org.apache.commons.lang.StringUtils

org.apache.commons.lang.StringUtils

作为jdk中lang包的补充

检查CharSequence是否为空,null或者空格

CharSequence (CharBuffer, Segment, String, StringBuffer, StringBuilder)

• isBlank(CharSequence) 可以检查空,null和空格
• isEmpty(CharSequence) 只能检查空和null\
• 还有isNotBlank(cs)和isNotEmpt(cs)

字符串截取

Substring/Left/Right/Mid - null-safe substring extractions

字符串补全

LeftPad/RightPad/Center/Repeat - pads a String

import org.apache.commons.lang3.StringUtils;

// 右边补0至6位
StringUtils.rightPad("123", 6, "0");
// 123000

参考

• doc：https://commons.apache.org/proper/commons-lang/apidocs/index.html?org/apache/commons/lang3/StringUtils.html
• apache下载：https://commons.apache.org/proper/commons-lang/