pom.xml

<dependency><groupId>com.thoughtworks.xstream</groupId><artifactId>xstream</artifactId><version>1.4.7</version>
</dependency><dependency><groupId>com.thoughtworks.xstream</groupId><artifactId>xstream</artifactId><version>1.4.7</version>
</dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.16.18</version><scope>provided</scope>
</dependency><dependency><groupId>com.google.guava</groupId><artifactId>guava</artifactId><version>18.0</version>
</dependency>

XStreamInitializer:

package cn.edu360.bike.test;import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.converters.reflection.PureJavaReflectionProvider;
import com.thoughtworks.xstream.core.util.QuickWriter;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.thoughtworks.xstream.io.xml.PrettyPrintWriter;
import com.thoughtworks.xstream.io.xml.XppDriver;
import com.thoughtworks.xstream.security.NullPermission;
import com.thoughtworks.xstream.security.PrimitiveTypePermission;import java.io.Writer;public class XStreamInitializer {public static XStream getInstance() {XStream xstream = new XStream(new PureJavaReflectionProvider(), new XppDriver() {@Overridepublic HierarchicalStreamWriter createWriter(Writer out) {return new PrettyPrintWriter(out, getNameCoder()) {protected String PREFIX_CDATA = "<![CDATA[";protected String SUFFIX_CDATA = "]]>";protected String PREFIX_MEDIA_ID = "<MediaId>";protected String SUFFIX_MEDIA_ID = "</MediaId>";@Overrideprotected void writeText(QuickWriter writer, String text) {if (text.startsWith(this.PREFIX_CDATA) && text.endsWith(this.SUFFIX_CDATA)) {writer.write(text);} else if (text.startsWith(this.PREFIX_MEDIA_ID) && text.endsWith(this.SUFFIX_MEDIA_ID)) {writer.write(text);} else {super.writeText(writer, text);}}@Overridepublic String encodeNode(String name) {return name;//防止将_转换成__}};}});xstream.ignoreUnknownElements();xstream.setMode(XStream.NO_REFERENCES);xstream.addPermission(NullPermission.NULL);xstream.addPermission(PrimitiveTypePermission.PRIMITIVES);return xstream;}}

BaseWxPayResult:

package cn.edu360.bike.test;import com.google.common.base.Joiner;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.annotations.XStreamAlias;
import lombok.*;
import org.apache.commons.lang3.StringUtils;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;@Data
public abstract class BaseWxPayResult {/*** 返回状态码.*/@XStreamAlias("return_code")protected String returnCode;/*** 返回信息.*/@XStreamAlias("return_msg")protected String returnMsg;//当return_code为SUCCESS的时候，还会包括以下字段：/*** 业务结果.*/@XStreamAlias("result_code")private String resultCode;/*** 错误代码.*/@XStreamAlias("err_code")private String errCode;/*** 错误代码描述.*/@XStreamAlias("err_code_des")private String errCodeDes;/*** 公众账号ID.*/@XStreamAlias("appid")private String appid;/*** 商户号.*/@XStreamAlias("mch_id")private String mchId;/*** 服务商模式下的子公众账号ID.*/@XStreamAlias("sub_appid")private String subAppId;/*** 服务商模式下的子商户号.*/@XStreamAlias("sub_mch_id")private String subMchId;/*** 随机字符串.*/@XStreamAlias("nonce_str")private String nonceStr;/*** 签名.*/@XStreamAlias("sign")private String sign;//以下为辅助属性/*** xml字符串.*/private String xmlString;/*** xml的Document对象，用于解析xml文本.*/private Document xmlDoc;/*** 将xml字符串转换成Document对象，以便读取其元素值.*/private Document getXmlDoc() {if (this.xmlDoc != null) {return this.xmlDoc;}try {this.xmlDoc = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new ByteArrayInputStream(this.xmlString.getBytes("UTF-8")));return xmlDoc;} catch (SAXException | IOException | ParserConfigurationException e) {throw new RuntimeException("非法的xml文本内容：" + this.xmlString);}}/*** 将bean通过保存的xml字符串转换成map.*/public Map<String, String> toMap() {if (StringUtils.isBlank(this.xmlString)) {throw new RuntimeException("xml数据有问题，请核实！");}Map<String, String> result = new HashMap<>();Document doc = this.getXmlDoc();try {NodeList list = (NodeList) XPathFactory.newInstance().newXPath().compile("/xml/*").evaluate(doc, XPathConstants.NODESET);int len = list.getLength();for (int i = 0; i < len; i++) {result.put(list.item(i).getNodeName(), list.item(i).getTextContent());}} catch (XPathExpressionException e) {throw new RuntimeException("非法的xml文本内容：" + xmlString);}return result;}/*** 从xml字符串创建bean对象.*/public static <T extends BaseWxPayResult> T fromXML(String xmlString, Class<T> clz) {XStream xstream = XStreamInitializer.getInstance();xstream.processAnnotations(clz);T result = (T) xstream.fromXML(xmlString);result.setXmlString(xmlString);return result;}/*** 获取xml中元素的值.*/public String getXmlValue(String... path) {Document doc = this.getXmlDoc();String expression = String.format("/%s//text()", Joiner.on("/").join(path));try {return (String) XPathFactory.newInstance().newXPath().compile(expression).evaluate(doc, XPathConstants.STRING);} catch (XPathExpressionException e) {throw new RuntimeException("未找到相应路径的文本：" + expression);}}/*** 获取xml中元素的值，作为int值返回.*/Integer getXmlValueAsInt(String... path) {String result = this.getXmlValue(path);if (StringUtils.isBlank(result)) {return null;}return Integer.valueOf(result);}}

