Question

我正在使用HATEOS和spring数据mongo！尝试获取数据时出错 -

2017-01-23 13:31:43.859  INFO 13108 --- [nio-8080-exec-1] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:2, serverValue:9179}] to hkl101632.hk.hsbc:5255
2017-01-23 13:31:44.672 ERROR 13108 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.data.mapping.model.MappingInstantiationException: Failed to instantiate javax.xml.datatype.XMLGregorianCalendar using constructor public javax.xml.datatype.XMLGregorianCalendar() with arguments ] with root cause

java.lang.InstantiationException: null
    at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48) ~[na:1.8.0_66]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422) ~[na:1.8.0_66]
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:142) ~[spring-beans-4.3.5.RELEASE.jar:4.3.5.RELEASE]
    at org.springframework.data.convert.ReflectionEntityInstantiator.createInstance(ReflectionEntityInstantiator.java:76) ~[spring-data-commons-1.12.6.RELEASE.jar:na]
    at org.springframework.data.convert.ClassGeneratingEntityInstantiator.createInstance(ClassGeneratingEntityInstantiator.java:83) ~[spring-data-commons-1.12.6.RELEASE.jar:na]
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:252) ~[spring-data-mongodb-1.9.6.RELEASE.jar:na]
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.read(MappingMongoConverter.java:232) ~[spring-data-mongodb-1.9.6.RELEASE.jar:na]
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.readValue(MappingMongoConverter.java:1197) ~[spring-data-mongodb-1.9.6.RELEASE.jar:na]
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.access$200(MappingMongoConverter.java:79) ~[spring-data-mongodb-1.9.6.RELEASE.jar:na]
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter$MongoDbPropertyValueProvider.getPropertyValue(MappingMongoConverter.java:1145) ~[spring-data-mongodb-1.9.6.RELEASE.jar:na]
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter.getValueInternal(MappingMongoConverter.java:871) ~[spring-data-mongodb-1.9.6.RELEASE.jar:na]
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter$1.doWithPersistentProperty(MappingMongoConverter.java:284) ~[spring-data-mongodb-1.9.6.RELEASE.jar:na]
    at org.springframework.data.mongodb.core.convert.MappingMongoConverter$1.doWithPersistentProperty(MappingMongoConverter.java:272) ~[spring-data-mongodb-1.9.6.RELEASE.jar:na]

我能够使用xml将数据推送到pojo映射，但在重新启动时，它无法从mongo中提取数据，因为它尝试转换为XMLGregorianCalendar实例！

我们是否可以在不改变现有xml-pojo映射的情况下编写根级转换器，以使用java.util.Date转换和保存datetime实例。

以下是我的示例代码！

保存时输入XML：

<?xml version="1.0" encoding="UTF-8"?>
<Document xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <Entity>
        <Header>
            <MsgId>12345wqw</MsgId>
            <DateTimeField>2009-09-28T14:07:00</DateTimeField>
            <Info>
                <Name>Some Name</Name>
                <Address>
                    <StrtNm>Times Square</StrtNm>
                    <BldgNb>7</BldgNb>
                    <PstCd>NY 10036</PstCd>
                    <TwnNm>New York</TwnNm>
                    <Ctry>US</Ctry>
                </Address>
            </Info>
        </Header>
    </Entity>
</Document>

Mapped Pojo：

import java.math.BigDecimal;
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.XmlSchemaType;
import javax.xml.bind.annotation.XmlType;
import javax.xml.datatype.XMLGregorianCalendar;


@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Header", propOrder = {"msgId", "DateTimeField", "Info"})
public class GroupHeader48 {

    @XmlElement(name = "MsgId", required = true)
    protected String msgId;

    @XmlElement(name = "DateTimeField", required = true)
    @XmlSchemaType(name = "dateTime")
    protected XMLGregorianCalendar creDtTm;

    @XmlElement(name = "Info", required = true)
    protected Information info;


    public String getMsgId() {
        return this.msgId;
    }


    public void setMsgId(final String value) {
        this.msgId = value;
    }


    public XMLGregorianCalendar getCreDtTm() {
        return this.creDtTm;
    }


    public void setCreDtTm(final XMLGregorianCalendar value) {
        this.creDtTm = value;
    }

    public Information getInfo() {
        return this.info;
    }


    public void setInitgPty(final Information value) {
        this.info = value;
    }
}

我也尝试过使用适配器，但是我有很多pojos，其中使用了datetime字段，并且无法控制更改映射，因为它来自另一个进程

从mongo获取XMLGregorianCalendar转换时出错 - Spring Data Mongo

0 个答案: