com.github.lynzabo.codegen.util.StringUtil Maven / Gradle / Ivy
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package com.github.lynzabo.codegen.util;
import org.apache.commons.lang.StringUtils;
/**
* 字符串操作工具类
* @author zxwu
*/
public final class StringUtil {
public static boolean isEmpty(String str) {
return str == null || str.length() == 0;
}
public static String toJoin(String[] strs,String joinStr,String connStr,String headStr,String endStr){
StringBuffer sb = new StringBuffer();
for(int i = 0;i i)
sb.append(connStr);
if(!org.apache.commons.lang.StringUtils.isEmpty(headStr))
if(strs.length-1 == i)
sb.append(endStr);
}
return sb.toString();
}
/**
* 转换下划线格式字符串为驼峰命名
* @param _name underline name
* @param firstNameIsUpper 首字母是否大写
* @return camel name
*/
public static String underline2Camel(String _name,boolean firstNameIsUpper){
String camelStr = "";
_name = _name.toLowerCase();
if (!StringUtils.contains(_name, "_")) {
return _name;
}
StringBuilder sb = new StringBuilder();
char[] cArr = _name.trim().toCharArray();
for (int i = 0; i < cArr.length; i++) {
char c = cArr[i];
if (c == '_') {
i++;
sb.append(Character.toUpperCase(cArr[i]));
} else {
sb.append(c);
}
}
camelStr = (firstNameIsUpper ? sb.substring(0, 1).toUpperCase():sb.substring(0, 1).toLowerCase()) + sb.substring(1);
return camelStr;
}
/**
* 修改字符串第一个字母为大写
* @param string string
* @return 首字母大写字符串
*/
public static String firstUpper(String string) {
String str = string.substring(0, 1).toUpperCase() + string.substring(1);
return str;
}
/**
* 字符串截断1，并修改第一个字符为小写
* 如字符串aSDfg，经该接口后变成sDfg。
* @param string string
* @return 截断了第一位，并且首字母小写字符串
*/
public static String sub1Upper(String string) {
String sr = string.substring(1);
sr = sr.substring(0,1).toLowerCase() + sr.substring(1);
return sr;
}
/**
* 字符串首字符小写
* @param sr string
* @return 首字母小写字符串
*/
public static String firstLower(String sr) {
sr = sr.substring(0,1).toLowerCase() + sr.substring(1);
return sr;
}
/*public static final char UNDERLINE='_';
public static String camelToUnderline(String param){
if (param==null||"".equals(param.trim())){
return "";
}
int len=param.length();
StringBuilder sb=new StringBuilder(len);
for (int i = 0; i < len; i++) {
char c=param.charAt(i);
if (Character.isUpperCase(c)){
sb.append(UNDERLINE);
sb.append(Character.toLowerCase(c));
}else{
sb.append(c);
}
}
return sb.toString();
}
public static String underlineToCamel(String param){
if (param==null||"".equals(param.trim())){
return "";
}
int len=param.length();
StringBuilder sb=new StringBuilder(len);
for (int i = 0; i < len; i++) {
char c=param.charAt(i);
if (c==UNDERLINE){
if (++i