为什么 HikariCP 说 "Property database does not exist on target class org.postgresql.ds.PGSimpleDataSource"？

Question

我正在尝试为我的 HikariCP 池设置各种 PostgreSQL JDBC 驱动程序 properties，但由于某种原因，它声明这些属性不存在。为什么这样？我是否使用了错误的参数名称？

import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource

import java.sql.Connection;
import java.sql.SQLException;

public class HikariTest {
    public static void main(String[] args) throws SQLException {
        HikariConfig config = new HikariConfig();
        config.setDataSourceClassName("org.postgresql.ds.PGSimpleDataSource");
        config.setUsername("[REDACTED]");
        config.setPassword("[REDACTED]");
        config.addDataSourceProperty("host", "[REDACTED");
        config.addDataSourceProperty("database", "[REDACTED]");
        config.addDataSourceProperty("ssl", true);
        config.addDataSourceProperty("sslcert", "[REDACTED]");
        HikariDataSource ds = new HikariDataSource(config);
        Connection conn = ds.getConnection();
    }
}

输出：

Exception in thread "main" java.lang.RuntimeException: Property database does not exist on target class org.postgresql.ds.PGSimpleDataSource
    at com.zaxxer.hikari.util.PropertyElf.setProperty(PropertyElf.java:127)
    at com.zaxxer.hikari.util.PropertyElf.lambda$setTargetFromProperties[=12=](PropertyElf.java:51)
    at java.base/java.util.concurrent.ConcurrentHashMap.forEach(ConcurrentHashMap.java:1603)
    at java.base/java.util.Properties.forEach(Properties.java:1422)
    at com.zaxxer.hikari.util.PropertyElf.setTargetFromProperties(PropertyElf.java:46)
    at com.zaxxer.hikari.pool.PoolBase.initializeDataSource(PoolBase.java:323)
    at com.zaxxer.hikari.pool.PoolBase.<init>(PoolBase.java:112)
    at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:93)
    at com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:81)
    at HikariTest.main(HikariTest.java:21)

Answer 1

它给出了那个错误，因为 PGSimpleDataSource does not have a property database (i.e. it doesn't have a setDatabase(String) method). It does have a property databaseName (setDatabaseName defined in BaseDataSource)。此属性在 JDBC 4.3 规范的 9.6.1 DataSource 属性 部分中指定。

阅读评论，您似乎将 JDBC URL format（和连接属性）的文档与驱动程序提供的数据源实现上可用的属性混淆了。需要明确的是，该文档没有指定属性 database，它仅使用 database 作为 JDBC URL 语法中的占位符（如在 jdbc:postgresql://主机/数据库.

为什么 HikariCP 说 "Property database does not exist on target class org.postgresql.ds.PGSimpleDataSource"？

Why does HikariCP say "Property database does not exist on target class org.postgresql.ds.PGSimpleDataSource"?

java

postgresql

jdbc

hikaricp