我們的微信支付，使用的是第三方的支付，某銀行的微信支持渠道。所有的接口請求、應答都是xml格式報文，這樣就需要用到xml格式報文的拼裝和解析，這兒簡單講一下。
拼接xml格式報文。
從頁面表單提交和配置文件中讀取出參數，或用實體類接收的頁面傳來的參數。建立map對象，用put()方法把參數添加進去。然后遍歷map，將map轉換成xml。
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StringBuffer soapResultData =
new StringBuffer();
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//xml聲明
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soapResultData.append(
"<?xml version=\"1.0\" encoding=\"GBK\"?><ROOT><MSG_HEAD>");
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//請求頭
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soapResultData.append(requesttoxml(msgHead));
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soapResultData.append(
"</MSG_HEAD><MSG_BODY>");
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//請求體
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soapResultData.append(requesttoxml(resmap));
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soapResultData.append(
"</MSG_BODY></ROOT>");
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/**
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* 將map轉化為XML格式的字符串
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* @param resmap
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* @return
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*/
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public static String requesttoxml(Map<String, String> resmap){
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StringBuffer soapResultData =
new StringBuffer();
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for(String key : resmap.keySet()){
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soapResultData.append(
"<");
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soapResultData.append(key);
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soapResultData.append(
">");
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soapResultData.append(resmap.get(key));
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soapResultData.append(
"</");
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soapResultData.append(key);
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soapResultData.append(
">");
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}
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return soapResultData.toString();
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}
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package com.ustcsoft.business.model;
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import java.io.Serializable;
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import org.apache.commons.digester3.annotations.rules.BeanPropertySetter;
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import org.apache.commons.digester3.annotations.rules.ObjectCreate;
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@ObjectCreate(pattern =
"ROOT/MSG_HEAD")
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public
class ResponseMsgHead implements Serializable {
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/**
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*
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*/
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private
static
final
long serialVersionUID = -
2793215313546940251L;
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@BeanPropertySetter(pattern =
"ROOT/MSG_HEAD/TRAN_CODE")
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private String TRAN_CODE;
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@BeanPropertySetter(pattern =
"ROOT/MSG_HEAD/PARTNER_CODE")
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private String PARTNER_CODE;
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@BeanPropertySetter(pattern =
"ROOT/MSG_HEAD/REQUEST_SERIAL")
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private String REQUEST_SERIAL;
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@BeanPropertySetter(pattern =
"ROOT/MSG_HEAD/RESPONSE_DATE")
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private String RESPONSE_DATE;
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@BeanPropertySetter(pattern =
"ROOT/MSG_HEAD/RESPONSE_TIMESTAMP")
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private String RESPONSE_TIMESTAMP;
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@BeanPropertySetter(pattern =
"ROOT/MSG_HEAD/RESULT_CODE")
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private String RESULT_CODE;
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@BeanPropertySetter(pattern =
"ROOT/MSG_HEAD/RESULT_MESSAGE")
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private String RESULT_MESSAGE;
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//get set 省略，不貼在這兒，自己使用時別忘了生成個set和get方法
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}
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import
static org.apache.commons.digester3.binder.DigesterLoader.newLoader;
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import java.io.StringReader;
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import java.text.SimpleDateFormat;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.TreeMap;
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import org.apache.commons.digester3.Digester;
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import org.apache.commons.digester3.annotations.FromAnnotationsRuleModule;
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import org.apache.log4j.Logger;
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import com.ustcsoft.business.model.CreditPayResponseBody;;
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import com.ustcsoft.business.model.ResponseMsgHead;
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import com.ustcsoft.framework.util.HTTPUtil;
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import com.ustcsoft.framework.util.XMlUtil;
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public
class PayService {
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private
final Map<Class<?>, FromAnnotationsRuleModule> xmlAnnotationModule =
new HashMap<Class<?>, FromAnnotationsRuleModule>();
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private
static
final Logger logger=Logger.getLogger(PayService.class);
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public PayService() {
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xmlAnnotationModule.put(ResponseMsgHead.class,
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new FromAnnotationsRuleModule() {
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@Override
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protected void configureRules() {
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bindRulesFrom(ResponseMsgHead.class);
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}
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});
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xmlAnnotationModule.put(CreditPayResponseBody.class,
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new FromAnnotationsRuleModule() {
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@Override
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protected void configureRules() {
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bindRulesFrom(CreditPayResponseBody.class);
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}
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});
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}
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//中間業務代碼省略……
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public <T>
T parseXml(String xml, Class<T> clazz) throws Exception {
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StringReader sr =
null;
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try {
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Digester digester = newLoader(xmlAnnotationModule.get(clazz)).newDigester();
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sr =
new StringReader(xml);
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T pi = digester.parse(sr);
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digester.clear();
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return pi;
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}
finally {
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if (sr !=
null) {
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sr.close();
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}
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}
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}
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}
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logger.info(
"統一下單接口請求報文："+requestxml);
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String resultxml = HTTPUtil.postByHttps(url, requestxml,
"GBK");
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logger.info(
"統一下單接口返回報文："+resultxml);
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if(resultxml !=
null){
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resultxml = XMlUtil.xmltoUpperCase(resultxml);
//
將XML報文中的標簽，全部轉化為大寫
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ResponseMsgHead head = parseXml(resultxml, ResponseMsgHead.class);
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CreditPayResponseBody body = parseXml(resultxml, CreditPayResponseBody.class);
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if (
null != head) {
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if(head.getRESULT_CODE().equals(
"000000")){
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logger.info(
"下單成功");
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logger.info(
"返回參數：sub_mch_id="+body.getSUB_MCH_ID()+
"，total_fee="+body.getTOTAL_FEE()+
"，out_trade_no="+body.getOUT_TRADE_NO());
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return body;
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}
else{
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logger.info(
"下單失敗，錯誤碼："+head.getRESULT_CODE()+
"，錯誤信息："+head.getRESULT_MESSAGE());
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}
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}
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}
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/**
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* 將XML報文中的標簽，全部轉化為大寫
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* @param xmlMessage
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* @return
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*/
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public static String xmltoUpperCase(String xmlMessage) {
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Pattern pattern = Pattern.compile(
"<.+?>");
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String xml = xmlMessage.split(
">")[
0];
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String xml0 = xmlMessage.substring(
0, xml.length()+
1);
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String xml1 = xmlMessage.substring(xml.length()+
1);
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StringBuilder res =
new StringBuilder();
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int lastIdx =
0;
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Matcher matchr = pattern.matcher(xml1);
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while (matchr.find()) {
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String str = matchr.group();
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res.append(xml1.substring(lastIdx, matchr.start()));
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res.append(str.toUpperCase());
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lastIdx = matchr.end();
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}
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res.append(xml1.substring(lastIdx));
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String result = xml0 + res.toString();
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return result;
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}