如何在* .jsp中显示文本到textArea？

Question

我通过request.setAttribute("path", textpath);传递（* .txt）的路径request.setAttribute("path", textpath); 在servlet.java中将其* .jsp * .txt在Web服务器地址中。如何将内容显示到textArea？谢谢。

Answer 1

由于您正在谈论JSP和读取文件，所以我推断我们正在谈论Java。 您想将文件的内容读取为字符串，对吗？

这是用于执行此操作的Java方法。

/**
 * Return the contents of file as a String.
 * 
 * @param file
 *            The path to the file to be read
 * @return The contents of file as a String, or null if the file couldn't be
 *         read.
 */
private static String getFileContents(String file) {

  /*
   * Yes. This really is the simplest way I could find to do this in Java.
   */

  byte[] bytes;
  FileInputStream stream;
  try {
    stream = new FileInputStream(file);
  } catch (FileNotFoundException e) {
    System.out.println("File not found: `" + file + "`");
    e.printStackTrace();
    return null;
  }
  try {
    bytes = new byte[stream.available()];
    stream.read(bytes);
    stream.close();
  } catch (IOException e) {
    System.out.println("IO Exception while getting contents of `"
        + file + "`");
    e.printStackTrace();
    return null;
  }
  return new String(bytes);
}

因此，您可以将其称为String fileContents = getFileContents(textPath); 。

然后，在页面中，您会说<textarea><%= fileContents %></textarea> 。