Java+;JSON和;errorjava.lang.RuntimeException:存根&引用;错误
我创建了一个java控制台应用程序,但我不知道为什么它会返回一个错误“Stub!”。 这是我的代码:Java+;JSON和;errorjava.lang.RuntimeException:存根&引用;错误,java,json,stub,Java,Json,Stub,我创建了一个java控制台应用程序,但我不知道为什么它会返回一个错误“Stub!”。 这是我的代码: import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; public class HelloWorld { public static void main(String[] args) { JSONObject jsonObject = null;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class HelloWorld {
public static void main(String[] args) {
JSONObject jsonObject = null;
try {
JSONArray jsonArray = new JSONArray("{0:0}");
jsonObject = jsonArray.getJSONObject(0);
}
catch (Exception e) {
System.out.println("error" + e);
}
}
}
它返回给我:
errorjava.lang.RuntimeException: Stub!
如何在java中将JSON对象“{0:0}”更改为对象(数组)?Jackson库解决了我的问题(谢谢@fge)。 这是一个工作示例:
import java.io.File;
import java.io.IOException;
import org.codehaus.jackson.JsonEncoding;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;
class User {
public enum Gender { MALE, FEMALE };
public static class Name {
private String _first, _last;
public String getFirst() { return _first; }
public String getLast() { return _last; }
public void setFirst(String s) { _first = s; }
public void setLast(String s) { _last = s; }
}
private Gender _gender;
private Name _name;
private boolean _isVerified;
private byte[] _userImage;
public Name getName() { return _name; }
public boolean isVerified() { return _isVerified; }
public Gender getGender() { return _gender; }
public byte[] getUserImage() { return _userImage; }
public void setName(Name n) { _name = n; }
public void setVerified(boolean b) { _isVerified = b; }
public void setGender(Gender g) { _gender = g; }
public void setUserImage(byte[] b) { _userImage = b; }
}
public class HelloWorld {
public static void main(String[] args) {
ObjectMapper mapper = new ObjectMapper(); // can reuse, share globally
try {
User user = mapper.readValue("{\"name\":{ \"first\" : \"Joe\", \"last\" : \"Sixpack\" }}", User.class);
System.out.println(user.getName().getFirst());
} catch (JsonParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JsonMappingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
它返回“Joe”杰克逊图书馆解决了我的问题(谢谢@fge)。 这是一个工作示例:
import java.io.File;
import java.io.IOException;
import org.codehaus.jackson.JsonEncoding;
import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonGenerationException;
import org.codehaus.jackson.JsonGenerator;
import org.codehaus.jackson.JsonParseException;
import org.codehaus.jackson.map.JsonMappingException;
import org.codehaus.jackson.map.ObjectMapper;
class User {
public enum Gender { MALE, FEMALE };
public static class Name {
private String _first, _last;
public String getFirst() { return _first; }
public String getLast() { return _last; }
public void setFirst(String s) { _first = s; }
public void setLast(String s) { _last = s; }
}
private Gender _gender;
private Name _name;
private boolean _isVerified;
private byte[] _userImage;
public Name getName() { return _name; }
public boolean isVerified() { return _isVerified; }
public Gender getGender() { return _gender; }
public byte[] getUserImage() { return _userImage; }
public void setName(Name n) { _name = n; }
public void setVerified(boolean b) { _isVerified = b; }
public void setGender(Gender g) { _gender = g; }
public void setUserImage(byte[] b) { _userImage = b; }
}
public class HelloWorld {
public static void main(String[] args) {
ObjectMapper mapper = new ObjectMapper(); // can reuse, share globally
try {
User user = mapper.readValue("{\"name\":{ \"first\" : \"Joe\", \"last\" : \"Sixpack\" }}", User.class);
System.out.println(user.getName().getFirst());
} catch (JsonParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JsonMappingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
它返回“Joe”您的基本JSON是非法的,属性应该用双引号括起来:
{“0”:0}
但是如何转义引号呢<代码>JSONArray JSONArray=新JSONArray(“{\“0\”:0}”);jsonObject=jsonArray.getJSONObject(0)代码>返回:errorjava.lang.RuntimeException:存根!您希望您的阵列是什么<代码>[0],我想是的。我只是想用JSON对象(例如:{“foo”:“bar”})接收字符串,然后用Java将其“解码”为对象。您考虑过使用Jackson吗?这是为此类作业完成的。您的基本JSON是非法的,属性应该用双引号括起来:{“0”:0}
但是如何转义引号呢<代码>JSONArray JSONArray=新JSONArray(“{\“0\”:0}”);jsonObject=jsonArray.getJSONObject(0)代码>返回:errorjava.lang.RuntimeException:存根!您希望您的阵列是什么<代码>[0],我想是的。我只是想用JSON对象(例如:{“foo”:“bar”})接收字符串,然后用Java将其“解码”为对象。您考虑过使用Jackson吗?这是为这种工作做的