spring - 在Spring JDBC中通过JNDI获取JDBC连接

Question

这个page on Spring JDBC说

The DataSourceUtils class … provides static methods to obtain connections from JNDI

但是据我所知， the API doc for DataSourceUtils不包括上述静态方法。

我想念什么？

Answer 1

嗯...某种程度上，DataSourceUtils的Javadoc更“准确”(我的意思是，该文档没有错，但是从技术上讲，您从DataSource获得了一个连接-可以通过JNDI获得):

Helper class that provides static methods for obtaining JDBC Connections from a DataSource.

并且以下方法应该是您要寻找的:

DataSourceUtils.getConnection(DataSource)

DataSourceUtils.getGetConnection(DataSource)

基本示例(来自 MySQL documentation):

// Create a new application context. this processes the Spring config
ApplicationContext ctx = new ClassPathXmlApplicationContext("ex1appContext.xml");
// Retrieve the data source from the application context
DataSource ds = (DataSource) ctx.getBean("dataSource");
// Open a database connection using Spring's DataSourceUtils
Connection c = DataSourceUtils.getConnection(ds);
try {
    // retrieve a list of three random cities
    PreparedStatement ps = c.prepareStatement(
        "select City.Name as 'City', Country.Name as 'Country' " +
        "from City inner join Country on City.CountryCode = Country.Code " +
        "order by rand() limit 3");
    ResultSet rs = ps.executeQuery();
    while(rs.next()) {
        String city = rs.getString("City");
        String country = rs.getString("Country");
        System.out.printf("The city %s is in %s%n", city, country);
    }
} catch (SQLException ex) {
    // something has failed and we print a stack trace to analyse the error
    ex.printStackTrace();
    // ignore failure closing connection
    try { c.close(); } catch (SQLException e) { }
} finally {
    // properly release our connection
    DataSourceUtils.releaseConnection(c, ds);
}