鉴于您已找到您的元素，并且您想检查class-attribute中的某个类：

Given you already found your element AND you want to check for a certain class inside the class-attribute:

public boolean hasClass(WebElement element) {
    String classes = element.getAttribute("class");
    for (String c : classes.split(" ")) {
        if (c.equals(theClassYouAreSearching)) {
            return true;
        }
    }

    return false;
}

编辑

正如@aurelius正确指出的那样，有一种更简单的方法（效果不佳）：

EDIT

As @aurelius rightly pointed out, there is an even simpler way (that doesn't work very well):

public boolean elementHasClass(WebElement element, String active) {
    return element.getAttribute("class").contains(active);
}

这种方法看起来更简单，但有一个很大的警告：

This approach looks simpler but has one big caveat:

正如@JuanMendes所指出的，如果您要搜索的类名是其他类名的子字符串，则会遇到问题：

As pointed out by @JuanMendes you will run into problems if the class-name you're searching for is a substring of other class-names:

例如class =test-a test-b，搜索class.contains（test）将返回true但它应该为false

for example class="test-a test-b", searching for class.contains("test") will return true but it should be false