xmlUtil 解析 创建

http://yangzi09150915.blog.163.com/blog/static/32953487201072911410398/

package com.aibi.cmdc.webService;


import java.io.StringReader;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.stream.StreamResult;


import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import org.xml.sax.InputSource;
import org.xml.sax.helpers.AttributesImpl;


public class XmlUtil {


 /**
  * 取得所有prompts 下prompt及其属性 将其转成list<Map<key,value>>
  * @param xmlDoc
  * @return
  */
 @SuppressWarnings("unchecked")
 public static List<Map<String, String>> getPrompts(String xmlDoc) {
 List<Map<String, String>> list = new ArrayList<Map<String,String>>();
 // 创建一个新的字符串
 StringReader read = new StringReader(xmlDoc);
 // 创建新的输入源SAX 解析器将使用 InputSource 对象来确定如何读取 XML 输入
 InputSource source = new InputSource(read);
 // 创建一个新的SAXBuilder
 SAXBuilder sb = new SAXBuilder();
 try {
 // 通过输入源构造一个Document
 Document doc = sb.build(source);
 // 取的根元素
 Element root = doc.getRootElement();
 // 得到根元素所有子元素的集合
 List<Element> oneLevelNodes = root.getChildren();
 for (int i = 0; i < oneLevelNodes.size(); i++) {
 Element oneLevelNode = oneLevelNodes.get(i);
 if(oneLevelNode.getName().equals("prompts")){
 List<Element> prompts = oneLevelNode.getChildren();
 for (int j = 0; j < prompts.size(); j++) {
 Map<String, String> promptMap = new HashMap<String, String>();
 Element prompt = prompts.get(j);
 List<?> attributes =prompt.getAttributes();
 for (int k = 0; k < attributes.size(); k++) {
 String attribute = attributes.get(k).toString();
 System.out.println( attributes.get(k));
 String[] keyAndvalue = attribute.split(":")[1].trim().replace("]", "").split("=");
 String key = keyAndvalue[0];
 String value = keyAndvalue[1].replaceAll(""", "");
 promptMap.put(key, value);
 }
 list.add(promptMap);
 }
 }
 }
 } catch (Exception e) {
 e.printStackTrace();
 }
 System.out.println(list);
 return list;
 }
 /**
  * list<Map<key,value>> 转换成 prompts xml字符串形式
  * @param prompts
  * @return
  */
 public static String promptsToXmlString(List<Map<String, String>>  prompts){
 String resultXmlString ="";
      try {
// Result resultXml = new StreamResult(new FileOutputStream("d:\person.xml"));
         //用来得到XML字符串形式   
         // 一个字符流，可以用其回收在字符串缓冲区中的输出来构造字符串   
            StringWriter writerStr = new StringWriter();   
            // 构建转换结果树所需的信息。   
            Result resultStr = new StreamResult(writerStr);  
            
      SAXTransformerFactory factory = (SAXTransformerFactory)SAXTransformerFactory.newInstance();  
 TransformerHandler tfHandler = factory.newTransformerHandler();
 
 Transformer transformer = tfHandler.getTransformer();  
 transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); //编码格式是UTF-8  
 transformer.setOutputProperty(OutputKeys.INDENT, "yes"); //换行  
 
// tfHandler.setResult(resultXml);  
 tfHandler.setResult(resultStr);   
 tfHandler.startDocument();
 AttributesImpl attr = new AttributesImpl();  
 tfHandler.startElement("", "", "prompts", attr); //定义person节点  
 for (Map<String, String> map : prompts) {
 attr.clear();
 for(String key : map.keySet()){
 attr.addAttribute("", "", key, "", map.get(key));
 }
 tfHandler.startElement("", "", "prompt", attr); //定义person节点  
 tfHandler.endElement("", "", "prompt");
 }
 tfHandler.endElement("", "", "prompts");
 tfHandler.endDocument(); //结束xml文档  
 resultXmlString = writerStr.getBuffer().toString();   
 } catch (Exception e) {
 e.printStackTrace();
 }  
 return resultXmlString;
 }
 
 public static void main(String[] args) {
 List<Map<String, String>> list = new ArrayList<Map<String,String>>();
 for (int i = 0; i < 5; i++) {
 Map<String, String> map = new HashMap<String, String>();
 map.put("dpId", "DP0");
 map.put("id", String.valueOf((Math.random()*10)));
 map.put("type", "sapVariable");
 map.put("optional", "true");
 map.put("technicalName", "S_CPDLB");
 map.put("name", "产品大类");
 list.add(map);
 }
 String resultXmlString = promptsToXmlString(list);
 System.out.println(resultXmlString);
 
 String xmlString = "<returnResult><errCode>S</errCode><errMsg></errMsg><prompts>" + 
 "<prompt dpId="DP0" id="0" type="sapVariable" optional="true" technicalName="S_CPDLB" name="产品大类" ></prompt>"+
 "<prompt dpId="DP0" id="1" type="sapVariable" optional="true" technicalName="0S_MATGR" name="Material group" ></prompt>"+
 "<prompt dpId="DP0" id="2" type="sapVariable" optional="true" technicalName="0S_MATERIAL" name="Material" ></prompt>"+
 "<prompt dpId="DP0" id="3" type="sapVariable" optional="true" technicalName="0S_SALESORG" name="Sales Organization" ></prompt>"+
 "<prompt dpId="DP0" id="4" type="sapVariable" optional="true" technicalName="S_ZPLTYP" name="渠道细类" ></prompt>"+
 "<prompt dpId="DP0" id="5" type="sapVariable" optional="true" technicalName="0S_CUSTOMER" name="Customer" ></prompt>"+
 "<prompt dpId="DP0" id="6" type="sapVariable" optional="true" technicalName="0I_DAYIN" name="Day Interval" ></prompt>"+
 "<prompt dpId="DP0" id="7" type="sapVariable" optional="true" technicalName="0I_DAY" name="DATE" ></prompt>"+
 "</prompts></returnResult>";
 
 getPrompts(xmlString);
 }
}