获得.properties文件参数

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
public class SystemManager {
static private SystemManager instance;
Properties sysProps = null;
InputStream is=null;
FileOutputStream os=null;
    private String resourceURI="/conf.properties";//资源定位

public void setResourceURI(String resourceURI) {
this.resourceURI = resourceURI;
}

public SystemManager() {
this.init();
}

static synchronized public SystemManager getInstance() {
if (instance == null) {
instance = new SystemManager();
}
return instance;
}

public void init() {
is = getClass().getResourceAsStream(resourceURI);
sysProps = new Properties();
try {
sysProps.load(is);
} catch (Exception e) {
e.printStackTrace();
} finally {
            if ( is != null)
            {
                try
                {
                is.close();                   
                }
                catch( Exception e)
                {
                e.printStackTrace();
                }
            }
        }
}

public String getPropValue(String propertyName) {
if (sysProps != null) {
return sysProps.getProperty(propertyName);

}

return "";
}

/**
* add by licq for logInterceptor
*
* @return Properties
*/
public Properties getProperties() {
return sysProps;
}

public void setProperties(Properties props) {
this.sysProps=props;
}

/**
* add by liuliang
* 用于系统参数管理
* @return Properties
*/
public void reload() {
init();
}

public void setPropValue(String propertyName,String propertyValue) {
if (sysProps != null) {
sysProps.setProperty(propertyName,propertyValue);
}
}

public void store(String comments) {
if (sysProps != null) {
try {
String path =getClass().getResource(resourceURI).getPath();
os = new FileOutputStream (path);
sysProps.store(os,comments);
} catch (FileNotFoundException e) {
            e.printStackTrace();
}  catch (IOException e) {
e.printStackTrace();
} finally {
            if ( os != null)
            {
                try
                {
                os.close();                   
                }
                catch( Exception ee )
                {
                ee.printStackTrace();
                }
            }
        }
}
}


}