java - 在 Java 中复制 XML 文件以写入新的 XML 文件

Question

我想知道是否有人知道是否可以使用 Java 中的一个 XML 解析器来逐行读取 XML 文档中的每一行，并基本上在另一个 XML 文件中再现相同的文档？ (在我的例子中，只取文档中从点 X 到点 Y 的行并复制它们)。我考虑过在小型试运行中使用 bufferedreader 和 bufferedwriter，但它并没有完全正确地输出文件。下面是我在试运行中所做的，但这不是我想要的。那么有没有人对此有任何经验或有任何想法或建议？提前谢谢你。

Java 代码

public class IPDriver 
{
    public static void main(String[] args) throws IOException
    {
        BufferedReader reader = new BufferedReader(new FileReader("C:/Documents and Settings/user/workspace/Intern Project/Proposals/Converted Proposals/Extracted Items/ProposalOne/word/document.xml"));
        BufferedWriter writer = new BufferedWriter(new FileWriter("C:/Documents and Settings/user/workspace/Intern Project/Proposals/Converted Proposals/Extracted Items/ProposalOne/word/tempdocument.xml"));

        String line = null;

        while ((line = reader.readLine()) != null)
        {
            writer.write(line);
        }

        // Close to unlock.
        reader.close();
        // Close to unlock and flush to disk.
        writer.close();
    }
}

感谢 Ted Hopp 的工作 JAVA 代码

public class IPDriver 
    {
        public static void main(String[] args) throws IOException
        {
            BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream("C:/Documents and Settings/user/workspace/Intern Project/Proposals/Converted Proposals/Extracted Items/ProposalOne/word/document.xml"), "UTF-8"));
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("C:/Documents and Settings/user/workspace/Intern Project/Proposals/Converted Proposals/Extracted Items/ProposalOne/word/tempdocument.xml"), "UTF-8"));

            String line = null;

            while ((line = reader.readLine()) != null)
            {
                writer.write(line);
            }

            // Close to unlock.
            reader.close();
            // Close to unlock and flush to disk.
            writer.close();
        }
    }

Answer 1

如果您的代码没有正确复制文件，我猜您遇到了字符编码问题。由于 XML 的默认编码是 UTF-8，而 FileReader 的默认编码是您平台的默认编码，我建议改为这样做:

BufferedReader reader = new BufferedReader(
    new InputStreamReader(
        new FileInputStream("...input file path..."),
        "UTF-8"
    )
);
BufferedWriter writer = new BufferedWriter(
    new OutputStreamWriter(
        new FileOutputStream("...output file path..."),
        "UTF-8"
    )
);

XML 解析器将为您提供元素(或元素事件)，而不是行。例如，他们无法区分空白的变化:

<tag attr1="val1" attr2="val2" />

对比:

<tag attr1="val1"
     attr2="val2"
     />

如果您的要求包括区分这两种情况，那么 XML 解析器方法将不起作用。