java - 使用 Java 在 Selenium WebDriver 中上传文件

Question

我正在尝试文件上传。我已经尝试过这段代码

driver.findElement(By.id("documents")).click();     
driver.get("C:"+File.separator+"exp"+File.separator+"tt.docx");

driver.findElement(By.id("page"));
Actions ac = new Actions(driver); 
WebElement element = driver.findElement(By.id("page"));                     
ac.click(element).perform();

Robot r = new Robot(); 
r.keyPress(KeyEvent.VK_ENTER); 
r.keyRelease(KeyEvent.VK_ENTER); 
r.keyPress(KeyEvent.VK_C); 
r.keyRelease(KeyEvent.VK_C); 
r.keyPress(KeyEvent.VK_PERIOD); 
r.keyRelease(KeyEvent.VK_PERIOD); 
r.keyPress(KeyEvent.VK_J); 
r.keyRelease(KeyEvent.VK_J); 
r.keyPress(KeyEvent.VK_P); 
r.keyRelease(KeyEvent.VK_P); 
r.keyPress(KeyEvent.VK_G); 
r.keyRelease(KeyEvent.VK_G); 
r.keyPress(KeyEvent.VK_ENTER); 
r.keyRelease(KeyEvent.VK_ENTER);

执行此代码文件的文件夹已打开但未在文本框中写入（文件路径）。我的输入 type=file 是只读的。有谁能够帮我？