java.nio.file.InvalidPathException: Illegal char <:> at index 2:

Question

I have to copy classpath resource from one package to another.

My program is:

    public static void main(String[] args) throws IOException, URISyntaxException {

            ClassLoader classLoader = CopyFileToDirectoryTest.class.getClassLoader();
InputStream in = classLoader.getResourceAsStream("com/stackoverflow/main/Movie.class");

            URI uri = ClassLoader.getSystemResource("com/stackoverflow/json").toURI();
            Path path = Paths.get(uri.getPath(),"Movie.class");
            System.out.println(path);

            long copy = Files.copy(in, path, StandardCopyOption.REPLACE_EXISTING);
            System.out.println(copy);

        }

At Files.copy method I get exception:

Exception in thread "main" java.nio.file.InvalidPathException: Illegal char <:> at index 2: /D:/Programs/workspaceEE/HibernateDemo/target/classes/com/stackoverflow/json
    at sun.nio.fs.WindowsPathParser.normalize(WindowsPathParser.java:182)
    at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:153)
    at sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:77)
    at sun.nio.fs.WindowsPath.parse(WindowsPath.java:94)
    at sun.nio.fs.WindowsFileSystem.getPath(WindowsFileSystem.java:255)
    at java.nio.file.Paths.get(Paths.java:84)
    at com.stackoverflow.main.CopyFileToDirectoryTest.main(CopyFileToDirectoryTest.java:34)

How to solve it?

Solution

public static void main(String[] args) throws IOException, URISyntaxException {
        ClassLoader classLoader = CopyFileToDirectoryTest.class.getClassLoader();
        InputStream in = classLoader.getResourceAsStream("com//stackoverflow//main//Movie.class");
        URI uri = ClassLoader.getSystemResource("com//stackoverflow//json").toURI();
        String mainPath = Paths.get(uri).toString();
        Path path = Paths.get(mainPath, "Movie.class");
        System.out.println(path);
        long copy = Files.copy(in, path, StandardCopyOption.REPLACE_EXISTING);
        System.out.println(copy);
    }

This code correctly copies Movie.class from package com/stackoverflow/main into com/stackoverflow/json.

This doesn't work because your classpath is composed of transparent and opaque resources - such as those inside a jar. You are trying to write to a path that looks something like jar:file:/com/stackoverflow/json, which is an invalid Path or File but a valid URI. In general, you cannot write to the classpath, only read from it. — Boris the Spider
– Boris the Spider, Commented May 15, 2017 at 6:47
When you compile a Maven project it will generate a jar. How else would you distribute your compiled code? (Pre Java 9 that is) — Boris the Spider
– Boris the Spider, Commented May 15, 2017 at 6:50

Dmitriy Popov · Accepted Answer · 2023-07-28 12:50:07Z

77

problem is that Paths.get() doesn't expect that kind of value which is generated from uri.getPath().

Solution:

URI uri = ClassLoader.getSystemResource("com/stackoverflow/json").toURI();
String mainPath = Paths.get(uri).toString();
Path path = Paths.get(mainPath ,"Movie.class");

edited Jul 28, 2023 at 12:50

Dmitriy Popov

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answered May 15, 2017 at 7:42

hunter

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Comments

lczapski · Accepted Answer · 2021-01-03 12:50:10Z

11

Try this:

Path path = new File(getClass()
.getResource("/<path to the image in your build/classes folder>")
.getFile()).toPath();

to get the correct path. Worked for me after several hours trying to find out why I couldn't get the file from the jar. This works for NetBeans 8.02

edited Jan 3, 2021 at 12:50

lczapski

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answered Jun 6, 2019 at 12:53

Fego

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Comments

svarog · Accepted Answer · 2019-01-10 12:32:44Z

5

I had the same issue and got the exception, noticed there was a space in the filename, so I had to trim it. After that, the issue is resolved.

