java工具类获取properties文件的配置

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Properties;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;


public final class AppConfig {

    private static final Log logger = LogFactory.getLog(AppConfig.class);

    private static final String FILE_NAME = "xwcg.properties";

    private static AppConfig sdkConfig = null;

    /**
     * 网关请求地址
     */
    private String xwcgGatewayUrl;

    /**
     * 存管直连地址
     */
    private String xwcgServiceUrl;
    
    /**
     *存管对账文件下载地址
     */
    private String xwcgDownloadUrl;
    
    
    /**
     * 平台编号
     */
    private String platformNo;

    /**
     * 证书编号
     */
    private String keySerial;

    /**
     * 平台私钥
     */
    private String privateKey;
    
    /**
     * 平台公钥
     */
    private String publicKey;
    
    /**
     * 私钥
     */
    private String lmPrivateKey;
    
    /**
     * 公钥
     */
    private String lmPublicKey;

    /**
     * 连接超时
     */
    private int connectionTimeout;

    /**
     * 获取数据超时
     */
    private int readTimeout;

    private AppConfig() {
        this.loadPropertiesFromSrc();
    }

    public static AppConfig getConfig() {
        synchronized (AppConfig.class) {
            if (null == sdkConfig) {
                sdkConfig = new AppConfig();
            }
            return sdkConfig;
        }
    }

    private void loadPropertiesFromSrc() {
        InputStream in = null;
        try {
            Properties properties = null;
            logger.info("从classpath: "+ AppConfig.class.getClassLoader().getResource("").getPath() + " 获取属性文件" + FILE_NAME);
            in = AppConfig.class.getClassLoader().getResourceAsStream(FILE_NAME);
            if (null != in) {
                BufferedReader bf = new BufferedReader(new InputStreamReader(in, "utf-8"));
                properties = new Properties();
                try {
                    properties.load(bf);
                } catch (IOException e) {
                    throw e;
                }
            } else {
                logger.error(FILE_NAME+ "属性文件未能在classpath指定的目录下 "+ AppConfig.class.getClassLoader().getResource("").getPath() + " 找到!");
                return;
            }
            loadProperties(properties);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (null != in) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * 根据传入的properties对象设置配置参数
     * 
     * @param pro
     */
    private void loadProperties(Properties pro) {
        logger.info("开始从属性文件中加载配置项");
        String value = null;
        value = pro.getProperty("xwcgGatewayUrl");
        if (!StringUtils.isEmpty(value)) {
            this.xwcgGatewayUrl = value.trim();
        }
        value = pro.getProperty("xwcgServiceUrl");
        if (!StringUtils.isEmpty(value)) {
            this.xwcgServiceUrl = value.trim();
        }
        value = pro.getProperty("xwcgDownloadUrl");
        if (!StringUtils.isEmpty(value)) {
            this.xwcgDownloadUrl = value.trim();
        }
        value = pro.getProperty("platformNo");
        if (!StringUtils.isEmpty(value)) {
            this.platformNo = value.trim();
        }
        value = pro.getProperty("keySerial");
        if (!StringUtils.isEmpty(value)) {
            this.keySerial = value.trim();
        }
        value = pro.getProperty("privateKey");
        if (!StringUtils.isEmpty(value)) {
            this.privateKey = value.trim();
        }
        value = pro.getProperty("publicKey");
        if (!StringUtils.isEmpty(value)) {
            this.publicKey = value.trim();
        }
        value = pro.getProperty("lmPrivateKey");
        if (!StringUtils.isEmpty(value)) {
            this.lmPrivateKey = value.trim();
        }
        value = pro.getProperty("lmPublicKey");
        if (!StringUtils.isEmpty(value)) {
            this.lmPublicKey = value.trim();
        }
        value = pro.getProperty("connectionTimeout");
        if (!StringUtils.isEmpty(value)) {
            this.connectionTimeout = Integer.valueOf(value.trim());
        }
        value = pro.getProperty("readTimeout");
        if (!StringUtils.isEmpty(value)) {
            this.readTimeout = Integer.valueOf(value.trim());
        }

    }



    public String getXwcgGatewayUrl() {
        return xwcgGatewayUrl;
    }

    public void setXwcgGatewayUrl(String xwcgGatewayUrl) {
        this.xwcgGatewayUrl = xwcgGatewayUrl;
    }

    public String getXwcgServiceUrl() {
        return xwcgServiceUrl;
    }

    public void setXwcgServiceUrl(String xwcgServiceUrl) {
        this.xwcgServiceUrl = xwcgServiceUrl;
    }

    public String getXwcgDownloadUrl() {
        return xwcgDownloadUrl;
    }

    public void setXwcgDownloadUrl(String xwcgDownloadUrl) {
        this.xwcgDownloadUrl = xwcgDownloadUrl;
    }

    public String getPlatformNo() {
        return platformNo;
    }

    public void setPlatformNo(String platformNo) {
        this.platformNo = platformNo;
    }

    public String getKeySerial() {
        return keySerial;
    }

    public void setKeySerial(String keySerial) {
        this.keySerial = keySerial;
    }

    public String getPrivateKey() {
        return privateKey;
    }

    public void setPrivateKey(String privateKey) {
        this.privateKey = privateKey;
    }

    public int getConnectionTimeout() {
        return connectionTimeout;
    }

    public void setConnectionTimeout(int connectionTimeout) {
        this.connectionTimeout = connectionTimeout;
    }

    public int getReadTimeout() {
        return readTimeout;
    }

    public void setReadTimeout(int readTimeout) {
        this.readTimeout = readTimeout;
    }

    public String getPublicKey() {
        return publicKey;
    }

    public void setPublicKey(String publicKey) {
        this.publicKey = publicKey;
    }

    public String getLmPrivateKey() {
        return lmPrivateKey;
    }

    public void setLmPrivateKey(String lmPrivateKey) {
        this.lmPrivateKey = lmPrivateKey;
    }

    public String getLmPublicKey() {
        return lmPublicKey;
    }

    public void setLmPublicKey(String lmPublicKey) {
        this.lmPublicKey = lmPublicKey;
    }
}