ObjectMapper 抛出异常："no single-String constructor/factory method"，由于 "nillable" 属性？可以做什么？
ObjectMapper throws exception: "no single-String constructor/factory method", due to "nillable" attribute? What can be done?
我需要帮助 solve/fix 以下异常的原因...
即
Can not instantiate value of type [simple type, class javax.xml.bind.JAXBElement<javax.xml.datatype.XMLGregorianCalendar>]
from String value ('2018-02-04');
no single-String constructor/factory method
这是有问题的 json 字符串
即
{"MySubGroup":[{"MyDateTime":"2018-02-01T01:01:01.001-05:00","MyDate":"2018-02-04T01:01:01.001-05:00"}]}
导致解析失败的架构元素如下所示...
即
<xs:element name="MyDate" type="xs:date" minOccurs="0" nillable="true"/>
（请注意：如果我从 MyDate 架构元素中删除 "nillable" 属性，该示例将正常运行）
问题：
--How can I overcome this issue *without* removing this "nillable" attribute?
这是架构...
即
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema
targetNamespace="http://aaa.bbb.ccc"
attributeFormDefault="unqualified"
elementFormDefault="qualified"
xmlns:es="http://aaa.bbb.ccc"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:complexType name="MySubGroupType">
<xs:all>
<xs:element name="MyDateTime" type="xs:dateTime" minOccurs="0" />
<xs:element name="MyDate" type="xs:date" minOccurs="0" nillable="true"/>
</xs:all>
</xs:complexType>
<xs:element name="MyGroup">
<xs:complexType>
<xs:sequence>
<xs:element name="MySubGroup" type="es:MySubGroupType" minOccurs="0" maxOccurs="unbounded" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
这是有问题的代码...
即
String jsonString = "{\"MySubGroup\":[{\"MyDateTime\":\"2018-02-01T01:01:01.001-05:00\",\"MyDate\":\"2018-02-04\"}]}";
om = new ObjectMapper();
om.findAndRegisterModules();
om.setPropertyNamingStrategy(new PreservePropertyNameStrategy()); // (NOTE: PropertyNamingStrategy.UPPER_CASE is not available in jackson 2.6.3)
mg = om.readValue(jsonString, MyGroup.class);
MySubGroupType sgt = mg.getMySubGroup().get(0);
System.out.println("value of MyDate element is:" + sgt.getMyDate());
这条语句出现异常...
即
mg = om.readValue(jsonString, MyGroup.class);
如有需要，请在下方详细了解...
MyRoute.java...
即
package aaa.bbb.ccc.jar;
import aaa.bbb.ccc.generated.MyGroup;
import aaa.bbb.ccc.generated.MySubGroupType;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.cdi.ContextName;
@ContextName("rest-dsl")
public class MyRoutes extends RouteBuilder {
public MyRoutes() {
}
private ObjectMapper om = new ObjectMapper();
private MyGroup mg;
@Override
public void configure() throws Exception {
org.apache.log4j.MDC.put("app.name", "testjsonparse");
from("timer://foo?fixedRate=true&repeatCount=1")
.setBody(constant("placeholder"))
.to("seda:node1");
from("seda:node1")
.process(new Processor() {
@Override
public void process(Exchange exchange) {
try {
String jsonString = "{\"MySubGroup\":[{\"MyDateTime\":\"2018-02-01T01:01:01.001-05:00\",\"MyDate\":\"2018-02-04\"}]}";
om = new ObjectMapper();
om.findAndRegisterModules();
om.setPropertyNamingStrategy(new PreservePropertyNameStrategy()); //not available in jackson 2.6.3: PropertyNamingStrategy.UPPER_CASE);
mg = om.readValue(jsonString, MyGroup.class);
MySubGroupType sgt = mg.getMySubGroup().get(0);
exchange.getIn().setBody("+++success+++");
} catch (Exception e) {
e.printStackTrace();
exchange.getIn().setBody("---failure---");
}
}
})
.to("seda:node2");
from("seda:node2")
.log("\n\n... ${body}");
}
}
PreservePropertyNameStrategy.java...