Path filePath = Paths.get(dirPathStr, newFileName.trim());

edited Jan 10, 2019 at 12:32

svarog

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answered Dec 28, 2017 at 21:09

techguy

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Odwori · Accepted Answer · 2022-03-31 21:48:32Z

4

After trying many times, this worked for me

      Path path = new File(getClass().getResource("/data.json").getFile()).toPath();

Now you can use your path as you wish e.g

        Reader reader = Files.newBufferedReader(path);

answered Mar 31, 2022 at 21:48

Odwori

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tryingToLearn · Accepted Answer · 2019-11-14 05:32:08Z

2

I have the same problem which I was facing from the past two days and finally, I got it Space causes such problem try to solve

var fileName=YourFileName.trim();
Path filePath = Paths.get(dirPathStr, fileName);

edited Nov 14, 2019 at 5:32

tryingToLearn

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answered May 11, 2019 at 14:06

SUDIP SINGH

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Comments

Monica Gatti · Accepted Answer · 2023-04-10 16:29:36Z

I had the same error

./gradlew build

2023-04-10T16:56:54.855+02:00 INFO 10476 --- [ main] c.v.s.d.m.a.VogellaApplication : No active profile set, falling back to 1 default profile: "default" Exception in thread "main" java.nio.file.InvalidPathException: Trailing char < > at index 27: com.vogella.spring.di.model at java.base/sun.nio.fs.WindowsPathParser.normalize(WindowsPathParser.java:191) at java.base/sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:153) at java.base/sun.nio.fs.WindowsPathParser.parse(WindowsPathParser.java:77) at java.base/sun.nio.fs.WindowsPath.parse(WindowsPath.java:92)

I analyzed the filenames and the configuration. I noticed a space in the 'group' property in build.gradle file

group = 'com.vogella.spring.di.model '

I removed the extra space and the build command worked fine.

Osadhi Virochana · Accepted Answer · 2021-01-03 09:35:35Z

0

The following solutions work correctly:

Solution1:

String logFileLocalPath = "../log/log.txt";
File logFile = new File(getURL(logFileLocalPath).getPath());

Solution 2:

File logFile = new 
File(Paths.get(getURL(logFileLocalPath).toURI()).toString());

private static URL getURL(String localPath) {

      return Main.class.getResource(localPath);
}

edited Jan 3, 2021 at 9:35

Osadhi Virochana

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answered Jan 3, 2021 at 9:11

Programmer

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Comments

Pooja Sharma · Accepted Answer · 2022-01-13 12:09:35Z

0

I faced same issue while using extentReports in my automation, i simply corrected the report path

public void config() {
    String path = System.getProperty("user.dir")+"\\reports\\index.html";       
    ExtentSparkReporter reporter = new ExtentSparkReporter(path);
    reporter.config().setReportName("Web Automation Reports");
    reporter.config().setDocumentTitle("Web Results");

... }

answered Jan 13, 2022 at 12:09

Pooja Sharma

1

Comments

user23242385 · Accepted Answer · 2024-01-14 07:12:38Z

0

I faced this issue while working on microservices application

package com.test.employeeapp;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.openfeign.EnableFeignClients;

@SpringBootApplication
@EnableFeignClients(basePackages = "com.test.employeeapp.feignclient ")
public class EmployeeServiceApplication {

public static void main(String[] args) {
    SpringApplication.run(EmployeeServiceApplication.class, args);
}

}
in basePackages where have by mistake placed one extra space I just removed it 
and it worked
so what I suggest that just cross check once any extra space is added.

answered Jan 14, 2024 at 7:12

user23242385

1

Comments

Victor Ruiz Chambi · Accepted Answer · 2024-08-18 16:44:13Z

0

I want to contribute with one possible solution. First of all, the origin of the problem is because of the structure of the path. Working with Windows is different from Mac and Linux.

In linux the path will never contain ":" char.
In windows the path always start with capital letter (D:, C:, etc) and not with "/" like Linux or Mac.

Try removing the first "/" that is before the capital letter, like this:

URI uri = ClassLoader.getSystemResource("com/stackoverflow/json").toURI();// "/D:/Programs/workspaceEE/HibernateDemo/target/classes/com/stackoverflow/json"
String uriPath = uri.getPath();
return Paths.get(uriPath.substring(1));// "D:/Programs/workspaceEE/HibernateDemo/target/classes/com/stackoverflow/json"

Remember, this works fine only for Windows OS.

edited Aug 18, 2024 at 16:44

answered Aug 16, 2024 at 12:04

Victor Ruiz Chambi

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