Java: 处理 URI 中的特殊字符

Question

我正在尝试从 URI 访问文件，不幸的是，该文件路径包含特殊名称。

For example: file://C:/6-6+hf.1-181/db/mssql-ddl.sql

详细来说，下面是我的代码（scriptFile 具有以上值）：

File tempFile = FileUtility.fileFromUri(new URI(scriptFile));

哪个fileFromUri函数是

public static File fileFromUri(URI uri) {
    try {
        if(uri.getScheme() == null) {
            uri = (new File(uri.getPath())).toURI();
        } else if(!uri.getScheme().equals("file")) {
            return null;
        }

        String fileName = uri.toURL().getFile();
        return new File(URLDecoder.decode(fileName, "UTF8"));
    } catch (Exception var2) {
        return null;
    }
}

我有这样的例外情况

java.io.FileNotFoundException: C:/6-6+hf.1-181/db/mssql-ddl.sql (The system cannot find the path specified) at java.io.FileInputStream.open0(Native Method) ~[?:1.8.0_65] at java.io.FileInputStream.open(FileInputStream.java:195) ~[?:1.8.0_65] at java.io.FileInputStream.(FileInputStream.java:138) ~[?:1.8.0_65] at java.io.FileReader.(FileReader.java:72) ~[?:1.8.0_65] at com.automic.actions.common.utils.FileUtility.readFileAsString(FileUtility.java:70) ~[common-tool-develop-SNAPSHOT.jar:?] at com.automic.actions.database.utils.SQLRunner.readStatementsFromFile(SQLRunner.java:117) ~[classes/:?] at com.automic.actions.database.utils.SQLRunner.executeScript(SQLRunner.java:91) [classes/:?] at com.automic.actions.database.SQLFeature.run(SQLFeature.java:302) [classes/:?] at com.automic.actions.common.FeatureRunner.run(FeatureRunner.java:24) [common-tool-develop-SNAPSHOT.jar:?] at com.automic.actions.runner.DatabaseToolFileCmd.main(DatabaseToolFileCmd.java:25) [classes/:?]

我知道这个异常是因为我之前用过URLDecoder，解码后，Java将'+'字符翻译成space字符。解决方案可能只是将“+”字符替换为其他字符，然后再替换它。但是，我不想使用那种方法。
那么你能帮我解决这个问题吗？非常感谢！

Answer 1

当你通过URI传递路径时，你应该先对它进行编码，如果你使用ajax，也许encodeURIComponent()方法是合适的。像这样：

encodeURIComponent("file://C:/6-6+hf.1-181/db/mssql-ddl.sql")
//output
"file%3A%2F%2FC%3A%2F6-6%2Bhf.1-181%2Fdb%2Fmssql-ddl.sql"

如果你用javaURLEncode.encode(String str, String env)方法就对了

    String path = "file://C:/6-6+hf.1-181/db/mssql-ddl.sql";
    String path1 = URLEncoder.encode(path,"UTF-8");
    System.out.println(path1);
    String path2 = URLDecoder.decode(path1,"UTF-8");
    System.out.println(path2);

    //output
    file%3A%2F%2FC%3A%2F6-6%2Bhf.1-181%2Fdb%2Fmssql-ddl.sql
    file://C:/6-6+hf.1-181/db/mssql-ddl.sql

Java: 处理 URI 中的特殊字符

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