Java类和xml文件的相互转换

Java类和xml文件的相互转换

前两天公司做一个工行支付的项目，数据传递都是通过xml形式加密传递的，在网上看了相关的资料，感觉都不算很好，有的理论讲的好，可是没有参考代码。有的有代码，但是代码不全，今天抽空整理出一份真实的项目案例，和完整代码。供大家参考互相学习，有错误的地方，希望大家指出来，共同学习：

不说废话，直接上代码，相信大家都能看懂,大神勿喷，小鸟也不怕，东西很简单，就是使用经验，用一次大家都会了。

这里注重经验，每个注解的意思，根据实战查资料了解。谢谢观赏。

• 列举一下xml效果

----对象解析成xml文件---
<?xml version="1.0" encoding="GBK" standalone="no"?>
<B2CReq>
    <interfaceName> </interfaceName>
    <interfaceVersion> </interfaceVersion>
    <orderInfo>
        <orderDate> </orderDate>
        <orderid> </orderid>
        <amount> </amount>
        <installmentTimes> </installmentTimes>
        <curType> </curType>
        <merID> </merID>
        <merAcct> </merAcct>
    </orderInfo>
    <custom>
        <verifyJoinFlag> </verifyJoinFlag>
        <Language> </Language>
    </custom>
    <message>
        <goodsID> </goodsID>
        <goodsName> </goodsName>
        <goodsNum> </goodsNum>
        <carriageAmt> </carriageAmt>
        <merHint> </merHint>
        <remark1> </remark1>
        <remark2> </remark2>
        <merURL> </merURL>
        <merVAR> </merVAR>
        <notifyType> </notifyType>
        <resultType> </resultType>
        <backup1> </backup1>
        <backup2> </backup2>
        <backup3> </backup3>
        <backup4> </backup4>
    </message>
</B2CReq>

• java代码

        //先把准备生成xml的类，交给这个解析器
        //marshall用于解析生成xml
        //unmarshall用于xml生成java类
        //validate没有仔细研究，感兴趣，可以自己使用
        JAXBContext context = JAXBContext.newInstance(B2CReq.class);
        Marshaller marshaller = context.createMarshaller();

        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); // 格式化输出
        marshaller.setProperty(Marshaller.JAXB_ENCODING, "GBK");// 编码格式,默认为utf-8
        marshaller.setProperty(Marshaller.JAXB_FRAGMENT, false);// 是否省略xml头信息

        System.out.println("----对象解析成xml文件---");
        //对象解析成xml文件 这里我为了是xml成对出现，我在里面对象里面的字段都是使用 空格字符串
        B2CReq b2CReq = new B2CReq();

        OrderInfo orderInfo = new OrderInfo();
        b2CReq.setOrderInfo(orderInfo);

        Custom custom = new Custom();
        b2CReq.setCustom(custom);

        Message message = new Message();
        b2CReq.setMessage(message);

        //  marshaller.marshal(b2CReq, System.out);
        //把对象解析成string
        StringWriter sw = new StringWriter();
        marshaller.marshal(b2CReq, sw);
        System.out.println(sw.toString().replace("standalone=\"yes\"","standalone=\"no\""));


        String s = sw.toString();
        //xml转换java类
        Unmarshaller unmarshaller = context.createUnmarshaller();
        B2CReq b2CReq1 = new B2CReq();
        b2CReq1 = (B2CReq) unmarshaller.unmarshal(new StringReader(s));
        System.out.println(b2CReq1.getInterfaceVersion());

实体类中的标签以代码方式展现

B2CReq

/**
 * Created by liuxin on 16/12/13.
 * 请求数据模型
 * 目的是映射xml文件
 */
@XmlRootElement(name = "B2CReq")//根的名字，因为默认是首字符小写的，我需要大写，所以我限制了
@XmlAccessorType(XmlAccessType.FIELD)
public class B2CReq implements Serializable {

    //接口名称固定的
    public String interfaceName=" ";
    //接口版本号
    public String interfaceVersion=" ";

    public OrderInfo orderInfo;

    public Custom custom;//看我这个实体的注解，只用使用一个

    public Message message;

    public Message getMessage() {
        return message;
    }

    public void setMessage(Message message) {
        this.message = message;
    }

    public Custom getCustom() {
        return custom;
    }

    public void setCustom(Custom custom) {
        this.custom = custom;
    }

    public String getInterfaceName() {
        return interfaceName;
    }

    public void setInterfaceName(String interfaceName) {
        this.interfaceName = interfaceName;
    }

    public String getInterfaceVersion() {
        return interfaceVersion;
    }

    public void setInterfaceVersion(String interfaceVersion) {
        this.interfaceVersion = interfaceVersion;
    }

    public OrderInfo getOrderInfo() {
        return orderInfo;
    }

    public void setOrderInfo(OrderInfo orderInfo) {
        this.orderInfo = orderInfo;
    }
}