WxPayOrderQueryResult:

package cn.edu360.bike.test;import com.google.common.collect.Lists;
import com.thoughtworks.xstream.annotations.XStreamAlias;
import lombok.*;import java.util.List;/*** <pre>*  查询订单 返回结果对象* Created by Binary Wang on 2016-10-24.* 注释中各行每个字段描述对应如下：* <li>字段名* <li>变量名* <li>是否必填* <li>类型* <li>示例值* <li>描述* </pre>**/@Data
@NoArgsConstructor
@XStreamAlias("xml")
public class WxPayOrderQueryResult extends BaseWxPayResult {/*** <pre>* 字段名：营销详情.* 变量名：promotion_detail* 是否必填：否，单品优惠才有* 类型：String(6000)* 示例值：[{"promotion_detail":[{"promotion_id":"109519","name":"单品惠-6","scope":"SINGLE","type":"DISCOUNT","amount":5,"activity_id":"931386","wxpay_contribute":0,"merchant_contribute":0,"other_contribute":5,"goods_detail":[{"goods_id":"a_goods1","goods_remark":"商品备注","quantity":7,"price":1,"discount_amount":4},{"goods_id":"a_goods2","goods_remark":"商品备注","quantity":1,"price":2,"discount_amount":1}]}]}* 描述：单品优惠专用参数，详见https://pay.weixin.qq.com/wiki/doc/api/danpin.php?chapter=9_201&index=3* </pre>*/@XStreamAlias("promotion_detail")private String promotionDetail;/*** <pre>设备号* device_info* 否* String(32)* 013467007045764* 微信支付分配的终端设备号，* </pre>*/@XStreamAlias("device_info")private String deviceInfo;/*** <pre>用户标识* openid* 是* String(128)* oUpF8uMuAJO_M2pxb1Q9zNjWeS6o* 用户在商户appid下的唯一标识* </pre>*/@XStreamAlias("openid")private String openid;/*** <pre>是否关注公众账号* is_subscribe* 否* String(1)* Y* 用户是否关注公众账号，Y-关注，N-未关注，仅在公众账号类型支付有效* </pre>*/@XStreamAlias("is_subscribe")private String isSubscribe;/*** <pre>交易类型* trade_type* 是* String(16)* JSAPI* 调用接口提交的交易类型，取值如下：JSAPI，NATIVE，APP，MICROPAY，详细说明见参数规定* </pre>*/@XStreamAlias("trade_type")private String tradeType;/*** <pre>交易状态* trade_state* 是* String(32)* SUCCESS* SUCCESS—支付成功,REFUND—转入退款,NOTPAY—未支付,CLOSED—已关闭,REVOKED—已撤销（刷卡支付）,USERPAYING--用户支付中,PAYERROR--支付失败(其他原因，如银行返回失败)* </pre>*/@XStreamAlias("trade_state")private String tradeState;/*** <pre>付款银行* bank_type* 是* String(16)* CMC* 银行类型，采用字符串类型的银行标识* </pre>*/@XStreamAlias("bank_type")private String bankType;/*** <pre>订单金额* total_fee* 是* Int* 100* 订单总金额，单位为分* </pre>*/@XStreamAlias("total_fee")private Integer totalFee;/*** <pre>应结订单金额* settlement_total_fee* 否* Int* 100* 应结订单金额=订单金额-非充值代金券金额，应结订单金额<=订单金额。* </pre>*/@XStreamAlias("settlement_total_fee")private Integer settlementTotalFee;/*** <pre>货币种类* fee_type* 否* String(8)* CNY* 货币类型，符合ISO 4217标准的三位字母代码，默认人民币：CNY，其他值列表详见货币类型* </pre>*/@XStreamAlias("fee_type")private String feeType;/*** <pre>现金支付金额* cash_fee* 是* Int* 100* 现金支付金额订单现金支付金额，详见支付金额* </pre>*/@XStreamAlias("cash_fee")private Integer cashFee;/*** <pre>现金支付货币类型* cash_fee_type* 否* String(16)* CNY* 货币类型，符合ISO 4217标准的三位字母代码，默认人民币：CNY，其他值列表详见货币类型* </pre>*/@XStreamAlias("cash_fee_type")private String cashFeeType;/*** <pre>代金券金额* coupon_fee* 否* Int* 100* “代金券”金额<=订单金额，订单金额-“代金券”金额=现金支付金额，详见支付金额* </pre>*/@XStreamAlias("coupon_fee")private Integer couponFee;/*** <pre>代金券使用数量* coupon_count* 否* Int* 1* 代金券使用数量* </pre>*/@XStreamAlias("coupon_count")private Integer couponCount;private List<Coupon> coupons;/*** <pre>微信支付订单号* transaction_id* 是* String(32)* 1009660380201506130728806387* 微信支付订单号* </pre>*/@XStreamAlias("transaction_id")private String transactionId;/*** <pre>商户订单号* out_trade_no* 是* String(32)* 20150806125346* 商户系统的订单号，与请求一致。* </pre>*/@XStreamAlias("out_trade_no")private String outTradeNo;/*** <pre>附加数据* attach* 否* String(128)* 深圳分店* 附加数据，原样返回* </pre>*/@XStreamAlias("attach")private String attach;/*** <pre>支付完成时间* time_end* 是* String(14)* 20141030133525* 订单支付时间，格式为yyyyMMddHHmmss，如2009年12月25日9点10分10秒表示为20091225091010。其他详见时间规则* </pre>*/@XStreamAlias("time_end")private String timeEnd;/*** <pre>交易状态描述* trade_state_desc* 是* String(256)* 支付失败，请重新下单支付* 对当前查询订单状态的描述和下一步操作的指引* </pre>*/@XStreamAlias("trade_state_desc")private String tradeStateDesc;/*** 通过xml组装coupons属性内容*/public void composeCoupons() {if (this.couponCount != null && this.couponCount > 0) {this.coupons = Lists.newArrayList();for (int i = 0; i < this.couponCount; i++) {this.coupons.add(new Coupon(this.getXmlValue("xml/coupon_type_" + i),this.getXmlValue("xml/coupon_id_" + i),this.getXmlValueAsInt("xml/coupon_fee_" + i)));}}}@Data@Builder(builderMethodName = "newBuilder")@AllArgsConstructorpublic static class Coupon {/*** <pre>代金券类型* coupon_type_$n* 否* String* CASH* <li>CASH--充值代金券* <li>NO_CASH---非充值代金券*     订单使用代金券时有返回（取值：CASH、NO_CASH）。$n为下标,从0开始编号，举例：coupon_type_$0* </pre>*/private String couponType;/*** <pre>代金券ID* coupon_id_$n* 否* String(20)* 10000* 代金券ID, $n为下标，从0开始编号* </pre>*/private String couponId;/*** <pre>单个代金券支付金额* coupon_fee_$n* 否* Int* 100* 单个代金券支付金额, $n为下标，从0开始编号* </pre>*/private Integer couponFee;}}

