通过代码在maven私服下载jar包有两种方式，一种是为通过URI链接直接下载，另一种是通过 # 利用aether api实现从指定maven仓库下载jar包
第一种http请求方式：
@Slf4j
@Data
public class HttpJarDownloader {
private static final String CENTRAL_STORE = "http://artifactory.xx.com/libs-releases/";
private static final String SNAPSHOTS = "http://artifactory.xx.com/libs-snapshots/";
private static final String JAR_FILE_EXT_NAME = "-sources.jar";
private static final String URL_SPLIT = "/";
private static final String FILE_NAME_SPLIT = "-";
/**
* jar包下载目录
*
* @return
*/
private static String getBasePath() {
return "/Users/xxx/soft/jar";
}
/**
* 检测远程jar是否存在
*
* @param location
* @return
*/
public static boolean checkExistedRemoteJar(MavenJarLocation location) {
return readRemotePath(location);
}
/**
* 检测本地jar是否存在
*
* @param location
* @return
*/
public static boolean checkExistedLocalJar(MavenJarLocation location) {
return getMavenLocalFile(location) != null;
}
/**
* 下载源码包优先查询本地、本地没有则查询远程
*
* @param location
* @return
*/
private static File downloadSourceJar(MavenJarLocation location) {
File f = getMavenLocalFile(location);
if (f != null) {
log.info(">>>>>>>>>from local file>>>>>>>>" + f.getPath());
log.info("download result form local file = {}", f.getPath());
return f;
}
String filePath = downloadRemote(location);
if (filePath != null) {
return new File(filePath);
}
return null;
}
/**
* 远程下载jar包或pom
*
* @return source jar下载到本地的路径
*/
private static String downloadRemote(MavenJarLocation location) {
String url = getMavenRemoteUrl(location);
String fileName = getSourceJarFileName(location);
log.info("center url : {}", url);
String path = null;
try {
path = downLoadFromUrl(url, fileName, getBasePath());
} catch (IOException e) {
log.error("jar-pom location : {}, url : {}", location, url);
log.error("maven download jar or pom file error", e);
}
return path;
}
/**
* 获取本地 File
*
* @param location
* @return
*/
private static File getMavenLocalFile(MavenJarLocation location) {
String url = getMavenLocalUrl(location);
File f = new File(url);
if (f.exists()) {
if (!isSnapShot(location)) {
return f;
}
//如果是大于1分钟则删除TODO 待定
if (System.currentTimeMillis() - f.lastModified() > 1 * 60 * 1000) {
f.delete();
} else {
return f;
}
}
return null;
}
/**
* 访问远程jar
*
* @param location
* @return
*/
private static boolean readRemotePath(MavenJarLocation location) {
String url = getMavenRemoteUrl(location);
log.info("center url : {}", url);
Integer responseCode = null;
try {
responseCode = readFromUrl(url);
} catch (IOException e) {
log.error("readRemotePath location : {}, url : {}", location, url);
log.error("readRemotePath error", e);
}
return Objects.equals(responseCode, 200);
}
/**
* 获得maven远程url
*
* @param location
* @return
*/
private static String getMavenRemoteUrl(MavenJarLocation location) {
String domain = CENTRAL_STORE;
if (isSnapShot(location)) {
domain = SNAPSHOTS;
}
return domain + getLocationPath(location) + getSourceJarFileName(location);
}
/**
* 获得maven本地url+artifactId+version+fileName
*
* @param location
* @return
*/
private static String getMavenLocalUrl(MavenJarLocation location) {
String domain = CENTRAL_STORE;
if (isSnapShot(location)) {
domain = SNAPSHOTS;
}
return getBasePath() + location.getArtifactId() + File.separator + location.getVersion() + File.separator + (getSourceJarFileName(location));
}
/**
* maven私服上jar包路径
*
* @param location
* @return
*/
private static String getLocationPath(MavenJarLocation location) {
return location.getGroupId().replace(".", "/") + URL_SPLIT + location.getArtifactId() + URL_SPLIT
+ location.getVersion() + URL_SPLIT;
}
/**
* 拼接jar包文件名
* 例：jcf-1.3.9.8-SNAPSHOT.sources.jar
*
* @param location
* @return
*/
private static String getSourceJarFileName(MavenJarLocation location) {
return location.getArtifactId() + FILE_NAME_SPLIT + location.getVersion() + JAR_FILE_EXT_NAME;
}
/**
* 是否是快照
*
* @param location
* @return
*/
private static boolean isSnapShot(MavenJarLocation location) {
if (StringUtils.containsIgnoreCase(location.getVersion(), "SNAPSHOT")) {
return true;
}
return false;
}
/**
* 从网络Url中下载文件
*
* @param urlStr
* @param fileName
* @param savePath
* @throws IOException
*/
private static String downLoadFromUrl(String urlStr, String fileName, String savePath) throws IOException {
URL url = new URL(urlStr);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//设置超时间为3秒
conn.setConnectTimeout(3 * 1000);
//得到输入流
InputStream inputStream = null;
try {
