根据已有项目下lib包里jar文件生成maven的pom.xml 里面所有依赖

想将一个web项目转成Maven项目，在lib文件夹下，jar包较多的时候，就需要高效快速的生成其对应依赖来完成快速开发。那么你就来对地方了。
话不多说，直接上干货。

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代码如下：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;import org.dom4j.Element;import org.dom4j.dom.DOMElement;import org.jsoup.Jsoup;import com.alibaba.fastjson.JSONObject;public class MakePomFromJars {    public static void main(String[] args) throws FileNotFoundException, IOException {       Element dependencys = new DOMElement("dependencys");       File dir = new File("D:/pathform/WebRoot/WEB-INF/lib");        //需生成pom.xml 文件的 lib路径       for (File jar : dir.listFiles()) {            JarInputStream jis = new JarInputStream(new FileInputStream(jar));            Manifest mainmanifest = jis.getManifest();            jis.close();           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");  // 设置代理  // System.setProperty("http.proxyHost", "127.0.0.1");  // System.setProperty("http.proxyPort", "8090");  try {   String url = "http://search.maven.org/solrsearch/select?q=a%3A%22" + key + "%22%20AND%20v%3A%22" + ver + "%22&rows=3&wt=json";   org.jsoup.nodes.Document doc = Jsoup.connect(url).ignoreContentType(true).timeout(30000).get();   String elem = doc.body().text();   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");    groupId.addText(docJson.getString("g"));    artifactId.addText(docJson.getString("a"));    version.addText(docJson.getString("v"));    dependency.add(groupId);    dependency.add(artifactId);    dependency.add(version);   }  } catch (Exception e) {   e.printStackTrace();  }  return dependency; }}

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最后其所生成的依赖都打印在控制台。只需要将其复制到maven项目下的POM.xml文件中;
*运行过程中可能会出现报错，原因及解决办法：
1.maven库里面找不到相应的jar包；
2.可在lib下将已生成的jar 删除再试。*
https://my.oschina.net/zhhzhfya/blog/735050
（源文章链接）