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我需要編寫一個連接到數據庫並從.properties文件讀取連接屬性的Web應用程序。
我使用Maven,我想爲我的應用程序編寫一些單元測試。
要測試與數據庫的作品,我把我的.properties文件爲src /主/資源和測試/主/資源並寫了下面的代碼讀取屬性的類:無法在Tomcat的應用程序中加載.properties
package util;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import org.apache.log4j.Logger;
/**
*
* @author proger
*/
public class ProgrammSettings {
private static Logger logger = Logger.getRootLogger();
private static String propertiesPath = "program.settings.properties";
private static Properties props;
public static String getProperty(String key) {
if (props == null)
loadProperties();
return props.getProperty(key);
}
public static void setResourcesFilePath(String path) {
propertiesPath = path;
}
private static void loadProperties() {
InputStream propOut = null;
try {
//URL url = ClassLoader.getSystemResource(propertiesPath);
propOut = ClassLoader.getSystemClassLoader().getResourceAsStream(propertiesPath); //new FileInputStream(url.getFile());
props = new Properties();
props.load(propOut);
} catch (Exception ex) {
//Logger.getLogger(ProgrammSettings.class.getName()).log(Level.SEVERE, null, ex);
String errorMessage = "Error during properties file reading. Path to file: '" +
propertiesPath + "'";
logger.error(errorMessage, ex);
throw new RuntimeException(errorMessage, ex);
} finally {
try {
if (propOut != null)
propOut.close();
} catch (IOException ex) {
logger.error("Error during closing stream from properties file", ex);
}
}
}
}
我想同樣的代碼工作無論是測試和應用程序類,所以我從classPath讀取屬性文件。 我的所有測試都通過,我的.properties文件被Maven打包成戰爭。但是當我從Netbeans運行我的應用程序時,我收到了:
java.lang.NullPointerException
java.util.Properties$LineReader.readLine(Properties.java:435)
java.util.Properties.load0(Properties.java:354)
java.util.Properties.load(Properties.java:342)
util.ProgrammSettings.loadProperties(ProgrammSettings.java:49)
util.ProgrammSettings.getProperty(ProgrammSettings.java:33)
dataacess.AbstractDataMapper.loadDriver(AbstractDataMapper.java:58)
dataacess.AbstractDataMapper.<init>(AbstractDataMapper.java:41)
dataacess.UserMapper.<init>(UserMapper.java:25)
servlets.UserRegistration.processRequest(UserRegistration.java:86)
servlets.UserRegistration.doPost(UserRegistration.java:132)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
我該如何解決?謝謝你在前進
你可以請編輯您的目錄結構,你的問題 – 2010-12-05 18:43:14
我有Maven項目的標準目錄結構。 – 2010-12-05 19:22:36