通过id定位

import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;

public class cc {

public static void main(String[] args) {
// TODO Auto-generated method stub
//FixeFor指定路径
System.setProperty("webdriver.firefox.bin","D:/Program Files (x86)/Mozilla Firefox/firefox.exe");

WebDriver driver = new FirefoxDriver();
driver.get("https://www.baidu.com/");

WebElement searchBox = driver.findElement(By.id("kw"));
searchBox.sendKeys("青客");

WebElement serchButton = driver.findElement(By.id("su"));
serchButton.submit();

driver.close();

}

}