Java实现驼峰、下划线互转
1.使用 Guava 实现
先引入相关依赖
```1 1.1 驼峰转下划线 ```java public static void main(String[] args) { String resultStr = CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, "userName"); System.out.println("转换后结果是:"+resultStr); } 转换后结果是:user_name com.google.guava guava 21.0
1.2 下划线转驼峰
public static void main(String[] args) { String resultStr = CaseFormat.LOWER_UNDERSCORE.to(CaseFormat.LOWER_CAMEL, "user_name"); System.out.println("转换后结果是:"+resultStr); } 转换后结果是:userName
2.自定义代码转
2.1驼峰转下划线
private static final Pattern TPATTERN = Pattern.compile("[A-Z0-9]"); private String teseDemo(String str) { Matcher matcher = TPATTERN.matcher(str); StringBuffer sb = new StringBuffer(); while (matcher.find()) { matcher.appendReplacement(sb, "_" + matcher.group(0).toLowerCase()); } matcher.appendTail(sb); return sb.toString(); }
2.2下划线转驼峰
private static final char UNICON = '_'; private String underlineToCamel(String param) { if (StringUtils.isBlank(param)) { return ""; } int len = param.length(); StringBuilder sb = new StringBuilder(len); for (int i = 0; i < len; i++) { char c = Character.toLowerCase(param.charAt(i)); if (c == UNICON) { if (++i < len) { sb.append(Character.toUpperCase(param.charAt(i))); } } else { sb.append(c); } } return sb.toString(); }
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原文地址:https://blog.csdn.net/Lee_XCSDN/article/details/128618084