读取jar文件的sha1码，请求maven官方的solrsearch接口查询该jar文件所对应的maven坐标信息

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import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import org.apache.commons.io.IOUtils;

import java.io.*;
import java.net.URL;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.HashMap;
import java.util.Map;

/**
 * 读取jar文件的sha1码，请求maven官方的solrsearch接口查询该jar文件所对应的maven坐标信息
 * Created by Nihaorz on 2017/4/20.
 */
public class MakeMavenInfo {

    public static void main(String[] args) throws IOException, NoSuchAlgorithmException {
        long start = System.currentTimeMillis();
        File dir = new File("C:\Users\Administrator\Desktop\jars");
        for (File jar : dir.listFiles()) {
            String sha1 = getSha1ByFile(jar);
            Map<String, String> map = getMavenInfoBySha1(jar, sha1);
            System.out.println(map);
        }
        long end = System.currentTimeMillis();
        System.out.println("耗时:" + (end-start)/1000 + "秒");
    }

    /**
     * 根据jar包输入流获取该文件的sha1码
     * @param file
     * @return
     * @throws IOException
     * @throws NoSuchAlgorithmException
     */
    public static String getSha1ByFile(File file) throws IOException, NoSuchAlgorithmException {
        MessageDigest sha1 = MessageDigest.getInstance("SHA1");
        FileInputStream fis = new FileInputStream(file);
        byte[] data = new byte[1024];
        int read;
        while ((read = fis.read(data)) != -1) {
            sha1.update(data, 0, read);
        }
        byte[] hashBytes = sha1.digest();
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < hashBytes.length; i++) {
            sb.append(Integer.toString((hashBytes[i] & 0xff) + 0x100, 16).substring(1));
        }
        return sb.toString();
    }

    /**
     * 根据sha1码请求接口拿到该jar包对应的maven坐标信息
     * @param jar
     * @param sha1
     * @return
     */
    public static Map<String, String> getMavenInfoBySha1(File jar, String sha1){
        Map<String, String> map = new HashMap<String, String>();
        String url = "http://search.maven.org/solrsearch/select?q=1:"";
        StringBuilder sb = new StringBuilder();
        sb.append(url).append(sha1).append(""&rows=20&wt=json");
        map.put("jarName", jar.getName());
        try {
            String jsonStr = IOUtils.toString(new URL(sb.toString()));
            JsonObject json = new JsonParser().parse(jsonStr).getAsJsonObject();
            JsonObject obj = json.getAsJsonObject("response").getAsJsonArray("docs").get(0).getAsJsonObject();
            map.put("groupId", obj.get("g").getAsString());
            map.put("artifactId", obj.get("a").getAsString());
            map.put("version", obj.get("v").getAsString());
            map.put("packaging", obj.get("p").getAsString());
            map.put("result", "true");
        } catch (Exception e) {
            e.printStackTrace();
            map.put("result", "false");
            System.out.println(sb);
        }
        return map;
    }

}

参考：　　http://www.sha1-online.com/sha1-java/

　　　　　http://search.maven.org/#api