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easyexcel is a excel handle tools written in Java

There is a newer version: 4.0.3

package com.alibaba.excel.util;

/**
 * String utils
 *
 * @author jipengfei
 */
public class StringUtils {
    public static final String EMPTY = "";

    private StringUtils() {}

    public static boolean isEmpty(Object str) {
        return (str == null || EMPTY.equals(str));
    }
}