我正在使用杰克逊框架在 JSON 和 Java 之间编组和解组数据。一切正常，只要输入不包含任何字符，例如：
- ö
- 一个
- ü
- Ö
- 一个
- ü
- ß
对于我尝试的输入数据：
String jsonData = "{\"id\":1,\"street\":\"Straße\",\"number\":\"1c\",\"zipCode\":1111,\"city\":\"MyCity\"}";
也：
String jsonData = "{\"id\":1,\"street\":\"Stra\u00DFe\",\"number\":\"1c\",\"zipCode\":1111,\"city\":\"MyCity\"}";
而且我总是遇到同样的例外。
从 json 数据到 java 实体对象的映射通过以下方式完成：
/*
* Convert stream to data entity
*/
ObjectMapper m = new ObjectMapper();
T entity = (T) m.readValue(stringToStream(jsonData), readableClass);
我还执行了一个 json 数据验证，它的工作方式与预期一样，也使用上述字符。
应该如何处理这些数据？
更新MessageBodyReader这些是课程
的重要部分
@Override
public T readFrom(Class<T> type, Type genericType,
Annotation[] annotations, MediaType mediaType,
MultivaluedMap<String, String> httpHeaders, InputStream entityStream)
throws IOException, WebApplicationException {
final String jsonData = getStringFromInputStream(entityStream);
System.out.println(jsonData);
InputStream isSchema = new FileInputStream(jsonSchemaFile);
String jsonSchema = getStringFromInputStream(isSchema);
/*
* Perform JSON data validation against schema
*/
validateJsonData(jsonSchema, jsonData);
/*
* Convert stream to data entity
*/
ObjectMapper m = new ObjectMapper();
T entity = (T) m.readValue(stringToStream(jsonData), readableClass);
return entity;
}
/**
* Validate the given JSON data against the given JSON schema
*
* @param jsonSchema
* as String
* @param jsonData
* as String
* @throws MessageBodyReaderValidationException
* in case of an error during validation process
*/
private void validateJsonData(final String jsonSchema, final String jsonData)
throws MessageBodyReaderValidationException {
try {
final JsonNode d = JsonLoader.fromString(jsonData);
final JsonNode s = JsonLoader.fromString(jsonSchema);
final JsonSchemaFactory factory = JsonSchemaFactory.byDefault();
JsonValidator v = factory.getValidator();
ProcessingReport report = v.validate(s, d);
System.out.println(report);
if (!report.toString().contains("success")) {
throw new MessageBodyReaderValidationException(
report.toString());
}
} catch (IOException e) {
throw new MessageBodyReaderValidationException(
"Failed to validate json data", e);
} catch (ProcessingException e) {
throw new MessageBodyReaderValidationException(
"Failed to validate json data", e);
}
}
/**
* Taken from <a href=
* "http://www.mkyong.com/java/how-to-convert-inputstream-to-string-in-java/"
* >www.mkyong.com</a>
*
* @param is
* {@link InputStream}
* @return Stream content as String
*/
private String getStringFromInputStream(InputStream is) {
BufferedReader br = null;
StringBuilder sb = new StringBuilder();
String line;
try {
br = new BufferedReader(new InputStreamReader(is));
while ((line = br.readLine()) != null) {
sb.append(line);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return sb.toString();
}
private InputStream stringToStream(final String str) {
return new ByteArrayInputStream(str.getBytes());
}