即
package aaa.bbb.ccc.jar;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import com.fasterxml.jackson.databind.cfg.MapperConfig;
import com.fasterxml.jackson.databind.introspect.AnnotatedField;
import com.fasterxml.jackson.databind.introspect.AnnotatedMethod;
// the myschema.xml schema (for academic reasons) capitalizes the 1st letter of each property name...
//...we handle the issue by extending/customizing PropertyNamingStrategy - mainly because the option "PropertyNamingStrategy.UPPER_CASE" is not yet available in jackson 2.6.3 (?)...
public class PreservePropertyNameStrategy extends PropertyNamingStrategy {
@Override
public String nameForField(MapperConfig<?> config, AnnotatedField field, String defaultName) {
return Character.toUpperCase(field.getName().charAt(0)) + field.getName().substring(1);
}
@Override
public String nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
String m = method.getName();
return (m.startsWith("is")?m.substring(2):m.substring(3));
}
@Override
public String nameForSetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
return method.getName().substring(3);
}
}
MySubGroupType.java - 从模式生成...
即
package aaa.bbb.ccc.generated;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementRef;
import javax.xml.bind.annotation.XmlSchemaType;
import javax.xml.bind.annotation.XmlType;
import javax.xml.datatype.XMLGregorianCalendar;
/**
* <p>Java class for MySubGroupType complex type.
*
* <p>The following schema fragment specifies the expected content contained within this class.
*
* <pre>
* <complexType name="MySubGroupType">
* <complexContent>
* <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
* <all>
* <element name="MyDateTime" type="{http://www.w3.org/2001/XMLSchema}dateTime" minOccurs="0"/>
* <element name="MyDate" type="{http://www.w3.org/2001/XMLSchema}date" minOccurs="0"/>
* </all>
* </restriction>
* </complexContent>
* </complexType>
* </pre>
*
*
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "MySubGroupType", propOrder = {
})
public class MySubGroupType {
@XmlElement(name = "MyDateTime")
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar myDateTime;
@XmlElementRef(name = "MyDate", namespace = "http://aaa.bbb.ccc", type = JAXBElement.class, required = false)
protected JAXBElement<XMLGregorianCalendar> myDate;
/**
* Gets the value of the myDateTime property.
*
* @return
* possible object is
* {@link XMLGregorianCalendar }
*
*/
public XMLGregorianCalendar getMyDateTime() {
return myDateTime;
}
/**
* Sets the value of the myDateTime property.
*
* @param value
* allowed object is
* {@link XMLGregorianCalendar }
*
*/
public void setMyDateTime(XMLGregorianCalendar value) {
this.myDateTime = value;
}
/**
* Gets the value of the myDate property.
*
* @return
* possible object is
* {@link JAXBElement }{@code <}{@link XMLGregorianCalendar }{@code >}
*
*/
public JAXBElement<XMLGregorianCalendar> getMyDate() {
return myDate;
}
/**
* Sets the value of the myDate property.
*
* @param value
* allowed object is
* {@link JAXBElement }{@code <}{@link XMLGregorianCalendar }{@code >}
*
*/
public void setMyDate(JAXBElement<XMLGregorianCalendar> value) {
this.myDate = value;
}
}
MyGroup.java - 从模式生成...
即
//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v2.2.11
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a>
// Any modifications to this file will be lost upon recompilation of the source schema.
// Generated on: 2018.02.08 at 05:44:17 PM EST
//
package aaa.bbb.ccc.generated;
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
/**
* <p>Java class for anonymous complex type.
*
* <p>The following schema fragment specifies the expected content contained within this class.
*
* <pre>
* <complexType>
* <complexContent>
* <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
* <sequence>
* <element name="MySubGroup" type="{http://aaa.bbb.ccc}MySubGroupType" maxOccurs="unbounded" minOccurs="0"/>
* </sequence>
* </restriction>
* </complexContent>
* </complexType>
* </pre>
*
*
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
"mySubGroup"
})
@XmlRootElement(name = "MyGroup")
public class MyGroup {
@XmlElement(name = "MySubGroup")
protected List<MySubGroupType> mySubGroup;
/**
* Gets the value of the mySubGroup property.
