Dom4j 解析XML文檔

最近同學問我一個問題關於gz壓縮文件解析XML文檔，然後就自己研究了一下性能最好的Dom4j，記錄一下測試的過程。

XML文檔示例：

<?xml version="1.0" encoding="utf-8" ?>
<order>
  <orderitems>
    <orderitem>
      <ID>aaa0784004100611500511</ID>
      <YPBH>0041006</YPBH>
      <YP>aaa07840041006</YP>
      <YPMC>複方氨酚葡鋅片(康必得)</YPMC>
      <YPDM>FFAFPXPKBD</YPDM>
      <GG>12s*600</GG>
      <CDMC>河北恆利集團製藥股份有限公司</CDMC>
      <CDDM>HBHLJTZYGFYXGS</CDDM>
      <PH>1150051</PH>
      <PCH>1</PCH>
      <YXQ>2016-12</YXQ>
      <SL>30</SL>
      <BZ>600</BZ>
      <ZBZ>30</ZBZ>
      <DW>盒</DW>
      <DJ>4.5000</DJ>
      <LSJ>6.7000</LSJ>
      <PZWH>H20003806</PZWH>
      <JX>片劑</JX>
      <ISRETAIL>1</ISRETAIL>
    </orderitem>
	<orderitem>
      <ID>aaa002201560151409061</ID>
      <YPBH>0156015</YPBH>
      <YP>aaa00220156015</YP>
      <YPMC>法莫替丁片</YPMC>
      <YPDM>FMTDP</YPDM>
      <GG>20mg*24s</GG>
      <CDMC>湖南迪諾製藥有限公司</CDMC>
      <CDDM>HNDNZYYXGS</CDDM>
      <PH>140906</PH>
      <PCH>1</PCH>
      <YXQ>2016-08</YXQ>
      <SL>10</SL>
      <BZ>600</BZ>
      <ZBZ>10</ZBZ>
      <DW>盒</DW>
      <DJ>2.9800</DJ>
      <LSJ>6.9000</LSJ>
      <PZWH>H43020667</PZWH>
      <JX>片劑</JX>
      <ISRETAIL>1</ISRETAIL>
	</orderitem>
  </orderitems>
</order>

下面是Dom4j解析xml文件的代碼，很簡單：

package com.util.execute;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import java.io.File;
import java.util.Iterator;

/**
 * @author zhaoj
 * @version OpenApiTest.java, v 0.1 2019-04-15 19:26
 */
public class OpenApiTest {
    public static void main(String[] args) {
        try {
            File inputFile = new File("E:\\myjava\\test.xml");
            SAXReader reader = new SAXReader();
            Document document = reader.read(inputFile);
            //方法一
            Element order = document.getRootElement();
            for (Iterator i = order.elementIterator(); i.hasNext(); ) {
                Element orderItems = (Element) i.next();
                for (Iterator j = orderItems.elementIterator(); j.hasNext(); ) {
                    Element orderItem = (Element) j.next();
                    for (Iterator k = orderItem.elementIterator(); k.hasNext(); ) {
                        Element item = (Element) k.next();
                        System.out.println(item.getName() + ":" + item.getText());
                    }
                    System.out.println("----------------------------------------------");
                }

            }
//方法二
 List<Node> nodes = document.selectNodes("/order/orderitems/orderitem");
            for (Node node : nodes) {
                System.out.println("標籤名=:" + node.getName());
                System.out.println("ID:" + node.selectSingleNode("ID").getText());
                System.out.println("YPBH:" + node.selectSingleNode("YPBH").getText());
                System.out.println("YP:" + node.selectSingleNode("YP").getText());
            }

        } catch (Exception e) {
            e.printStackTrace();
        }

    }
}

測試結果如下：

ID:aaa0784004100611500511
YPBH:0041006
YP:aaa07840041006
YPMC:複方氨酚葡鋅片(康必得)
YPDM:FFAFPXPKBD
GG:12s*600
CDMC:河北恆利集團製藥股份有限公司
CDDM:HBHLJTZYGFYXGS
PH:1150051
PCH:1
YXQ:2016-12
SL:30
BZ:600
ZBZ:30
DW:盒
DJ:4.5000
LSJ:6.7000
PZWH:H20003806
JX:片劑
ISRETAIL:1
--------------------------------------------------------------------
ID:aaa002201560151409061
YPBH:0156015
YP:aaa00220156015
YPMC:法莫替丁片
YPDM:FMTDP
GG:20mg*24s
CDMC:湖南迪諾製藥有限公司
CDDM:HNDNZYYXGS
PH:140906
PCH:1
YXQ:2016-08
SL:10
BZ:600
ZBZ:10
DW:盒
DJ:2.9800
LSJ:6.9000
PZWH:H43020667
JX:片劑
ISRETAIL:1



標籤名=:orderitem
ID:aaa0784004100611500511
YPBH:0041006
YP:aaa07840041006
標籤名=:orderitem
ID:aaa002201560151409061
YPBH:0156015
YP:aaa00220156015

其中從根元素開始，尋找到自己需要獲得的節點，然後進行遍歷取值。

需要引入的pom文件：

<!--Spring自帶的也有-->
   <dependency>
     <groupId>dom4j</groupId>
     <artifactId>dom4j</artifactId>
     <version>1.6.1</version>
     <scope>test</scope>
   </dependency>
<!--Spring自帶的-->
   <dependency>
	<groupId>jaxen</groupId>
	<artifactId>jaxen</artifactId>
  </dependency>