JAXB序列化对象与反序列化XML

1、什么是JAXB

JAXB（Java Architecture for XML Binding) 是一个业界的标准，是一项可以根据XML Schema产生Java类的技术。

该过程中，JAXB也提供了将XML实例文档反向生成Java对象树的方法，并能将Java对象树的内容重新写到XML实例文档。从另一方面来讲，

JAXB提供了快速而简便的方法将XML模式绑定到Java表示，从而使得Java开发者在Java应用程序中能方便地结合XML数据和处理函数。

2、JAR下载

http://www.java2s.com/Code/Jar/j/Downloadjaxbapi22jar.htm

3、Demo

解决字段包含子类，list集合序列化

根节点

RequestVO.java

import java.util.List;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;

@XmlAccessorType(XmlAccessType.FIELD)
//XML文件中的根标识
@XmlRootElement(name = "request")
//控制JAXB 绑定类中属性和字段的排序
@XmlType(propOrder = {
        "entryOrder",
        "orderLine"

})
/**
 * 生产XML根节点
 * @author Stephen
 * @Time 2019年6月27日09:49:36
 * */
public class RequestVO {

private EntryOrder entryOrder;

@XmlElementWrapper(name = "orderLines")
private List<OrderLine> orderLine;

public EntryOrder getEntryOrder() {
    return entryOrder;
}

public void setEntryOrder(EntryOrder entryOrder) {
    this.entryOrder = entryOrder;
}

public List<OrderLine> getOrderLine() {
    return orderLine;
}

public void setOrderLine(List<OrderLine> orderLine) {
    this.orderLine = orderLine;
}

}

EntryOrder.java

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

@XmlAccessorType(XmlAccessType.FIELD)
//XML文件中的根标识
@XmlRootElement(name = "entryOrder")
//控制JAXB 绑定类中属性和字段的排序
@XmlType(propOrder = {
        "totalOrderLines",
        "entryOrderCode",
        "ownerCode",
        "warehouseCode",
        "entryOrderId",
        "entryOrderType",
        "outBizCode",
        "confirmType",
        "status",
        "operateTime",
        "remark"        

})
/**
 * 子节点
 * @author Stephen
 * @Time 2019年6月27日09:49:36
 * */
public class EntryOrder {

    public String totalOrderLines;
    public String entryOrderCode;
    public String ownerCode;
    public String warehouseCode;
    public String entryOrderId;
    public String entryOrderType;
    public String outBizCode;
    public String confirmType;
    public String status;
    public String operateTime;
    public String remark;

    public EntryOrder() {
        this.totalOrderLines = "";
        this.entryOrderCode = "";
        this.ownerCode = "";
        this.warehouseCode = "";
        this.entryOrderId = "";
        this.entryOrderType = "";
        this.outBizCode = "";
        this.confirmType = "";
        this.status = "";
        this.operateTime = "";
        this.remark = "";
    }

    public String getTotalOrderLines() {
        return totalOrderLines;
    }
    public void setTotalOrderLines(String totalOrderLines) {
        this.totalOrderLines = totalOrderLines;
    }
    public String getEntryOrderCode() {
        return entryOrderCode;
    }
    public void setEntryOrderCode(String entryOrderCode) {
        this.entryOrderCode = entryOrderCode;
    }
    public String getOwnerCode() {
        return ownerCode;
    }
    public void setOwnerCode(String ownerCode) {
        this.ownerCode = ownerCode;
    }
    public String getWarehouseCode() {
        return warehouseCode;
    }
    public void setWarehouseCode(String warehouseCode) {
        this.warehouseCode = warehouseCode;
    }
    public String getEntryOrderId() {
        return entryOrderId;
    }
    public void setEntryOrderId(String entryOrderId) {
        this.entryOrderId = entryOrderId;
    }
    public String getEntryOrderType() {
        return entryOrderType;
    }
    public void setEntryOrderType(String entryOrderType) {
        this.entryOrderType = entryOrderType;
    }
    public String getOutBizCode() {
        return outBizCode;
    }
    public void setOutBizCode(String outBizCode) {
        this.outBizCode = outBizCode;
    }
    public String getConfirmType() {
        return confirmType;
    }
    public void setConfirmType(String confirmType) {
        this.confirmType = confirmType;
    }
    public String getStatus() {
        return status;
    }
    public void setStatus(String status) {
        this.status = status;
    }
    public String getOperateTime() {
        return operateTime;
    }
    public void setOperateTime(String operateTime) {
        this.operateTime = operateTime;
    }
    public String getRemark() {
        return remark;
    }
    public void setRemark(String remark) {
        this.remark = remark;
    }

