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
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;
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));
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