 
    } 
    public void setNetworks(List networks){ 
    this.networks = networks; 
    } 
    public String getPlatforms(){ 
    return this.platforms; 
    } 
    public void setPlatforms(String platforms){ 
    this.platforms = platforms; 
    } 
    public List getRatings(){ 
    return this.ratings; 
    } 
    public void setRatings(List ratings){ 
    this.ratings = ratings; 
    } 
    public String getRelease_date(){ 
    return this.release_date; 
    } 
    public void setRelease_date(String release_date){ 
    this.release_date = release_date; 
    } 
    public List getSeason_filters(){ 
    return this.season_filters; 
    } 
    public void setSeason_filters(List season_filters){ 
    this.season_filters = season_filters; 
    } 
    public String getSlug(){ 
    return this.slug; 
    } 
    public void setSlug(String slug){ 
    this.slug = slug; 
    } 
    public String getTms_id(){ 
    return this.tms_id; 
    } 
    public void setTms_id(String tms_id){ 
    this.tms_id = tms_id; 
    } 
} 

Qui è la funzione principale:

public class Hilda { 
public static boolean b ; 
public static WebDriver driver; 
public static int countingCrows(WebDriver driver) throws InterruptedException{ 
    int i,j=0,k=0; 
    for(i=1; i<=2; i++){ 
    for(j=1; j<=6; j++){ 
     if(!(i==1&&j==6)){ 
     b = driver.findElement(By.xpath("//div[2]/div[5]/div[3]/div/div/div/div[1]/div/div[2]/div[2]/div/div["+i+"]/ul/li["+j+"]/div/a/img")).isEnabled(); 
     k++; 
     //System.out.println("k inner loop:"+k); 
     } 
     if(i==1&&j==5){ 
     Thread.sleep(5000); 
     try{ 
      boolean c = driver.findElement(By.xpath("//div[2]/div[5]/div[3]/div/div/div/div[1]/div/div[2]/div[2]/div/div[1]/ul/li[6]/div/a/img")).isEnabled(); 
      if(c){ 
      k++; 
      //System.err.println("k inside j==5 for sixsth element:"+k); 
      } 
     }catch (Exception e) { 
      System.err.println("sixsth elemnet not found in first row"); 
     } 
     } 
    } 
    if(i==1&&j==5){ 
     Thread.sleep(5000); 
     driver.findElement(By.xpath("//*[@class='carousel-control left']")).click(); 
    } 
    } 
    System.out.println("total no :"+k); 
    return k; 
} 

public static String[] unchained(WebDriver driver) throws InterruptedException{ 
    Thread.sleep(5000); 
    int j = countingCrows(driver); 
    int i,k=0; 
    String[] singleText1 = new String[11]; 
    if(j==11){ 
    for(i=1; i<=2; i++){ 
    for(j=1; j<=6; j++){ 
     if(!(i==1&&j==6)){ 
     singleText1[k] = driver.findElement(By.xpath("//div[2]/div[5]/div[3]/div/div/div/div[1]/div/div[2]/div[2]/div/div["+i+"]/ul/li["+j+"]/div/a/img")).getAttribute("id"); 
     //boolean b = driver.findElement(By.xpath("//div[2]/div[5]/div[3]/div/div/div/div[1]/div/div[2]/div[2]/div/div["+i+"]/ul/li["+j+"]/div/a/img")).isEnabled(); 
     //System.out.print(j-1+"-"+singleText1[k]); System.out.println("-"+b); 
     k++; 
     }else { 
     System.err.println("element div[1] div[6] is not present"); 
     } 
    } 
    if(j==5){ 
     Thread.sleep(5000); 
     driver.findElement(By.xpath("//*[@class='carousel-control left']")).click(); 
     } 
    } 
    } 
    return singleText1; 
} 

public static void main(String[] args) throws InterruptedException, JsonParseException, JsonMappingException, IOException { 
    WebDriver driver = new SafariDriver(); 
    driver.get("http://www.dishanywhere.com"); 
    Thread.sleep(5000); 
    String [] cottonSack =unchained(driver); 
    System.out.println("*******************************************************"); 
    int j = countingCrows(driver); 
    /*for(int i= 0;i<=j-1;i++){ 
    System.out.println(cottonSack[i]); 
    }*/ 

    BossMan calvin = new BossMan(); 
    String[] dogs = calvin.candie(); 
    for(int k=0;k<cottonSack.length;k++){ 
     boolean c = dogs[k].equalsIgnoreCase(cottonSack[k]); 
     if(c){ 
     System.out.println("Comparing json data- " +dogs[k]+" with webpage data- "+cottonSack[k]+" and Result is- "+c); 
     }else { 
     System.out.println("Comparing json data- " +dogs[k]+" with webpage data- "+cottonSack[k]+" Result- "+c); 
     } 
    } 
    } 
} 

Answer 1

L'errore è:

Non può deserializzare istanza di java.lang.String su START_ARRAY gettone a [fonte: riga: 1, colonna: 1095] (attraverso la catena di riferimento: JsonGen [ "piattaforme"])

in JSON, platforms simile a questa:

"platforms": [ 
    { 
     "platform": "iphone" 
    }, 
    { 
     "platform": "ipad" 
    }, 
    { 
     "platform": "android_phone" 
    }, 
    { 
     "platform": "android_tablet" 
    } 
] 

Quindi cercate cambiare il POJO a qualcosa di simile:

private List platforms; 

public List getPlatforms(){ 
    return this.platforms; 
} 

public void setPlatforms(List platforms){ 
    this.platforms = platforms; 
} 

EDIT: è necessario cambiare mobile_networks troppo. Sarà simile a questa:

private List mobile_networks; 

public List getMobile_networks() { 
    return mobile_networks; 
} 

public void setMobile_networks(List mobile_networks) { 
    this.mobile_networks = mobile_networks; 
}