想將一個web專案轉成Maven專案，在lib資料夾下，jar包較多的時候，就需要高效快速的生成其對應依賴來完成快速開發。那麼你就來對地方了。 話不多說，直接上乾貨。

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 檔案的 lib路徑
       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");
  // 設定代理
  // 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;
 }
}

 

最後其所生成的依賴都列印在控制檯。只需要將其複製到maven專案下的POM.xml檔案中; 執行過程中可能會出現報錯，原因及解決辦法： 1.maven庫裡面找不到相應的jar包； 2.可在lib下將已生成的jar 刪除再試。 https://my.oschina.net/zhhzhfya/blog/735050 （源文章連結）