How to use

cleanPackageName

method

in

io.spring.initializr.metadata.InitializrConfiguration

/**
 * Clean the specified package name if necessary. If the package name cannot be
 * transformed to a valid package name, the {@code defaultPackageName} is used
 * instead.
 * <p>
 * The package name cannot be cleaned if the specified {@code packageName} is
 * {@code null} or if it contains an invalid character for a class identifier.
 * @param packageName the package name
 * @param defaultPackageName the default package name
 * @return the cleaned package name
 * @see Env#getInvalidPackageNames()
 */
public String cleanPackageName(String packageName, String defaultPackageName) {
  if (!StringUtils.hasText(packageName)) {
    return defaultPackageName;
  }
  String candidate = cleanPackageName(packageName);
  if (hasInvalidChar(candidate.replace(".", ""))
      || this.env.invalidPackageNames.contains(candidate)) {
    return defaultPackageName;
  }
  else {
    return candidate;
  }
}

@Test
void generatePackageNameSimpleUnderscore() {
  assertThat(this.properties.cleanPackageName("com.my_foo", "com.example"))
      .isEqualTo("com.my_foo");
}

@Test
void generatePackageNameMultipleSpaces() {
  assertThat(this.properties.cleanPackageName("  com   foo  ", "com.example"))
      .isEqualTo("com.foo");
}

@Test
void generatePackageNameInvalidStartCharacter() {
  assertThat(this.properties.cleanPackageName("0com.foo", "com.example"))
      .isEqualTo("com.foo");
}

@Test
void generatePackageNameInvalidPackageName() {
  assertThat(this.properties.cleanPackageName("org.springframework", "com.example"))
      .isEqualTo("com.example");
}

@Test
void generatePackageNameSimple() {
  assertThat(this.properties.cleanPackageName("com.foo", "com.example"))
      .isEqualTo("com.foo");
}

@Test
void generatePackageNameMultipleDashers() {
  assertThat(this.properties.cleanPackageName("com.foo--bar", "com.example"))
      .isEqualTo("com.foobar");
}

@Test
void generatePackageNameNull() {
  assertThat(this.properties.cleanPackageName(null, "com.example"))
      .isEqualTo("com.example");
}

@Test
void generatePackageNameSimpleColon() {
  assertThat(this.properties.cleanPackageName("com:foo", "com.example"))
      .isEqualTo("com.foo");
}

@Test
void generatePackageNameVersion() {
  assertThat(this.properties.cleanPackageName("com.foo.test-1.4.5", "com.example"))
      .isEqualTo("com.foo.test145");
}

@Override
public String getContent() {
  String value = super.getContent();
  if (value != null) {
    return value;
  }
  else if (this.groupId.getContent() != null
      && this.artifactId.getContent() != null) {
    return InitializrConfiguration.cleanPackageName(
        this.groupId.getContent() + "." + this.artifactId.getContent());
  }
  return null;
}

      metadata.getConfiguration().generateApplicationName(getName()));
setPackageName(metadata.getConfiguration().cleanPackageName(getPackageName(),
    metadata.getPackageName().getContent()));