inputStream = conn.getInputStream();
} catch (FileNotFoundException e) {
log.error("file.err_download_file", e);
throw StdException.adapt(e);
}
//获取自己数组
byte[] getData = readInputStream(inputStream);
//文件保存位置
File saveDir = new File(savePath);
if (!saveDir.exists()) {
saveDir.mkdir();
}
File file = new File(saveDir + File.separator + fileName);
FileOutputStream fos = new FileOutputStream(file);
fos.write(getData);
if (fos != null) {
fos.close();
}
if (inputStream != null) {
inputStream.close();
}
return file.getPath();
}
/**
* 判断网络Url中
*
* @param urlStr
* @throws IOException
*/
private static Integer readFromUrl(String urlStr) throws IOException {
Integer responseCode = 0;
//得到输入流
try {
URL url = new URL(urlStr);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//设置超时间为3秒
conn.setConnectTimeout(3 * 1000);
conn.setReadTimeout(3 * 1000);
responseCode = conn.getResponseCode();
} catch (FileNotFoundException e) {
log.error("url is error >>>>>>>>>{}", urlStr);
throw new IOException(e);
}
return responseCode;
}
/**
* 从输入流中获取字节数组
*
* @param inputStream
* @return
* @throws IOException
*/
public static byte[] readInputStream(InputStream inputStream) throws IOException {
byte[] buffer = new byte[1024];
int len = 0;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
while ((len = inputStream.read(buffer)) != -1) {
bos.write(buffer, 0, len);
}
bos.close();
return bos.toByteArray();
}
public static void main(String[] args) {
try {
MavenJarLocation location = new MavenJarLocation();
location.setGroupId("com.jc");
location.setArtifactId("qdox-explore-service");
location.setVersion("1.0.0-SNAPSHOT");
File file = downloadSourceJar(location);
JarUtils.unzipJar(file, file.getParentFile());
int i = 0;
} catch (Exception e) {
log.error("HttpJarDownloader.main Exception ",e);
}
}
}
利用aether api实现从指定maven仓库下载jar包
@Slf4j
public class AetherJarDownloader {
/**
* create a repository system session
* @param system RepositorySystem
* @return RepositorySystemSession
*/
private static RepositorySystemSession newSession( RepositorySystem system,String target )
{
DefaultRepositorySystemSession session = MavenRepositorySystemUtils.newSession();
session.setArtifactDescriptorPolicy( new SimpleArtifactDescriptorPolicy(true, true) );
LocalRepository localRepo = new LocalRepository( /*"target/local-repo" */target);
session.setLocalRepositoryManager( system.newLocalRepositoryManager( session, localRepo ) );
return session;
}
/**
* 建立RepositorySystem
* @return RepositorySystem
*/
private static RepositorySystem newRepositorySystem()
{
DefaultServiceLocator locator = MavenRepositorySystemUtils.newServiceLocator();
locator.addService( RepositoryConnectorFactory.class, BasicRepositoryConnectorFactory.class );
locator.addService( TransporterFactory.class, FileTransporterFactory.class );
locator.addService( TransporterFactory.class, HttpTransporterFactory.class );
return locator.getService( RepositorySystem.class );
}
public static List<File> downloadAllJar(MavenJarLocation location, File targetFile) throws DependencyResolutionException, DependencyCollectionException {
String groupId=location.getGroupId();
String artifactId=location.getArtifactId();
String version=location.getVersion();
RepositorySystem repoSystem = newRepositorySystem();
RepositorySystemSession session = newSession( repoSystem ,targetFile.getAbsolutePath());
/**
* 下载一个jar包
*/
Artifact artifact=new DefaultArtifact(groupId+":"+artifactId+":"+version);
Dependency dependency = new Dependency(artifact, null);
CollectRequest collectRequest = new CollectRequest();
collectRequest.setRoot(dependency);
for (RemoteRepository remoteRepository : getxxxxRepository()) {
collectRequest.addRepository(remoteRepository);
}
DependencyNode node = repoSystem.collectDependencies(session, collectRequest).getRoot();
DependencyRequest dependencyRequest = new DependencyRequest();
dependencyRequest.setRoot(node);
dependencyRequest.setFilter(new DependencyFilter() {
@Override
public boolean accept(DependencyNode node, List<DependencyNode> parents) {
log.info("开始下载依赖：{}",node.getArtifact().toString());
return true;
}
});
repoSystem.resolveDependencies(session, dependencyRequest);
PreorderNodeListGenerator nlg = new PreorderNodeListGenerator();
node.accept(nlg);
return nlg.getFiles();
}
private static List<RemoteRepository> getxxxxRepository(){
List<RemoteRepository> list = new ArrayList<>();
