java 如何修复 START_ARRAY 令牌错误
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How to fix Out of START_ARRAY token Error
提问by dummyDroid
Can anybody say where I am doing wrong. I have json like that
谁能说我哪里做错了。我有这样的 json
[{"name":"foo","slug":"foo2","locales":["foo3"],"hostname":"foo4","region_tag":"foo5"},{"name":"foo","slug":"foo2","locales":["foo3"],"hostname":"foo4","region_tag":"foo5"},{"name":"foo","slug":"foo2","locales":["foo3"],"hostname":"foo4","region_tag":"foo5"},{"name":"foo","slug":"foo2","locales":["foo3"],"hostname":"foo4","region_tag":"foo5"}]
And I parse to this class.
我解析到这个类。
@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL)
@JsonPropertyOrder({
"shards"
})
public class ShardsResponse extends Response{
@JsonProperty("shards")
private List<Shards> shards = new ArrayList<Shards>();
/**
*
* @return
* The shards
*/
@JsonProperty("shards")
public List<Shards> getShards() {
return shards;
}
/**
*
* @param shards
* The shards
*/
@JsonProperty("shards")
public void setShards(List<Shards> shards) {
this.shards = shards;
}
}
And Shards class is :
Shards 类是：
/**
*
* @return
* The locales
*/
@JsonProperty("locales")
public List<String> getLocales() {
return locales;
}
/**
*
* @param locales
* The locales
*/
@JsonProperty("locales")
public void setLocales(List<String> locales) {
this.locales = locales;
}
/**
*
* @return
* The name
*/
@JsonProperty("name")
public String getName() {
return name;
}
/**
*
* @param name
* The name
*/
@JsonProperty("name")
public void setName(String name) {
this.name = name;
}
/**
*
* @return
* The hostname
*/
@JsonProperty("hostname")
public String getHostname() {
return hostname;
}
/**
*
* @param hostname
* The hostname
*/
@JsonProperty("hostname")
public void setHostname(String hostname) {
this.hostname = hostname;
}
/**
*
* @return
* The slug
*/
@JsonProperty("slug")
public String getSlug() {
return slug;
}
/**
*
* @param slug
* The slug
*/
@JsonProperty("slug")
public void setSlug(String slug) {
this.slug = slug;
}
}
So I'm using ObjectMapper.readValue(jsontext, responseclass)
所以我正在使用 ObjectMapper.readValue(jsontext, responseclass)
JSONObject object = new JSONObject(JsonString);
JsonString = "";
Iterator<String> keys= object.keys();
while (keys.hasNext()){
String keyValue = (String)keys.next();
JsonString= JsonString+ object.getString(keyValue);
}
JsonString= JsonString.substring(1, JsonString.length()-1);
Object response = ObjectMapper.readValue(JsonString, ShardsResponse.class);
At the last I am getting out of START_ARRAY token. Please anybody tell me what's wrong.
最后我得到了out of START_ARRAY token。请任何人告诉我出了什么问题。
Cause I'm trying so much things, but I never find the solution.
因为我尝试了很多事情，但我从来没有找到解决办法。
How can I fix it.
我该如何解决。
回答by Gary Bak
Your json string is correct, but not for the object you expect, as someone mentioned already, you need to use a List
您的 json 字符串是正确的，但不适用于您期望的对象，正如有人已经提到的，您需要使用 List
import java.io.IOException;
import java.util.List;
import org.codehaus.Hymanson.map.ObjectMapper;
import org.codehaus.Hymanson.type.TypeReference;
public class ParseJson {
private static final String jsonString = "[{\"name\":\"foo\",\"slug\":\"foo2\",\"locales\":[\"foo3\"],\"hostname\":\"foo4\",\"region_tag\":\"foo5\"},{\"name\":\"foo\",\"slug\":\"foo2\",\"locales\":[\"foo3\"],\"hostname\":\"foo4\",\"region_tag\":\"foo5\"},{\"name\":\"foo\",\"slug\":\"foo2\",\"locales\":[\"foo3\"],\"hostname\":\"foo4\",\"region_tag\":\"foo5\"},{\"name\":\"foo\",\"slug\":\"foo2\",\"locales\":[\"foo3\"],\"hostname\":\"foo4\",\"region_tag\":\"foo5\"}]";
public static void parse() {
try {
TypeReference<List<Shards>> typeRef = new TypeReference<List<Shards>>() { };
ObjectMapper mapper = new ObjectMapper();
List<Shards> list = mapper.readValue(jsonString, typeRef);
for ( Shards s : list )
{
s.printDebug();
}
ShardsResponse sr = new ShardsResponse(list);
String srString = mapper.writeValueAsString(sr);
System.out.println("srString: " + srString );
TypeReference<ShardsResponse> typeRef2 = new TypeReference<ShardsResponse>() { };
ShardsResponse sr2 = mapper.readValue(srString, typeRef2);
sr2.printDebug();
} catch ( IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
ParseJson.parse();
}
}
Edit: If you expect a ShardsResponse back, your json string should look like this:
编辑：如果您希望 ShardsResponse 返回，您的 json 字符串应如下所示：
{"shards":[{"locales":["foo3"],"name":"foo","hostname":"foo4","slug":"foo2","region_tag":"foo5"},{"locales":["foo3"],"name":"foo","hostname":"foo4","slug":"foo2","region_tag":"foo5"},{"locales":["foo3"],"name":"foo","hostname":"foo4","slug":"foo2","region_tag":"foo5"},{"locales":["foo3"],"name":"foo","hostname":"foo4","slug":"foo2","region_tag":"foo5"}]}
Easiest way to figure out what the json will look like is to dump it out:
弄清楚 json 是什么样子的最简单方法是将其转储出来：
ShardsResponse sr = new ShardsResponse(list);
String srString = mapper.writeValueAsString(sr);
System.out.println("srString: " + srString );
Edit:
编辑：
Adding additional Classes for clarity:
为清楚起见，添加额外的类：
ShardsResponses.java
分片响应.java
import java.util.ArrayList;
import java.util.List;
public class ShardsResponse {
private List<Shards> shards = new ArrayList<Shards>();
public ShardsResponse() { }
public ShardsResponse( List<Shards> shards)
{
this.shards = shards;
}
public List<Shards> getShards() {
return shards;
}
public void setShards(List<Shards> shards) {
this.shards = shards;
}
public void printDebug()
{
for ( Shards s : shards)
{
s.printDebug();
System.out.println("");
}
}
}
Shards.java:
分片.java：
import java.util.List;
public class Shards {
private List<String> locales;
private String name;
private String hostname;
private String slug;
private String region_tag;
public List<String> getLocales() {
return locales;
}
public void setLocales(List<String> locales) {
this.locales = locales;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getHostname() {
return hostname;
}
public void setHostname(String hostname) {
this.hostname = hostname;
}
public String getSlug() {
return slug;
}
public void setSlug(String slug) {
this.slug = slug;
}
public void printDebug()
{
System.out.println("name: " + name);
System.out.println("hostname: " + hostname);
System.out.println("slug: " + slug);
System.out.println("region_tag: " + region_tag);
for ( String s : locales )
{
System.out.println("Locals: " + locales);
}
}
public String getRegion_tag() {
return region_tag;
}
public void setRegion_tag(String region_tag) {
this.region_tag = region_tag;
}
}
回答by Mohammad Rahchamani
you have an jsonArraybut you are trying to parse a jsonObject. change your method to return a list of objects instead of one object.
你有一个，jsonArray但你正试图解析一个jsonObject. 更改您的方法以返回对象列表而不是一个对象。
