尝试使用 .replace() 替换使用 XPATH java 提取的 XML 依赖项

Question

我有一个 pom xml 和 pom-web xml。我试图通过使用 Xpath 将依赖项提取到变量中并尝试在 pom.xml 文件中执行 .replace 来将依赖项从 pom-web 复制到 pom.xml变量。但我无法通过变量替换内容，因为 .contains() 的 if 条件为 false。下面的任何帮助都是我使用的代码

pom.xml

<project>
    <dependencies>
        <dependency>
            <groupId>com.test.tm</groupId>
            <artifactId>gameJdk</artifactId>
            <version>1.0.0.1</version>
        </dependency>
        <!-- For Compress JS -->
        <dependency>
            <groupId>com.yahoo.platform.yui</groupId>
            <artifactId>yuicompressor</artifactId>
            <version>2.4.7</version>
        </dependency>
        <dependency>
            <groupId>com.sybase</groupId>
            <artifactId>EccpressoFIPSJca</artifactId>
            <version>7.0</version>
        </dependency>

        <dependency>
            <groupId>com.sybase</groupId>
            <artifactId>EccpressoFIPS</artifactId>
            <version>7.0</version>
        </dependency>
        <dependency>
            <groupId>xerces</groupId>
            <artifactId>xercesImpl</artifactId>
            <version>2.12.0</version>
        </dependency>
    </dependencies>
</project>

pom-web.xml

<project>
    <dependencies>
        <dependency>
            <groupId>com</groupId>
            <artifactId>passwordsdk</artifactId>
            <version>3.4.1</version>
        </dependency>
        <!-- For Compress JS -->
        <dependency>
            <groupId>com.yahoo.platform.yui</groupId>
            <artifactId>yuicompressor</artifactId>
            <version>2.4.7</version>
        </dependency>
        <dependency>
            <groupId>com.sybase</groupId>
            <artifactId>EccpressoFIPSJca</artifactId>
            <version>7.0</version>
        </dependency>

        <dependency>
            <groupId>com.data</groupId>
            <artifactId>EccpressoFIPS</artifactId>
            <version>7.0</version>
        </dependency>
        <dependency>
            <groupId>tesdt</groupId>
            <artifactId>xercesImpl</artifactId>
            <version>2.12.0</version>
        </dependency>
    </dependencies>
</project>

替换后的预期 pom.xml 输出：

<project>
    <dependencies>
        <dependency>
            <groupId>com</groupId>
            <artifactId>passwordsdk</artifactId>
            <version>3.4.1</version>
        </dependency>
        <!-- For Compress JS -->
        <dependency>
            <groupId>com.yahoo.platform.yui</groupId>
            <artifactId>yuicompressor</artifactId>
            <version>2.4.7</version>
        </dependency>
        <dependency>
            <groupId>com.sybase</groupId>
            <artifactId>EccpressoFIPSJca</artifactId>
            <version>7.0</version>
        </dependency>

        <dependency>
            <groupId>com.data</groupId>
            <artifactId>EccpressoFIPS</artifactId>
            <version>7.0</version>
        </dependency>
        <dependency>
            <groupId>tesdt</groupId>
            <artifactId>xercesImpl</artifactId>
            <version>2.12.0</version>
        </dependency>
    </dependencies>
</project>

我使用 xpath 提取依赖关系的代码

import java.io.StringWriter;
import java.nio.file.Files;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.slf4j.Logger;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;
public static void main (String args[]){
        





 Path c1=Paths.get(prop.getProperty("testPom"));
            Path c2=Paths.get(prop.getProperty("testPomweb"));
            //String pom = readFile(CfoServerModifications.class.getResourceAsStream(prop.getProperty("testPom")));
            //String web = readFile(CfoServerModifications.class.getResourceAsStream(prop.getProperty("testPomweb")));            
            String pomFile = new String(Files.readAllBytes(c1),StandardCharsets.UTF_8);
            String pomWeb = new String(Files.readAllBytes(c2),StandardCharsets.UTF_8);
            Document doc_web = Jsoup.parse(pomWeb,"",Parser.xmlParser());
            Document doc_pom = Jsoup.parse(pomFile,"",Parser.xmlParser());
            doc_pom.outputSettings().prettyPrint(false);
            doc_web.outputSettings().prettyPrint(false);
           // System.out.println(doc_pom.outputSettings().prettyPrint(false));
            Elements dependencies_web = doc_web.select("project>dependencies");
            Elements dependencies_pom = doc_pom.select("project>dependencies");
            //log.info(dependencies_web.toString());
            // remove the old dependencies
            dependencies_pom.clear();
            //log.info("pom clear"+dependencies_pom.toString());
            //add the new dependencies
            dependencies_pom.addAll(dependencies_web);
            //log.info("pom web added to pom "+dependencies_pom.toString());
           
            Files.write(Paths.get(prop.getProperty("dummyfile")),doc_pom.toString().getBytes());

Answer 1

我推荐你使用Jsoup，它可以轻松解析xml，而不是重新发明轮子。

将每个 xml 文件读入内存，从一个 xml 复制依赖项节点并用另一个替换它们。

这是一个工作示例：

package replacexmlnode;

import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.parser.Parser;
import org.jsoup.select.Elements;


public class ReplaceXmlNode {
    
  public static void main(String[] args) throws IOException {
    
    String pom = readFile(ReplaceNode.class.getResourceAsStream("pom-plain.xml"));
    String web = readFile(ReplaceNode.class.getResourceAsStream("pom-web.xml"));
    
    Document doc_web = Jsoup.parse(web,"",Parser.xmlParser());
    Document doc_pom = Jsoup.parse(pom,"",Parser.xmlParser());
    
    Elements dependencies_web = doc_web.select("project>dependencies");

    //remove old dependencies        
    doc_pom.select("project>dependencies").remove();

    // add new dependencies
    doc_pom.select("project").first().appendChild(dependencies_web.first());       
    
    doc_pom.outputSettings().prettyPrint(false);
    Files.write(Paths.get("pom-plain_out.xml"), doc_pom.toString().getBytes());
 }

  public static String readFile(InputStream in) throws IOException{
   
    return new String(in.readAllBytes(), StandardCharsets.UTF_8);
 }
}

如果你使用 maven 从获取 Jsoup 依赖 maven central

尝试使用 .replace() 替换使用 XPATH java 提取的 XML 依赖项

Trying to use .replace() to replace XML dependencies extracted by using XPATH java

java

xpath

replace

contains

xml-parsing