list.add((new RemoteRepository.Builder( "artifactory", "default", "https://artifactory.xxxx.com/libs-snapshots")
.setSnapshotPolicy(new RepositoryPolicy(true,RepositoryPolicy.UPDATE_POLICY_ALWAYS,RepositoryPolicy.CHECKSUM_POLICY_WARN)).build()));
list.add(new RemoteRepository.Builder( "snapshots", "default", "https://artifactory.xxxx.com/libs-releases" ).build());
list.add(new RemoteRepository.Builder( "central", "default", "https://maven.aliyun.com/repository/central" ).build());
{
list.add(new RemoteRepository.Builder( "daojia", "default", "http://nexus.corp.imdada.cn/content/repositories/daojiaRepo/" ).build());
list.add(new RemoteRepository.Builder( "dadaarchetype", "default", "http://nexus.corp.imdada.cn/content/repositories/public/" ).build());
list.add(new RemoteRepository.Builder( "daddacentral", "default", "http://nexus.corp.imdada.cn/content/repositories/public/" ).build());
}
return list;
}
public static String getJarLatestVersion(MavenJarLocation location){
File tempDir = Files.createTempDir();
try{
return getJarLatestVersion(location,tempDir);
}finally {
FileUtils.deleteQuietly(tempDir);
}
}
public static String getJarLatestVersion(MavenJarLocation location, File targetFile){
// 需要检查的jar包坐标
String groupId=location.getGroupId();
String artifactId=location.getArtifactId();
String version=location.getVersion();
// 创建Aether库相关的对象
RepositorySystem repositorySystem = newRepositorySystem();
RepositorySystemSession session = newSession( repositorySystem ,targetFile.getAbsolutePath());;
Artifact artifact=new DefaultArtifact(groupId+":"+artifactId+":"+version);
ArtifactRequest artifactRequest=new ArtifactRequest();
for (RemoteRepository remoteRepository : getxxxxRepository()) {
artifactRequest.addRepository(remoteRepository);
}
artifactRequest.setArtifact(artifact);
try {
VersionRequest request = new VersionRequest();
request.setArtifact(artifact);
for (RemoteRepository remoteRepository : getxxxxRepository()) {
request.addRepository(remoteRepository);
}
VersionResult result = repositorySystem.resolveVersion(session, request);
return result.getVersion();
}catch (Exception e){
throw new BizException("获取jar包最新更新时间失败："+e.getMessage(),e);
}
}
public static boolean existMockJar(MavenJarLocation location,File targetFile){
// 需要检查的jar包坐标
String groupId=location.getGroupId();
String artifactId=location.getArtifactId();
String version=location.getVersion();
// 仓库信息
String repositoryUrl = "https://repo.maven.apache.org/maven2";
String repositoryId = "central";
// 创建Aether库相关的对象
RepositorySystem repositorySystem = newRepositorySystem();
RepositorySystemSession session = newSession( repositorySystem ,targetFile.getAbsolutePath());;
Artifact artifact=new DefaultArtifact(groupId+":"+artifactId+":"+version);
ArtifactRequest artifactRequest=new ArtifactRequest();
for (RemoteRepository remoteRepository : getxxxxRepository()) {
artifactRequest.addRepository(remoteRepository);
}
artifactRequest.setArtifact(artifact);
try {
final ArtifactResult result = repositorySystem.resolveArtifact(session, artifactRequest);
// 获取jar包文件路径
File jarFile = result.getArtifact().getFile();
if (jarFile.exists()) {
log.info("artifact.success_resolve_maven_location:groupId={},artifactId={},version={}",groupId,artifactId,version);
return true;
} else {
log.info("artifact.err_not_exist_maven_location:groupId={},artifactId={},version={}",groupId,artifactId,version);
return false;
}
} catch (ArtifactResolutionException e) {
log.error("artifact.err_resolve_maven_location:groupId={},artifactId={},version={}",groupId,artifactId,version,e);
return false;
}
}
public static File downloadSingleJar(MavenJarLocation location, File targetFile) throws ArtifactResolutionException
{
String groupId=location.getGroupId();
String artifactId=location.getArtifactId();
String version=location.getVersion();
RepositorySystem repoSystem = newRepositorySystem();
RepositorySystemSession session = newSession( repoSystem ,targetFile.getAbsolutePath());
/**
* 下载一个jar包
*/
Artifact artifact=new DefaultArtifact(groupId+":"+artifactId+":"+version);
ArtifactRequest artifactRequest=new ArtifactRequest();
for (RemoteRepository remoteRepository : getxxxxRepository()) {
artifactRequest.addRepository(remoteRepository);
}
artifactRequest.setArtifact(artifact);
final ArtifactResult artifactResult = repoSystem.resolveArtifact(session, artifactRequest);
return artifactResult.getArtifact().getFile();
}
}
