发布jar包到服务器读取resource目录下文件

* 解决：当项目打包成jar之后resources路径下面的证书文件访问不到
* 思路：
*  1、运行时先复制一个jar
*  2、将复制的jar解压到jar文件目录
*  3、删除复制的jar跟解压的非证书文件夹

package blockchaincode;

import blockchaincode.utils.CryptoUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import blockchaincode.utils.TempCryptoFolderUtil;

import com.sunsheen.jfids.das.core.DasApplication;
import com.sunsheen.jfids.das.core.annotation.DasBootApplication;

/**
 *
 * 当独立开发HKDAS应用时（Java工程、Maven工程），使用这种方式启动应用。
 * @author WangSong
 *
 */

@DasBootApplication()
public class DasApplicationBootstrap {
    private static Logger log = LoggerFactory.getLogger(DasApplicationBootstrap.class);

    public static void main(String[] args) {
        //将证书文件拷贝到项目同级目录下
        try {
            CryptoUtil.pass();
        } catch (Exception e) {
            e.printStackTrace();
            log.error("当前jar包目录の证书文件拷贝异常！", e);
            System.err.println("证书文件拷贝异常！");
        }
        //启动
        DasApplication.run(DasApplicationBootstrap.class, args);
    }

}

package blockchaincode.utils;

import java.io.File;
import java.net.URL;

import org.apache.derby.impl.tools.sysinfo.Main;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 解决：当项目打包成jar之后resources路径下面的证书文件访问不到
 * 思路：
 *     1、运行时先复制一个jar
 *     2、将复制的jar解压到jar文件目录
 *     3、删除复制的jar跟解压的非证书文件夹
 * @author WangSong
 */
public class CryptoUtil {
    private static Logger log = LoggerFactory.getLogger(CryptoUtil.class);

    private CryptoUtil(){}

    public static void pass()throws Exception{
        /** 获取当前jar位置 **/
        URL url = Main.class.getClassLoader().getResource("crypto-config/");
        //当前需要是个jar文件
        String protocol = url.getProtocol();//大概是jar
        if (!"jar".equalsIgnoreCase(protocol)) {
            log.error("没有以jar运行，不重复生成证书文件。");
            return;
        }
//        jar:file:/home/hkdas-123/HKDAS/app/blockchaincode-provider-1.0.0-jar-with-dependencies.jar!/
        String jarPath = url.toString().substring(0, url.toString().indexOf("!/") + 2);
        /** 将jar复制一份到当前文件夹 **/
        String oldJar = jarPath.substring(jarPath.indexOf("/"),jarPath.lastIndexOf("!/"));
        String jarFolder = oldJar.substring(0,oldJar.indexOf("blockchaincode"));
        String copiedJar = jarFolder + "copied.jar";
        JarUtil.copyJarByJarFile(new File(oldJar), new File(copiedJar));
        /** 解压复制的jar文件 **/
        JarUtil.unJarByJarFile(new File(copiedJar), new File(jarFolder));
        /** 删除--除了证书文件夹和jar文件的所有文件夹 **/
        deleteDir(jarFolder);
    }

    //清空文件夹下除了证书文件夹和jar文件的所有文件
    private static boolean deleteDir(String path){
        File file = new File(path);
        if(!file.exists()){//判断是否待删除目录是否存在
//            System.err.println("The dir are not exists!");
            log.error("The dir are not exists!"+file.getAbsolutePath());
            return false;
        }

        String[] content = file.list();//取得当前目录下所有文件和文件夹
        for(String name : content){
            File temp = new File(path, name);
            if(temp.isDirectory()){
                //如果是证书文件，不删除
                if(name.contains("crypto-config"))
                    continue;

                deleteDir(temp.getAbsolutePath());//递归调用，删除目录里的内容
                temp.delete();//删除空目录
            }else{
                //如果是jar包，不删除
                if(name.contains(".jar"))
                    continue;
                if(!temp.delete()){//直接删除文件
//                    System.err.println("Failed to delete " + name);
                    log.error("Failed to delete " + name);
                }
            }
        }
        return true;
    }
}

package blockchaincode.utils;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.JarOutputStream;
import java.util.zip.ZipEntry;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * jar包压缩跟解压工具类
 * @author WangSong
 *
 */
public class JarUtil {
    private static Logger log =  LoggerFactory.getLogger(JarUtil.class);

    private JarUtil(){}

    /**
     * 复制jar by JarFile
     * @param src
     * @param des
     * @throws IOException
     */
    public static void copyJarByJarFile(File src , File des) throws IOException{
        //重点
        JarFile jarFile = new JarFile(src);
        Enumeration<JarEntry> jarEntrys = jarFile.entries();
        JarOutputStream jarOut = new JarOutputStream(new BufferedOutputStream(new FileOutputStream(des)));
        byte[] bytes = new byte[1024];

        while(jarEntrys.hasMoreElements()){
            JarEntry entryTemp = jarEntrys.nextElement();
            jarOut.putNextEntry(entryTemp);
            BufferedInputStream in = new BufferedInputStream(jarFile.getInputStream(entryTemp));
            int len = in.read(bytes, 0, bytes.length);
            while(len != -1){
                jarOut.write(bytes, 0, len);
                len = in.read(bytes, 0, bytes.length);
            }
            in.close();
            jarOut.closeEntry();
            log.error("复制完成: " + entryTemp.getName());
        }

        jarOut.finish();
        jarOut.close();
        jarFile.close();
    }

    /**
     * 解压jar文件by JarFile
     * @param src
     * @param desDir
     * @throws FileNotFoundException
     * @throws IOException
     */
    public static void unJarByJarFile(File src , File desDir) throws FileNotFoundException, IOException{
        JarFile jarFile = new JarFile(src);
        Enumeration<JarEntry> jarEntrys = jarFile.entries();
        if(!desDir.exists())
            desDir.mkdirs(); //建立用户指定存放的目录
        byte[] bytes = new byte[1024];    

        while(jarEntrys.hasMoreElements()){
            ZipEntry entryTemp = jarEntrys.nextElement();
            File desTemp = new File(desDir.getAbsoluteFile() + File.separator + entryTemp.getName());

            if(entryTemp.isDirectory()){    //jar条目是空目录
                if(!desTemp.exists())
                    desTemp.mkdirs();
                log.error("makeDir" + entryTemp.getName());
            }else{    //jar条目是文件
                //因为manifest的Entry是"META-INF/MANIFEST.MF",写出会报"FileNotFoundException"
                File desTempParent = desTemp.getParentFile();
                if(!desTempParent.exists())desTempParent.mkdirs();

                BufferedInputStream in = new BufferedInputStream(jarFile.getInputStream(entryTemp));
                BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(desTemp));

                int len = in.read(bytes, 0, bytes.length);
                while(len != -1){
                    out.write(bytes, 0, len);
                    len = in.read(bytes, 0, bytes.length);
                }

                in.close();
                out.flush();
                out.close();

                log.error("解压完成: " + entryTemp.getName());
            }
        }
        jarFile.close();
    }

}