*
* <p>
* This accessor method returns a reference to the live list,
* not a snapshot. Therefore any modification you make to the
* returned list will be present inside the JAXB object.
* This is why there is not a <CODE>set</CODE> method for the mySubGroup property.
*
* <p>
* For example, to add a new item, do as follows:
* <pre>
* getMySubGroup().add(newItem);
* </pre>
*
*
* <p>
* Objects of the following type(s) are allowed in the list
* {@link MySubGroupType }
*
*
*/
public List<MySubGroupType> getMySubGroup() {
if (mySubGroup == null) {
mySubGroup = new ArrayList<MySubGroupType>();
}
return this.mySubGroup;
}
}
这是pom.xml...
即
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>aaa.bbb.ccc</groupId>
<artifactId>testjsonissue</artifactId>
<version>1.0.0</version>
<packaging>bundle</packaging>
<name>testjsonissue</name>
<description>testjsonissue</description>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<skipTests>true</skipTests>
<mq.version>8.0.0.7</mq.version>
<timestamp>v${maven.build.timestamp}</timestamp>
<maven.build.timestamp.format>yyyyMMdd.HHmmss</maven.build.timestamp.format>
</properties>
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-core</artifactId>
<version>2.17.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-cdi</artifactId>
<version>2.17.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-jackson</artifactId>
<version>2.17.0</version>
<scope>provided</scope>
</dependency>
<!-- version to use, as per: https://mvnrepository.com/artifact/org.apache.camel/camel-jackson/2.17.0.redhat-630283 -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.6.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
<version>2.6.3</version>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}-${project.version}</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>jaxb2-maven-plugin</artifactId>
<version>2.3</version>
<executions>
<execution>
<id>xjc</id>
<goals>
<goal>xjc</goal>
</goals>
</execution>
</executions>
<configuration>
<sources>
<source>src/main/resources/xsd/myschema.xsd</source>
</sources>
<packageName>aaa.bbb.ccc.generated</packageName>
<verbose default-value="false">${xjc.verbose}</verbose>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>3.3.0</version>
<extensions>true</extensions>
<configuration>
<instructions>
<Bundle-SymbolicName>${project.groupId}.${project.artifactId}</Bundle-SymbolicName>
<Export-Package>aaa.bbb.ccc*</Export-Package>
<Bundle-Version>${project.version}-${timestamp}</Bundle-Version>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
</project>
**环境...我仅限于这些 dependencies/versions，等等 **
即
Java 8
Jboss Fuse, v6.3.0
camel-jackson, v2.17.0
jackson-databind, v2.6.3
jackson-datatype-jsr310, v2.6.3
显然，缺少以下说明...
om.registerModule(new JavaTimeModule());
...现在可以使用...
换句话说，这个
String jsonString = "{\"MySubGroup\":[{\"MyDateTime\":\"2018-02-01T01:01:01.001-05:00\",\"MyDate\":\"2018-02-04\"}]}";
om = new ObjectMapper();
om.findAndRegisterModules();
om.setPropertyNamingStrategy(new PreservePropertyNameStrategy()); //not available in jackson 2.6.3: PropertyNamingStrategy.UPPER_CASE);
mg = om.readValue(jsonString, MyGroup.class);
MySubGroupType sgt = mg.getMySubGroup().get(0);
exchange.getIn().setBody("+++success+++");
...改成这样...
String jsonString = "{\"MySubGroup\":[{\"MyDateTime\":\"2018-02-01T01:01:01.001-05:00\",\"MyDate\":\"2018-02-04\"}]}";
om = new ObjectMapper();
om.registerModule(new JavaTimeModule()); //<=== changed
om.setPropertyNamingStrategy(new PreservePropertyNameStrategy()); //not available in jackson 2.6.3: PropertyNamingStrategy.UPPER_CASE);
mg = om.readValue(jsonString, MyGroup.class);
MySubGroupType sgt = mg.getMySubGroup().get(0);
exchange.getIn().setBody("+++success+++");
我需要帮助 solve/fix 以下异常的原因...
