<dependency>
  <groupId>org.crazycake</groupId>
  <artifactId>camel-name-utils</artifactId>
  <version>1.0.0-RELEASE</version>
</dependency>

使用方式

@Test
public void testCamel2underscore() {
        String underscoreName = CamelNameUtils.camel2underscore("AaaBbb");
        assertThat(underscoreName, is("aaa_bbb"));
}

@Test
public void testUnderscore2camel() {
        String camelName = CamelNameUtils.underscore2camel("user_name");
        assertThat(camelName,is("userName"));
}

@Test
public void testCapitalize() {
        String capitalName = CamelNameUtils.capitalize("student");
        assertThat(capitalName,is("Student"));
}