JAVA 常用的xml工具类

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主要分为

1：解析request流对象InputStream 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。

2.解析String类型的xml流对象InputStream
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。

3.获取子结点的xml

用于微信支付通知微信.异步确认成功.必写.不然会一直通知后台.八次之后就认为交易失败了

package com.htht.tourism.utils;import java.io.ByteArrayInputStream;import java.io.IOException;import java.io.InputStream;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 java.util.TreeMap;import javax.servlet.ServletInputStream;import javax.servlet.http.HttpServletRequest;import org.jdom.Document;import org.jdom.Element;import org.jdom.JDOMException;import org.jdom.input.SAXBuilder;/** * xml工具类 * */public final class XMLUtil {    private XMLUtil() {        throw new Error("工具类不能实例化！");    }    /**     * 解析request流对象InputStream 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。     */    @SuppressWarnings("all")    public static Map<String, String> doXMLParse(final HttpServletRequest request) throws JDOMException, IOException {        Map<String, String> m = new HashMap<String, String>();        SAXBuilder builder = new SAXBuilder();        ServletInputStream in = request.getInputStream();        Document doc = builder.build(in);        Element root = doc.getRootElement();        List<Object> list = root.getChildren();        Iterator<Object> 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();        return m;    }    /**     * 解析String类型的xml流对象InputStream     * 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。     */    @SuppressWarnings("all")    public static Map<String, String> doXMLParse(final String strxml) throws JDOMException, IOException {        if (null == strxml || "".equals(strxml)) {            return null;        }        Map<String, String> m = new HashMap<String, String>();        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();        return m;    }    /**     * 获取子结点的xml     */    @SuppressWarnings("all")    private static String getChildrenText(final 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();    }    /**     * 将请求参数转换为xml格式的string     * 通知微信.异步确认成功.必写.不然会一直通知后台.八次之后就认为交易失败了.     *      */    @SuppressWarnings("all")    public static String getRequestXml(final SortedMap<String, String> parameters) {        StringBuffer sb = new StringBuffer();        sb.append("<xml>");        Set es = parameters.entrySet();        Iterator it = es.iterator();        while (it.hasNext()) {            Map.Entry entry = (Map.Entry) it.next();            String k = (String) entry.getKey();            String v = (String) entry.getValue();            if ("attach".equalsIgnoreCase(k) || "body".equalsIgnoreCase(k) || "sign".equalsIgnoreCase(k)) {                sb.append("<" + k + ">" + "<![CDATA[" + v + "]]></" + k + ">");            } else {                sb.append("<" + k + ">" + v + "</" + k + ">");            }        }        sb.append("</xml>");        return sb.toString();    }    /**     * main     */    public static void main(final String[] arg) {        SortedMap<String, String> sm = new TreeMap<String, String>();        sm.put("SUCCESS", "OK");        String ss = getRequestXml(sm);        System.out.println(ss);    }}

main方法输出为:

<xml><SUCCESS>OK</SUCCESS></xml>

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