如果一个字符串中包含JSON对象,我想将其序列化为JSON。为此,我编写了一个自定义的序列化器:
public class TryJsonStringSerializer extends JsonSerializer<String> {
@Override
public void serialize(String value, JsonGenerator jsonGenerator, SerializerProvider serializerProvider)
throws IOException, JsonProcessingException {
if (value == null) {
return;
}
value = value.trim();
if (value.startsWith("{") && value.endsWith("}")) {
jsonGenerator.writeRaw(value);
} else {
jsonGenerator.writeString(value);
}
}
}
但是我遇到了以下错误:
org.codehaus.jackson.JsonGenerationException: Can not write a field name, expecting a value
org.codehaus.jackson.impl.JsonGeneratorBase._reportError(JsonGeneratorBase.java:480)
org.codehaus.jackson.impl.Utf8Generator.writeFieldName(Utf8Generator.java:292)
org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:422)
org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
org.codehaus.jackson.map.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:446)
org.codehaus.jackson.map.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:150)
org.codehaus.jackson.map.ser.BeanSerializer.serialize(BeanSerializer.java:112)
org.codehaus.jackson.map.ser.std.StdContainerSerializers$IndexedListSerializer.serializeContents(StdContainerSerializers.java:122)
org.codehaus.jackson.map.ser.std.StdContainerSerializers$IndexedListSerializer.serializeContents(StdContainerSerializers.java:71)
org.codehaus.jackson.map.ser.std.AsArraySerializerBase.serialize(AsArraySerializerBase.java:86)
org.codehaus.jackson.map.ser.StdSerializerProvider._serializeValue(StdSerializerProvider.java:610)
org.codehaus.jackson.map.ser.StdSerializerProvider.serializeValue(StdSerializerProvider.java:256)
org.codehaus.jackson.map.ObjectMapper.writeValue(ObjectMapper.java:1613)
...
什么是达成此目标的最佳方式?
jsonGenerator.writeString(value);
而不是jsonGenerator.writeRaw(value);
,一切都能工作。 - Adrian Ber