Cannot resolve method 'isNotEmpty' in 'StringUtils'

这个错误通常意味着你正在使用的 StringUtils 类中没有定义 isNotEmpty 方法。可能是因为你导入的 StringUtils 类不是你想要的那个。

如果你在使用 Apache Commons Lang 库中的 StringUtils 类，请确保你已正确导入该库，并且使用的是你想要的版本。如果你使用的是其他库或自己编写的 StringUtils 类，请查看该类是否定义了 isNotEmpty 方法，并且方法的参数和返回值是否正确。如果没有定义该方法，你可以手动编写一个类似的方法来解决问题。

相关问题

cannot resolve method error in logger

The "cannot resolve method" error in a logger indicates that the method being called does not exist in the logger's class or in any of its superclasses. This error can occur if you are using an outdated version of the logger or if you have misspelled the method name.

To resolve this error, make sure that you are using the correct version of the logger and that you have spelled the method name correctly. You can also check the logger's documentation or source code to ensure that the method you are trying to call actually exists.

Cannot resolve method 'isBlank' in 'StringUtils'

The method `isBlank()` was introduced in Java 11 and is not available in earlier versions. If you are using an earlier version of Java, you will not be able to use this method directly.

One way to check if a string is blank in earlier versions of Java is to use the `trim()` method to remove leading and trailing whitespace and then check if the resulting string is empty:

String str = "   ";
if(str.trim().isEmpty()) {
    // String is blank
}

Alternatively, you can create your own utility method to check if a string is blank:

public static boolean isBlank(String str) {
    return str == null || str.trim().isEmpty();
}

Then you can use this method to check if a string is blank:

String str = "   ";
if(StringUtils.isBlank(str)) {
    // String is blank
}

Note that the `StringUtils` class you are referring to is likely from the Apache Commons Lang library, which provides additional utility methods for working with strings. If you are using this library, you can use the `StringUtils.isBlank()` method directly.