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微信支付工具类:Map、XML 的转换,生成、校验 sign
import org.w3c.dom.Entity;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.*;
/**
* 微信支付工具类,xml转map,map转xml,生成签名
*/
public class WXPayUtil {
/**
* XML格式字符串转换为Map
*
* @param strXML XML字符串
* @return XML数据转换后的Map
* @throws Exception
*/
public static Map<String, String> xmlToMap(String strXML) throws Exception {
try {
Map<String, String> data = new HashMap<String, String>();
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
InputStream stream = new ByteArrayInputStream(strXML.getBytes("UTF-8"));
org.w3c.dom.Document doc = documentBuilder.parse(stream);
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getDocumentElement().getChildNodes();
for (int idx = 0; idx < nodeList.getLength(); ++idx) {
Node node = nodeList.item(idx);
if (node.getNodeType() == Node.ELEMENT_NODE) {
org.w3c.dom.Element element = (org.w3c.dom.Element) node;
data.put(element.getNodeName(), element.getTextContent());
}
}
try {
stream.close();
} catch (Exception ex) {
// do nothing
}
return data;
} catch (Exception ex) {
throw ex;
}
}
/**
* 将Map转换为XML格式的字符串
*
* @param data Map类型数据
* @return XML格式的字符串
* @throws Exception
*/
public static String mapToXml(Map<String, String> data) throws Exception {
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder= documentBuilderFactory.newDocumentBuilder();
org.w3c.dom.Document document = documentBuilder.newDocument();
org.w3c.dom.Element root = document.createElement("xml");
document.appendChild(root);
for (String key: data.keySet()) {
String value = data.get(key);
if (value == null) {
value = "";
}
value = value.trim();
org.w3c.dom.Element filed = document.createElement(key);
filed.appendChild(document.createTextNode(value));
root.appendChild(filed);
}
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
DOMSource source = new DOMSource(document);
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
StringWriter writer = new StringWriter();
StreamResult result = new StreamResult(writer);
transformer.transform(source, result);
String output = writer.getBuffer().toString(); //.replaceAll("\n|\r", "");
try {
writer.close();
}
catch (Exception ex) {
}
return output;
}
/**
* 生成微信支付sign
* @return
*/
public static String createSign(SortedMap<String, String> params, String key){
StringBuilder sb = new StringBuilder();
Set<Map.Entry<String, String>> es = params.entrySet();
Iterator<Map.Entry<String,String>> it = es.iterator();
//生成 stringA="appid=wxd930ea5d5a258f4f&body=test&device_info=1000&mch_id=10000100&nonce_str=ibuaiVcKdpRxkhJA";
while (it.hasNext()){
Map.Entry<String,String> entry = (Map.Entry<String,String>)it.next();
String k = (String)entry.getKey();
String v = (String)entry.getValue();
if(null != v && !"".equals(v) && !"sign".equals(k) && !"key".equals(k)){
sb.append(k+"="+v+"&");
}
}
sb.append("key=").append(key);
String sign = CommonUtils.MD5(sb.toString()).toUpperCase();
return sign;
}
/**
* 校验签名
* @param params
* @param key
* @return
*/
public static boolean isCorrectSign(SortedMap<String, String> params, String key){
String sign = createSign(params,key);
String weixinPaySign = params.get("sign").toUpperCase();
return weixinPaySign.equals(sign);
}
/**
* 获取有序map
* @param map
* @return
*/
public static SortedMap<String,String> getSortedMap(Map<String,String> map){
SortedMap<String, String> sortedMap = new TreeMap<>();
Iterator<String> it = map.keySet().iterator();
while (it.hasNext()){
String key = (String)it.next();
String value = map.get(key);
String temp = "";
if( null != value){
temp = value.trim();
}
sortedMap.put(key,temp);
}
return sortedMap;
}
}
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