java.nio.file.InvalidPathException：索引 2 處的非法字符 <:>：

Question

我必須將類路徑資源從一個 package 復制到另一個。

我的程序是：

    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);

        }

在Files.copy方法中我得到異常：

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)

如何解決？

解決方案

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);
    }

此代碼正確地Movie.class從 package com/stackoverflow/main復制到com/stackoverflow/json中。

Answer 1

問題是Paths.get()不期望從uri.getPath()生成的那種值。

解決方案：

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

Answer 2

嘗試這個：

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

以獲得正確的路徑。 幾個小時后為我工作，試圖找出為什么我無法從 jar 中獲取文件。 這適用於 NetBeans 8.02

Answer 3

我遇到了同樣的問題並得到了異常，注意到文件名中有一個空格，所以我不得不修剪它。 之后，問題就解決了。

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

Answer 4

經過多次嘗試，這對我有用

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

現在您可以根據需要使用您的路徑，例如

        Reader reader = Files.newBufferedReader(path);

Answer 5

我遇到了過去兩天面臨的同樣問題，最后，我明白了空間導致此類問題嘗試解決

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

Answer 6

以下解決方案正常工作：

解決方案1：

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

解決方案2：

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

---

private static URL getURL(String localPath) {

      return Main.class.getResource(localPath);
}

Answer 7

我在自動化中使用 extentReports 時遇到了同樣的問題，我只是更正了報告路徑

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");

... }