根据jar生成pom-蒲公英云

看了网上不少根据lib下的jar自动生成pom.xml中的依赖的文章,发现其实并不理想, 基本上就是获取jar中的信息替你去查询下网上,解析返回值,把可能的groupId,version等信息拼接一下。还是需要人工识别修改下，不过总比从头开始方便一点。下面具体解析一个例子：

人工根据jar相关信息去maven仓库查询，分析网络交互方式
https://search.maven.org/solrsearch/select?q=g:junit%20AND%20v:4.11&start=0&rows=3
在这里插入图片描述

代码模拟人工查询并拼接依赖xml

import com.alibaba.fastjson.JSONObject;
import org.dom4j.Element;
import org.dom4j.dom.DOMElement;
import org.jsoup.Jsoup;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.jar.JarInputStream;
import java.util.jar.Manifest;
public class MakePomFromJars {
    public static void main(String[] args) throws FileNotFoundException, IOException {
        Element dependencys = new DOMElement("dependencys");
        File dir = new File("D:\\IdeaProjects\\SQLParse-master\\lib");
        for (File jar : dir.listFiles()) {
            JarInputStream jis = new JarInputStream(new FileInputStream(jar));
            Manifest mainmanifest = jis.getManifest();
            jis.close();
            if (mainmanifest == null) {
                //System.err.println(jar.getName());
                continue;
            }
            String bundleName = mainmanifest.getMainAttributes().getValue("Bundle-Name");
            String bundleVersion = mainmanifest.getMainAttributes().getValue("Bundle-Version");
            Element ele = null;
            //System.out.println(jar.getName());
            StringBuffer sb = new StringBuffer(jar.getName());
            if (bundleName != null) {
                bundleName = bundleName.toLowerCase().replace(" ", "-");
                sb.append(bundleName+"\t").append(bundleVersion);
                ele = getDependices(bundleName, bundleVersion);
                //System.out.println(sb.toString());
                System.out.println(ele.asXML());
            }
            if (ele == null || ele.elements().size() == 0) {
                bundleName = "";
                bundleVersion = "";
                String[] ns = jar.getName().replace(".jar", "").split("-");
                for (String s : ns) {
                    if (Character.isDigit(s.charAt(0))) {
                        bundleVersion += s + "-";
                    } else {
                        bundleName += s + "-";
                    }
                }
                if (bundleVersion.endsWith("-")) {
                    bundleVersion = bundleVersion.substring(0, bundleVersion.length() - 1);
                }
                if (bundleName.endsWith("-")) {
                    bundleName = bundleName.substring(0, bundleName.length() - 1);
                }
                ele = getDependices(bundleName, bundleVersion);
                sb.setLength(0);
                sb.append(bundleName+"\t").append(bundleVersion);
                //System.out.println(sb.toString());
                System.out.println(ele.asXML());
            }
            ele = getDependices(bundleName, bundleVersion);
            if (ele.elements().size() == 0) {
                ele.add(new DOMElement("groupId").addText("not find"));
                ele.add(new DOMElement("artifactId").addText(bundleName));
                ele.add(new DOMElement("version").addText(bundleVersion));
            }
            dependencys.add(ele);
            System.out.println();
        }
        System.out.println(dependencys.asXML());
    }
    public static Element getDependices(String key, String ver) {
        Element dependency = new DOMElement("dependency");
        // System.setProperty("http.proxyHost", "127.0.0.1");
        // System.setProperty("http.proxyPort", "8090");
        try {
        // https://search.maven.org/solrsearch/select?q=g:junit%20AND%20v:4.11&start=0&rows=3
        //String url = "http://search.maven.org/solrsearch/select?q=a%3A%22" + key + "%22%20AND%20v%3A%22" + ver + "%22&rows=3&wt=json";
            //https://search.maven.org/solrsearch/select?q=apache-log4j-extras&v=1.2.17
            String url = "http://search.maven.org/solrsearch/select?q=" + key + "&v=" + ver + "&rows=3&wt=json";
            org.jsoup.nodes.Document doc = Jsoup.connect(url).ignoreContentType(true).timeout(30000).get();
            String elem = doc.body().text();
//            System.out.println(elem);
            JSONObject response = JSONObject.parseObject(elem).getJSONObject("response");
            if (response.containsKey("docs") && response.getJSONArray("docs").size() > 0) {
                JSONObject docJson = response.getJSONArray("docs").getJSONObject(0);
                Element groupId = new DOMElement("groupId");
                Element artifactId = new DOMElement("artifactId");
                Element version = new DOMElement("version");
                Element latestVersion = new DOMElement("latestVersion");
                groupId.addText(docJson.getString("g"));
                artifactId.addText(docJson.getString("a"));
                version.addText(ver);
                latestVersion.addText(docJson.getString("latestVersion"));
                dependency.add(groupId);
                dependency.add(artifactId);
                dependency.add(version);
                //dependency.add(latestVersion);
            }
            //查找不到jar
            else {
                Element groupId = new DOMElement("groupId");
                Element artifactId = new DOMElement("artifactId");
                Element version = new DOMElement("version");
                groupId.addText("com.aj.external");
                artifactId.addText(key);
                version.addText("1.0.0" );
                dependency.add(groupId);
                dependency.add(artifactId);
                dependency.add(version);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dependency;
    }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.example</groupId>
    <artifactId>createPom</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <maven.compiler.source>11</maven.compiler.source>
        <maven.compiler.target>11</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.10.2</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.80</version>
        </dependency>
    </dependencies>
</project>