一种读取.properties配置文件参数的方法

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比如创建一个类如下：

import java.util.Properties;import org.apache.log4j.Logger;public class SMPConfigReader {private static final Logger log = Logger.getLogger(SMPConfigReader.class);private static final String FILENAME = "smp.properties";private static SMPConfigReader loader = null;private Properties m_props = null;private String vpasCodebase;private String vpasVersion;private String screenshotparameterconfigurepath;public String getScreenshotparameterconfigurepath() {return screenshotparameterconfigurepath;}public void setScreenshotparameterconfigurepath(String screenshotparameterconfigurepath) {this.screenshotparameterconfigurepath = screenshotparameterconfigurepath;}public String getPlayerpath() {return playerpath;}public void setPlayerpath(String playerpath) {this.playerpath = playerpath;}private SMPConfigReader() {this.m_props = new Properties();try {this.m_props.load(Thread.currentThread().getContextClassLoader().getResourceAsStream(FILENAME));this.vpasCodebase = this.m_props.getProperty("vpas.codebase", "CCDP3.0_VPAS.cab").trim();this.vpasVersion = this.m_props.getProperty("vpas.version", "1,0,0,1").trim();this.screenshotparameterconfigurepath=this.m_props.getProperty("screenshotparameterconfigurepath", "/webapps/iptvsmp/general/active/VPAS_CFG.txt").trim();} catch (Exception e) {log.error("SMPConfigReader", e);}}/** * Get configuration loader instance. *  * @return */public static SMPConfigReader getInstance() {if (null == loader) {loader = createInstance();}return loader;}private static synchronized SMPConfigReader createInstance() {if (null != loader) {return loader;}return new SMPConfigReader();}public String getVpasCodebase() {return vpasCodebase;}public void setVpasCodebase(String vpasCodebase) {this.vpasCodebase = vpasCodebase;}public String getVpasVersion() {return vpasVersion;}public void setVpasVersion(String vpasVersion) {this.vpasVersion = vpasVersion;}}

这样当我们要读取某个参数时，比如读取screenshotparameterconfigurepath参数时，可以通过下面这种方式读取：

SMPConfigReader.getInstance().getScreenshotparameterconfigurepath()

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