即
Can not instantiate value of type [simple type, class javax.xml.bind.JAXBElement<javax.xml.datatype.XMLGregorianCalendar>]
from String value ('2018-02-04');
no single-String constructor/factory method
这是有问题的 json 字符串
即
{"MySubGroup":[{"MyDateTime":"2018-02-01T01:01:01.001-05:00","MyDate":"2018-02-04T01:01:01.001-05:00"}]}
导致解析失败的架构元素如下所示...
即
<xs:element name="MyDate" type="xs:date" minOccurs="0" nillable="true"/>
（请注意：如果我从 MyDate 架构元素中删除 "nillable" 属性，该示例将正常运行）
问题：
--How can I overcome this issue *without* removing this "nillable" attribute?
这是架构...
即
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema
targetNamespace="http://aaa.bbb.ccc"
attributeFormDefault="unqualified"
elementFormDefault="qualified"
xmlns:es="http://aaa.bbb.ccc"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:complexType name="MySubGroupType">
<xs:all>
<xs:element name="MyDateTime" type="xs:dateTime" minOccurs="0" />
<xs:element name="MyDate" type="xs:date" minOccurs="0" nillable="true"/>
</xs:all>
</xs:complexType>
<xs:element name="MyGroup">
<xs:complexType>
<xs:sequence>
<xs:element name="MySubGroup" type="es:MySubGroupType" minOccurs="0" maxOccurs="unbounded" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
这是有问题的代码...
即
String jsonString = "{\"MySubGroup\":[{\"MyDateTime\":\"2018-02-01T01:01:01.001-05:00\",\"MyDate\":\"2018-02-04\"}]}";
om = new ObjectMapper();
om.findAndRegisterModules();
om.setPropertyNamingStrategy(new PreservePropertyNameStrategy()); // (NOTE: PropertyNamingStrategy.UPPER_CASE is not available in jackson 2.6.3)
mg = om.readValue(jsonString, MyGroup.class);
MySubGroupType sgt = mg.getMySubGroup().get(0);
System.out.println("value of MyDate element is:" + sgt.getMyDate());
这条语句出现异常...
即
mg = om.readValue(jsonString, MyGroup.class);
如有需要，请在下方详细了解...
MyRoute.java...
即
package aaa.bbb.ccc.jar;
import aaa.bbb.ccc.generated.MyGroup;
import aaa.bbb.ccc.generated.MySubGroupType;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.cdi.ContextName;
@ContextName("rest-dsl")
public class MyRoutes extends RouteBuilder {
public MyRoutes() {
}
private ObjectMapper om = new ObjectMapper();
private MyGroup mg;
@Override
public void configure() throws Exception {
org.apache.log4j.MDC.put("app.name", "testjsonparse");
from("timer://foo?fixedRate=true&repeatCount=1")
.setBody(constant("placeholder"))
.to("seda:node1");
from("seda:node1")
.process(new Processor() {
@Override
public void process(Exchange exchange) {
try {
String jsonString = "{\"MySubGroup\":[{\"MyDateTime\":\"2018-02-01T01:01:01.001-05:00\",\"MyDate\":\"2018-02-04\"}]}";
om = new ObjectMapper();
om.findAndRegisterModules();
om.setPropertyNamingStrategy(new PreservePropertyNameStrategy()); //not available in jackson 2.6.3: PropertyNamingStrategy.UPPER_CASE);
mg = om.readValue(jsonString, MyGroup.class);
MySubGroupType sgt = mg.getMySubGroup().get(0);
exchange.getIn().setBody("+++success+++");
} catch (Exception e) {
e.printStackTrace();
exchange.getIn().setBody("---failure---");
}
}
})
.to("seda:node2");
from("seda:node2")
.log("\n\n... ${body}");
}
}
PreservePropertyNameStrategy.java...
