原文链接 http://blog.csdn.net/ycyangcai/article/details/6643784
Hl7引擎的目标主要是解决将数据按HL7协议的要求标准化，和标准业务的集成和不同系统间标准业务数据的同步。在多年的医院信息化过程中，HL7标准组织和解析最复杂了，下面是我用了多年HL7引擎解析，主要有两个版本1.C#,2.JAVA版的。
本次公开JAVA的
//引擎类: package com.xxxx.hl7;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.List;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;
//HL7 转换为XML
public class HL7ToXmlConverter {
//
public static String ConvertToXml(String sHL7){
Document document = ConvertToXmlObject(sHL7);
String hl7str = document.asXML();
return hl7str;
}
//
public static String ConvertToXml(Document document){
String hl7str = document.asXML();
return hl7str;
} public static Document ConvertToXmlObject(String sHL7){
Document document = CreateXmlDoc();
//把HL7分成段
String[] sHL7Lines = sHL7.split("\n");
//去掉XML的关键字
for (int i = 0; i < sHL7Lines.length; i++){
sHL7Lines[i] = sHL7Lines[i].replace("^~\\&", "").replace("MSH", "MSH|");
}
for (int i = 0; i < sHL7Lines.length; i++){
// 判断是否空行
if (sHL7Lines[i] != null){
String sHL7Line = sHL7Lines[i];
//通过/r 或/n 回车符分隔
String[] sFields = GetMessgeFields(sHL7Line);
// 为段(一行)创建第一级节点
Element el = document.getRootElement().addElement(sFields[0]);
// 循环每一行
Boolean isMsh=true;
for (int a = 1; a < sFields.length; a++){
//是否包括HL7的连接符^~\\&
if (sFields[a].indexOf('^')>0 || sFields[a].indexOf('~')>0 || sFields[a].indexOf('\\')>0 || sFields[a].indexOf('&')>0 ){
//0:如果这一行有任一分隔符
//开始操作~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//通过~分隔
String[] sComponents = GetRepetitions(sFields[a]);
if (sComponents.length > 1){
//1:如果可以分隔 0001^郭靖^体检号^EQ^AND~0002^东一区^病区号^EQ^AND
for (int b = 0; b < sComponents.length; b++){
// Element fieldEl1 = el.addElement(sFields[0] + "." + a);
CreateComponents(el,sComponents[b],sFields[0],a,b);
}
}
else{
//1:如果真的只有一个值的 0001^郭靖^体检号^EQ^AND
// 为字段创建第二级节点
// Element fieldEl = el.addElement(sFields[0] + "." + a);
CreateComponents(el,sFields[a],sFields[0],a,0);
//fieldEl.setText(sFields[a]+"11111111111111");
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
}
else{
//0:如果这一行没有任何分隔符
// 为字段创建第二级节点
Element fieldEl = el.addElement(sFields[0] + "." + a);
fieldEl.setText(sFields[a]);
}
}
}//end if
}//end for
//修改MSH.1 和 MSH.2的值
document.selectSingleNode("HL7Message/MSH/MSH.1").setText("|");
document.selectSingleNode("HL7Message/MSH/MSH.2").setText("~^\\&");
// document.selectNodes("MSH/MSH.1");
return document;
}
@SuppressWarnings("unused")
private static Element CreateComponents(final Element el,final String hl7Components,String sField,int a,int b){
Element componentEl = el.addElement(sField + "." + a);
// Element componentEl =el;//.addElement(sField + "." + a + "." + b);
//&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
//通过&分隔
String[] subComponents = GetSubComponents(hl7Components);
if (subComponents.length > 1){
//2.如果有字组，一般是没有的。。。 子分组 用&很少用
}
else{
//2.如果没有了，就用^分组
String[] sRepetitions = GetComponents(hl7Components);
if (sRepetitions.length > 1){
Element repetitionEl = null;
for (int c = 0; c < sRepetitions.length; c++){
repetitionEl = componentEl.addElement(sField + "." + a + "." + (c+1));
repetitionEl.setText(sRepetitions[c]);
}
}
else{
componentEl.setText(hl7Components);
}
}