}

OrderLine.java

import java.util.List;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElementWrapper;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;

@XmlAccessorType(XmlAccessType.FIELD)
//XML文件中的根标识
@XmlRootElement(name = "orderLine")
//控制JAXB 绑定类中属性和字段的排序
@XmlType(propOrder = {
        "outBizCode",
        "orderLineNo",
        "ownerCode",
        "itemCode",
        "itemId",
        "itemName",
        "inventoryType",
        "imperfectGrade",
        "planQty",
        "actualQty",
        "batchCode",
        "productDate",
        "expireDate",
        "produceCode",
        "batch",
        "remark"
})
public class OrderLine {
    private String  outBizCode;
    private String  orderLineNo;
    private String  ownerCode;
    private String  itemCode;
    private String  itemId;
    private String  itemName;
    private String  inventoryType;
    private String  imperfectGrade;
    private String  planQty;
    private String  actualQty;
    private String  batchCode;
    private String  productDate;
    private String  expireDate;
    private String  produceCode;
    @XmlElementWrapper(name = "batchs")
    private List<Batch> batch;
    private String remark;

    public OrderLine() {
        this.outBizCode = "";
        this.orderLineNo = "";
        this.ownerCode = "";
        this.itemCode = "";
        this.itemId = "";
        this.itemName = "";
        this.inventoryType = "";
        this.imperfectGrade = "";
        this.planQty = "";
        this.actualQty = "";
        this.batchCode = "";
        this.productDate = "";
        this.expireDate = "";
        this.produceCode = "";
        this.remark = "";
    }

    public List<Batch> getBatchs() {
        return batch;
    }

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

    public String getRemark() {
        return remark;
    }

    public void setRemark(String remark) {
        this.remark = remark;
    }

    public String getOutBizCode() {
        return outBizCode;
    }
    public void setOutBizCode(String outBizCode) {
        this.outBizCode = outBizCode;
    }
    public String getOrderLineNo() {
        return orderLineNo;
    }
    public void setOrderLineNo(String orderLineNo) {
        this.orderLineNo = orderLineNo;
    }
    public String getOwnerCode() {
        return ownerCode;
    }
    public void setOwnerCode(String ownerCode) {
        this.ownerCode = ownerCode;
    }
    public String getItemCode() {
        return itemCode;
    }
    public void setItemCode(String itemCode) {
        this.itemCode = itemCode;
    }
    public String getItemId() {
        return itemId;
    }
    public void setItemId(String itemId) {
        this.itemId = itemId;
    }
    public String getItemName() {
        return itemName;
    }
    public void setItemName(String itemName) {
        this.itemName = itemName;
    }
    public String getInventoryType() {
        return inventoryType;
    }
    public void setInventoryType(String inventoryType) {
        this.inventoryType = inventoryType;
    }
    public String getImperfectGrade() {
        return imperfectGrade;
    }
    public void setImperfectGrade(String imperfectGrade) {
        this.imperfectGrade = imperfectGrade;
    }
    public String getPlanQty() {
        return planQty;
    }
    public void setPlanQty(String planQty) {
        this.planQty = planQty;
    }
    public String getActualQty() {
        return actualQty;
    }
    public void setActualQty(String actualQty) {
        this.actualQty = actualQty;
    }
    public String getBatchCode() {
        return batchCode;
    }
    public void setBatchCode(String batchCode) {
        this.batchCode = batchCode;
    }
    public String getProductDate() {
        return productDate;
    }
    public void setProductDate(String productDate) {
        this.productDate = productDate;
    }
    public String getExpireDate() {
        return expireDate;
    }
    public void setExpireDate(String expireDate) {
        this.expireDate = expireDate;
    }
    public String getProduceCode() {
        return produceCode;
    }
    public void setProduceCode(String produceCode) {
        this.produceCode = produceCode;
    }

