本文整理了Java中com.fasterxml.jackson.databind.ObjectMapper.reader()方法的一些代码示例，展示了ObjectMapper.reader()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ObjectMapper.reader()方法的具体详情如下：
包路径：com.fasterxml.jackson.databind.ObjectMapper
类名称：ObjectMapper
方法名：reader

ObjectMapper.reader介绍

[英]Factory method for constructing ObjectReader with default settings. Note that the resulting instance is NOT usable as is, without defining expected value type.
[中]使用默认设置构造ObjectReader的工厂方法。请注意，如果不定义预期的值类型，结果实例将无法按原样使用。

代码示例

代码示例来源：origin: web3j/web3j

public static ObjectReader getObjectReader() {
  return DEFAULT_OBJECT_MAPPER.reader();
}

代码示例来源：origin: stagemonitor/stagemonitor

public static <T> ObjectReader getObjectReader(Class<T> type) {
  final ObjectReader objectReader;
  if (getMapper().version().compareTo(new Version(2, 6, 0, null, "com.fasterxml.jackson.core", "jackson-databind")) >= 0) {
    objectReader = getMapper().readerFor(type);
  } else {
    objectReader = getMapper().reader(type);
  }
  return objectReader;
}
private static class AfterburnerModuleRegisterer {

代码示例来源：origin: spotify/helios

public static ObjectReader reader() {
 return OBJECT_MAPPER.reader();
}

代码示例来源：origin: stackoverflow.com

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectReader;

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

ObjectReader objectReader = objectMapper.reader(MyMappingClass.class);
MyMappingClass myMappingClass = objectReader.readValue(json);

代码示例来源：origin: prestodb/presto

private boolean isAccumuloTable(byte[] data)
    throws IOException
{
  // AccumuloTable does not contain a 'data' node
  return !mapper.reader().readTree(new String(data)).has("data");
}

代码示例来源：origin: prestodb/presto

private boolean isAccumuloView(byte[] data)
    throws IOException
{
  // AccumuloView contains a 'data' node
  return mapper.reader().readTree(new String(data)).has("data");
}

代码示例来源：origin: json-path/JsonPath

/**
 * Initialize the JacksonProvider with a custom ObjectMapper.
 * @param objectMapper the ObjectMapper to use
 */
public JacksonJsonProvider(ObjectMapper objectMapper) {
 this(objectMapper, objectMapper.reader().withType(Object.class));
}

代码示例来源：origin: aws/aws-sdk-java

private Object getObjectFromPayload(Type type, ByteBuffer payload) throws IOException {
    if (type == void.class || payload.remaining() == 0) {
      return null;
    }
    JavaType javaType = mapper.getTypeFactory().constructType(type);
    return mapper.reader(javaType).readValue(BinaryUtils.copyAllBytesFrom(payload));
  }
}

代码示例来源：origin: auth0/java-jwt

private void addDeserializers(ObjectMapper mapper) {
  SimpleModule module = new SimpleModule();
  ObjectReader reader = mapper.reader();
  module.addDeserializer(Payload.class, new PayloadDeserializer(reader));
  module.addDeserializer(Header.class, new HeaderDeserializer(reader));
  mapper.registerModule(module);
}

代码示例来源：origin: spring-projects/spring-data-redis

@Override
public Object fromHash(Map<String, Object> hash) {
  try {
    if (flatten) {
      return typingMapper.reader().forType(Object.class)
          .readValue(untypedMapper.writeValueAsBytes(doUnflatten(hash)));
    }
    return typingMapper.treeToValue(untypedMapper.valueToTree(hash), Object.class);
  } catch (IOException e) {
    throw new MappingException(e.getMessage(), e);
  }
}

代码示例来源：origin: graphhopper/graphhopper

@Override
public void fillResponseFromJson(MatrixResponse matrixResponse, String responseAsString) throws IOException {
  fillResponseFromJson(matrixResponse, objectMapper.reader().readTree(responseAsString));
}

代码示例来源：origin: graphhopper/graphhopper

public void fillResponseFromJson(MatrixResponse matrixResponse, String responseAsString) throws IOException {
  fillResponseFromJson(matrixResponse, objectMapper.reader().readTree(responseAsString));
}

