JAVA 常用的xml工具类

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>