test:

package cn.edu360.bike.test;public class XmlTest {public static void main(String[] args){
//        String xml = "<xml><return_code>200</return_code><return_msg>SUCCESS</return_msg><total>123</total></xml>";
//        BaseWxPayResult baseWxPayResult = BaseWxPayResult.fromXML(xml, BaseWxPayResult.class);
//        System.out.println(baseWxPayResult);
//        System.out.println(baseWxPayResult.toMap());
//        System.out.println(baseWxPayResult.getXmlValue("xml/return_msg"));
//        System.out.println(baseWxPayResult.getXmlValueAsInt("xml/total"));String xml2 = "<xml>" +"<cash_fee>200</cash_fee><coupon_count>1</coupon_count>" +"<transaction_id>123123123</transaction_id>" +"<coupon_type_0>type0</coupon_type_0>" +"<coupon_id_0>0</coupon_id_0>" +"<coupon_fee_0>0</coupon_fee_0></xml>";WxPayOrderQueryResult queryResult = WxPayOrderQueryResult.fromXML(xml2, WxPayOrderQueryResult.class);queryResult.composeCoupons();System.out.println(queryResult);}
}

参考：
https://gitee.com/52itstyle/spring-boot-pay/tree/master/src/main/java/com/itstyle/modules/weixinpay/controller