Custom

@XmlAccessorType(XmlAccessType.FIELD)
public class Custom {
    //联名校验标志
    public String verifyJoinFlag=" ";
    //语言版本默认中文zh_CN
    public String Language=" ";

    public String getVerifyJoinFlag() {
        return verifyJoinFlag;
    }

    public void setVerifyJoinFlag(String verifyJoinFlag) {
        this.verifyJoinFlag = verifyJoinFlag;
    }

    public String getLanguage() {
        return Language;
    }

    public void setLanguage(String language) {
        Language = language;
    }
}

Message

@XmlAccessorType(XmlAccessType.FIELD)
public class Message {
    //商品编号
    public String goodsID=" ";
    //商品名称
    public String goodsName=" ";
    //商品数量
    public String goodsNum=" ";
    //已含运费金额
    public String carriageAmt=" ";
    //商户提示
    public String merHint=" ";
    //备注字段1
    public String remark1=" ";
    //备注字段2
    public String remark2=" ";
    //通知商户URL
    public String merURL=" ";
    //商户变量
    public String merVAR=" ";
    //通知类型HS 以http协议post提交
    public String notifyType=" ";
    //结果发送类型0无论成功失败都发送信息
    public String resultType=" ";
    //备用字段1
    public String backup1=" ";
    //备用字段2
    public String backup2=" ";
    //备用字段3
    public String backup3=" ";
    //备用字段4
    public String backup4=" ";

    public String getGoodsID() {
        return goodsID;
    }

    public void setGoodsID(String goodsID) {
        this.goodsID = goodsID;
    }

    public String getGoodsName() {
        return goodsName;
    }

    public void setGoodsName(String goodsName) {
        this.goodsName = goodsName;
    }

    public String getGoodsNum() {
        return goodsNum;
    }

    public void setGoodsNum(String goodsNum) {
        this.goodsNum = goodsNum;
    }

    public String getCarriageAmt() {
        return carriageAmt;
    }

    public void setCarriageAmt(String carriageAmt) {
        this.carriageAmt = carriageAmt;
    }

    public String getMerHint() {
        return merHint;
    }

    public void setMerHint(String merHint) {
        this.merHint = merHint;
    }

    public String getRemark1() {
        return remark1;
    }

    public void setRemark1(String remark1) {
        this.remark1 = remark1;
    }

    public String getRemark2() {
        return remark2;
    }

    public void setRemark2(String remark2) {
        this.remark2 = remark2;
    }

    public String getMerURL() {
        return merURL;
    }

    public void setMerURL(String merURL) {
        this.merURL = merURL;
    }

    public String getMerVAR() {
        return merVAR;
    }

    public void setMerVAR(String merVAR) {
        this.merVAR = merVAR;
    }

    public String getNotifyType() {
        return notifyType;
    }

    public void setNotifyType(String notifyType) {
        this.notifyType = notifyType;
    }

    public String getResultType() {
        return resultType;
    }

    public void setResultType(String resultType) {
        this.resultType = resultType;
    }

    public String getBackup1() {
        return backup1;
    }

    public void setBackup1(String backup1) {
        this.backup1 = backup1;
    }

    public String getBackup2() {
        return backup2;
    }

    public void setBackup2(String backup2) {
        this.backup2 = backup2;
    }

    public String getBackup3() {
        return backup3;
    }

    public void setBackup3(String backup3) {
        this.backup3 = backup3;
    }

    public String getBackup4() {
        return backup4;
    }

    public void setBackup4(String backup4) {
        this.backup4 = backup4;
    }
}

OrderInfo

@XmlAccessorType(XmlAccessType.FIELD)
public class OrderInfo {
    //交易时间
    public String orderDate=" ";
    //订单号
    public String orderid=" ";
    //订单金额
    public String amount=" ";
    //分期付款期数
    public String installmentTimes=" ";
    //支付币种
    public String curType=" ";
    //商户代码
    public String merID=" ";
    //商户账号
    public String merAcct=" ";

    public String getOrderDate() {
        return orderDate;
    }

    public void setOrderDate(String orderDate) {
        this.orderDate = orderDate;
    }

    public String getOrderid() {
        return orderid;
    }

    public void setOrderid(String orderid) {
        this.orderid = orderid;
    }

    public String getAmount() {
        return amount;
    }

    public void setAmount(String amount) {
        this.amount = amount;
    }

    public String getInstallmentTimes() {
        return installmentTimes;
    }

    public void setInstallmentTimes(String installmentTimes) {
        this.installmentTimes = installmentTimes;
    }

    public String getCurType() {
        return curType;
    }

    public void setCurType(String curType) {
        this.curType = curType;
    }

    public String getMerId() {
        return merID;
    }

    public void setMerId(String merId) {
        this.merID = merId;
    }

    public String getMerAcct() {
        return merAcct;
    }

    public void setMerAcct(String merAcct) {
        this.merAcct = merAcct;
    }
}