代码示例来源：origin: Netflix/eureka

public EurekaJacksonCodec(String versionDeltaKey, String appsHashCodeKey) {
  this.versionDeltaKey = versionDeltaKey;
  this.appHashCodeKey = appsHashCodeKey;
  this.mapper = new ObjectMapper();
  this.mapper.setSerializationInclusion(Include.NON_NULL);
  SimpleModule module = new SimpleModule("eureka1.x", VERSION);
  module.addSerializer(DataCenterInfo.class, new DataCenterInfoSerializer());
  module.addSerializer(InstanceInfo.class, new InstanceInfoSerializer());
  module.addSerializer(Application.class, new ApplicationSerializer());
  module.addSerializer(Applications.class, new ApplicationsSerializer(this.versionDeltaKey, this.appHashCodeKey));
  module.addDeserializer(LeaseInfo.class, new LeaseInfoDeserializer());
  module.addDeserializer(InstanceInfo.class, new InstanceInfoDeserializer(this.mapper));
  module.addDeserializer(Application.class, new ApplicationDeserializer(this.mapper));
  module.addDeserializer(Applications.class, new ApplicationsDeserializer(this.mapper, this.versionDeltaKey, this.appHashCodeKey));
  this.mapper.registerModule(module);
  Map<Class<?>, Supplier<ObjectReader>> readers = new HashMap<>();
  readers.put(InstanceInfo.class, ()->mapper.reader().forType(InstanceInfo.class).withRootName("instance"));
  readers.put(Application.class, ()->mapper.reader().forType(Application.class).withRootName("application"));
  readers.put(Applications.class, ()->mapper.reader().forType(Applications.class).withRootName("applications"));
  this.objectReaderByClass = readers;
  Map<Class<?>, ObjectWriter> writers = new HashMap<>();
  writers.put(InstanceInfo.class, mapper.writer().forType(InstanceInfo.class).withRootName("instance"));
  writers.put(Application.class, mapper.writer().forType(Application.class).withRootName("application"));
  writers.put(Applications.class, mapper.writer().forType(Applications.class).withRootName("applications"));
  this.objectWriterByClass = writers;
}

代码示例来源：origin: apache/nifi

/**
 * @param ipAddress IPv4 or IPv6 address to lookup.
 * @return An object of type T with the data for the IP address or null if no information could be found for the given IP address
 * @throws IOException if there is an error opening or reading from the file.
 */
private <T> T get(InetAddress ipAddress, Class<T> cls, boolean hasTraits, String type) throws IOException {
  String databaseType = this.getMetadata().getDatabaseType();
  if (!databaseType.contains(type)) {
    String caller = Thread.currentThread().getStackTrace()[2].getMethodName();
    throw new UnsupportedOperationException("Invalid attempt to open a " + databaseType + " database using the " + caller + " method");
  }
  ObjectNode node = (ObjectNode) this.reader.get(ipAddress);
  if (node == null) {
    return null;
  }
  InjectableValues inject = new JsonInjector(ipAddress.getHostAddress());
  return this.om.reader(inject).treeToValue(node, cls);
}

代码示例来源：origin: spring-projects/spring-framework

public Consumer<DataBuffer> pojoConsumer(Pojo expected) {
  return dataBuffer -> {
    try {
      Pojo actual = this.mapper.reader().forType(Pojo.class)
          .readValue(DataBufferTestUtils.dumpBytes(dataBuffer));
      assertEquals(expected, actual);
      release(dataBuffer);
    }
    catch (IOException ex) {
      throw new UncheckedIOException(ex);
    }
  };
}

代码示例来源：origin: spring-projects/spring-framework

private <T> Consumer<DataBuffer> expect(T expected, Class<T> expectedType) {
  return dataBuffer -> {
    try {
      Object actual = this.mapper.reader().forType(expectedType)
          .readValue(dataBuffer.asInputStream());
      assertEquals(expected, actual);
    }
    catch (IOException e) {
      throw new UncheckedIOException(e);
    }
    finally {
      release(dataBuffer);
    }
  };
}

代码示例来源：origin: auth0/java-jwt

@Before
public void setUp() throws Exception {
  deserializer = new PayloadDeserializer(new ObjectMapper().reader());
}

代码示例来源：origin: auth0/java-jwt

@Before
public void setUp() throws Exception {
  mapper = getDefaultObjectMapper();
  objectReader = mapper.reader();
  
  expiresAt = Mockito.mock(Date.class);
  notBefore = Mockito.mock(Date.class);
  issuedAt = Mockito.mock(Date.class);
  Map<String, JsonNode> tree = new HashMap<>();
  tree.put("extraClaim", new TextNode("extraValue"));
  payload = new PayloadImpl("issuer", "subject", Collections.singletonList("audience"), expiresAt, notBefore, issuedAt, "jwtId", tree, objectReader);
}

代码示例来源：origin: auth0/java-jwt

@Before
public void setUp() throws Exception {
  mapper = getDefaultObjectMapper();
  objectReader = mapper.reader();
}

代码示例来源：origin: Netflix/conductor

@Test
  public void testSimpleMapping() throws JsonGenerationException, JsonMappingException, IOException {
    ObjectMapper m = new JsonMapperProvider().get();
    assertTrue(m.canSerialize(Any.class));

    Struct struct1 = Struct.newBuilder().putFields(
        "some-key", Value.newBuilder().setStringValue("some-value").build()
    ).build();

    Any source = Any.pack(struct1);

    StringWriter buf = new StringWriter();
    m.writer().writeValue(buf, source);

    Any dest = m.reader().forType(Any.class).readValue(buf.toString());
    assertEquals(source.getTypeUrl(), dest.getTypeUrl());

    Struct struct2 = dest.unpack(Struct.class);
    assertTrue(struct2.containsFields("some-key"));
    assertEquals(
        struct1.getFieldsOrThrow("some-key").getStringValue(),
        struct2.getFieldsOrThrow("some-key").getStringValue()
    );
  }
}