我坚持如何继续组合两个不同的XML文件(具有相同的结构)。当我对它进行一些研究时,人们会说必须使用像DOM或StAX这样的XML解析器。但我不能用常规IOStream做到这一点?我目前正试图在IOStream的帮助下做,但这不是解决我的目的,它更复杂。
例如,我尝试的是;
public class GUI {
public static void main(String[] args) throws Exception {
// Creates file to write to
Writer output = null;
output = new BufferedWriter(new FileWriter("C:\\merged.xml"));
String newline = System.getProperty("line.separator");
output.write("");
// Read in xml file 1
FileInputStream in = new FileInputStream("C:\\1.xml");
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
while ((strLine = br.readLine()) != null) {
if (strLine.contains("<MemoryDump>")){
strLine = strLine.replace("<MemoryDump>", "xmlns:xsi");
}
if (strLine.contains("</MemoryDump>")){
strLine = strLine.replace("</MemoryDump>", "xmlns:xsd");
}
output.write(newline);
output.write(strLine);
System.out.println(strLine);
}
// Read in xml file 2
FileInputStream in = new FileInputStream("C:\\2.xml");
BufferedReader br1 = new BufferedReader(new InputStreamReader(in));
String strLine1;
while ((strLine1 = br1.readLine()) != null) {
if (strLine1.contains("<MemoryDump>")){
strLine1 = strLine1.replace("<MemoryDump>", "");
}
if (strLine1.contains("</MemoryDump>")){
strLine1 = strLine1.replace("</MemoryDump>", "");
}
output.write(newline);
output.write(strLine1);
我请您通过添加其他内容告诉我如何继续合并两个XML文件。如果您能为我提供一些示例链接,那将是很棒的。!
提前谢谢你..! 的System.out.println(strLine1); }
}
答案 0 :(得分:1)
不完全确定您要做什么。通过合并你的意思是:
一个。您想要合并2个DOM的内容,并提出一个带有附加节点的对象模型(有效的)
湾您希望一个接一个地合并这两个文件,而不关心实际内容
如果是a,请使用XML解析器。当然你可以手工编写这个东西并尝试将流处理成dom对象,但是你将重写那些解析器的大部分内容。为什么要重写已存在的东西。
如果是b,那就做一个愚蠢的副本。复制第一个文件(再次使用实用程序,例如apache common的FileUtil允许你复制文件。除非必要,不要写),打开复制文件的IO流,然后读取和写入第二个文件。
答案 1 :(得分:1)
作为一般规则,永远不要在词法层面上进行任何XML处理:始终使用XML解析器。 (如果(a)您是XML专家,那么您可以违反此规则,因此您知道可能出现的问题,并且(b)您知道结果不一定是正确的。)
其次,执行此类处理的最简单方法是使用为作业设计的语言,如XSLT或XQuery。使用Java使它非常适合猪油。
如果您对要合并的文件类型以及您希望输出的外观更具体,我们可以为您提供更准确的答案。
答案 2 :(得分:0)
package com.cts.sterling.order;
//package com.academy.ecommerce.sterling.userexits;
import java.io.File;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import com.cts.sterling.custom.accelerators.util.XMLUtil;
public class MergeXml {
public static Document mergeXml(Document doc1, Document doc2)
throws Exception {
// Getting the attributes of OrderLine from document2 and document1
NodeList objOrderLineList2 = doc2.getElementsByTagName("OrderLine");
NodeList objOrderLineList1 = doc1.getElementsByTagName("OrderLine");
// Creating Element for OrderLine
Element eleOrderline2 = (Element) objOrderLineList2.item(0);
Element eleOrderline1 = (Element) objOrderLineList1.item(0);
// Declaring attributes as String array
String[] Line1={"LineType","LevelOfService"};
// Copying attributes from document2 to document1
XMLUtil.copyAttributes(eleOrderline2, eleOrderline1, Line1);
// Getting the attributes of Extn from document2 and document1
NodeList objExtn2 = doc2.getElementsByTagName("Extn");
NodeList objExtn1 =doc1.getElementsByTagName("Extn");
// Creating Element for Extn
Element eleExtn2 = (Element) objExtn2.item(0);
Element eleExtn1 = (Element) objExtn1.item(0);
// Declaring attributes as String array
String[] Line2={"ExtnMediaCode","ExtnLastName","ExtnGroupID"};
// Copying attributes from document2 to document1
XMLUtil.copyAttributes(eleExtn2, eleExtn1, Line2);
// Getting the attributes of WSIAddnlOrderLineData from document2 and document1
NodeList objAddln2 = doc2.getElementsByTagName("WSIAddnlOrderLineData");
NodeList objAddln1 =doc1.getElementsByTagName("WSIAddnlOrderLineData");
// Creating Element for WSIAddnlOrderLineData
Element eleAddln2 = (Element) objAddln2.item(0);
Element eleAddln1 = (Element) objAddln1.item(0);
// Declaring attributes as String array
String[] Line3 ={"ExtnShipMode" , "ExtnDeliverTogether","ExtnComponentReplacementIndicator","ExtnGiftCardRequiredIndicator","ExtnReplOriginalItemID",
"ExtnSpecialHandlingIndicator","ExtnSpecialHandlingReasonCode","ExtnCardType","ExtnCardClass","ExtnEcomSuborderNo","ExtnEcomOrderLineNo",
"ExtnPFSFlag","ExtnSVCCarrierServiceCode","ExtnSVCSCAC","ExtnSVCUpgradeFlag","ExtnSVCSKUType","ExtnSVCTo","ExtnSVCFrom"};
// Copying attributes from document2 to document1
XMLUtil.copyAttributes(eleAddln2, eleAddln1, Line3);
// Getting the attributes of Instruction from document2 and document1
NodeList objInst2 = doc2.getElementsByTagName("Instruction");
NodeList objInst1 =doc1.getElementsByTagName("Instruction");
// Creating Element for Instruction
Element eleInst2 = (Element) objInst2.item(0);
Element eleInst1 = (Element) objInst1.item(0);
// Declaring attributes as String array
String[] Line4 ={"InstructionText","InstructionType","SequenceNo","InstructionURL","InstructionUsage"};
// Copying attributes from document2 to document1
XMLUtil.copyAttributes(eleInst2, eleInst1, Line4);
//Printing output document
System.out.println(XMLUtil.getString(doc1));
return doc1;
}
//Main method
public static void main(String[] args) {
try{
File file1 = new File("D:/Handson/merge1.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc1 = dBuilder.parse(file1);
File file2 = new File("D:/Handson/merge2.xml");
Document doc2 = dBuilder.parse(file2);
//calling the method
mergeXml(doc1,doc2);
}
catch (Exception e) {
e.printStackTrace();
}
}
}