字符串类型的xml数据，反序列化为自定义的实体类

应用场景

lz最近在开发一个接口，需要接收xml类型的数据，然后对接收到的数据进行业务处理。
关于如何从请求中接收数据，优快云上有很多文章。
再次只介绍下，我是如何把接收到的xml字符串转化为实体类的，大家有不同见解，欢迎给予建议。

准备以及实现

1.xml数据
批次（一个请求中可以存在多个批次）batch
批次编号batchCode
订单（一个批次号中可以存在多个订单）soOrder
订单编码orderCode
打印顺序printOrder

<?xml version="1.0" encoding="utf-8"?>
<request>
<batchs>
<batch>
<batchCode>22</batchCode>
<soOrders>
<soOrder>
<orderCode>80000002866</orderCode>
<printOrder>10</printOrder>
</soOrder>
<soOrder>
<orderCode>08011801407</orderCode>
<printOrder>11</printOrder>
</soOrder>
</soOrders>
</batch>
<batch>
<batchCode>33</batchCode>
<soOrders>
<soOrder>
<orderCode>08011801435</orderCode>
<printOrder>10</printOrder>
</soOrder>
<soOrder>
<orderCode>08011801445</orderCode>
<printOrder>11</printOrder>
</soOrder>
</soOrders>
</batch>
</batchs>
</request>

2.序列化与反序列化工具类XmlUtils

import java.io.StringReader;
import java.io.StringWriter;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

/**
 * Copyright (c) 2017. ****** All Rights Reserved.
 * 
 * @描述: TODO
 * @作者: lizy
 * @创建: 2018-2-7 下午3:56:49
 * @版本: V1.0 *
 */
public class XmlUtils {
    /**
     * 将对象直接转换成String类型的 XML输出
     * 
     * @param obj
     * @return
     */
    public static String convertToXml(Object obj) {
        // 创建输出流
        StringWriter sw = new StringWriter();
        try {
            // 利用jdk中自带的转换类实现
            JAXBContext context = JAXBContext.newInstance(obj.getClass());

            Marshaller marshaller = context.createMarshaller();
            // 格式化xml输出的格式
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,
                    Boolean.TRUE);
            // 将对象转换成输出流形式的xml
            marshaller.marshal(obj, sw);
        } catch (JAXBException e) {
            e.printStackTrace();
        }
        return sw.toString();
    }

    /**
     * 将String类型的xml转换成对象
     */
    public static Object convertXmlStrToObject(Class clazz, String xmlStr) {
        Object xmlObject = null;
        try {
            JAXBContext context = JAXBContext.newInstance(clazz);
            // 进行将Xml转成对象的核心接口
            Unmarshaller unmarshaller = context.createUnmarshaller();
            StringReader sr = new StringReader(xmlStr);
            xmlObject = unmarshaller.unmarshal(sr);
        } catch (JAXBException e) {
            e.printStackTrace();
        }
        return xmlObject;
    }
}

3.相关实体类
请求类ThermOrderPrintRequest

import java.io.Serializable;
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.XmlElementWrapper;
import javax.xml.bind.annotation.XmlRootElement;

/**
 * Copyright (c) 2017. ****** All Rights Reserved.
 * 
 * @描述: 
 * @作者: lizy
 * @创建: 2018-2-7 下午4:24:51
 * @版本: V1.0 *
 */
@XmlRootElement(name = "request")
@XmlAccessorType(XmlAccessType.FIELD)
public class ThermOrderPrintRequest implements Serializable{

    @XmlElementWrapper(name = "batchs")
    @XmlElement(name = "batch")
    private List<ThermOrderPrintBatch> batchs;

    public List<ThermOrderPrintBatch> getBatchs() {
        return batchs;
    }

    public void setBatchs(List<ThermOrderPrintBatch> batchs) {
        this.batchs = batchs;
    }

}

请求批次类ThermOrderPrintBatch

import java.io.Serializable;
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.XmlElementWrapper;
import javax.xml.bind.annotation.XmlList;
import javax.xml.bind.annotation.XmlRootElement;

/**
 * Copyright (c) 2017. ***** All Rights Reserved.
 * 
 * @描述: TODO
 * @作者: lizy
 * @创建: 2018-2-7 下午4:17:10
 * @版本: V1.0 *
 */
@XmlAccessorType(XmlAccessType.FIELD)
public class ThermOrderPrintBatch implements Serializable{

    @XmlElement(name = "batchCode")
    private String batchCode;// 批次编号

    @XmlElementWrapper(name = "soOrders")
    @XmlElement(name = "soOrder")
    private List<ThermOrderPrint> orderPrints;

    public String getBatchCode() {
        return batchCode;
    }

    public void setBatchCode(String batchCode) {
        this.batchCode = batchCode;
    }

    public List<ThermOrderPrint> getOrderPrints() {
        return orderPrints;
    }

    public void setOrderPrints(List<ThermOrderPrint> orderPrints) {
        this.orderPrints = orderPrints;
    }

}

订单类ThermOrderPrint

import java.io.Serializable;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

/**
 * Copyright (c) 2017. ****** All Rights Reserved.
 * 
 * @描述: 
 * @作者: lizy
 * @创建: 2018-2-7 下午4:00:53
 * @版本: V1.0 *
 */
@XmlAccessorType(XmlAccessType.FIELD)
public class ThermOrderPrint implements Serializable{

    @XmlElement(name = "orderCode")
    private String orderCode;// 订单编码

    @XmlElement(name = "printOrder")
    private String printOrder;// 打印顺序

    public String getOrderCode() {
        return orderCode;
    }
    public void setOrderCode(String orderCode) {
        this.orderCode = orderCode;
    }
    public String getPrintOrder() {
        return printOrder;
    }
    public void setPrintOrder(String printOrder) {
        this.printOrder = printOrder;
    }

}

4.反序列化为ThermOrderPrintRequest

ThermOrderPrintRequest orderPrintRequest = (ThermOrderPrintRequest) XmlUtils
                            .convertXmlStrToObject(
                                    ThermOrderPrintRequest.class,XmlString);

注意事项

1. xml内容不能有转义字符，否则在反序列化会报错；
2. @XmlRootElement在请求类加注释，表示为根节点；
3. @XmlAccessorType用了这个之后就会自动忽略setter/getter方法。不用这个就需要去掉注解，需要保证属性名和xml里的表签名一致；
4. @XmlElement(name = "batch")表明节点，name需要和节点名一致；
5. @XmlElementWrapper(name = "batchs")表示生成一个包装 XML 表示形式的包装器元素。 此元素主要用于生成一个包装集合的包装器 XML 元素；