即
package aaa.bbb.ccc.jar;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import com.fasterxml.jackson.databind.cfg.MapperConfig;
import com.fasterxml.jackson.databind.introspect.AnnotatedField;
import com.fasterxml.jackson.databind.introspect.AnnotatedMethod;
// the myschema.xml schema (for academic reasons) capitalizes the 1st letter of each property name...
//...we handle the issue by extending/customizing PropertyNamingStrategy - mainly because the option "PropertyNamingStrategy.UPPER_CASE" is not yet available in jackson 2.6.3 (?)...
public class PreservePropertyNameStrategy extends PropertyNamingStrategy {
@Override
public String nameForField(MapperConfig<?> config, AnnotatedField field, String defaultName) {
return Character.toUpperCase(field.getName().charAt(0)) + field.getName().substring(1);
}
@Override
public String nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
String m = method.getName();
return (m.startsWith("is")?m.substring(2):m.substring(3));
}
@Override
public String nameForSetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
return method.getName().substring(3);
}
}
MySubGroupType.java - 从模式生成...
即
package aaa.bbb.ccc.generated;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementRef;
import javax.xml.bind.annotation.XmlSchemaType;
import javax.xml.bind.annotation.XmlType;
import javax.xml.datatype.XMLGregorianCalendar;
/**
* <p>Java class for MySubGroupType complex type.
*
* <p>The following schema fragment specifies the expected content contained within this class.
*
* <pre>
* <complexType name="MySubGroupType">
* <complexContent>
* <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
* <all>
* <element name="MyDateTime" type="{http://www.w3.org/2001/XMLSchema}dateTime" minOccurs="0"/>
* <element name="MyDate" type="{http://www.w3.org/2001/XMLSchema}date" minOccurs="0"/>
* </all>
* </restriction>
* </complexContent>
* </complexType>
* </pre>
*
*
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "MySubGroupType", propOrder = {
})
public class MySubGroupType {
@XmlElement(name = "MyDateTime")
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar myDateTime;
@XmlElementRef(name = "MyDate", namespace = "http://aaa.bbb.ccc", type = JAXBElement.class, required = false)
protected JAXBElement<XMLGregorianCalendar> myDate;
/**
* Gets the value of the myDateTime property.
*
* @return
* possible object is
* {@link XMLGregorianCalendar }
*
*/
public XMLGregorianCalendar getMyDateTime() {
return myDateTime;
}
/**
* Sets the value of the myDateTime property.
*
* @param value
* allowed object is
* {@link XMLGregorianCalendar }
*
*/
public void setMyDateTime(XMLGregorianCalendar value) {
this.myDateTime = value;
}
/**
* Gets the value of the myDate property.
*
* @return
* possible object is
* {@link JAXBElement }{@code <}{@link XMLGregorianCalendar }{@code >}
*
*/
public JAXBElement<XMLGregorianCalendar> getMyDate() {
return myDate;
}
/**
* Sets the value of the myDate property.
*
* @param value
* allowed object is
* {@link JAXBElement }{@code <}{@link XMLGregorianCalendar }{@code >}
*
*/
public void setMyDate(JAXBElement<XMLGregorianCalendar> value) {
this.myDate = value;
}
}
MyGroup.java - 从模式生成...
即
//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v2.2.11
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a>
// Any modifications to this file will be lost upon recompilation of the source schema.
// Generated on: 2018.02.08 at 05:44:17 PM EST
//
package aaa.bbb.ccc.generated;
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
/**
* <p>Java class for anonymous complex type.
*
* <p>The following schema fragment specifies the expected content contained within this class.
*
* <pre>
* <complexType>
* <complexContent>
* <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
* <sequence>
* <element name="MySubGroup" type="{http://aaa.bbb.ccc}MySubGroupType" maxOccurs="unbounded" minOccurs="0"/>
* </sequence>
* </restriction>
* </complexContent>
* </complexType>
* </pre>
*
*
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
"mySubGroup"
})
@XmlRootElement(name = "MyGroup")
public class MyGroup {
@XmlElement(name = "MySubGroup")
protected List<MySubGroupType> mySubGroup;
/**
* Gets the value of the mySubGroup property.
