Java 空值判断的工具类
空值判断类
项目中引入
<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.8.1</version>
</dependency>
用发如下
StringUtils.isBlank(Str);
部分源码如下
public static boolean isBlank(CharSequence cs) {
int strLen;
if (cs != null && (strLen = cs.length()) != 0) {
for(int i = 0; i < strLen; ++i) {
if (!Character.isWhitespace(cs.charAt(i))) {
return false;
}
}
return true;
} else {
return true;
}
}
public static boolean isNotBlank(CharSequence cs) {
return !isBlank(cs);
}