当尝试使用Jackson序列化一个非常简单的对象时,我遇到了异常。 错误信息如下:
org.codehaus.jackson.map.JsonMappingException: No serializer found for class MyPackage.TestA and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS))
下面是需要序列化的简单类和代码。
有谁能告诉我为什么会出现这个错误?
public class TestA {
String SomeString = "asd";
}
TestA testA = new TestA();
ObjectMapper om = new ObjectMapper();
try {
String testAString = om.writeValueAsString(testA); // error here!
TestA newTestA = om.readValue(testAString, TestA.class);
} catch (JsonGenerationException 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();
}