JARCF的Java代码等价物

我正在编写一个java程序，该程序获取生成的.class文件并将其JAR，然后使用类加载器将其加载到内存中

我目前有一个工作的jarring系统，代码如下：

 public static int BUFFER_SIZE = 10240;
  protected static void createJarArchive(File archiveFile, File[] tobeJared) {
    try {
      byte buffer[] = new byte[BUFFER_SIZE];
      // Open archive file
      FileOutputStream stream = new FileOutputStream(archiveFile);
      JarOutputStream out = new JarOutputStream(stream, new Manifest());

      for (int i = 0; i < tobeJared.length; i++) {
        if (tobeJared[i] == null || !tobeJared[i].exists()
            || tobeJared[i].isDirectory())
          continue; // Just in case...
        System.out.println("Adding " + tobeJared[i].getName());

        // Add archive entry
        JarEntry jarAdd = new JarEntry(getPackageNameModified +tobeJared[i].getName());
        jarAdd.setTime(tobeJared[i].lastModified());
        out.putNextEntry(jarAdd);

        // Write file to archive
        FileInputStream in = new FileInputStream(tobeJared[i]);
        while (true) {
          int nRead = in.read(buffer, 0, buffer.length);
          if (nRead <= 0)
            break;
          out.write(buffer, 0, nRead);
        }
        in.close();
      }

      out.close();
      stream.close();
      System.out.println("Adding completed OK");
    } catch (Exception ex) {
      ex.printStackTrace();
      System.out.println("Error: " + ex.getMessage());
    }
  }

但是，当我将jar加载到内存中时，我得到一个错误：

Could not load jar C:\Users\Dalton\AppData\Local\Temp\Test.jar into JVM. (Could not find class com.Test.ObjectFactory.)

我正在使用一个squoop类加载器来实现这一点

又名：

使用以下命令行，类加载器代码可以正常工作，但我希望避免在java程序中使用命令行：

jar cf C:\Users\Dalton\AppData\Local\Temp\Test.jar -C C:\Users\Dalton\AppData\Local\Temp\Test\com.Test com\Test

---

以下解决了我的问题：

try
    {
        byte buffer[] = new byte[BUFFER_SIZE];
        // Open archive file
        FileOutputStream stream = new FileOutputStream(archiveFile);
        JarOutputStream out = new JarOutputStream(stream, new Manifest());

        for (int i = 0; i < tobeJared.length; i++)
        {
            if (tobeJared[i].toString().endsWith(CLASS))
            { 
                // the .replace \\ with / is a java JDK bug that requires all
                    // paths to use / and end in / for a jar to properly be made

                LOG.info("Adding "
                        + getPackageNameModified().replace(
                                DOUBLE_BACKSLASH, FORWARD_SLASH) + FORWARD_SLASH + tobeJared[i].getName()
                        + " to the temporary JAR.");

                // Add archive entry
                JarEntry jarAdd = new JarEntry(
                        getPackageNameModified().replace(DOUBLE_BACKSLASH,
                                FORWARD_SLASH) + FORWARD_SLASH + tobeJared[i].getName());
                jarAdd.setTime(tobeJared[i].lastModified());
                out.putNextEntry(jarAdd);

                // Write file to archive
                FileInputStream in = new FileInputStream(tobeJared[i]);
                while (true)
                {
                    int nRead = in.read(buffer, 0, buffer.length);
                    if (nRead <= 0) break;
                    out.write(buffer, 0, nRead);
                }
                in.close();
            }
        }

        out.close();
        stream.close();
        LOG.info("Adding complete --> Success");
    }
    catch (Exception ex)
    {
        ex.printStackTrace();
        LOG.error("Error: " + ex.getMessage());
    }

试试看
{
字节缓冲区[]=新字节[缓冲区大小]；
//打开存档文件
FileOutputStream=新的FileOutputStream（archiveFile）；
JarOutputStream out=新的JarOutputStream（stream，new Manifest（））；
for（int i=0；i如果（nRead）您确实使用了
jar tf
来验证程序创建的.jar文件的内容，对吗？jar（和zip）条目的名称使用/作为路径分隔符，并在最后一个包（名义上是目录）之间包含一个分隔符组件和basename.FYI:Windows路径名可以使用/或\在java中，只有一些程序和对话框需要\。
jar cf C:\Users\Dalton\AppData\Local\Temp\Test.jar -C C:\Users\Dalton\AppData\Local\Temp\Test\com.Test com\Test

try
    {
        byte buffer[] = new byte[BUFFER_SIZE];
        // Open archive file
        FileOutputStream stream = new FileOutputStream(archiveFile);
        JarOutputStream out = new JarOutputStream(stream, new Manifest());

        for (int i = 0; i < tobeJared.length; i++)
        {
            if (tobeJared[i].toString().endsWith(CLASS))
            { 
                // the .replace \\ with / is a java JDK bug that requires all
                    // paths to use / and end in / for a jar to properly be made

                LOG.info("Adding "
                        + getPackageNameModified().replace(
                                DOUBLE_BACKSLASH, FORWARD_SLASH) + FORWARD_SLASH + tobeJared[i].getName()
                        + " to the temporary JAR.");

                // Add archive entry
                JarEntry jarAdd = new JarEntry(
                        getPackageNameModified().replace(DOUBLE_BACKSLASH,
                                FORWARD_SLASH) + FORWARD_SLASH + tobeJared[i].getName());
                jarAdd.setTime(tobeJared[i].lastModified());
                out.putNextEntry(jarAdd);

                // Write file to archive
                FileInputStream in = new FileInputStream(tobeJared[i]);
                while (true)
                {
                    int nRead = in.read(buffer, 0, buffer.length);
                    if (nRead <= 0) break;
                    out.write(buffer, 0, nRead);
                }
                in.close();
            }
        }

        out.close();
        stream.close();
        LOG.info("Adding complete --> Success");
    }
    catch (Exception ex)
    {
        ex.printStackTrace();
        LOG.error("Error: " + ex.getMessage());
    }