无法从java中的属性文件读取值

其实我试图从JSP页面获取值并将这些数据写入config.properties文件。我可以在其中写入数据。但我无法从该config.properties文件读取属性值。无法从java中的属性文件读取值

public static void startup() throws ReflectiveOperationException, Exception { 
     String configPath ="C:/Selenium_Automation_JSP/automation/src/com/selenium/config/config.properties"; 
     DriverScript Test = new DriverScript(configPath); 
     System.out.println("Config path loaded"); 
     Test.start(configPath); 
    } 

     public void start(String configPath) throws ReflectiveOperationException, IllegalArgumentException, Exception{ 



      System.out.println(configPath); 

      CONFIG=new Properties(); 
      FileInputStream fs = new FileInputStream(configPath); 
      CONFIG.load(fs); 

      String mapFile=CONFIG.getProperty("Suite"); 

      System.out.println(mapFile); 
      SuiteXLS = new Xls_Reader(mapFile);

在控制台中，我可以看到config.properties的路径。但是在读取文件时，它显示了以下错误，

Config path loaded 
C:/Selenium_Automation_JSP/automation/src/com/selenium/config/config.properties 
null 
java.lang.NullPointerException 
    at java.io.FileInputStream.<init>(FileInputStream.java:124) 
    at java.io.FileInputStream.<init>(FileInputStream.java:87) 
    at com.selenium8x8.xlsoperations.Xls_Reader.<init>(Xls_Reader.java:43) 
    at com.selenium8x8.driver.DriverScript.start(DriverScript.java:106) 
    at com.selenium8x8.driver.DriverScript.startup(DriverScript.java:85) 
    at com.selenium8x8.servlet.ControlServlet.doPost(ControlServlet.java:120) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:647) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) 
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    at java.lang.Thread.run(Thread.java:724)

这是我config.properties文件

TestURL=http://agents.8x8pilot.com/ 
Suite=C:/Selenium_Automation_JSP/automation/src/com/selenium/xls/Suite.xlsx 
ObjectRepository=C:/Selenium_Automation_JSP/automation/src/com/selenium/xls/ObjectRepository.xls 
DataManagement=C:Selenium_Automation_JSP/automation/src/com/selenium/xls/StoredData.xls

但我不能能够读取“套房”的属性值。。

来源

2013-10-17 Prasanna

-1

您需要你用configPath更改为：

String configPath ="C:\\Selenium_Automation_JSP\\automation\\src\\com\\selenium\\config\\config.properties";

，然后加载它想：

CONFIG.load(new FileInputStream(configPath));

编辑：按@sircapsalot，绝对路径是一个坏主意。如果你认为你的configPath会改变，你可以使用它将其更改为绝对路径使用正则表达式或类似的东西，然后将其传递给FileInputStream。我应该清楚地知道FileInputStream确实需要绝对路径才能工作。

来源

2013-10-17 12:01:29 user2339071

而我依然面临着同样的问题.. – Prasanna

这是不好的..不建议这样的绝对路径！使用'ClassLoader's – sircapsalot

尝试

CONFIG=new Properties(); 
CONFIG.store(new FileOutputStream(configPath), null); 
CONFIG.getProperty("Suite");

来源

2013-10-17 12:28:00 AJJ

无法从java中的属性文件读取值

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