1.引入依赖

<dependency>
  <groupId>com.google.guava</groupId>
  <artifactId>guava</artifactId>
  <version>33.1.0-jre</version>
</dependency>

2.下划线 -> 驼峰

String columnName = "student_name";
String resultStr = CaseFormat.LOWER_UNDERSCORE.to(CaseFormat.LOWER_CAMEL, columnName);

// resultStr输出 ---> studentName

3.驼峰 -> 下划线

String resultStr = CaseFormat.LOWER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, "studentName");

// resultStr输出 ---> student_name