PropertiesConfiguration.java
没有close()
方法。要释放文件,还需要执行其他操作吗?在生产中使用此产品之前,我想确定一下。我已经看过代码,但是什么也看不到。我不完全确定PropertiesConfiguration.setProperty()
的工作方式,而无需打开与文件的连接,然后必须将其关闭。
最佳答案
在org.apache.commons.configuration.PropertiesConfiguration
实例中加载属性时,当然会关闭输入(流,路径,URL等)。
您可以在PropertiesConfiguration
的void load(URL url)
方法中进行确认。
这是这种方法的调用方式:
1)调用org.apache.commons.configuration.AbstractFileConfiguration
构造函数:
public PropertiesConfiguration(File file) throws ConfigurationException
2)调用其超级构造函数:
public AbstractFileConfiguration(File file) throws ConfigurationException
{
this();
// set the file and update the url, the base path and the file name
setFile(file);
// load the file
if (file.exists())
{
load(); // method which interest you
}
}
3)调用
PropertiesConfiguration
:public void load() throws ConfigurationException
{
if (sourceURL != null)
{
load(sourceURL);
}
else
{
load(getFileName());
}
}
4)调用
load()
:public void load(String fileName) throws ConfigurationException
{
try
{
URL url = ConfigurationUtils.locate(this.fileSystem, basePath, fileName);
if (url == null)
{
throw new ConfigurationException("Cannot locate configuration source " + fileName);
}
load(url);
}
catch (ConfigurationException e)
{
throw e;
}
catch (Exception e)
{
throw new ConfigurationException("Unable to load the configuration file " + fileName, e);
}
}
5)调用
load(String fileName)
public void load(URL url) throws ConfigurationException
{
if (sourceURL == null)
{
if (StringUtils.isEmpty(getBasePath()))
{
// ensure that we have a valid base path
setBasePath(url.toString());
}
sourceURL = url;
}
InputStream in = null;
try
{
in = fileSystem.getInputStream(url);
load(in);
}
catch (ConfigurationException e)
{
throw e;
}
catch (Exception e)
{
throw new ConfigurationException("Unable to load the configuration from the URL " + url, e);
}
finally
{
// close the input stream
try
{
if (in != null)
{
in.close();
}
}
catch (IOException e)
{
getLogger().warn("Could not close input stream", e);
}
}
}
并且在
load(URL url)
语句中,您可以看到在任何情况下inputstream都是关闭的。