}

Batch.java

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

@XmlAccessorType(XmlAccessType.FIELD)
//XML文件中的根标识
@XmlRootElement(name = "batch")
//控制JAXB 绑定类中属性和字段的排序
@XmlType(propOrder = {
        "batchCode",
        "productDate",
        "expireDate",
        "produceCode",
        "inventoryType",
        "imperfectGrade",
        "actualQty"
})
public class Batch {
    private String  batchCode;
    private String  productDate;
    private String  expireDate;
    private String  produceCode;
    private String  inventoryType;
    private String  imperfectGrade;
    private String  actualQty;

    public Batch() {
        this.batchCode = "";
        this.productDate = "";
        this.expireDate = "";
        this.produceCode = "";
        this.inventoryType = "";
        this.imperfectGrade = "";
        this.actualQty = "";
    }

    public String getBatchCode() {
        return batchCode;
    }

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

    public String getProductDate() {
        return productDate;
    }

    public void setProductDate(String productDate) {
        this.productDate = productDate;
    }

    public String getExpireDate() {
        return expireDate;
    }

    public void setExpireDate(String expireDate) {
        this.expireDate = expireDate;
    }

    public String getProduceCode() {
        return produceCode;
    }

    public void setProduceCode(String produceCode) {
        this.produceCode = produceCode;
    }

    public String getInventoryType() {
        return inventoryType;
    }

    public void setInventoryType(String inventoryType) {
        this.inventoryType = inventoryType;
    }

    public String getImperfectGrade() {
        return imperfectGrade;
    }

    public void setImperfectGrade(String imperfectGrade) {
        this.imperfectGrade = imperfectGrade;
    }

    public String getActualQty() {
        return actualQty;
    }

    public void setActualQty(String actualQty) {
        this.actualQty = actualQty;
    }

}

JAXBUtil.java

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;

/**
 * @Description:xml和对象相互转换工具类
 * @author:yaolong
 * @data:2017年2月9日 下午10:46:57
 * @version:1.0
 */
public class JAXBUtil {

    /**
     * JavaBean转换成xml 默认编码UTF-8
     *
     * @param obj
     * @param writer
     * @return
     */
    public static String convertToXml(Object obj) {
        return convertToXml(obj, "UTF-8");
    }

    /**
     * JavaBean转换成xml
     *
     * @param obj
     * @param encoding
     * @return
     */
    public static String convertToXml(Object obj, String encoding) {
        String result = null;
        try {
            JAXBContext context = JAXBContext.newInstance(obj.getClass());
            Marshaller marshaller = context.createMarshaller();
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
            marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding);
            marshaller.setProperty(Marshaller.JAXB_FRAGMENT, false);// 是否省略xml头信息
            StringWriter writer = new StringWriter();
            marshaller.marshal(obj, writer);
            result = writer.toString();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return result;
    }

    /**
     * xml转换成JavaBean
     * @param xml
     * @param c
     * @return
     * @throws JAXBException
     */
    @SuppressWarnings("unchecked")
    public static <T> T converyToJavaBean(String xml, Class<T> c)
            throws JAXBException {
        T t = null;
        JAXBContext context = JAXBContext.newInstance(c);
        Unmarshaller unmarshaller = context.createUnmarshaller();
        t = (T) unmarshaller.unmarshal(new StringReader(xml));
        return t;
    }
}

XML格式

<?xml version="1.0" encoding="utf-8"?>
<request>
    <entryOrder>
        <totalOrderLines></totalOrderLines>
        <entryOrderCode></entryOrderCode>
        <ownerCode></ownerCode>
        <warehouseCode></warehouseCode>
        <entryOrderId></entryOrderId>
        <entryOrderType></entryOrderType>
        <outBizCode></outBizCode>
        <confirmType></confirmType>
        <status></status>
        <operateTime></operateTime>
        <remark></remark>
    </entryOrder>
    <orderLines>
        <orderLine>
            <outBizCode></outBizCode>
            <orderLineNo></orderLineNo>
            <ownerCode></ownerCode>
            <itemCode></itemCode>
            <itemId></itemId>
            <itemName></itemName>
            <inventoryType></inventoryType>
            <imperfectGrade></imperfectGrade>
            <planQty></planQty>
            <actualQty></actualQty>
            <batchCode></batchCode>
            <productDate></productDate>
            <expireDate></expireDate>
            <produceCode></produceCode>
            <batchs>
                <batch>
                    <batchCode></batchCode>
                    <productDate></productDate>
                    <expireDate></expireDate>
                    <produceCode></produceCode>
                    <inventoryType></inventoryType>
                    <imperfectGrade></imperfectGrade>
                    <actualQty></actualQty>
                </batch>
            </batchs>
            <remark></remark>
        </orderLine>
    </orderLines>
</request>

ps:此示例都是针对于字符串的操作 ，重要的是Util