微信支付 XML解析工具类

package utils;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.JDOMException;
import org.jdom.input.SAXBuilder;

/**
 * 解析微信XML字符串
 * 
 * @author zengwei
 * @email zengwei@xlceb.com
 * @date 2018年2月23日 下午6:25:56
 */
public class XMLUtil {
    
	/**
	 * 解析xml,返回第一级元素键值对。如果第一级元素有子节点，则此节点的值是子节点的xml数据。
	 * @param strxml
	 * @return
	 * @throws JDOMException
	 * @throws IOException
	 */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public static Map doXMLParse(String strxml) {
		
		Map m = new HashMap();
		
		try {
			strxml = strxml.replaceFirst("encoding=\".*\"", "encoding=\"UTF-8\"");

			if(null == strxml || "".equals(strxml)) {
				return null;
			}
			
			InputStream in = new ByteArrayInputStream(strxml.getBytes("UTF-8"));
			SAXBuilder builder = new SAXBuilder();
			Document doc = builder.build(in);
			Element root = doc.getRootElement();
			List list = root.getChildren();
			Iterator it = list.iterator();
			while(it.hasNext()) {
				Element e = (Element) it.next();
				String k = e.getName();
				String v = "";
				List children = e.getChildren();
				if(children.isEmpty()) {
					v = e.getTextNormalize();
				} else {
					v = XMLUtil.getChildrenText(children);
				}
				
				m.put(k, v);
			}
			
			//关闭流
			in.close();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (JDOMException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		return m;
	}
	
	/**
	 * 获取子结点的xml
	 * @param children
	 * @return String
	 */
	@SuppressWarnings("rawtypes")
	public static String getChildrenText(List children) {
		StringBuffer sb = new StringBuffer();
		if(!children.isEmpty()) {
			Iterator it = children.iterator();
			while(it.hasNext()) {
				Element e = (Element) it.next();
				String name = e.getName();
				String value = e.getTextNormalize();
				List list = e.getChildren();
				sb.append("<" + name + ">");
				if(!list.isEmpty()) {
					sb.append(XMLUtil.getChildrenText(list));
				}
				sb.append(value);
				sb.append("</" + name + ">");
			}
		}
		
		return sb.toString();
	}
	
    /**
     * 微信支付将请求参数转换为xml格式的String
     * 
     * @param parameters
     * @return
     */
    @SuppressWarnings("rawtypes")
    public static String getRequestXmlQuery(SortedMap<String, String> paramMap) {
        StringBuffer sb = new StringBuffer();
        sb.append("<xml>");
        Set set = paramMap.entrySet();
        Iterator it = set.iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String key = (String) entry.getKey();
            String value = (String) entry.getValue();
            sb.append("<" + key + ">" + "<![CDATA[" + value + "]]></" + key + ">");
        }
        sb.append("</xml>");
        return sb.toString();
    }
	
    /**
     * 微信支付将请求参数转换为xml格式的String
     * 
     * @param parameters
     * @return
     */
    @SuppressWarnings("rawtypes")
    public static String getRequestXml(SortedMap<String, String> paramMap) {
        StringBuffer sb = new StringBuffer();
        sb.append("<xml>");
        Set set = paramMap.entrySet();
        Iterator it = set.iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String key = (String) entry.getKey();
            String value = (String) entry.getValue();
            if ("attach".equalsIgnoreCase(key) || "body".equalsIgnoreCase(key) || "sign".equalsIgnoreCase(key)) {
                sb.append("<" + key + ">" + "<![CDATA[" + value + "]]></" + key + ">");
            } else {
                sb.append("<" + key + ">" + value + "</" + key + ">");
            }
        }
        sb.append("</xml>");
        return sb.toString();
    }
	
}