PropsUtil.java

package org.framework.util;

/**
 * Created by lizhaoz on 2015/12/16.
 */

import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;


/**
 * Created by lizhaoz on 2015/12/13.
 */

public final class PropsUtil {
    private  static  final Logger LOGGER = LoggerFactory.getLogger(PropsUtil.class);
    /**
     * 加载属性文件
     */
    public static Properties loadProps(String fileName){
        Properties props=null;
        InputStream is=null;
        try{
            is=Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
            if (is==null){
                throw new FileNotFoundException(fileName+"file is not found");
            }
            props=new Properties();
            props.load(is);
        }
        catch (IOException e){
            LOGGER.error("load properties file failure", e);
        }
        finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    LOGGER.error("close input stream failure", e);
                }
            }
        }
        return props;
    }
    /**
     * 获取字符型属性（默认值为空字符串）
     */
    public static String getString(Properties props,String key){
        return getString(props,key,"");
    }

    public static String getString(Properties props, String key, String defaultValue) {
        String value=defaultValue;
        if (props.containsKey(key)){
            value=props.getProperty(key);
        }
        return value;
    }
    /**
     * 获取数值型属性（默认值为 0）
     */
    public static int getInt(Properties props, String key) {
        return getInt(props, key, 0);
    }

    // 获取数值型属性（可指定默认值）
    public static int getInt(Properties props, String key, int defaultValue) {
        int value = defaultValue;
        if (props.containsKey(key)) {
            value = CastUtil.castInt(props.getProperty(key));
        }
        return value;
    }
    /**
     * 获取布尔型属性（默认值为 false）
     */
    public static boolean getBoolean(Properties props, String key) {
        return getBoolean(props, key, false);
    }

    /**
     * 获取布尔型属性（可指定默认值）
     */
    public static boolean getBoolean(Properties props, String key, boolean defaultValue) {
        boolean value = defaultValue;
        if (props.containsKey(key)) {
            value = CastUtil.castBoolean(props.getProperty(key));
        }
        return value;
    }
}