Java字符串驼峰与下换线格式转换如何实现
下面是自己写的三个方法,直接类名.方法即可调用,注意此处未做异常处理.
1.下划线转驼峰lowerLineToHump()
2.首字母大写capitalizeTheFirstLetter()
3.驼峰转下划线humpToLowerLine()
packageyang.demo.justwrite;
importjava.util.regex.Matcher;
importjava.util.regex.Pattern;
/**
*@Description:变量名转换
*@Class:VariableNameConversion
*@Author:Yiang37
*@Date:2020/11/315:23
*@Version:1.0
*/
publicclassVariableNameConversion{
privatestaticPatternhumpPattern=Pattern.compile("[A-Z]");
publicstaticvoidmain(String[]args){
System.out.println(lowerLineToHump("NAME_AND_addREsS"));
System.out.println(capitalizeTheFirstLetter("nAMe"));
System.out.println(humpToLowerLine("nameAndAddress"));
}
/**
*@Description:下划线格式->驼峰大小写均可
*
*NAME_AND_ADDRESS->nameAndAddress
*@Author:Yiang37
*@Date:2020/11/0315:26:02
*@Version:1.0
*@method:lowerLineAndUppercaseToHump()
*@param:[Big_]
*@return:java.lang.String
*/
publicstaticStringlowerLineToHump(StringlowerLineAndUppercaseStr){
//拆分成数组
String[]eachStr=lowerLineAndUppercaseStr.split("_");
StringBuilderresStr=newStringBuilder();
StringfirstStr="";
StringtempStr="";
for(inti=0;i首字母大写
*NAME->Name
*name->Name
*NaMe->Name
*@Author:Yiang37
*@Date:2020/11/0316:50:16
*@Version:1.0
*@method:capitalizeTheFirstLetter()
*@param:[str]
*@return:java.lang.String
*/
publicstaticStringcapitalizeTheFirstLetter(Stringstr){
charfirstChar=str.toUpperCase().charAt(0);
StringnextStr=str.toLowerCase().substring(1);
returnfirstChar+nextStr;
}
/**
*@Description:驼峰->下划线格式默认小写,存在第二个形参且为true时大写.
*@Author:Yiang37
*@Date:2020/11/0317:10:25
*@Version:1.0
*@method:humpToLowerLine()
*@param:[humpStr,UppercaseZeroAndLowercaseOne]
*@return:java.lang.String
*/
publicstaticStringhumpToLowerLine(StringhumpStr,boolean...defaultUppercaseAndTrueLowercase){
Matchermatcher=humpPattern.matcher(humpStr);
StringBuffersb=newStringBuffer();
while(matcher.find()){
matcher.appendReplacement(sb,"_"+matcher.group(0).toLowerCase());
}
matcher.appendTail(sb);
//如果第二个形参为true转为大写
if(defaultUppercaseAndTrueLowercase.length>=1&&defaultUppercaseAndTrueLowercase[0]){
returnsb.toString().toUpperCase();
}
returnsb.toString();
}
}
输出结果
nameAndAddress
Name
name_and_address
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。