从 Groovy class 创建 Spring bean 导致 "cannot find symbol error"

Creating a Spring bean from a Groovy class leads to "cannot find symbol error"

我有一个 groovy class returns 一个数据库客户端的实例:

class DBClient {

private static DBClient INSTANCE

private String url
private String userName
private String password
private String driver

@Synchronized
static DBClient getInstance() {
    if (!INSTANCE) {
        INSTANCE = new DBClient()
    }
    return INSTANCE
}

 Sql sql = Sql.newInstance(url, userName, password, driver)

void setUrl(String url) {
    this.url = url
}

void setUserName(String userName) {
    this.userName = userName
}

void setPassword(String password) {
    this.password = password
}

void setDriver(String driver) {
    this.driver = driver
}


def getAllSaa() {
    sql.rows("select * from Saa")
}
}

我尝试在 @Configuration class:

中创建这个 class 的 bean
@Configuration
@Profile("prod")
public class OracleServerConfiguration {

@Bean
public DBClient dbClient () {

    DBClient dbClient = DBClient.getInstance();

    dbClient.setUrl("jdbc:oracle:thin:@localhost:1521:xe");
    dbClient.setUserName("SYSTEM");
    dbClient.setPassword("1111");
    dbClient.setDriver("oracle.jdbc.OracleDriver");

    return dbClient;
}
}

在 IntelliJ 中看起来不错,但是当我尝试使用 gradle 构建项目时,出现错误

"OracleServerConfiguration.java:14: 错误: 找不到符号 DBClient dbClient = DBClient.getInstance();符号:class DBClient 位置:class OracleServerConfiguration".

我尝试为 DBClient class 中的所有字段创建 getter 和 setter,但无济于事。

有人有从 groovy classes 创建 bean 的经验吗?

这里回答了一个类似的问题:Referencing Groovy from Java with Gradle and Spring Boot results in"cannot find symbol" 就我而言,我只是决定将模块完全保留在 Groovy 中,这解决了问题。