*
* <p>
* This accessor method returns a reference to the live list,
* not a snapshot. Therefore any modification you make to the
* returned list will be present inside the JAXB object.
* This is why there is not a <CODE>set</CODE> method for the mySubGroup property.
*
* <p>
* For example, to add a new item, do as follows:
* <pre>
* getMySubGroup().add(newItem);
* </pre>
*
*
* <p>
* Objects of the following type(s) are allowed in the list
* {@link MySubGroupType }
*
*
*/
public List<MySubGroupType> getMySubGroup() {
if (mySubGroup == null) {
mySubGroup = new ArrayList<MySubGroupType>();
}
return this.mySubGroup;
}
}
这是pom.xml...
即
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>aaa.bbb.ccc</groupId>
<artifactId>testjsonissue</artifactId>
<version>1.0.0</version>
<packaging>bundle</packaging>
<name>testjsonissue</name>
<description>testjsonissue</description>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<skipTests>true</skipTests>
<mq.version>8.0.0.7</mq.version>
<timestamp>v${maven.build.timestamp}</timestamp>
<maven.build.timestamp.format>yyyyMMdd.HHmmss</maven.build.timestamp.format>
</properties>
<dependencies>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-core</artifactId>
<version>2.17.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-cdi</artifactId>
<version>2.17.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-jackson</artifactId>
<version>2.17.0</version>
<scope>provided</scope>
</dependency>
<!-- version to use, as per: https://mvnrepository.com/artifact/org.apache.camel/camel-jackson/2.17.0.redhat-630283 -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.6.3</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
<version>2.6.3</version>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}-${project.version}</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>jaxb2-maven-plugin</artifactId>
<version>2.3</version>
<executions>
<execution>
<id>xjc</id>
<goals>
<goal>xjc</goal>
</goals>
</execution>
</executions>
<configuration>
<sources>
<source>src/main/resources/xsd/myschema.xsd</source>
</sources>
<packageName>aaa.bbb.ccc.generated</packageName>
<verbose default-value="false">${xjc.verbose}</verbose>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<version>3.3.0</version>
<extensions>true</extensions>
<configuration>
<instructions>
<Bundle-SymbolicName>${project.groupId}.${project.artifactId}</Bundle-SymbolicName>
<Export-Package>aaa.bbb.ccc*</Export-Package>
<Bundle-Version>${project.version}-${timestamp}</Bundle-Version>
</instructions>
</configuration>
</plugin>
</plugins>
</build>
</project>
**环境...我仅限于这些 dependencies/versions，等等 **
即
Java 8
Jboss Fuse, v6.3.0
camel-jackson, v2.17.0
jackson-databind, v2.6.3
jackson-datatype-jsr310, v2.6.3
显然，缺少以下说明...
om.registerModule(new JavaTimeModule());
...现在可以使用...
换句话说，这个
String jsonString = "{\"MySubGroup\":[{\"MyDateTime\":\"2018-02-01T01:01:01.001-05:00\",\"MyDate\":\"2018-02-04\"}]}";
om = new ObjectMapper();
om.findAndRegisterModules();
om.setPropertyNamingStrategy(new PreservePropertyNameStrategy()); //not available in jackson 2.6.3: PropertyNamingStrategy.UPPER_CASE);
mg = om.readValue(jsonString, MyGroup.class);
MySubGroupType sgt = mg.getMySubGroup().get(0);
exchange.getIn().setBody("+++success+++");
...改成这样...
String jsonString = "{\"MySubGroup\":[{\"MyDateTime\":\"2018-02-01T01:01:01.001-05:00\",\"MyDate\":\"2018-02-04\"}]}";
om = new ObjectMapper();
om.registerModule(new JavaTimeModule()); //<=== changed
om.setPropertyNamingStrategy(new PreservePropertyNameStrategy()); //not available in jackson 2.6.3: PropertyNamingStrategy.UPPER_CASE);
mg = om.readValue(jsonString, MyGroup.class);
MySubGroupType sgt = mg.getMySubGroup().get(0);
exchange.getIn().setBody("+++success+++");