發布jar包到服務器讀取resource目錄下文件

* 解決：當項目打包成jar之后resources路徑下面的證書文件訪問不到
* 思路：
*  1、運行時先復制一個jar
*  2、將復制的jar解壓到jar文件目錄
*  3、刪除復制的jar跟解壓的非證書文件夾

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;

/**
 *
 * 當獨立開發HKDAS應用時（Java工程、Maven工程），使用這種方式啟動應用。
 * @author WangSong
 *
 */

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

    public static void main(String[] args) {
        //將證書文件拷貝到項目同級目錄下
        try {
            CryptoUtil.pass();
        } catch (Exception e) {
            e.printStackTrace();
            log.error("當前jar包目錄の證書文件拷貝異常！", e);
            System.err.println("證書文件拷貝異常！");
        }
        //啟動
        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;

/**
 * 解決：當項目打包成jar之后resources路徑下面的證書文件訪問不到
 * 思路：
 *     1、運行時先復制一個jar
 *     2、將復制的jar解壓到jar文件目錄
 *     3、刪除復制的jar跟解壓的非證書文件夾
 * @author WangSong
 */
public class CryptoUtil {
    private static Logger log = LoggerFactory.getLogger(CryptoUtil.class);
    
    private CryptoUtil(){}
    
    
    public static void pass()throws Exception{
        /** 獲取當前jar位置 **/
        URL url = Main.class.getClassLoader().getResource("crypto-config/");
        //當前需要是個jar文件
        String protocol = url.getProtocol();//大概是jar
        if (!"jar".equalsIgnoreCase(protocol)) {
            log.error("沒有以jar運行，不重復生成證書文件。");
            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);
        /** 將jar復制一份到當前文件夾 **/
        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));
        /** 解壓復制的jar文件 **/
        JarUtil.unJarByJarFile(new File(copiedJar), new File(jarFolder));
        /** 刪除--除了證書文件夾和jar文件的所有文件夾 **/
        deleteDir(jarFolder);
    }
    
    //清空文件夾下除了證書文件夾和jar文件的所有文件
    private static boolean deleteDir(String path){
        File file = new File(path);
        if(!file.exists()){//判斷是否待刪除目錄是否存在
//            System.err.println("The dir are not exists!");
            log.error("The dir are not exists!"+file.getAbsolutePath());
            return false;
        }

        String[] content = file.list();//取得當前目錄下所有文件和文件夾
        for(String name : content){
            File temp = new File(path, name);
            if(temp.isDirectory()){
                //如果是證書文件，不刪除
                if(name.contains("crypto-config"))
                    continue;
                
                deleteDir(temp.getAbsolutePath());//遞歸調用，刪除目錄里的內容
                temp.delete();//刪除空目錄
            }else{
                //如果是jar包，不刪除
                if(name.contains(".jar"))
                    continue;
                if(!temp.delete()){//直接刪除文件
//                    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包壓縮跟解壓工具類
 * @author WangSong
 *
 */
public class JarUtil {
    private static Logger log =  LoggerFactory.getLogger(JarUtil.class);

    
    private JarUtil(){}
    
    /**
     * 復制jar by JarFile
     * @param src
     * @param des
     * @throws IOException
     */
    public static void copyJarByJarFile(File src , File des) throws IOException{
        //重點
        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("復制完成: " + entryTemp.getName());
        }
        
        jarOut.finish();
        jarOut.close();
        jarFile.close();
    }
    
    /**
     * 解壓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(); //建立用戶指定存放的目錄
        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條目是空目錄
                if(!desTemp.exists())
                    desTemp.mkdirs();
                log.error("makeDir" + entryTemp.getName());
            }else{    //jar條目是文件
                //因為manifest的Entry是"META-INF/MANIFEST.MF",寫出會報"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("解壓完成: " + entryTemp.getName());
            }
        }
        jarFile.close();
    }
    
}