你如何在 Java 中制作一个不包含绝对路径名的 Zip/Jar [英] How do you make a Zip/Jar in Java that will not contain the absolute pathname

问题描述

我正在用 Java 生成一个 .jar 文件，但 .jar 包含它在系统中的位置的绝对路径名(/tmp/tempXXX/foo 而不是/foo).树是这样的:

<预><代码>.|-- 元信息|-|- ....|-- tmp|-|- tempXXX|-|-|- foo|-|-|- 酒吧

取而代之的是:

<预><代码>.|-- 元信息|-|- ....|-- 富|-- 酒吧

有没有可能解决这个问题?这是实现它的功能:

public static void add(File source, JarOutputStream target, String removeme)抛出 IOException{BufferedInputStream in = null;尝试{文件源 2 = 源；如果 (source.isDirectory()){String name = source2.getPath().replace("\", "/");如果 (!name.isEmpty()){if (!name.endsWith("/"))名称 += "/";JarEntry entry = new JarEntry(name);entry.setTime(source.lastModified());target.putNextEntry(entry);target.closeEntry();}for (文件嵌套文件:source.listFiles())添加(嵌套文件，目标，removeme)；返回;}JarEntry entry = new JarEntry(source2.getPath().replace("\", "/"));entry.setTime(source.lastModified());target.putNextEntry(entry);in = new BufferedInputStream(new FileInputStream(source));字节[]缓冲区=新字节[2048]；而(真){int count = in.read(buffer);如果(计数== -1)休息;target.write(buffer, 0, count);}target.closeEntry();}最后{如果(在！= null)附寄();}}

source2 变量是为了修改路径而制作的，但是修改的时候报错Invalid .jar file".修改是这样的:

File source2 = new File(source.getPath().replaceAll("^" + removeme, ""));

现在可以使用了.如果有人感兴趣，这是新代码:

public static void add(File source, JarOutputStream target, String removeme)抛出 IOException{BufferedInputStream in = null;尝试{File parentDir = new File(removeme);File source2 = new File(source.getCanonicalPath().substring(parentDir.getCanonicalPath().length() + 1,source.getCanonicalPath().length()));如果 (source.isDirectory()){String name = source2.getPath().replace("\", "/");如果 (!name.isEmpty()){if (!name.endsWith("/"))名称 += "/";JarEntry entry = new JarEntry(name);entry.setTime(source.lastModified());target.putNextEntry(entry);target.closeEntry();}for (文件嵌套文件:source.listFiles())添加(嵌套文件，目标，removeme)；返回;}JarEntry entry = new JarEntry(source2.getPath().replace("\", "/"));entry.setTime(source.lastModified());target.putNextEntry(entry);in = new BufferedInputStream(new FileInputStream(source));字节[]缓冲区=新字节[2048]；而(真){int count = in.read(buffer);如果(计数== -1)休息;target.write(buffer, 0, count);}target.closeEntry();}最后{如果(在！= null)附寄();}}

解决方案

要获取相对路径，调用 JarEntry(name) 时必须提供相对路径.尝试删除直到父目录的路径部分.所以这会是这样的，

File parentDir = "src";//你想要的相对路径的目录字符串 relPath = source.getCanonicalPath().substring(parentDir.getCanonicalPath().length() + 1,source.getCanonicalPath().length());JarEntry entry = new JarEntry(relPath.replace(("\", "/"));...

I'm generating a .jar file in Java, but the .jar contains an absolute pathname of where it is in the system (/tmp/tempXXX/foo instead of /foo). The tree is like this:

.
|-- META-INF
|-|- ....
|-- tmp
|-|- tempXXX
|-|-|- foo
|-|-|- bar

Instead of this:

.
|-- META-INF
|-|- ....
|-- foo
|-- bar

Is it possible to fix this? Here is the function that makes it:

public static void add(File source, JarOutputStream target, String removeme)
        throws IOException
{
    BufferedInputStream in = null;
    try
    {
        File source2 = source;
        if (source.isDirectory())
        {
            String name = source2.getPath().replace("\", "/");
            if (!name.isEmpty())
            {
                if (!name.endsWith("/"))
                    name += "/";
                JarEntry entry = new JarEntry(name);
                entry.setTime(source.lastModified());
                target.putNextEntry(entry);
                target.closeEntry();
            }
            for (File nestedFile : source.listFiles())
                add(nestedFile, target, removeme);
            return;
        }

        JarEntry entry = new JarEntry(source2.getPath().replace("\", "/"));
        entry.setTime(source.lastModified());
        target.putNextEntry(entry);
        in = new BufferedInputStream(new FileInputStream(source));

        byte[] buffer = new byte[2048];
        while (true)
        {
            int count = in.read(buffer);
            if (count == -1)
                break;
            target.write(buffer, 0, count);
        }
        target.closeEntry();
    }
    finally
    {
        if (in != null)
            in.close();
    }
}

The source2 variable was made for modifying the path, but when modifying, it gave an "Invalid .jar file" error. The modification was this:

File source2 = new File(source.getPath().replaceAll("^" + removeme, ""));

Edit: It works now. Here is the new code if anyone is interested:

public static void add(File source, JarOutputStream target, String removeme)
        throws IOException
{
    BufferedInputStream in = null;
    try
    {
        File parentDir = new File(removeme);
        File source2 = new File(source.getCanonicalPath().substring(
                parentDir.getCanonicalPath().length() + 1,
                source.getCanonicalPath().length()));
        if (source.isDirectory())
        {
            String name = source2.getPath().replace("\", "/");
            if (!name.isEmpty())
            {
                if (!name.endsWith("/"))
                    name += "/";
                JarEntry entry = new JarEntry(name);
                entry.setTime(source.lastModified());
                target.putNextEntry(entry);
                target.closeEntry();
            }
            for (File nestedFile : source.listFiles())
                add(nestedFile, target, removeme);
            return;
        }

        JarEntry entry = new JarEntry(source2.getPath().replace("\", "/"));
        entry.setTime(source.lastModified());
        target.putNextEntry(entry);
        in = new BufferedInputStream(new FileInputStream(source));

        byte[] buffer = new byte[2048];
        while (true)
        {
            int count = in.read(buffer);
            if (count == -1)
                break;
            target.write(buffer, 0, count);
        }
        target.closeEntry();
    }
    finally
    {
        if (in != null)
            in.close();
    }
}

解决方案

To get the relative path, you have to provide a relative path when calling JarEntry(name). Try removing the portion of the path up to the parent directory. So that would be something like,

File parentDir = "src";//dir from which you want the relative path

String relPath = source.getCanonicalPath()
                  .substring(parentDir.getCanonicalPath().length() + 1,
                             source.getCanonicalPath().length());

JarEntry entry = new JarEntry(relPath.replace(("\", "/"));
...

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