org.apache.commons.lang.StringUtils

作為jdk中l(wèi)ang包的補(bǔ)充

檢查CharSequence是否為空,null或者空格

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

• isBlank(CharSequence) 可以檢查空,null和空格
• isEmpty(CharSequence) 只能檢查空和null\
• 還有isNotBlank(cs)和isNotEmpt(cs)

字符串截取

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

字符串補(bǔ)全

LeftPad/RightPad/Center/Repeat - pads a String

import org.apache.commons.lang3.StringUtils;

// 右邊補(bǔ)0至6位
StringUtils.rightPad("123", 6, "0");
// 123000

參考

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