//&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
return el;
} /// <summary>
/// 通过|分隔 字段
/// </summary>
/// <param name="s"></param>
/// <returns></returns> private static String[] GetMessgeFields(String s){
return s.split("\\|");
}
/// <summary>
/// 通过^分隔 组字段
/// </summary>
/// <param name="s"></param>
/// <returns></returns> private static String[] GetComponents(String s){
return s.split("\\^");
}
/// <summary>
/// 通过&分隔 子分组组字段
/// </summary>
/// <param name="s"></param>
/// <returns></returns> private static String[] GetSubComponents(String s){
return s.split("&");
}
/// <summary>
/// 通过~分隔 重复
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
private static String[] GetRepetitions(String s){
return s.split("~");
}
/// <summary>
/// 创建XML对象
/// </summary>
/// <returns></returns>
private static Document CreateXmlDoc(){
Document output = DocumentHelper.createDocument();
//生成一个接点
Element rootNode = output.addElement("HL7Message");
return output;
}
public static String GetText(Document document, String path){
Node node = document.selectSingleNode("HL7Message/"+path);
if (node != null){
return node.getText();
}
else{
return null;
}
}
public static String GetText(Document document, String path,int index){
List nodes = document.selectNodes("HL7Message/"+path);
if(nodes!=null){
return ((Node)nodes.get(index)).getText();
}
else{
return null;
}
} //
public static List GetTexts(Document document, String path){
List nodes = document.selectNodes("HL7Message/"+path);
return nodes;
} //
public static void writeDocument(Document document, String filepath){
try{
//读取文件
// FileWriter fileWriter = new FileWriter(filepath);
Writer writer = new OutputStreamWriter(new FileOutputStream(filepath),"utf-8");
//设置文件编码
OutputFormat xmlFormat = new OutputFormat();
xmlFormat.setEncoding("utf-8");
//创建写文件方法
XMLWriter xmlWriter = new XMLWriter(writer,xmlFormat);
//写入文件
xmlWriter.write(document);
//关闭
xmlWriter.close();
}catch(IOException e){
System.out.println("文件没有找到");
e.printStackTrace();
}
}
}
单元测试调用类：
String myHL7string="MSH|^~\\&|455755610_0100||0200||20110624160404|000|QRY^A19^QRY_A19|0123456001|P|2.6\nQRD|||||||||0001^郭靖^体检号^EQ^AND~0002^东一区^病区号^EQ^AND\nQRF||20110627|20110803";
Document document = HL7ToXmlConverter.ConvertToXmlObject(myHL7string);
//获取事件
String eventName = HL7ToXmlConverter.GetText(document, "MSH/MSH.9/MSH.9.3");
System.out.println("eventName:"+eventName);
// List nodeValue = document.selectNodes("MSH.1");
String nodeValue = document.selectSingleNode("HL7Message/MSH/MSH.1").getText();
String nodeValue2 = document.selectSingleNode("HL7Message/MSH/MSH.3").getText();
// DocumentElement.SelectNodes(path);
System.out.println(nodeValue+":"+nodeValue2);
String value = HL7ToXmlConverter.GetText(document, "QRD/QRD.9/QRD.9.1",0);
String value1 = HL7ToXmlConverter.GetText(document, "QRD/QRD.9/QRD.9.1",1);
String value2 = HL7ToXmlConverter.GetText(document, "QRD/QRD.9/QRD.9.1");
System.out.println(value+":"+value1+":"+value2);
List<Node> list = HL7ToXmlConverter.GetTexts(document, "QRD/QRD.9/QRD.9.1");
for(Node node : list)
{
System.out.println(":"+node.getText());
}
System.out.println(HL7ToXmlConverter.ConvertToXml(myHL7string));